INTEGRATED SURGICAL SYSTEMS INC
S-3, 2000-02-15
SURGICAL & MEDICAL INSTRUMENTS & APPARATUS
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<PAGE>   1

   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON FEBRUARY 15, 1999

                                                      REGISTRATION NO. 333-
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                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                            ------------------------

                                    FORM S-3
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933

                            ------------------------

                       INTEGRATED SURGICAL SYSTEMS, INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

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                DELAWARE                         1850 RESEARCH PARK DRIVE                        60-0232575
    (STATE OR OTHER JURISDICTION OF            DAVIS, CALIFORNIA 95616-4884                   (I.R.S. EMPLOYER
     INCORPORATION OR ORGANIZATION)             TELEPHONE: (530) 792-2600                   IDENTIFICATION NO.)
                                                TELECOPIER: (530) 792-2690
                              (ADDRESS AND TELEPHONE NUMBER OF PRINCIPAL EXECUTIVE OFFICES)
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                           -------------------------

                               Ramesh C. Trivedi
                     CHIEF EXECUTIVE OFFICER AND PRESIDENT
                       INTEGRATED SURGICAL SYSTEMS, INC.
                            1850 RESEARCH PARK DRIVE
                          DAVIS, CALIFORNIA 95616-4884
                           TELEPHONE: (530) 792-2600
                           TELECOPIER: (530) 792-2690
           (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
                   INCLUDING AREA CODE, OF AGENT FOR SERVICE)

                           -------------------------

  A COPY OF ALL COMMUNICATIONS, INCLUDING COMMUNICATIONS SENT TO THE AGENT FOR
                           SERVICE SHOULD BE SENT TO:

                               JACK BECKER, ESQ.
                            SNOW BECKER KRAUSS P.C.
                                605 THIRD AVENUE
                           NEW YORK, N.Y. 10158-0125
                           TELEPHONE: (212) 687-3860
                           TELECOPIER: (212) 949-7052

     APPROXIMATE DATE OF PROPOSED SALE TO THE PUBLIC:  As soon as practicable
after the effective date of this registration statement.

                           -------------------------

     If the only securities being registered on this form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. [ ]

     If any of the securities being registered on this form are to be offered or
delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. [X]

     If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [ ]

     If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ]

     If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [ ]

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<PAGE>   2

                        CALCULATION OF REGISTRATION FEE

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<CAPTION>
                                                          PROPOSED         PROPOSED
TITLE OF EACH                                              MAXIMUM         MAXIMUM       AMOUNT OF
CLASS OF SECURITIES                  AMOUNT TO BE      OFFERING PRICE      OFFERING     REGISTRATION
TO BE REGISTERED                      REGISTERED       PER SECURITY(1)     PRICE(1)         FEE
- -------------------                  ------------      ---------------    ----------    ------------
<S>                                  <C>               <C>                <C>           <C>
Common Stock, $.01 par value.......   2,125,000(2)          $2.25(3)      $4,781,250     $1,262.25
</TABLE>

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(1) Estimated solely for the purpose of calculating the registration fee
    pursuant to Rule 457 promulgated under the Securities Act of 1933.

(2) Represents shares to be sold by the selling securityholders named herein.
    Also includes an indeterminate number of shares that the selling
    securityholders may acquire as a result of a stock split, stock dividend or
    similar transaction involving the common stock pursuant to the antidilution
    provisions of the Registrant's series F convertible preferred stock. Does
    not include additional shares that may be acquired by the selling
    securityholders upon conversion of the series F convertible preferred stock
    attributable to the operation of the conversion price formula set forth in
    the certificate of designations for those series of convertible preferred
    stock due to a decline in the market price of the common stock.

(3) Calculated solely for the purpose of determining the registration fee
    pursuant to rule 457(c) based upon the closing price of the common stock on
    The Nasdaq SmallCap Market on February 10, 2000.
                           -------------------------

     The Registrant hereby amends this Registration Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a further amendment which specifically states that this Registration
Statement shall thereafter become effective in accordance with Section 8(a) of
the Securities Act of 1933, as amended, or until the Registration Statement
shall become effective on such date as the Commission, acting pursuant to said
Section 8(a), may determine.
<PAGE>   3

                 PRELIMINARY PROSPECTUS DATED FEBRUARY 15, 2000

                       INTEGRATED SURGICAL SYSTEMS, INC.

                                  COMMON STOCK

The selling securityholders named in this prospectus are offering and selling up
to 2,125,000 shares of our common stock, including 2,000,000 shares that they
may acquire upon conversion of our series F preferred stock.

The common stock is quoted on The Nasdaq SmallCap Market under the symbol
"RDOC", and is listed on The Pacific Exchange Inc. under
the symbol "ROB". The common stock also has been admitted for trading on the
European Association of Securities Dealers' Automated Quotation system under the
symbol "RDOC".

THE COMMON STOCK IS A SPECULATIVE INVESTMENT AND INVOLVES A HIGH DEGREE OF RISK.
YOU SHOULD READ THE DESCRIPTION OF CERTAIN RISKS UNDER THE CAPTION "RISK
FACTORS" COMMENCING ON PAGE 2 BEFORE PURCHASING THE COMMON STOCK.

Our executive offices are at 1850 Research Park Drive, Davis, California
95616-4884, and our telephone number is 530-792-2600.

THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SEC OR ANY STATE
SECURITIES COMMISSION NOR HAS THE SEC OR ANY STATE SECURITIES COMMISSION PASSED
UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE
CONTRARY IS A CRIMINAL OFFENSE.

                           -------------------------

              THE DATE OF THIS PROSPECTUS IS               , 2000

INFORMATION CONTAINED IN THIS PROSPECTUS IS SUBJECT TO COMPLETION OR AMENDMENT.
A REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE SOLD NOR MAY OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE
REGISTRATION STATEMENT BECOMES EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE
AN OFFER TO SELL OR THE SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY
SALE OF THESE SECURITIES IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE
WOULD BE UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES
LAWS OF ANY STATE.
<PAGE>   4

                               TABLE OF CONTENTS

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                                                              PAGE
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Risk Factors................................................    2
Forward Looking Statements..................................   10
Selling Securityholders.....................................   11
Plan of Distribution........................................   13
Information About Integrated Surgical Systems, Inc. ........   14
Recent Developments.........................................   14
Preferred Stock Financings..................................   15
Where You Can Find More Information.........................   16
Information Incorporated By Reference.......................   16
Legal Matters...............................................   17
Experts.....................................................   17
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                           -------------------------

This prospectus is part of a registration statement we filed with the SEC. You
should rely only on the information or representations provided in this
prospectus. We have not authorized anyone to provide you with different
information. The common stock will not be offered in any state where an offer is
not permitted. You should not assume that the information in this prospectus is
accurate as of any date other than the date on the cover of this prospectus.
<PAGE>   5

                                  RISK FACTORS

WE HAVE A HISTORY OF OPERATING LOSSES AND THESE LOSSES MAY CONTINUE.

We have experienced significant losses since we began operations. We incurred
net losses of approximately $10.3 million for the year ended December 31, 1998
and approximately $4.5 million for the year ended December 31, 1997 and a net
loss of approximately $6.6 million for the nine months ended September 30, 1999
as compared to a net loss of approximately $7.5 million for the nine months
ended September 30, 1998. As a result of these losses, we had an accumulated
deficit of approximately $42 million as of September 30, 1999. We will continue
to incur losses until such time, if ever, as we derive significant revenues from
the sale of our products.

OUR POTENTIAL FUTURE SUCCESS AND FINANCIAL PERFORMANCE WILL DEPEND ALMOST
ENTIRELY ON OUR ABILITY TO SUCCESSFULLY MARKET THE ROBODOC SYSTEM.

For the near term, we expect to derive most of our revenues from sales of the
ROBODOC System. Accordingly, our potential future success and financial
performance will depend almost entirely on our ability to successfully market
the ROBODOC System. To successfully market the ROBODOC System, we must commit
substantial marketing efforts, develop an effective sales and marketing
organization, and expend significant funds to inform potential customers,
including hospitals and physicians, of the distinctive characteristics and
advantages of using the ROBODOC System instead of traditional surgical tools and
procedures. Since the ROBODOC System employs innovative technology, rather than
being an improvement of existing technology, and represents a substantial
capital expenditure, we expect to encounter resistance to change, which we must
overcome if the ROBODOC System is to achieve significant market acceptance.
Furthermore, our ability to market the ROBODOC System in the United States is
dependent upon approval by the U.S. Food and Drug Administration. We cannot give
you any assurance that we will obtain FDA approval to market the ROBODOC System
in the United States, or that the ROBODOC System will achieve significant market
acceptance in the United States, Europe and other foreign markets to generate
sufficient revenues to become profitable.

ALTERNATIVES TO OUR PRODUCTS MAY AFFECT OUR POTENTIAL FUTURE SUCCESS.

The principal competition for the ROBODOC System is manual surgery performed by
orthopaedic surgeons, using surgical power tools and manual devices. The
providers of these instruments are the major orthopaedic companies, which
include Howmedica, Inc. (a subsidiary of Stryker Corporation), located in New
York; Zimmer, Inc. (a subsidiary of Bristol-Myers Squibb Company), located in
Indiana; Johnson & Johnson Orthopaedics, Inc. (a subsidiary of Johnson &
Johnson), located in New Jersey; DePuy, Inc. (a subsidiary of Johnson & Johnson)
located in Indiana; Biomet, Inc., located in Indiana; and Osteonics, Inc. (a
subsidiary of the Stryker Corporation), located in New Jersey.

Orto Maquet, a German manufacturer and major supplier of operating tables to
hospitals and physicians in Europe, has entered the market with a device
intended to compete with the ROBODOC System. Orto Maquet's system incorporates
pin-based registration and requires a second surgical procedure to place pins in
the patient's thigh bone prior to performing hip replacement surgery. Although
Orto Maquet offers a pre-surgical planning station, only our ROBODOC System
offers enhancements that allow the surgeon to plan and perform revision hip
surgery, the replacement of a previous hip implant. Orto Maquet has
relationships with hospitals and physicians throughout Europe as a supplier of
operating tables and has greater financial, marketing and distribution resources
than us. Several of our potential customers in Germany have decided to purchase
the Orto Maquet system instead of the ROBODOC System due to their preference for
doing business with a German company.

The principal competition for the NeuroMate System are frame-based and frameless
navigators, which are manually operated. Approximately twenty navigator models
have been introduced, including those by Radionics, Sofamor-Danek and Ohio
Medical Surgical products, all located in the United States; Elekta,

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<PAGE>   6

located in Sweden; and Fischer Leibingher and Brain Lab, both located in
Germany. In general, there are companies in the medical products industry
capable of developing and marketing computer-controlled robotic systems for
surgical applications, many of whom have significantly greater financial,
technical, manufacturing, marketing and distribution resources than us, and have
established reputations in the medical device industry. Furthermore, we cannot
give you any assurance that IBM or the University of California, which developed
the technology embodied in the ROBODOC System and hold patents relating thereto,
will not enter the market or license the technology to other companies.

We cannot give you any assurance that future competition will not have a
material adverse effect on our business. The cost of our systems represents a
significant capital expenditure for a customer and accordingly may discourage
purchases by certain customers.

WE NEED BUT HAVE NOT YET OBTAINED APPROVAL OF THE U.S. FOOD AND DRUG
ADMINISTRATION TO MARKET THE ROBODOC SYSTEM IN THE UNITED STATES.

Before a new medical device can be introduced into the U.S. market, the
manufacturer must obtain FDA permission to market through either the 510(k)
pre-market notification process for medical devices which are substantially
similar to other approved medical devices or the costlier, lengthier and less
certain pre-market approval application process. Following a pre-filing meeting
with representatives of the FDA in early 1998, we stated that we intended to
file our pre-market approval application to market the ROBODOC System with the
FDA in the second quarter of 1998. As a result of further discussions with
representatives of the FDA as part of the pre-submission review process (which
process is intended to expedite the FDA's formal pre-market approval process),
we have deferred the filing of our pre-market approval application with the FDA
so that we may incorporate our DigiMatch Single Surgery System, and possibly
other technical developments, as part of our pre-market approval application. We
believe, based upon our discussions with representatives of the FDA, that the
incorporation of the DigiMatch Single Surgery System will enhance our prospects
for obtaining FDA approval. However, we cannot give you any assurance as to when
or if the FDA will grant pre-market approval for the ROBODOC System or that such
approval, if obtained, will not include unfavorable limitations or restrictions.

In order to obtain FDA clearance or approval, we must demonstrate that the
ROBODOC System is safe and effective, and we may be required to show a clinical
benefit to patients. We believe that a reduced incidence of intraoperative
fractures with the ROBODOC System compared to conventional total hip replacement
surgery would offer an important benefit. The number of patients enrolled in our
U.S. clinical study is less than the 300 patients (150 ROBODOC System; 150
control group) we initially requested to study in our investigational device
exemption application to the FDA. Nonetheless, over 4,000 primary surgeries have
been performed with the ROBODOC System in the U.S. clinical trial and the
European treatment population without a single reported intraoperative fracture.
Since the observed fracture rate in the control group in the U.S. clinical trial
was lower than anticipated, the data from this study are not sufficient to
establish a statistically significant reduction in intraoperative fractures
compared to the control group. Nevertheless, the data from both the U.S. and the
European group of patients suggest that the ROBODOC System reduces
intraoperative fractures when compared to the fracture rate of approximately 3
to 28 percent for conventional surgery reported in the scientific and medical
literature. However, we cannot give you any assurance that the FDA will agree
that the ROBODOC System offers a clinically significant reduction in
intraoperative fractures, in the absence of a controlled trial demonstrating
such a reduction, or that such a reduction is of clinical benefit to patients.

The FDA has advised us that it believes long-term functional assessments are the
primary endpoints for evaluating the safety and effectiveness of the ROBODOC
System. Our preliminary review of the functional assessment data from the U.S.
clinical trial shows equivalence between the ROBODOC System and conventional
surgery. We believe that achieving better implant fit and alignment in the
femoral cavity are significant factors in the success of cementless total hip
replacement surgery, although the FDA has questioned whether fit is an
appropriate endpoint and has not addressed alignment.

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<PAGE>   7

Our most recent statistical analysis of fit and alignment parameters from
3-month radiographs showed that the ROBODOC System surgeries produced better fit
and alignment when compared to conventional surgeries. We believe a more
accurate fit of the prosthesis reflects the implant manufacturers' design goals
for implant cavity preparation. We also reviewed 24-month radiographs evaluating
prosthesis stability. We cannot give you any assurance that the FDA will accept
our data that demonstrates the ROBODOC System achieves better implant fit,
alignment and stability, or that the FDA will agree that better fit and
alignment are significant surgical endpoints. In addition, we cannot give you
any assurance that the FDA will agree that the greater surgery time and blood
loss associated with the ROBODOC System does not pose a significant safety
concern or create an unfavorable risk/benefit ratio. Further, we cannot give you
any assurance that the FDA will not require us to obtain additional clinical
data from a randomized, controlled trial to resolve any concern about the
risk/benefit ratio offered by the ROBODOC System. If we must obtain such
additional data, the FDA review process could be prolonged by several years.

WE MAY NOT BE ABLE TO COMPLY WITH QUALITY SYSTEM AND OTHER FDA REPORTING AND
INSPECTION REQUIREMENTS.

Assuming we obtain the necessary FDA approvals and clearances for our products,
in order to maintain such approvals and clearances we must, among other things,
register our establishment and list our devices with the FDA and with certain
state agencies, maintain extensive records, report any adverse experiences on
the use of our products and submit to periodic inspections by the FDA and
certain state agencies. The Food, Drug, and Cosmetic Act also requires devices
to be manufactured in accordance with the quality system regulation, which sets
forth good manufacturing practices requirements with respect to manufacturing
and quality assurance activities. The quality system regulation revises the
previous good manufacturing practices regulation and imposes certain enhanced
requirements that are likely to increase the cost of compliance, including
design controls.

WE MAY NOT BE ABLE TO OBTAIN REGULATORY APPROVALS NEEDED TO SELL OUR PRODUCTS IN
FOREIGN MARKETS.

The introduction of our products in foreign markets has subjected and will
continue to subject us to foreign regulatory clearances, which may be
unpredictable and uncertain, and which may impose substantial additional costs
and burdens. Many countries also impose product standards, packaging
requirements, labeling requirements and import restrictions on devices. We
cannot give you any assurance that any of our products will receive further
approvals or clearances, if required on a timely basis, or at all.

OUR ABILITY TO COMPETE SUCCESSFULLY MAY DEPEND, IN PART, ON OUR ABILITY TO
OBTAIN AND PROTECT PATENTS, PROTECT TRADE SECRETS AND OPERATE WITHOUT INFRINGING
THE PROPRIETARY RIGHTS OF OTHERS.

Certain robotic medical technology underlying our products is the subject of a
United States patent issued to IBM, which IBM has agreed not to enforce against
the manufacture and sale of our products. We have been issued four U.S. patents
and filed seven patent applications covering various aspects of our technology.

Our U.S. patents include

          - Computer assisted software system for planning and performing hip
            revision surgery

          - Computer assisted system and method for creating cavities in the
            femur that will accept a prosthesis

          - Computer system and method for creating a pre-operative surgical
            plan for hip replacement surgery

          - Method for orienting real patient anatomy to a digital image of the
            patient's anatomy

We cannot give you any assurance that our pending or future patent applications
will mature into issued patents, or that we will continue to develop our own
patentable technologies. Further, we cannot give you any assurance that any
patents that may be issued to us effectively protect our technology or provide a

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competitive advantage for our products or will not be challenged, invalidated,
or circumvented in the future. In addition, we cannot give you any assurance
that competitors, many of which have substantially more resources than us and
have made substantial investments in competing technologies, will not obtain
patents that will prevent, limit or interfere with our ability to make, use or
sell our products either in the United States or internationally.

The medical device industry has been characterized by substantial competition
and litigation regarding patent and other proprietary rights. We intend to
vigorously protect and defend our patents and other proprietary rights relating
to our proprietary technology. Litigation alleging infringement claims against
us (with or without merit), or instituted by us to enforce patents and to
protect trade secrets or know-how owned by us or to determine the
enforceability, scope and validity of the proprietary rights of others, is
costly and time consuming. If any relevant claims of third-party patents are
upheld as valid and enforceable in any litigation or administrative proceedings,
we could be prevented from practicing the subject matter claimed in such
patents, or could be required to obtain licenses from the patent owners of each
patent, or to redesign our products or processes to avoid infringement. We
cannot give you any assurance that such licenses would be available or, if
available, would be available on terms acceptable to us or that we would be
successful in any attempt to redesign our products or processes to avoid
infringement. Accordingly, an adverse determination in a judicial or
administrative proceeding or failure to obtain necessary licenses could prevent
us from manufacturing and selling our products, which would have a material
adverse effect on our business, financial condition and results of operations.

OUR PRODUCTION EXPERIENCE IS LIMITED.

Our success will depends in part on our ability to assemble our products in a
timely, cost-effective manner and in compliance with good manufacturing
practices, and manufacturing requirements of other countries, including the
International Standards Organization 9000 standards and other regulatory
requirements. The assembly of our products is a complex operation involving a
number of separate processes and components. Our production activities to date
have consisted primarily of assembling limited quantities of systems for use in
clinical trials and systems for commercial sale. We do not have experience in
assembling our products in larger commercial quantities. Furthermore, as a
condition to receipt of pre-market approval, our facilities, procedures and
practices will be subject to pre-approval and ongoing good manufacturing
practices inspections by the FDA.

Manufacturers often encounter difficulties in scaling up manufacturing of new
products, including problems involving product yields, quality control and
assurance, component and service availability, adequacy of control policies and
procedures, lack of qualified personnel, compliance with FDA regulations, and
the need for further FDA approval of new manufacturing processes and facilities.
We cannot give you any assurance that production yields, costs or quality will
not be adversely affected as we seek to increase production, and any such
adverse effect could have a material adverse effect on our business, financial
condition and results of operations.

WE ARE DEPENDENT ON OUR SUPPLIER OF ROBOTS.

Although we have multiple sources for most of our components, parts and
assemblies used in the ROBODOC and NeuroMate Systems, we are dependent on Sankyo
Seiki of Japan for the ROBODOC System robot arm and Audemars-Piguet of
Switzerland for the supply of the customized NeuroMate robot. Although we
believe we can obtain a robot arm for either the ROBODOC System or the NeuroMate
System from other suppliers, with appropriate modifications and engineering
effort, we cannot give you any assurance that delays resulting from the required
modifications or engineering effort to adapt alternative components would not
have a material adverse effect on our business, financial condition and results
of operations.

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<PAGE>   9

WE ARE DEPENDENT ON FOREIGN SALES.

Since we commenced operations, substantially all of our sales have been to
customers in Germany, Austria, France and Japan. We believe that until such
time, if ever, as we receive approval from the FDA to market the ROBODOC System
in the United States, substantially all of our sales for the ROBODOC System will
be derived from customers in foreign markets. Foreign sales are subject to
certain risks, including economic or political instability, shipping delays,
fluctuations in foreign currency exchange rates, changes in regulatory
requirements, custom duties and export quotas and other trade restrictions, any
of which could have a material adverse effect on our business. To date, payment
for substantially all ROBODOC Systems in Europe has been fixed in U.S. Dollars.
However, we cannot give you any assurance that in the future customers will be
willing to make payment for our products in U.S. Dollars. If the U.S. Dollar
strengthens substantially against the foreign currency of a country in which we
sell our products, the cost of purchasing our products in U.S. Dollars would
increase and may inhibit purchases of our products by customers in that country.
We are unable to predict the nature of future changes in foreign markets or the
effect, if any, they might have on us.

LENGTHY SALES CYCLE MAY CAUSE US TO RECOGNIZE THE SALES PRICE OF A SYSTEM IN A
SUBSEQUENT FISCAL QUARTER TO THE FISCAL QUARTER IN WHICH WE INCURRED RELATED
MARKETING AND SALES EXPENSES.

Since the purchase of a ROBODOC System or NeuroMate System represents a
significant capital expenditure for a customer, the placement of orders may be
delayed due to customers' internal procedures to approve large capital
expenditures. We anticipate that the period between initial contact of a
customer for a system and submission of a purchase order by that customer could
be as long as 9 to 12 months. Furthermore, the current lead time required by the
supplier of the robot for either the ROBODOC System or the NeuroMate System is
approximately four months after receipt of the order. We may be required to
expend significant cash resources to fund our operations until the purchase
price is paid. Accordingly, we may not recognize the sales price of a system
until a fiscal quarter subsequent to the fiscal quarter in which we incurred
marketing and sales expenses associated with an order.

WE ARE SUBJECT TO PRODUCT LIABILITY CLAIMS.

The manufacture and sale of medical products exposes us to the risk of
significant damages from product liability claims. Although we maintain product
liability insurance against product liability claims in the amount of $5 million
per occurrence and $5 million in aggregate, we cannot give you any assurance
that the coverage limits of our insurance policies will be adequate or that such
insurance can be maintained at acceptable costs. Although we have not
experienced any product liability claims to date, a successful claim brought
against us in excess of our insurance coverage could have a materially adverse
effect on our business, financial condition and results of operations.

WE MAY NOT BE ABLE TO RETAIN OUR KEY PERSONNEL OR HIRE THE ADDITIONAL PERSONNEL
WE NEED TO SUCCEED.

Our growth and future success also will depend in large part on the continued
contributions of key technical and senior management personnel, as well as our
ability to attract, motivate and retain highly qualified personnel generally
and, in particular, trained and experienced professionals capable of developing,
selling and installing the Systems and training surgeons in their use.
Competition for such personnel is intense, and we cannot give you any assurance
that we will be successful in hiring, motivating or retaining such qualified
personnel. None of our executive or key technical personnel is employed pursuant
to an employment agreement. The loss of the services of senior management or key
technical personnel, or the inability to hire or retain qualified personnel,
could have a material adverse effect on our business, financial condition and
results of operations.

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WE MAY NEED ADDITIONAL FINANCING FOR OUR OPERATIONS.

We may need additional financing since our available cash resources, together
with anticipated cash flows from operations, may not be sufficient to continue
our operations at current levels. Additional financing, if required, may not be
available on acceptable terms, if at all. If we are unable to obtain financing
on favorable terms, we may have to reduce operations, defer research and
development projects and reduce staffing.

ADDITIONAL FINANCING FOR OUR OPERATIONS COULD ADVERSELY AFFECT HOLDERS OF OUR
COMMON STOCK.

We may issue common stock or debt or equity securities convertible into shares
of common stock to obtain additional financing if required. Any additional
financing may result in substantial dilution to current holders of our common
stock.

CONVERSION OF OUR PREFERRED STOCK AND SUBSEQUENT PUBLIC SALE OF OUR COMMON STOCK
WHILE ITS MARKET PRICE IS DECLINING MAY RESULT IN FURTHER DECREASES IN ITS
PRICE.

As of February 9, 2000, we had outstanding 2,785 shares of convertible preferred
stock. Each share of preferred stock has a stated value of $1,000 per share and
is convertible into common stock at a conversion price equal to 85% of the
lowest sale price of the common stock on the Nasdaq SmallCap Market over the
five trading days preceding the date of conversion. The number of shares of
common stock that may be acquired upon conversion is determined by dividing the
stated value of the number of shares of preferred stock to be converted by the
conversion price, subject to a maximum conversion price of $1.22. Since there is
no minimum conversion price, there is no limit on the number of shares of common
stock that holders of preferred stock may acquire upon conversion. For
additional information concerning our outstanding preferred stock, see
"Preferred Stock Financings." Holders of our preferred stock may sell at market
price the shares of common stock they have acquired upon conversion at a 15%
discount to prevailing market prices concurrently with, or shortly after,
conversion, realizing a profit equal to the difference between the market price
and the discounted conversion price. The holders of the preferred stock also
could engage in short sales of our common stock, after delivering a notice of
conversion to us, which could contribute to a decline in the market price of the
common stock and give them the opportunity to profit from that decrease by
covering their short position with shares acquired upon conversion at a 15%
discount to the prevailing market price. The conversion of the preferred stock
and subsequent sale of a large number of shares of common stock acquired upon
conversion during periods when the market price of the common stock declines, or
the possibility of such conversions and sales, may exacerbate the decline or
impede increases in the market price of the common stock.

OTHER ISSUANCES OF PREFERRED STOCK COULD ADVERSELY AFFECT EXISTING HOLDERS OF
OUR COMMON STOCK.

Under our certificate of incorporation, our Board of Directors may, without
further stockholder approval, issue up to an additional 987,730 shares of
preferred stock with dividend, liquidation, conversion, voting or other rights
that could adversely affect the voting power or other rights of the holders of
common stock. We could use new classes of preferred stock as a method of
discouraging, delaying or preventing a change in persons that control us. In
particular, the terms of the preferred stock could effectively restrict our
ability to consummate a merger, reorganization, sale of all or substantially all
of our assets, liquidation or other extraordinary corporate transaction without
the approval of the holders of the preferred stock. We could also create a class
of preferred stock with rights and preferences similar to those of our
outstanding convertible preferred stock, which could result in substantial
dilution to holders of our common stock or adversely affect its market price.

                                        7
<PAGE>   11

CONVERSION OF OUR OUTSTANDING PREFERRED STOCK AND THE EXERCISE OF OUR
OUTSTANDING WARRANTS AND STOCK OPTIONS AND SUBSEQUENT PUBLIC SALE OF OUR COMMON
STOCK WILL RESULT IN SUBSTANTIAL DILUTION TO EXISTING STOCKHOLDERS.

As of February 9, 2000, we had outstanding 15,138,345 shares of common stock. In
addition,

     - an indeterminate number of shares may be acquired upon conversion of our
       outstanding preferred stock since there is no minimum conversion price.
       2,282,787 shares or approximately 15% of the 15,138,345 shares
       outstanding as of February 9, 2000 may be acquired upon conversion at an
       assumed conversion price of $1.22 per share, the maximum conversion price
       of our outstanding preferred stock. The number of shares that the holders
       of the preferred stock may acquire upon conversion will increase as the
       market price of the common stock declines below that assumed price. At an
       assumed conversion price of $1.00 per share, holders of preferred stock
       could acquire 2,785,000 shares of common stock, or approximately 18% of
       the 15,138,345 shares outstanding as of February 9, 2000.

     - 18,964,147 shares may be acquired upon exercise of outstanding warrants.

     - 1,277,490 shares may be acquired upon exercise of outstanding stock
       options.

Existing stockholders will experience substantial dilution in their percentage
ownership of our common stock if the preferred stock is converted and warrants
and stock options are exercised. If all of the outstanding preferred stock is
converted at an assumed conversion price of $1.22 per share, and all outstanding
warrants and stock options are exercised, the number of outstanding shares of
common stock will increase by 22,524,424, representing approximately 149% of the
outstanding common stock as of February 9, 2000.

SALES OF SUBSTANTIAL AMOUNTS OF OUR COMMON STOCK, OR THE POSSIBILITY OF SUCH
SALES, MAY HAVE AN ADVERSE EFFECT ON THE MARKET PRICE OF OUR COMMON STOCK AND
IMPAIR OUR ABILITY TO RAISE CAPITAL THROUGH AN OFFERING OF EQUITY SECURITIES IN
THE FUTURE.

As of February 9, 2000, there were 15,138,345 shares of common stock
outstanding. Except for 3,962,188 shares of common stock (representing
approximately 26% of the outstanding common stock), substantially all of the
outstanding shares of common stock are transferable without restriction under
the Securities Act. In addition,

     -  an indeterminate number of shares may be acquired upon conversion of our
        outstanding preferred stock since there is no minimum conversion price.
        At an assumed conversion price of $1.22 per share, holders of our
        outstanding preferred stock could acquire 2,282,787 shares of common
        stock. The number of shares that may be acquired upon conversion will
        increase if the market price of the common stock declines below the
        assumed conversion price.

     -  2,274,066 shares may be acquired upon exercise of warrants owned by IBM
        at exercise prices ranging from $.01 to $.07.

     -  3,994,345 shares may be acquired upon exercise of warrants issued in our
        initial public offering at an exercise price of $2.86.

     -  11,700,000 shares may be acquired upon exercise of warrants at an
        exercise price of $1.02656.

     -  995,736 shares may be acquired upon exercise of warrants having exercise
        prices ranging from $2.00 to $4.39 per share.

     -  1,277,490 shares may be acquired upon exercise of stock options granted
        pursuant to our stock option plans at exercise prices ranging from $.07
        to $8.62 per share.

Substantially all of such shares, when issued, may be immediately resold in the
public market pursuant to effective registration statements under the Securities
Act or pursuant to Rule 144.

                                        8
<PAGE>   12

We have granted registration rights to:

     -  ILTAG International Licensing Holding S.A.L., Bernd Herrmann, Urs
        Wettstein, IBM, EJ Financial Investments V,L.P. and certain other
        institutional investors owning or having the right to acquire 18,238,861
        shares of common stock.

     -  holders of warrants to purchase 341,010 shares of common stock issued in
        connection with our European offering in November 1997 for those shares.

     -  holders of warrants to purchase 55,481 shares of common stock have
        piggyback registration rights for those shares.

If our securityholders sell publicly a substantial number of shares issued on
the exercise of outstanding options and warrants or on the conversion of our
preferred stock, then the market price of our common stock may decline. Public
perception that those sales will occur may also adversely affect the price of
our common stock. Furthermore, the existence of securities of this type may
exert downward pressure on an issuer's stock price. A decline in the price of
our common stock may also impair our ability to raise capital through the sale
of equity securities.

IF WE CANNOT SATISFY NASDAQ'S MAINTENANCE REQUIREMENTS, IT MAY DELIST OUR COMMON
STOCK FROM ITS SMALLCAP MARKET.

Our common stock is quoted on the Nasdaq SmallCap Market. To continue to be
listed, we are required to maintain net tangible assets of $2,000,000 and our
common stock must maintain a minimum bid price of $1.00 per share. We may not be
able to continue to satisfy those requirements.

The conversion of our convertible preferred stock may have consequences that
could cause Nasdaq to delist our common stock. The conversion of our preferred
stock and resale of the common stock acquired upon conversion, or the
possibility of the conversion of our preferred stock and resale of our common
stock, may depress or inhibit increases in the market price of our common stock.
As a result, the minimum bid price for our common stock may decline below $1.00.
Nasdaq also may delist our common stock if it deems it necessary to protect
investors and the public interest. If Nasdaq determines that the returns on our
convertible preferred stock are excessive compared with the returns received by
the holders of our common stock, and those excess returns were egregious, Nasdaq
could delist our common stock.

If we are unable to satisfy Nasdaq's maintenance requirements, our common stock
may be delisted. If we are delisted and we are not then listed or do not qualify
for a listing on a stock exchange, our common stock would be traded in the
over-the-counter market and quoted in the NASD's "Electronic Bulletin Board" or
the "pink sheets." Consequently, it may be more difficult for an investor to
obtain price quotations for our common stock or to sell it.

IF OUR COMMON STOCK IS DELISTED, IT MAY BECOME SUBJECT TO THE SEC'S "PENNY
STOCK" RULES AND MORE DIFFICULT TO SELL.

SEC rules require brokers to provide information to purchasers of securities
traded at less than $5.00 and not traded on a national securities exchange or
quoted on the Nasdaq Stock Market. If our common stock becomes a "penny stock"
that is not exempt from the SEC rules, these disclosure requirements may have
the effect of reducing trading activity in our common stock and make it more
difficult for investors to sell. The rules require a broker-dealer to deliver a
standardized risk disclosure document prepared by the SEC that provides
information about penny stocks and the nature and level of risks in the penny
market. The broker must also give bid and offer quotations and broker and
salesperson compensation information to the customer orally or in writing before
or with his confirmation. The SEC rules also require a broker to make a special
written determination that the penny stock is a suitable investment for the
purchaser and receive the purchaser's written agreement to the transaction
before a transaction in a penny stock.

                                        9
<PAGE>   13

                           FORWARD LOOKING STATEMENTS

Some of the information in this prospectus and the documents we incorporate by
reference may contain forward-looking statements. Such statements can be
identified by the use of forward-looking terminology such as "may," "will,"
"expect," "believe," "intend," "anticipate," "estimate," "continue" or similar
words. These statements discuss future expectations, estimate the happening of
future events or our financial condition or state other "forward-looking"
information. When considering such forward-looking statements, you should keep
in mind the risk factors and other cautionary statements in this prospectus and
the documents that we incorporate by reference. The risk factors discussed in
this prospectus and other factors noted throughout this prospectus, including
certain risks and uncertainties, could cause our actual results to differ
materially from those contained in any forward-looking statement.

                                       10
<PAGE>   14

                            SELLING SECURITYHOLDERS

The table below sets forth the name and address of each selling securityholder,
the number of shares of common stock beneficially owned by each securityholder
as of February 9, 2000, the number of shares that each selling securityholder
may offer, and the number of shares of common stock beneficially owned by each
selling securityholder upon completion of this offering, assuming all of the
shares offered are sold. None of the selling securityholder has, or within the
past three years has had, any position, office or other material relationship
with us or any of our predecessors or affiliates.

The number of shares listed below as beneficially owned before the offering by
each selling securityholder owning series F preferred stock has been computed,
without giving effect to the terms of the certificate of designations for the
series F preferred stock, which provides that the number of shares that the
selling securityholders may acquire upon conversion may not exceed that number
which would render a selling securityholder the beneficial owner of more than
five percent of the then issued and outstanding shares of common stock, or
result in the issuance of more than an aggregate of 2,996,218 shares upon
conversion of the series F preferred stock, on the date that series of preferred
stock was issued.

On February 9, 2000, we had 15,138,345 shares of common stock outstanding. For
purposes of computing the number and percentage of shares beneficially owned by
a selling securityholder on February 9, 2000, any shares which such person has
the right to acquire within 60 days after such date are deemed to be
outstanding, but those shares are not deemed to be outstanding for the purpose
of computing the percentage ownership of any other selling securityholder.

<TABLE>
<CAPTION>
                                            SHARES OF                               SHARES OF
                                           COMMON STOCK                            COMMON STOCK
                                           OWNED BEFORE         SHARES OF       BENEFICIALLY OWNED
                                           OFFERING(1)         COMMON STOCK       AFTER OFFERING
NAME AND ADDRESS OF                     ------------------    OFFERED IN THE    ------------------
SELLING SECURITYHOLDER                  NUMBER     PERCENT     OFFERING(2)      NUMBER     PERCENT
- ----------------------                  -------    -------    --------------    -------    -------
<S>                                     <C>        <C>        <C>               <C>        <C>
Holder of series F preferred stock and
  warrants:
Roseworth Group, Inc.(3)..............  717,188     4.52%        717,188              0       --
Aeulestrasse 74, Postfach 86
Vaduz
Furstentum Liechtenstein 9790
Endeavour Management, Inc.(4).........  956,250     5.94%        956,250              0       --
14-14 Divrei Chaim Street
Jerusalem, Israel
Delta Capital Partners(5).............  451,562     2.90%        451,562              0       --
60 Market Square
Belize City, Belize
</TABLE>

                                       11
<PAGE>   15

- -------------------------

   * Less than one percent (1%).

 (1) The information presented in the table does not give effect to the terms of
     the certificate of designations for the preferred stock and the warrants
     that limit the number of shares that a holder may acquire upon conversion
     or exercise of these securities to 5% of the then issued and outstanding
     shares of common stock.

 (2) Represents the number of shares that the selling securityholder may acquire
     upon exercise of warrants to purchase common stock and conversion of the
     series F preferred stock at an assumed conversion price of $1.00 per share.
     The actual conversion price is 85% of the lowest sale price of a share of
     common stock for the five trading days preceding the date of conversion.
     The number of shares of common stock that the selling securityholder may
     acquire upon conversion is equal to the number of shares of preferred stock
     to be converted times $1,000, the stated value of each share of preferred
     stock, divided by the conversion price. The maximum conversion price of the
     series F preferred stock is $1.22. Since there is no minimum conversion
     price, if the market price of the common stock declines below the assumed
     conversion price, the number of shares that the selling securityholder may
     acquire upon conversion will increase. If following a sustained increase in
     the market price of the common stock sufficient to offset the 15% discount
     used in computing the conversion price the conversion price is higher than
     the assumed conversion price, the number of shares that the selling
     securityholder may acquire will decrease.

 (3) Neil Galloway has voting and dispositive power with respect to shares owned
     by Roseworth Group, Inc..

 (4) Shmuli Margulies, director of Endeavor Management, Inc., has sole voting
     and dispositive power with respect to shares owned by that fund.

 (5) Jacques Tizabi and Ali Moussavi of Astor Capital, investment advisor for
     Delta Capital Partners, share voting and dispositive power with respect to
     shares owned by Delta Capital Partners.

We are registering the shares for resale by the selling securityholders in
accordance with registration rights granted to the selling securityholders. We
will pay the registration and filing fees, printing expenses, listing fees, blue
sky fees, if any, and fees and disbursements of our counsel in connection with
this offering, but the selling securityholders will pay any underwriting
discounts, selling commissions and similar expenses relating to the sale of the
shares, as well as the fees and expenses of their counsel. In addition, we have
agreed to indemnify the selling securityholders, underwriters who may be
selected by the selling securityholders and certain affiliated parties, against
certain liabilities, including liabilities under the Securities Act, in
connection with the offering. The selling securityholders may agree to indemnify
any agent, dealer or broker-dealer that participates in transactions involving
sales of the shares against certain liabilities, including liabilities under the
Securities Act. The selling securityholders have agreed to indemnify us and our
directors and officers, as well as any person controlling the company, against
certain liabilities, including liabilities under the Securities Act. Insofar as
indemnification for liabilities under the Securities Act may be permitted to our
directors or officers, or persons controlling the company, we have been informed
that in the opinion of the SEC such indemnification is against public policy as
expressed in the Securities Act and is therefore unenforceable.

                                       12
<PAGE>   16

                              PLAN OF DISTRIBUTION

The selling securityholders may sell shares from time to time in public
transactions, on or off The Nasdaq SmallCap Market, or private transactions, at
prevailing market prices or at privately negotiated prices. They may sell their
shares in the following types of transactions:

     - ordinary brokerage transactions and transactions in which the broker
       solicits purchasers;

     - a block trade in which the broker-dealer so engaged will attempt to sell
       the shares as agent but may position and resell a portion of the block as
       principal to facilitate the transaction;

     - purchases by a broker or dealer as principal and resale by such broker or
       dealer for its account pursuant to this prospectus; and

     - face-to-face transactions between sellers and purchasers without a
       broker-dealer.

The selling securityholders also may sell shares that qualify under Section 4(1)
of the Securities Act or Rule 144. As used in this prospectus, selling
securityholders include donees, pledgees, distributees, transferees and other
successors-in-interest of the selling securityholders named in this prospectus.

In effecting sales, brokers or dealers engaged by the selling securityholders
may arrange for other brokers or dealers to participate in the resales. The
selling securityholders may enter into hedging transactions with broker-dealers,
and in connection with those transactions, broker-dealers may engage in short
sales of the shares. The selling securityholders also may sell shares short and
deliver the shares to close out such short positions, except that the selling
securityholders have agreed that they will not enter into any put option or
short position with respect to the common stock prior to the date of the
delivery of a conversion notice. The selling securityholders also may enter into
option or other transactions with broker-dealers which require the delivery to
the broker-dealer of the shares, which the broker-dealer may resell under this
prospectus. The selling securityholders also may pledge the shares to a broker
or dealer and upon a default, the broker or dealer may effect sales of the
pledged shares under this prospectus.

Brokers, dealers or agents may receive compensation in the form of commissions,
discounts or concessions from selling securityholders in amounts to be
negotiated in connection with the sale. The selling securityholders and any
participating brokers or dealers may be deemed to be "underwriters" within the
meaning of the Securities Act in connection with such sales and any such
commission, discount or concession may be deemed to be underwriting
compensation.

Information as to whether underwriters who may be selected by the selling
securityholders, or any other broker-dealer, is acting as principal or agent for
the selling securityholders, the compensation to be received by them, and the
compensation to be received by other broker-dealers, in the event such
compensation is in excess of usual and customary commissions, will, to the
extent required, be set forth in a supplement to this prospectus. Any dealer or
broker participating in any distribution of the shares may be required to
deliver a copy of this prospectus, including a prospectus supplement, if any, to
any person who purchases any of the shares from or through such dealer or
broker.

We have advised the selling securityholders that during such time as they may be
engaged in a distribution of the shares they are required to comply with
Regulation M promulgated under the Securities Exchange Act. With certain
exceptions, Regulation M precludes any selling securityholder, any affiliated
purchasers and any broker-dealer or other person who participates in such
distribution from bidding for or purchasing, or attempting to induce any person
to bid for or purchase any security which is the subject of the distribution
until the entire distribution is complete. Regulation M also prohibits any bids
or purchases made in order to stabilize the price of a security in connection
with the distribution of that security.

                                       13
<PAGE>   17

              INFORMATION ABOUT INTEGRATED SURGICAL SYSTEMS, INC.

We develop, assemble, market and service image-directed, computer-controlled
robotic products for orthopaedic and neurosurgical applications. Our principal
orthopaedic product is the ROBODOC(R) Surgical Assistant System, consisting of a
computer-controlled surgical robot and our ORTHODOC(R) Presurgical Planner, and
our principal neurosurgical product is the NeuroMate System.(TM)

                              RECENT DEVELOPMENTS

CHANGE IN CONTROL

On December 14, 1999 we issued and sold to ILTAG International Licensing Holding
S.A.L., Bernd Herrmann and Urs Wettstein an aggregate of 2,922,396 shares of
common stock and three-year warrants to purchase an additional 11,700,000 shares
of common stock under a Stock and Warrant Purchase Agreement dated as of October
1, 1999. The purchase price for the shares and warrants was $4 million. The
exercise price of the warrants is $1.02656 per share.

ILTAG is a Lebanese company that invests in health care and information
technology companies. ILTAG's corporate parent, The Dogmoch Group of Companies,
provides consulting and support services to over 20 German companies doing
business in countries throughout the Middle East. Bernd Herrmann is a German
venture capitalist who was an asset manager at Deutsche Bank A.G. and
Commerzbank A.G. Urs Wettstein is a Swiss tax and accounting consultant.

We experienced a change in control as a result of the sale. The actual and
beneficial ownership of common stock of ILTAG/Dogmoch, Messrs. Herrmann and
Wettstein as of February 9, 2000, when we had 15,138,345 shares of common stock
outstanding, were as follows:

<TABLE>
<CAPTION>
                                    ACTUAL OWNERSHIP OF
                              --------------------------------    BENEFICIAL OWNERSHIP
                                 COMMON STOCK        WARRANTS        OF COMMON STOCK
                              -------------------   ----------    ---------------------
                              NUMBER OF                           NUMBER OF
                               SHARES     PERCENT                   SHARES     PERCENT
                              ---------   -------                 ---------    -------
<S>                           <C>         <C>       <C>           <C>          <C>
ILTAG/Dogmoch...............  1,461,198    9.65%     5,850,000    7,311,198     34.84%
Bernd Herrmann..............   730,599     4.83%     2,925,000    3,655,599     20.24%
Urs Wettstein...............   730,599     4.83%     2,925,000    3,655,599     20.24%
</TABLE>

As a condition of the sale, James C. McGroddy, Paul A.H. Pankow, Gerald D.
Knudson and Patrick G. Hays resigned from the Board immediately prior to the
closing of the sale, and were replaced by Messrs. Herrmann, Wettstein and Falah
Al-Kadi, the Vice Chairman of Dogmoch. Dr. John N. Kapoor continues to serve as
a director and Dr. Ramesh C. Trivedi was appointed to fill the remaining vacancy
on the Board.

DISTRIBUTION AGREEMENT

We have entered into a distribution agreement with Spark 1st Vision GmbH & Co.
KG, a German company, that gives the distributor the exclusive right to
distribute our products in Europe, the Middle East and Africa through 2003. The
distributor is obligated to purchase a minimum of 24 ROBODOC systems during 2000
and 32 ROBODOC systems during 2001. The distributor is required to pay us
advance payments of $200,000 per month for the first six months of 2000,
$300,000 per month for the remainder of 2000, and $400,000 per month for 2001,
to be applied as a credit against the purchase price of products purchased.
However, the distributor will have no minimum purchase or advance payment
obligation after 2001, even though it will retain exclusive rights to distribute
our products in Europe, the Middle East and Africa through 2003. The
distributor's only obligation to us after 2001 is to pay for products that it
purchases. The distributor's liability to us under the distribution agreement is
limited to $1 million, exclusive of the minimum purchase obligation. We will
continue to receive service contract revenues and bear the cost of

                                       14
<PAGE>   18

maintenance, training and customer support. Our European sales and marketing
personnel, as well as our European field support staff, have joined the
distributor.

The distribution agreement will eliminate marketing, sales and administrative
expenses associated with our European activities and provide us with a more
predictable source of revenues based upon the minimum purchase commitments of
the distributor.

                           PREFERRED STOCK FINANCINGS

Since September 1998, we have received aggregate net proceeds of approximately
$11.4 million from the sale of six series of our convertible preferred stock.
Information concerning these preferred stock financings is set forth below.

<TABLE>
<CAPTION>
                               SHARES OF
                               PREFERRED
                                 STOCK           WARRANTS           GROSS
SERIES     DATE OF SALE          SOLD             ISSUED          PROCEEDS
- ------     ------------        ---------         --------         --------
<C>     <S>                 <C>               <C>               <C>
  A     September 10, 1998         3,520              44,000      $3,520,000
  B     March 26, 1999             1,000              12,500      1,000,000
  C     June 10, 1999                750               9,375        750,000
  D     June 30, 1999              2,000              25,000      2,000,000
  E     July 30, 1999              3,000              37,500      3,000,000
  F     February 8, 2000           2,000             125,000      2,000,000
</TABLE>

Each series of preferred stock has a stated value of $1,000 per share and is
convertible into common stock at a conversion price equal to 85% of the lowest
sale price of the common stock on the Nasdaq SmallCap Market over the five
trading days preceding the date of conversion subject to a maximum conversion
price. The number of shares of common stock that may be acquired upon conversion
is determined by dividing the stated value of the number of shares of preferred
stock to be converted by the conversion price. As of February 9, 2000, 785
shares of series D preferred stock and 2,000 shares of series F preferred stock
were outstanding. No other shares of preferred stock are outstanding. On
February 7, 2000 we redeemed the 1,085 shares of series E preferred stock
outstanding for a total redemption price of $1,085,000, or $1,000 per share, the
stated value of a share of series E preferred stock.

The maximum conversion price for the series D and series F preferred stock is
$1.22 per share.
There is no minimum conversion price for any series of preferred stock.
Consequently, there is no limit on the number of shares of common stock that may
be issued upon conversion, except that the terms of each series, set forth in
the certificate of designations for that series, limit:

- - The number of shares of common stock that a holder of preferred stock may
  acquire upon conversion, together with shares beneficially owned by the holder
  and its affiliates, to five percent (5%) of the total outstanding shares of
  common stock.

- - The number of shares of common stock that the holders of a series of preferred
  stock may acquire upon conversion to that number of shares representing 19.9%
  of the shares outstanding on the date upon which that series was issued, until
  stockholders approve the issuance upon conversion of shares in excess of that
  number of shares. This limitation is required by the rules of The Nasdaq Stock
  Market, Inc.

The number of shares of common stock issued upon conversion of each series of
preferred stock as of February 9, 2000 was as follows: series A -- 2,867,135;
series B -- 459,831; series C -- 563,497; series D -- 961,759; series
E -- 1,490,101; series F: none. The average actual conversion price for shares
of each series of preferred stock converted into shares of common stock as of
February 9,

                                       15
<PAGE>   19

2000 was as follows: series A -- $2.23; Series B -- $2.17; Series C -- $1.33;
Series D -- $1.26; Series E -- $1.22.

The number of shares of common stock that may be acquired upon conversion of the
outstanding shares of preferred stock as of February 9, 2000, based upon an
assumed conversion prices of $1.22, the maximum conversion price, is as follows:
Series D -- 643,443; Series F -- 1,639,345.

The market price of the common stock on the date of issue of each series of
preferred stock was as follows: series A -- $3.563; series B -- $1.969; series
C -- $1.813; series D -- $2.969; series E -- $3.50; series F -- 2,375.

The conversion price of each series of preferred stock on the date of issue
would have been as follows: series A -- $2.763; series B -- $1.488; series
C -- $1.408; series D -- $2.231; series E -- $2.869; series F -- $1.22. The
number of shares of common stock into which the preferred stock would have been
convertible on the date of issue would have been as follows: series
A -- 1,274,000; series B -- 672,000; series C -- 533,000; series D -- 896,000;
series E -- 1,046,000; series F -- 1,639,345.

                      WHERE YOU CAN FIND MORE INFORMATION

We file reports, proxy statements and other information with the SEC. You may
read and copy any document we file at the Public Reference Room of the SEC at
Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549 and at the
Regional Offices of the SEC at Seven World Trade Center, Suite 1300, New York,
New York 10048 and at 500 West Madison Street, Suite 1400, Chicago, Illinois
60661-2511. Please call 1-800-SEC-0330 for further information concerning the
Public Reference Room. Our filings also are available to the public from the
SEC's website at www.sec.gov. We distribute to our stockholders annual reports
containing audited financial statements.

                     INFORMATION INCORPORATED BY REFERENCE

The SEC allows us to "incorporate by reference" the information we file with it,
which means that we can disclose important information to you by referring to
those documents. The information incorporated by reference is considered to be
part of this prospectus, and information we file later with the SEC will
automatically update and supersede this information. We incorporate by reference
the documents listed below and any future filings we make with the SEC under
Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act until the
offering is completed:

     1.  Annual Report on Form 10-KSB for the fiscal year ended December 31,
         1998, including any amendments to that report.

     2.  Proxy Statements dated March 27, 1999 and October 5, 1999.

     3.  Quarterly Reports on Form 10-QSB for the fiscal quarters ended March
         31, 1999, June 30, 1999 and September 30, 1999, including any
         amendments to that report.

     4.  Current Report on Form 8-K dated April 28, 1999 and December 14, 1999,
         including any amendments to those reports.

     5.  The description of the common stock contained in our Registration
         Statement on Form 8-A (File No. 1-12471) under Section 12 of the
         Securities Exchange Act.

                                       16
<PAGE>   20

You may request a copy of these filings, at no cost, by writing or calling us
at:

                          INTEGRATED SURGICAL SYSTEMS
                            1850 Research Park Drive
                          Davis, California 95616-4884
                         Attention: Corporate Secretary
                           Telephone: (530) 792-2600

                                       17
<PAGE>   21

                                 LEGAL MATTERS

The validity of the shares of common stock offered hereby has been passed upon
by Snow Becker Krauss P.C., 605 Third Avenue, New York, New York 10158.

                                    EXPERTS

Ernst & Young LLP, independent auditors, have audited our consolidated financial
statements included in our Annual Report on Form 10-KSB for the year ended
December 31, 1998 and our Proxy Statement dated October 5, 1999, as set forth in
their reports, which are incorporated by reference in this prospectus and
elsewhere in the registration statement. Our consolidated financial statements
are incorporated by reference in reliance on Ernst & Young LLP's reports, given
on their authority as experts in accounting and auditing.

                                       18
<PAGE>   22

                                    PART II

                   INFORMATION NOT REQUIRED IN THE PROSPECTUS

ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

The expenses payable by the Company in connection with the issuance and
distribution of the securities being registered are estimated below:

<TABLE>
<S>                                                             <C>
SEC registration fee........................................    $ 1,262.25
Listing fees................................................      7,500.00
Legal fees and expenses.....................................     10,000.00
Printing expenses...........................................      5,000.00
Accounting fees.............................................      2,500.00
Miscellaneous...............................................        737.75
                                                                ----------
          Total.............................................    $27,000.00
                                                                ==========
</TABLE>

ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS

Article VI of the Registrant's by-laws provides that a director or officer shall
be indemnified against expenses (including attorneys' fees), judgments, fines
and amounts paid in settlement (provided such settlement is approved in advance
by the Registrant) in connection with certain actions, suits or proceedings,
whether civil, criminal, administrative or investigative (other than an action
by or in the right of the corporation -- a "derivative action") if he acted in
good faith and in a manner he reasonably believed to be in or not opposed to the
best interests of the corporation, and, with respect to any criminal action or
proceeding, had no reasonable cause to believe his conduct was unlawful. A
similar standard of care is applicable in the case of derivative actions, except
that indemnification only extends to expenses (including attorneys' fees)
incurred in connection with the defense or settlement of such an action, except
that no person who has been adjudged to be liable to the Registrant shall be
entitled to indemnification unless a court determines that despite such
adjudication of liability but in view of all of the circumstances of the case,
the person seeking indemnification is fairly and reasonably entitled to be
indemnified for such expenses as the court deems proper.

Article 6.5 of the Registrant's by-laws further provides that directors and
officers are entitled to be paid by the Registrant the expenses incurred in
defending the proceedings specified above in advance of their final disposition.
provided that such payment will only be made upon delivery to the Registrant by
the indemnified party of an undertaking to repay all amounts so advanced if it
is ultimately determined that the person receiving such payments is not entitled
to be indemnified.

Article 6.4 of the Registrant's by-laws provides that a person indemnified under
Article VI of the by-laws may contest any determination that a director,
officer, employee or agent has not met the applicable standard of conduct set
forth in the by-laws by petitioning a court of competent jurisdiction.

Article 6.6 of the Registrant's by-laws provides that the right to
indemnification and the payment of expenses incurred in defending a proceeding
in advance of its final disposition conferred in the Article will not be
exclusive of any other right which any person may have or acquire under the
by-laws, or any statute or agreement. or otherwise.

                                      II-1
<PAGE>   23

Finally, Article 6.7 of the Registrant's by-laws provides that the Registrant
may maintain insurance, at its expense, to reimburse itself and directors and
officers of the Registrant and of its direct and indirect subsidiaries against
any expense, liability or loss, whether or not the Registrant would have the
power to indemnify such persons against such expense, liability or loss under
the provisions of Article VI of the by-laws. The Registrant maintains and has in
effect such insurance.

Article 11 of the Registrant's certificate of incorporation eliminates the
personal liability of the Registrant's directors to the Registrant or its
stockholders for monetary damages for breach of their fiduciary duties as a
director to the fullest extent provided by Delaware law. Section 102(b)(7) of
the DGCL provides for the elimination off such personal liability, except for
liability (i) for any breach of the director's duty of loyalty to the Registrant
or its stockholders, (ii) for acts or omissions not in good faith or which
involve intentional misconduct or a knowing violation of law, (iii) under
Section 174 of the DGCL or (iv) for any transaction from which the director
derived any improper personal benefit.

Insofar as indemnification for liabilities arising under the Securities Act of
1933 (the "Securities Act") may be permitted to directors, officers or persons
controlling the Registrant pursuant to the foregoing provisions, the Registrant
has been informed that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Securities Act
and is therefore unenforceable.

ITEM 16.  EXHIBITS

<TABLE>
<CAPTION>
EXHIBIT
  NO.                                   DESCRIPTION
- -------                                 -----------
<C>       <C>   <S>
  4.1      --   Form of Series F Preferred Stock Purchase Agreement
  4.2      --   Certificate of Designations for Series F Convertible
                Preferred Stock (included as Exhibit A to Exhibit 4.1)
  4.3      --   Form of warrant issued in connection with the Series F
                Convertible Preferred Stock financing (included as Exhibit B
                to Exhibit 4.1)
  4.4      --   Form of Registration Rights Agreement for the Series F
                Convertible Preferred Stock financing (included as Exhibit C
                to Exhibit 4.1)
  5.1      --   Opinion of Snow Becker Krauss P.C..
 23.1      --   Consent of Snow Becker Krauss P.C. (included in Exhibit 5.1)
 23.2      --   Consent of Ernst & Young LLP, independent auditors.
 24.1      --   Power of Attorney (included in signature page of
                registration statement)
</TABLE>

ITEM 17.  UNDERTAKINGS

(a) RULE 415 OFFERING

The undersigned small business issuer hereby undertakes that it will:

     (1) File, during any period in which it offers or sells securities, a
         post-effective amendment to this registration statement to:

           (i) Include any prospectus required by section l0(a) (3) of the
               Securities Act.

           (ii) Reflect in the prospectus any facts or events which,
                individually or in the aggregate, represent a fundamental change
                in the information set forth in the registrant statement.
                Notwithstanding the foregoing, any increase or decrease in
                volume of securities offered (if the total dollar value of
                securities offered would not exceed that which was registered)
                and any deviation from the low or high end of the estimated

                                      II-2
<PAGE>   24

            maximum offering range may be reflected in the form of prospectus
            filed with the Commission pursuant to Rule 424(b) if, in the
            aggregate, the changes in volume and price represent no more than a
            20% change in the maximum aggregate offering price set forth in the
            "Calculation of Registration Fee" table in the effective
            registration statement.

        (iii) Include any material information with respect to the plan of
              distribution not previously disclosed in the registration
              statement or any material change to such information in the
              registration.

     (2) For determining any liability under the Securities Act, each such
         post-effective amendment shall be deemed a new registration statement
         relating to the securities offered therein, and the offering of such
         securities at that time to be the initial bona fide offering thereof.

     (3) Remove from registration by means of a post-effective amendment any of
         the securities being registered that remain unsold at the termination
         of the offering.

(e) REQUEST FOR ACCELERATION OF EFFECTIVE DATE

Insofar as indemnification for liabilities arising under the Securities Act of
1933 (the "Securities Act") may be permitted to directors, officers and
controlling persons of the small business issuer pursuant to the foregoing
provisions, or otherwise, the small business issuer has been advised that in the
opinion of the Securities and Exchange Commission such indemnification is
against public policy as expressed in the Securities Act and is, therefore,
unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by the small business issuer of the expenses
incurred or paid by a director, officer, or controlling person of the small
business issuer in the successful defense of any action, suit or proceeding) is
asserted by such director, officer or controlling person in connection with the
securities being registered, the small business issuer will, unless in the
opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Securities
Act and will be governed by the final adjudication of such issue.

                                      II-3
<PAGE>   25

                                   SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3 and has duly caused this amendment to the
Registration Statement to be signed on its behalf by the undersigned, hereunto
duly authorized, in the City of Davis, State of California, on February 14,
2000.

<TABLE>
<S>                                                    <C>
INTEGRATED SURGICAL SYSTEMS, INC.

              By: /s/ RAMESH C. TRIVEDI                                By: /s/ HENRY PAJARI
  -------------------------------------------------      -------------------------------------------------
                  Ramesh C. Trivedi                                        Henry Pajari
        Chief Executive Officer and President                               Controller
            (Principal Executive Officer)                         (Principal Accounting Officer)
</TABLE>

                               POWER OF ATTORNEY

Each person whose signature appears below hereby constitutes and appoints Ramesh
C. Trivedi his true and lawful attorney-in-fact and agent, with power of
substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, to sign any and all amendments (including post-effective
amendments) to this registration statement, and to file the same, with exhibits
thereto and other documents in connection therewith, with the Securities and
Exchange Commission, hereby ratifying all that said attorney-in-fact and agent
or his substitute or substitutes, or any of them, may lawfully do or cause to be
done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, this amendment to
the Registration Statement has been signed by the following persons in the
capacities indicated on February 14, 2000.

<TABLE>
<CAPTION>
                 SIGNATURES                                             TITLE
                 ----------                                             -----

<S>                                             <C>
            /s/ RAMESH C. TRIVEDI               Chief Executive Officer, President
   ---------------------------------------        and a Director
              Ramesh C. Trivedi                   (Principal Executive Officer)

                                                Director
- ---------------------------------------
Falah-Al Kadi

             /s/ JOHN N. KAPOOR                 Director
   ---------------------------------------
               John N. Kapoor

             /s/ BERND HERRMANN                 Director
   ---------------------------------------
               Bernd Herrmann

              /s/ URS WETTSTEIN                 Director
   ---------------------------------------
                Urs Wettstein
</TABLE>

                                      II-4
<PAGE>   26

                                 EXHIBIT INDEX

<TABLE>
<CAPTION>
EXHIBIT
NO.                                  DESCRIPTION                                PAGE
- -------                              -----------                                ----
<C>       <C>   <S>                                                             <C>
   4.1     --   Form of Series F Preferred Stock Purchase Agreement
   4.2     --   Certificate of Designations for Series F Convertible
                Preferred Stock (included as Exhibit A to Exhibit 4.1)
   4.3     --   Form of warrant issued in connection with the Series F
                Convertible Preferred Stock financing (included as Exhibit B
                to Exhibit 4.1)
   4.4     --   Form of Registration Rights Agreement for the Series F
                Convertible Preferred Stock financing (included as Exhibit C
                to Exhibit 4.1)
   5.1     --   Opinion of Snow Becker Krauss P.C..
  23.1     --   Consent of Snow Becker Krauss P.C. (included in Exhibit 5.1)
  23.2     --   Consent of Ernst & Young LLP, independent auditors.
  24.1     --   Power of Attorney (included in signature page of
                registration statement)
</TABLE>

                                      II-5

<PAGE>   1

                                                                     EXHIBIT 4.1



                       PREFERRED STOCK PURCHASE AGREEMENT

                                     BETWEEN

                        INTEGRATED SURGICAL SYSTEMS, INC.

                                     AND THE

                           INVESTORS SIGNATORY HERETO

         PREFERRED STOCK PURCHASE AGREEMENT dated as of February 8, 2000 (the
"Agreement"), between Integrated Surgical Systems, Inc., a corporation organized
and existing under the laws of the State of Delaware (the "Company") and the
persons signatory hereto (each an "Investor").

         WHEREAS, the parties desire that, upon the terms and subject to the
conditions contained herein, the Company shall issue and sell to the Investors,
and the Investors shall purchase, for a total purchase price of $2,000,000,
2,000 shares of the Company's Series F Convertible Preferred Stock and warrants
to purchase an aggregate of 125,000 shares of the Company's common stock.

         WHEREAS, the issuance and sale of the Series F Convertible Preferred
Stock and the warrants to the Investor will be made in reliance upon the
provisions of Section 4(2) of the Securities Act of 1933, as amended, and
Regulation D promulgated thereunder by the Securities and Exchange Commission.

NOW, THEREFORE, the parties hereto agree as follows:

                                    ARTICLE I

                               CERTAIN DEFINITIONS

Section 1.1.   "Bid Price" shall mean the closing bid price (as reported by
Bloomberg L.P.) of the Common Stock on the Principal Market.

Section 1.2.   "Capital Shares" shall mean the Common Stock and any shares of
any other class of common stock whether now or hereafter authorized, having the
right to participate in the distribution of earnings and assets of the Company.

Section 1.3.   "Capital Shares Equivalents" shall mean any securities, rights or
obligations that are convertible into or exchangeable for or give any right to
subscribe for any Capital Shares of the



                                       1
<PAGE>   2


Company or any warrants, options or other rights to subscribe for or purchase
Capital Shares or any such convertible or exchangeable securities.

Section 1.4.   "Closing" shall mean the closing of the purchase and sale of the
Preferred Stock pursuant to Section 2.1.

Section 1.5.   "Closing Date" shall mean the date on which all conditions to
closing have been satisfied and the Closing shall have occurred.

Section 1.6.   "Common Stock" shall mean the Company's common stock, par value
$.01 per share.

Section 1.7.   "Conversion Shares" shall mean the shares of Common Stock
issuable upon conversion of the Preferred Stock.

Section 1.8.   "Damages" shall mean any loss, claim, damage, liability, costs
and expenses (including, without limitation, reasonable attorney's fees and
disbursements and costs and expenses of expert witnesses and investigation).

Section 1.9.   "Effective Date" shall mean the date on which the SEC first
declares effective a Registration Statement registering the resale of the
Registrable Securities as set forth in Section 6.1.

Section 1.10   "Exchange Act" shall mean the Securities Exchange Act of 1934, as
amended, and the rules and regulations promulgated by the SEC thereunder.

Section 1.11   "Legend" See Section 9.1.

Section 1.12.  "Market Price" on any given date shall mean the single lowest
intraday or closing price (as reported by Bloomberg L.P.) of the Common Stock on
any Trading Day during the five Trading Days prior to the date for which Market
Price is to be determined.

Section 1.13.  "Material Adverse Effect" shall mean any effect on the business,
Bid Price, operations, properties, prospects, or financial condition of the
Company that is material and adverse to the Company and its subsidiaries and
affiliates, taken as a whole, and/or any condition, circumstance, or situation
that would prohibit or otherwise interfere with the ability of the Company to
enter into and perform any of its obligations under this Agreement, the
Registration Rights Agreement or the Warrant in any material respect.

Section 1.14.  "NASD" shall mean the National Association of Securities Dealers,
Inc.

Section 1.15.  "Outstanding" when used with reference to shares of Common Stock
or Capital Shares (collectively the "Shares"), shall mean, at any date as of
which the number of such Shares is to be determined, all issued and outstanding
Shares, and shall include all such Shares issuable in




                                       2
<PAGE>   3


respect of outstanding scrip or any certificates representing fractional
interests in such Shares; provided, however, that "Outstanding" shall not mean
any such Shares then directly or indirectly owned or held by or for the account
of the Company.

Section 1.16.  "Person" shall mean an individual, a corporation, a partnership,
an association, a trust or other entity or organization, including a government
or political subdivision or an agency or instrumentality thereof.

Section 1.17.  "Preferred Stock" shall mean the Company's Series F Convertible
Preferred Stock, par value $.01 per share, issued pursuant to the Certificate of
Designations attached hereto as Exhibit A.

Section 1.18.  "Principal Market" shall mean the Nasdaq National Market, The
Nasdaq SmallCap Market, the American Stock Exchange or the New York Stock
Exchange, whichever is at the time the principal trading exchange or market for
the Common Stock.

Section 1.19.  "Purchase Price" shall mean one thousand dollars ($1,000) per
share.

Section 1.20.  "Registrable Securities" shall mean the Conversion Shares and the
Warrant Shares until (i) the Registration Statement has been declared effective
by the SEC, and all Conversion Shares and Warrant Shares have been disposed of
pursuant to the Registration Statement, (ii) all Conversion Shares and Warrant
Shares have been sold under circumstances under which all of the applicable
conditions of Rule 144 (or any similar provision then in force) under the
Securities Act ("Rule 144") are met, (iii) all Conversion Shares and Warrant
Shares have been otherwise transferred to holders who may trade such shares
without restriction under the Securities Act, and the Company has delivered a
new certificate or other evidence of ownership for such securities not bearing a
restrictive legend or (iv) such time as, in the opinion of counsel to the
Company, all Conversion Shares and Warrant Shares may be sold without any time,
volume or manner limitations pursuant to Rule 144(k) (or any similar provision
then in effect) under the Securities Act.

Section 1.21.  "Registration Rights Agreement" shall mean the agreement
regarding the filing of the Registration Statement for the resale of the
Registrable Securities, entered into between the Company and the Investor on the
Closing Date annexed hereto as Exhibit C.

Section 1.22.  "Registration Statement" shall mean a registration statement on
Form S-3 (if use of such form is then available to the Company pursuant to the
rules of the SEC and, if not, on such other form promulgated by the SEC for
which the Company then qualifies and which counsel for the Company shall deem
appropriate, and which form shall be available for the resale of the Registrable
Securities to be registered thereunder in accordance with the provisions of this
Agreement, the Registration Rights Agreement, and the Warrant and in accordance
with the intended method of distribution of such securities), for the
registration of the resale by the Investor of the Registrable Securities under
the Securities Act.



                                       3
<PAGE>   4


Section 1.23   "Regulation D" shall mean Regulation D promulgated by the SEC
under Section 4(2) of the Securities Act.

Section 1.24   "SEC" shall mean the Securities and Exchange Commission.

Section 1.25   "Section 4(2)" shall mean Section 4(2) of the Securities Act.

Section 1.26   "Securities Act" shall mean the Securities Act of 1933, as
amended, and the rules and regulations promulgated by the SEC thereunder.

Section 1.27   "SEC Documents" shall mean the Company's Form 10-KSB for the
fiscal year ended December 31, 1998; Form 10-QSBs for the fiscal quarters ended
March 31, 1999 (as amended), June 30, 1999 and September 30, 1999; Form 8-Ks
dated April 28, 1999 and December 14, 1999; Proxy Statements dated March 27,
1999 and October 5, 1999; and its Prospectus dated December 8, 1999.

Section 1.28.  "Trading Day" shall mean any day during which the New York Stock
Exchange shall be open for business.

Section 1.29,  "Warrant" shall have the meaning set forth in Section 2.2 and
substantially in the form of Exhibit B.

Section 1.30.  "Warrant Shares" shall mean all shares of Common Stock or other
securities issued or issuable pursuant to exercise of the Warrant.

                                   ARTICLE II

                        PURCHASE AND SALE OF COMMON STOCK

Section 2.1.   Investment.

         (a)   The Company agrees to sell and each Investor, severally and not
jointly, agrees to purchase the number of shares of Preferred Stock set forth on
the signature page hereto at the Purchase Price on the Closing Date.

         (b)   On the Closing Date, the Company shall issue and sell to the
Investor, against payment of the total Purchase Price of the shares of Preferred
Stock purchased by the Investor by wire transfer of immediately available funds
in accordance with instructions from the Company, the shares of Preferred Stock
set forth on the signature page hereto and the Warrant.

         (c)   The Closing of the sale and purchase of the Preferred Stock and
Warrant shall be subject to the completion of the following conditions:



                                       4
<PAGE>   5



               (i)    acceptance and execution by the Company and the Investor
                      of this Agreement and all Exhibits hereto;

               (ii)   all representations and warranties of the Investor and of
                      the Company contained herein shall remain true and correct
                      as of the Closing Date;

               (iii)  the Company shall have obtained all permits and
                      qualifications required by any state for the offer and
                      sale of the Preferred Stock and Warrant, or shall have the
                      availability of exemptions therefrom;

               (iv)   the sale and issuance of the Preferred Stock and Warrant,
                      and the proposed issuance of the Common Stock underlying
                      the Preferred Stock and the Warrant shall be legally
                      permitted by all laws and regulations to which the
                      Investor and the Company are subject and there shall be no
                      ruling, judgment or writ of any court prohibiting the
                      transactions contemplated by this Agreement;

               (v)    receipt by the Investor of an opinion of Snow Becker
                      Krauss P.C., counsel to the Company, in the form of
                      Exhibit D hereto;

               (vi)   delivery to the Investor of the Irrevocable Instructions
                      to Transfer Agent in the form attached hereto as Exhibit
                      E;

               (vii)  there not having occurred (i) any general suspension of
                      trading in, or limitation on prices listed for, the Common
                      Stock on The Nasdaq Small Cap Market, (ii) the declaration
                      of a banking moratorium or any suspension of payments in
                      respect of banks in the United States, (iii) the
                      commencement of a war, armed hostilities or other
                      international or national calamity directly or indirectly
                      involving the United States or any of its territories,
                      protectorates or possessions, or (iv) in the case of the
                      foregoing existing at the date of this Agreement, a
                      material acceleration or worsening thereof; and

               (viii) there not having occurred any event or development, and
                      there being in existence no condition, having or which
                      reasonably and forseeably could have a Material Adverse
                      Effect.

Section 2.2.   The Warrant. On the Closing Date, the Company will issue to the
Investor a warrant exercisable beginning six months from the Closing Date and
then exercisable any time over the three-year period there following, to
purchase the Investor's pro rata share of an aggregate of 125,000 Warrant Shares
at the Exercise Price (as defined in the Warrant) in the form of Exhibit B
hereto. The Warrant Shares shall be registered for resale pursuant to the
Registration Rights Agreement.

Section 2.3.   Liquidated Damages. The parties hereto acknowledge and agree that
the sums payable pursuant to the Registration Rights Agreement shall constitute
liquidated damages and not penalties. The parties further acknowledge that (a)
the amount of loss or damages likely to be incurred is incapable or is difficult
to precisely estimate, (b) the amounts specified in such Sections bear a
reasonable proportion and are not plainly or grossly disproportionate to the
probable loss likely to be incurred by the Investor in connection with the
failure by the Company to timely cause the registration of the Registrable
Securities and (c) the parties are sophisticated business parties and



                                       5
<PAGE>   6



have been represented by sophisticated and able legal and financial counsel and
negotiated this Agreement at arm's length.

                                   ARTICLE III

                   REPRESENTATIONS AND WARRANTIES OF INVESTOR

The Investor represents and warrants to the Company that:

Section 3.1.   Intent. The Investor is entering into this Agreement for its own
account and the Investor has no present arrangement (whether or not legally
binding) at any time to sell the Common Stock to or through any person or
entity; provided, however, that by making the representations herein, the
Investor does not agree to hold the Common Stock for any minimum or other
specific term and reserves the right to dispose of the Common Stock at any time
in accordance with federal and state securities laws applicable to such
disposition.

Section 3.2.   Sophisticated Investor. The Investor is a sophisticated investor
(as described in Rule 506(b)(2)(ii) of Regulation D) and an accredited investor
(as defined in Rule 501 of Regulation D), and Investor has such experience in
business and financial matters that it is capable of evaluating the merits and
risks of an investment in Common Stock. The Investor acknowledges that an
investment in the Common Stock is speculative and involves a high degree of
risk.

Section 3.3.   Authority. This Agreement and each Exhibit hereto which is
required to be executed by Investor has been duly authorized and validly
executed and delivered by the Investor and is a valid and binding agreement of
the Investor enforceable against it in accordance with its terms, subject to
applicable bankruptcy, insolvency, or similar laws relating to, or affecting
generally the enforcement of, creditors' rights and remedies or by other
equitable principles of general application.

Section 3.4.   Not an Affiliate. The Investor is not an officer, director or
"affiliate" (as that term is defined in Rule 405 of the Securities Act) of the
Company.

Section 3.5.   Absence of Conflicts. The execution and delivery of this
Agreement and any other document or instrument executed in connection herewith,
and the consummation of the transactions contemplated thereby, and compliance
with the requirements thereof, will not violate any law, rule, regulation,
order, writ, judgment, injunction, decree or award binding on Investor, or, to
the Investor's knowledge, (a) violate any provision of any indenture, instrument
or agreement to which Investor is a party or is subject, or by which Investor or
any of its assets is bound; (b) conflict with or constitute a material default
thereunder; (c) result in the creation or imposition of any lien pursuant to the
terms of any such indenture, instrument or agreement, or constitute a breach of
any fiduciary duty owed by Investor to any third party; or (d) require the
approval of any third-party (which has not been obtained) pursuant to any
material contract, agreement, instrument, relationship or legal obligation to
which Investor is subject or to which any of its assets, operations or
management may be subject.



                                       6
<PAGE>   7


Section 3.6.   Disclosure; Access to Information. Investor has received all
documents, records, books and other publicly available information pertaining to
Investor's investment in the Company that have been requested by Investor. The
Company is subject to the periodic reporting requirements of the Exchange Act,
and Investor has reviewed or received copies of any such reports that have been
requested by it.

Section 3.7. Manner of Sale. At no time was Investor presented with or
solicited by or through any leaflet, public promotional meeting, television
advertisement or any other form of general solicitation or advertising.

                                   ARTICLE IV

                  REPRESENTATIONS AND WARRANTIES OF THE COMPANY

The Company represents and warrants to the Investor that, except as set forth on
the Schedule of Exceptions attached hereto:

Section 4.1.   Organization of the Company. The Company is a corporation duly
incorporated and existing in good standing under the laws of the State of
Delaware and has all requisite corporate authority to own its properties and to
carry on its business as now being conducted as described in the Company's SEC
Documents. The Company does not have any subsidiaries and does not own more that
fifty percent (50%) of or control any other business entity, except as set forth
in the SEC Documents. The Company is duly qualified as a foreign corporation to
do business and is in good standing in every jurisdiction in which the nature of
the business conducted or property owned by it makes such qualification
necessary, other than those in which the failure so to qualify could not
reasonably be expected to have a Material Adverse Effect.

Section 4.2.   Authority. (i) The Company has the requisite corporate power and
authority to enter into and perform its obligations under this Agreement, the
Registration Rights Agreement and the Warrant and to issue the Preferred Stock,
the Conversion Shares, the Warrant and the Warrant Shares, (ii) the execution,
issuance and delivery of this Agreement, the Registration Rights Agreement and
the Warrant by the Company and the consummation by it of the transactions
contemplated hereby have been duly authorized by all necessary corporate action
and no further consent or authorization of the Company or its Board of Directors
or stockholders is required, and (iii) this Agreement, the Registration Rights
Agreement and the Warrant have been duly executed and delivered by the Company
and constitute valid and binding obligations of the Company enforceable against
the Company in accordance with their terms, except as such enforceability may be
limited by applicable bankruptcy, insolvency, or similar laws relating to, or
affecting generally the enforcement of, creditors' rights and remedies or by
other equitable principles of general application. The Company has duly and
validly authorized and reserved for issuance shares of Common Stock sufficient
in number for the conversion of 2,000 shares of Preferred Stock and for the
exercise of the Warrants. The Company understands and acknowledges the
potentially dilutive effect to the Common Stock of the issuance of the
Conversion Shares and the Warrant Shares. The



                                       7
<PAGE>   8


Company further acknowledges that its obligation to issue Conversion Shares upon
conversion of the Preferred Stock and Warrant Shares upon exercise of the
Warrants in accordance with this Agreement and the Certificate of Designations
is absolute and unconditional regardless of the dilutive effect that such
issuance may have on the ownership interests of other stockholders of the
Company and notwithstanding the commencement of any case under 11 U.S.C. Section
101 et seq. (the "Bankruptcy Code"). In the event the Company is a debtor under
the Bankruptcy Code, the Company hereby waives to the fullest extent permitted
any rights to relief it may have under 11 U.S.C. Section 362 in respect of the
conversion of the Preferred Stock and the exercise of the Warrants. The Company
agrees, without cost or expense to the Investor, to take or consent to any and
all action necessary to effectuate relief under 11 U.S.C. Section 362.

Section 4.3.   Capitalization. The authorized capital stock of the Company
consists of 50,000,000 shares of Common Stock, par value $0.01, of which
14,291,915 were issued and outstanding as of December 31, 1999, and 1,000,000
shares of Preferred Stock, par value $0.01, of which 1,725 shares of Series D
Convertible Preferred Stock and 1,200 shares of Series E Convertible Preferred
Stock were issued and outstanding as of December 31, 1999, and 2,000 shares of
Preferred Stock have been properly designated as Series F Convertible Preferred
Stock. Except as set forth in the SEC Documents, there are no outstanding
Capital Shares Equivalents. All of the outstanding shares of Common Stock of the
Company have been duly and validly authorized and issued and are fully paid and
non-assessable.

Section 4.4.   Common Stock. The Company has registered its Common Stock
pursuant to Section 12(b) or (g) of the Exchange Act and is in full compliance
with all reporting requirements of the Exchange Act, and the Company has
maintained all requirements for the continued listing or quotation of its Common
Stock, and such Common Stock is currently listed or quoted on the Principal
Market. As of the date hereof, the Principal Market is The Nasdaq SmallCap
Market and the Company has not received any notice regarding, and to its
knowledge there is no threat, of the termination or discontinuance of the
eligibility of the Common Stock for such listing.

Section 4.5.   SEC Documents. The Company has delivered or made available to the
Investor true and complete copies of the SEC Documents. The Company has not
provided to the Investor any information that, according to applicable law, rule
or regulation, should have been disclosed publicly prior to the date hereof by
the Company, but which has not been so disclosed. As of their respective dates,
the SEC Documents complied in all material respects with the requirements of the
Exchange Act, and rules and regulations of the SEC promulgated thereunder and
the SEC Documents did not contain any untrue statement of a material fact or
omitted to state a material fact required to be stated therein or necessary in
order to make the statements therein, in light of the circumstances under which
they were made, not misleading. The financial statements of the Company included
in the SEC Documents complied in all material respects with applicable
accounting requirements and the published rules and regulations of the SEC or
other applicable rules and regulations with respect thereto. Such financial
statements have been prepared in accordance with generally accepted accounting
principles applied on a consistent basis during the periods involved (except (i)
as may be otherwise indicated in such financial statements or the notes thereto
or (ii) as set forth in Section



                                       8
<PAGE>   9


4.5 to the Schedule of Exceptions) and fairly present in all material respects
the financial position of the Company as of the dates thereof and the results of
operations and cash flows for the periods then ended. Neither the Company nor
any of its subsidiaries has any indebtedness, obligations or liabilities of any
kind (whether accrued, absolute, contingent or otherwise, and whether due or to
become due) that would have been required to be reflected in, reserved against
or otherwise described in the financial statements or in the notes thereto in
accordance with GAAP, which was not fully reflected in, reserved against or
otherwise described in the financial statements or the notes thereto or was not
incurred in the ordinary course of business consistent with the Company's past
practices since the late date of the financial statements.

Section 4.6.   Exemption from Registration; Valid Issuances. The sale of the
Preferred Stock, the Conversion Shares, the Warrant and the Warrant Shares will
be properly issued pursuant to Rule 4(2), Regulation D and/or any applicable
state securities law. When issued, the Preferred Stock, the Conversion Shares
and the Warrant Shares will be duly and validly issued, fully paid, and
non-assessable. Neither the sales of the Preferred Stock, the Conversion Shares,
the Warrant or the Warrant Shares pursuant to, nor the Company's performance of
its obligations under, this Agreement, the Registration Rights Agreement or the
Warrant will (i) result in the creation or imposition by the Company of any
liens, charges, claims or other encumbrances upon the Preferred Stock, the
Conversion Shares, the Warrant Shares or any of the assets of the Company, or
(ii) entitle the holders of Outstanding Capital Shares to preemptive or other
rights to subscribe to or acquire the Capital Shares or other securities of the
Company. The Preferred Stock, the Conversion Shares, and the Warrant Shares
shall not subject the Investor to personal liability by reason of the possession
thereof.

Section 4.7.   No General Solicitation or Advertising in Regard to this
Transaction. Neither the Company nor any of its affiliates nor any distributor
or any person acting on its or their behalf (i) has conducted or will conduct
any general solicitation (as that term is used in Rule 502(c) of Regulation D)
or general advertising with respect to any of the Preferred Stock, the
Conversion Shares, the Warrant or the Warrant Shares, or (ii) made any offers or
sales of any security or solicited any offers to buy any security under any
circumstances that would require registration of the Preferred Stock, the
Conversion Shares, the Warrant or the Warrant Shares under the Securities Act.

Section 4.8.   Corporate Documents. The Company has furnished or made available
to the Investor true and correct copies of the Company's Restated Certificate of
Incorporation, as amended and in effect on the date hereof, and the Company's
By-Laws, as amended and in effect on the date hereof.

Section 4.9.   No Conflicts. The execution, delivery and performance of this
Agreement by the Company and the consummation by the Company of the transactions
contemplated hereby, including without limitation the issuance of the Preferred
Stock, the Conversion Shares, the Warrant and the Warrant Shares, do not and
will not (i) result in a violation of the Company's Restated Certificate of
Incorporation or By-Laws, each as amended and in effect as of the date hereof,
or (ii) conflict with, or constitute a material default (or an event that with
notice or lapse of time or both would become a default) under, or give to others
any rights of termination, amendment, acceleration or



                                       9
<PAGE>   10


cancellation of, any material agreement, indenture, instrument or any "lock-up"
or similar provision of any underwriting or similar agreement to which the
Company is a party, or (iii) result in a violation of any federal, state or
local law, rule, regulation, order, judgment or decree (including federal and
state securities laws and regulations) applicable to the Company or by which any
property or asset of the Company is bound or affected (except for such
conflicts, defaults, terminations, amendments, accelerations, cancellations and
violations as could not reasonably be expected to have, individually or in the
aggregate, a Material Adverse Effect) nor is the Company otherwise in violation
of, conflict with or in default under any of the foregoing. The business of the
Company is not being conducted in violation of any law, ordinance or regulation
of any governmental entity, except for possible violations that either singly or
in the aggregate could not reasonably be expected to have a Material Adverse
Effect. The Company is not required under federal, state or local law, rule or
regulation to obtain any consent, authorization or order of, or make any filing
or registration with, any court or governmental agency in order for it to
execute, deliver or perform any of its obligations under this Agreement or issue
and sell the Preferred Stock or the Warrant in accordance with the terms hereof
(other than any SEC, NASD, The Nasdaq Stock Market Inc., or state securities
filings that may be required to be made by the Company subsequent to any
Closing, any registration statement that may be filed pursuant hereto, and any
shareholder approval required by the rules applicable to companies whose common
stock trades on The Nasdaq SmallCap Market); provided that, for purposes of the
representation made in this sentence, the Company is assuming and relying upon
the accuracy of the relevant representations and agreements of the Investor
herein.

Section 4.10.  No Material Adverse Change. Since January 1, 1999, no Material
Adverse Effect has occurred or exists with respect to the Company, except as
disclosed in the SEC Documents. No "Event of Default" (as defined in any
agreement or instrument to which the Company or any of its subsidiaries is a
party) and no event which, with notice, lapse of time or both, would constitute
an Event of Default (as so defined), has occurred and is continuing which could
have a Material Adverse Effect.

Section 4.11.  No Undisclosed Liabilities. The Company has no liabilities or
obligations which are material, individually or in the aggregate, and are not
disclosed in the SEC Documents or otherwise publicly announced, other than those
incurred in the ordinary course of the Company's business since January 1, 1999,
and which, individually or in the aggregate, could not reasonably be expected to
have a Material Adverse Effect.

Section 4.12.  No Undisclosed Events or Circumstances. Since January 1, 1999 no
event or circumstance has occurred or exists with respect to the Company or its
businesses, properties, prospects, operations or financial condition, that,
under applicable law, rule or regulation, requires public disclosure or
announcement prior to the date hereof by the Company but which has not been so
publicly announced or disclosed in the SEC Documents.

Section 4.13.  No Integrated Offering. Except as set forth in the SEC Documents,
the Company has not issued, offered or sold any shares of convertible preferred
stock, warrants to purchase shares



                                       10
<PAGE>   11


of Common Stock or any shares of Common Stock (including for this purpose any
securities convertible into a exchangeable or exercisable for the Preferred
Stock or Common Stock or any such other securities) within the six-month period
next preceding the date hereof, and the Company shall not permit any of its
directors, officers or Affiliates directly or indirectly to take, any action
(including, without limitation, any offering or sale to any person or entity of
the Preferred Stock, Warrants or shares of Common Stock), so as to make
unavailable the exemption from Securities Act registration being relied upon by
the Company for the offer and sale to Investor of the Preferred Stock (and the
Conversion Shares) or the Warrants (and the Warrant Shares) as contemplated by
this Agreement. No form of general solicitation or advertising has been used or
authorized by the Company or any of its officers, directors or Affiliates in
connection with the offer or sale of the Preferred Stock (and the Conversion
Shares) as contemplated by this Agreement or any other agreement to which the
Company is a party.

Section 4.14.  Litigation and Other Proceedings. There are no lawsuits or
proceedings pending or to the best knowledge of the Company threatened, against
the Company, nor has the Company received any written or oral notice of any such
action, suit, proceeding or investigation, which could reasonably be expected to
have a Material Adverse Effect. Except as set forth in the SEC Documents, no
judgment, order, writ, injunction or decree or award has been issued by or, so
far as is known by the Company, requested of any court, arbitrator or
governmental agency which might result in a Material Adverse Effect.

Section 4.15.  No Misleading or Untrue Communication. The Company, any person
representing the Company, and, to the best knowledge of the Company, any other
person selling or offering to sell the Preferred Stock or the Warrant in
connection with the transaction contemplated by this Agreement, have not made,
at any time, any oral communication in connection with the offer or sale of the
same which contained any untrue statement of a material fact or omitted to state
any material fact necessary in order to make the statements, in the light of the
circumstances under which they were made, not misleading.

Section 4.16.  Material Non-Public Information. The Company has not disclosed to
the Investor any material non-public information that (i) if disclosed, would,
or could reasonably be expected to have, an effect on the price of the Common
Stock or (ii) according to applicable law, rule or regulation, should have been
disclosed publicly by the Company prior to the date hereof but which has not
been so disclosed.

Section 4.17.  Insurance. The Company maintains property and casualty, general
liability, workers' compensation, environmental hazard, personal injury and
other similar types of insurance with financially sound and reputable insurers
that is adequate, consistent with industry standards and the Company's
historical claims experience. The Company has not received notice from, and has
no knowledge of any threat by, any insurer (that has issued any insurance policy
to the Company) that such insurer intends to deny coverage under or cancel,
discontinue or not renew any insurance policy presently in force.



                                       11
<PAGE>   12


Section 4.18.  Environmental Matters.

         1.    The operations of the Company and each of its subsidiaries are in
material compliance with all applicable Environmental Laws and all permits
issued pursuant to Environmental Laws or otherwise;

         2.    to its knowledge, the Company and each of its subsidiaries has
obtained or applied for all material permits required under all applicable
Environmental Laws necessary to operate its business;

         3.    neither the Company nor either of its subsidiaries is the subject
of any outstanding written order of or agreement with any governmental authority
or person respecting (i) Environmental Laws, (ii) Remedial Action or (iii) any
Release or threatened Release of Hazardous Materials;

         4.    neither the Company nor either of its subsidiaries has received,
since December 31, 1997, any written communication alleging that it may be in
violation of any Environmental Law or any permit issued pursuant to any
Environmental Law, or may have any liability under any Environmental Law;

         5.    neither the Company nor either of its subsidiaries has any
current contingent liability in connection with any Release of any Hazardous
Materials into the indoor or outdoor environment (whether on-site or off-site);

         6.    to the Company's knowledge, there are no investigations of the
business, operations, or currently or previously owned, operated or leased
property of the Company or either of its subsidiaries pending or threatened
which could lead to the imposition of any liability pursuant to any
Environmental Law;

         7.    there is not located at any of the properties of the Company any
(A) underground storage tanks, (B) asbestos-containing material or (C) equipment
containing polychlorinated biphenyls; and

         8.    the Company has provided to Investor all environmentally related
audits, studies, reports, analyses, and results of investigations that have been
performed with respect to the currently or previously owned, leased or operated
properties of the Company.

               For purposes of this Section 4.18:

         "Environmental Law" means any foreign, federal, state or local statute,
regulation, ordinance, or rule of common law as now or hereafter in effect in
any way relating to the protection of human health and safety or the environment
including, without limitation, the Comprehensive



                                       12
<PAGE>   13


Environmental Response, Compensation and Liability Act (42 U.S.C. Section 9601
et seq.), the Hazardous Materials Transportation Act (49 U.S.C. App. Section
1801 et seq.), the Resource Conservation and Recovery Act (42 U.S.C. Section
6901 et seq.), the Clean Water Act (33 U.S.C. Section 1251 et seq.), the Clean
Air Act (42 U.S.C. Section 7401 et seq.), the Toxic Substances Control Act (15
U.S.C. Section 2601 et seq.), the Federal Insecticide, Fungicide, and
Rodenticide Act (7 U.S.C. Section 136 et seq.), and the Occupational Safety and
Health Act (29 U.S.C. Section 651 et seq.), and the regulations promulgated
pursuant thereto.

         "Hazardous Material" means any substance, material or waste which is
regulated by the United States, Canada or any of its provinces, or any state or
local governmental authority including, without limitation, petroleum and its
by-products, asbestos, and any material or substance which is defined as a
"hazardous waste," "hazardous substance," "hazardous material," "restricted
hazardous waste," "industrial waste," "solid waste," "contaminant," "pollutant,"
"toxic waste" or toxic substance" under any provision of any Environmental Law;

         "Release" means any release, spill, filtration, emission, leaking,
pumping, injection, deposit, disposal, discharge, dispersal, or leaching into
the indoor or outdoor environment, or into or out of any property;

         "Remedial Action" means all actions to (x) clean up, remove, treat or
in any other way address any Hazardous Material; (y) prevent the Release of any
Hazardous Material so it does not endanger or threaten to endanger public health
or welfare or the indoor or outdoor environment; or (z) perform pre-remedial
studies and investigations or post-remedial monitoring and care.

Section 4.19.  Labor Matters. Neither the Company nor any of its subsidiaries is
a party to any labor or collective bargaining agreement and there are no labor
or collective bargaining agreements which pertain to employees of the Company.
No employees of the Company are represented by any labor organization and none
of such employees has made a pending demand for recognition, and there are no
representation proceedings or petitions seeking a representation proceeding
presently pending or, to the Company's knowledge, threatened to be brought or
filed, with the National Labor Relations Board or other labor relations
tribunal. There is no organizing activity involving the Company pending or to
the Company's knowledge, threatened by any labor organization or group of
employees of the Company. There are no (i) strikes, work stoppages, slowdowns,
lockouts or arbitrations or (ii) material grievances or other labor disputes
pending or, to the knowledge of the Company, threatened against or involving the
Company. There are no unfair labor practice charges, grievances or complaints
pending or, to the knowledge of the Company, threatened by or on behalf of any
employee or group of employees of the Company.

Section 4.20.  ERISA Matters. The Company and its ERISA Affiliates are in
compliance in all material respects with all provisions of ERISA applicable to
it. No Reportable Event has occurred, been waived or exists as to which the
Company or any ERISA Affiliate was required to file a report with the Pension
Benefits Guaranty Corporation, and the present value of all liabilities under
all Plans (based on those assumptions used to fund such Plans) did not, as of
the most recent annual valuation date applicable thereto, exceed the value of
the assets of all such Plans in the aggregate.



                                       13
<PAGE>   14


None of the Company or ERISA Affiliates has incurred any Withdrawal Liability
that could result in a Material Adverse Effect. None of the Company or ERISA
Affiliates has received any notification that any Multiemployer Plan is in
reorganization or has been terminated within the meaning of Title IV of ERISA,
and no Multiemployer Plan is reasonably expected to be in reorganization or
termination where such reorganization or termination has resulted or could
reasonably be expected to result in increases to the contributions required to
be made to such Plan or otherwise.

         For purposes of this Section 4.20:

         "ERISA" means the Employee Retirement Income Security Act of 1974, or
any successor statute, together with the regulations thereunder, as the same may
be amended from time to time.

         "ERISA Affiliate" means any trade or business (whether or not
incorporated) that was, is or hereafter may become, a member of a group of which
the Company is a member and which is treated as a single employer under Section
414 of the Internal Revenue Code of 1986, as amended (the "Internal Revenue
Code").

         "Multiemployer Plan" means a multiemployer plan as defined in Section
4001(a)(3) of ERISA to which the Company or any ERISA Affiliate (other than one
considered an ERISA Affiliate only pursuant to subsection (m) or (o) of Section
414 of the Internal Revenue Code) is making or accruing an obligation to make
contributions, or has within any of the preceding five plan years made or
accrued an obligation to make contributions.

         "PBGC" means the Pension Benefit Guaranty Corporation referred to and
defined in ERISA or any successor thereto.

         "Plan" means any pension plan (other than a Multiemployer Plan) subject
to the provision of Title IV of ERISA or Section 412 of the Internal Revenue
Code that is maintained for employees of the Company or any ERISA Affiliate.

         "Reportable Event" means any reportable event as defined in Section
4043(b) of ERISA or the regulations issued thereunder with respect to a Plan
(other than a Plan maintained by an ERISA Affiliate that is considered an ERISA
Affiliate only pursuant to subsection (m) or (o) of Section 414 of the Internal
Revenue Code.

         "Withdrawal Liability" means liability to a Multiemployer Plan as a
result of a complete or partial withdrawal from such Multiemployer Plan, as such
terms are defined in Part I of Subtitle E of Title IV of ERISA.



                                       14
<PAGE>   15


Section 4.21.  Tax Matters.

         1.    The Company has filed all Tax Returns which it is required to
file under applicable Laws; all such Tax Returns are true and accurate and have
been prepared in compliance with all applicable Laws; the Company has paid all
Taxes due and owing by it (whether or not such Taxes are required to be shown on
a Tax Return) and have withheld and paid over to the appropriate taxing
authorities all Taxes which it is required to withhold from amounts paid or
owing to any employee, stockholder, creditor or other third parties; and since
December 31, 1998, the charges, accruals and reserves for Taxes with respect to
the Company (including any provisions for deferred income taxes) reflected on
the books of the Company are adequate to cover any Tax liabilities of the
Company if its current tax year were treated as ending on the date hereof.

         2.    No claim has been made by a taxing authority in a jurisdiction
where the Company does not file tax returns that such corporation is or may be
subject to taxation by that jurisdiction. There are no foreign, federal, state
or local tax audits or administrative or judicial proceedings pending or being
conducted with respect to the Company; no information related to Tax matters has
been requested by any foreign, federal, state or local taxing authority; and,
except as disclosed above, no written notice indicating an intent to open an
audit or other review has been received by the Company from any foreign,
federal, state or local taxing authority. There are no material unresolved
questions or claims concerning the Company's Tax liability. The Company (A) has
not executed or entered into a closing agreement pursuant to Section 7121 of the
Internal Revenue Code or any predecessor provision thereof or any similar
provision of state, local or foreign law; or (B) has not agreed to or is
required to make any adjustments pursuant to Section 481 (a) of the Internal
Revenue Code or any similar provision of state, local or foreign law by reason
of a change in accounting method initiated by the Company or any of its
subsidiaries or has any knowledge that the IRS has proposed any such adjustment
or change in accounting method, or has any application pending with any taxing
authority requesting permission for any changes in accounting methods that
relate to the business or operations of the Company. The Company has not been a
United States real property holding corporation within the meaning of Section
897(c)(2) of the Internal Revenue Code during the applicable period specified in
Section 897(c)(1)(A)(ii) of the Internal Revenue Code.

         3.    The Company has not made an election under Section 341(f) of the
Internal Revenue Code. The Company is not liable for the Taxes of another person
that is not a subsidiary of the Company under (A) Treas. Reg. Section 1.1502-6
(or comparable provisions of state, local or foreign law), (B) as a transferee
or successor, (C) by contract or indemnity or (D) otherwise. The Company is not
a party to any tax sharing agreement. The Company has not made any payments, is
obligated to make payments or is a party to an agreement that could obligate it
to make any payments that would not be deductible under Section 280G of the
Internal Revenue Code.

         For purposes of this Section 4.21:

         "IRS" means the United States Internal Revenue Service.



                                       15
<PAGE>   16


         "Tax" or "Taxes" means federal, state, county, local, foreign, or other
income, gross receipts, ad valorem, franchise, profits, sales or use, transfer,
registration, excise, utility, environmental, communications, real or personal
property, capital stock, license, payroll, wage or other withholding,
employment, social security, severance, stamp, occupation, alternative or add-on
minimum, estimated and other taxes of any kind whatsoever (including, without
limitation, deficiencies, penalties, additions to tax, and interest attributable
thereto) whether disputed or not.

         "Tax Return" means any return, information report or filing with
respect to Taxes, including any schedules attached thereto and including any
amendment thereof.

Section 4.22.  Property. Neither the Company nor either of its subsidiaries owns
any real property. Each of the Company and its subsidiaries has good and
marketable title to all personal property owned by it, free and clear of all
liens, encumbrances and defects except such as do not materially affect the
value of such property and do not materially interfere with the use made and
proposed to be made of such property by the Company; and any real property and
buildings held under lease by the Company are held by it under valid, subsisting
and enforceable leases with such exceptions as are not material and do not
interfere with the use made and proposed to be made of such property and
buildings by the Company.

Section 4.23.  Intellectual Property. Each of the Company and its subsidiaries
owns or possesses adequate and enforceable rights to use all patents, patent
applications, trademarks, trademark applications, trade names, service marks,
copyrights, copyright applications, licenses, know-how (including trade secrets
and other unpatented and/or unpatentable proprietary or confidential
information, systems or procedures) and other similar rights and proprietary
knowledge (collectively, "Intangibles") necessary for the conduct of its
business as now being conducted. To the best of the Company's knowledge, neither
the Company nor any of its subsidiaries is infringing upon or in conflict with
any right of any other person with respect to any Intangibles. No claims have
been asserted by any person to the ownership or use of any Intangibles and the
Company has no knowledge of any basis for such claim.

Section 4.24.  Internal Controls and Procedures. The Company maintains accurate
books and records and internal accounting controls which provide reasonable
assurance that (i) all transactions to which the Company is a party or by which
its properties are bound are executed with management's authorization; (ii) the
reported accountability of the Company's assets is compared with existing assets
at regular intervals; (iii) access to the Company's assets is permitted only in
accordance with management's authorization; and (iv) all transactions to which
the Company is a party or by which its properties are bound are recorded as
necessary to permit preparation of the financial statements of the Company in
accordance with U.S. generally accepted accounting principles.

Section 4.25.  Payments and Contributions. Neither the Company nor any of its
directors, officers or, to its knowledge, other employees has (i) used any
Company funds for any unlawful contribution, endorsement, gift, entertainment or
other unlawful expense relating to political activity; (ii) made



                                       16
<PAGE>   17


any direct or indirect unlawful payment of Company funds to any foreign or
domestic government official or employee; (iii) violated or is in violation of
any provision of the Foreign Corrupt Practices Act of 1977, as amended; or (iv)
made any bribe, rebate, payoff, influence payment, kickback or other similar
payment to any person with respect to Company matters.

Section 4.26.  Year 2000 Compliance. The Company has reviewed the Year 2000 Risk
and is taking such action as may be necessary to ensure that the Year 2000 Risk
will not adversely affect its business operations and/or financial condition. As
used herein, "Year 2000 Risk" means the risk that computer applications used by
the Company and its Subsidiaries and/or its suppliers, vendors, and customers
may be unable to recognize and perform without error date-sensitive functions
involving certain dates prior to and any date after December 31, 1999.

Section 4.27   Related Party Transactions. Except as disclosed in the SEC
Documents, neither the Company nor any of its officers, directors or
"Affiliates" (as such term is defined in Rule 12b-2 under the Exchange Act) has
borrowed any moneys from or has outstanding any indebtedness or other similar
obligations to the Company. Except as disclosed in the SEC Documents, neither
the Company nor any of its officers, directors or Affiliates (i) owns any direct
or indirect interest constituting more than a one percent equity (or similar
profit participation) interest in, or controls or is a director, officer,
partner, member or employee of, or consultant to or lender to or borrower from,
or has the right to participate in the profits of, any person or entity which is
(x) a competitor, supplier, customer, landlord, tenant, creditor or debtor of
the Company or any of its subsidiaries, (y) engaged in a business related to the
business of the Company or any of its subsidiaries, or (z) a participant in any
transaction to which the Company is a party (other than in the ordinary course
of the Company's business) or (ii) is a party to any contract, agreement,
commitment or other arrangement with the Company.

Section 4.28.  No Misrepresentation. No representation or warranty of the
Company contained in this Agreement, any schedule, annex or exhibit hereto or
any agreement, instrument or certificate furnished by the Company to the
Investors pursuant to this Agreement, contains any untrue statement of a
material fact or omits to state a material fact required to be stated therein or
necessary to make the statements therein, not misleading.

                                    ARTICLE V

                            COVENANTS OF THE INVESTOR

Section 5.1.   Compliance with Law. The Investor's trading activities with
respect to shares of the Company's Common Stock will be in compliance with all
applicable state and federal securities laws, rules and regulations and rules
and regulations of the Principal Market on which the Company's Common Stock is
listed.



                                       17
<PAGE>   18


Section 5.2.   Short Sales. The Investor and its affiliates shall not engage in
short sales of the Company's Common Stock; provided, however, that the Investor
may enter into any short sale or other hedging or similar arrangement it deems
appropriate with respect to Conversion Shares commencing on the day it delivers
a Conversion Notice with respect to such Conversion Shares, so long as such
arrangements do not involve more than the number of such Conversion Shares
(determined as of the date of such Conversion Notice).

                                   ARTICLE VI

                            COVENANTS OF THE COMPANY

Section 6.1.   Registration Rights. The Company shall cause the Registration
Rights Agreement to remain in full force and effect and the Company shall comply
in all material respects with the terms thereof.

Section 6.2.   Reservation of Common Stock. As of the date hereof, the Company
has reserved and the Company shall continue to reserve and keep available at all
times, free of preemptive rights, shares of Common Stock for the purpose of
enabling the Company to satisfy any obligation to issue the Conversion Shares
and the Warrant Shares; such amount of shares of Common Stock to be reserved
shall be calculated based upon the Market Price therefor under the terms of this
Agreement and the Warrant, respectively, assuming for purposes of this Section
6.2 a Market Price of $1.00 and shall be increased by the Board of Directors if
the Market Price declines below $1.00. The number of shares so reserved from
time to time, as theretofore increased or reduced as hereinafter provided, may
be reduced by the number of shares actually delivered hereunder and the number
of shares so reserved shall be increased or decreased to reflect potential
increases or decreases in the Common Stock that the Company may thereafter be so
obligated to issue by reason of adjustments to the Warrant.

Section 6.3.   Listing of Common Stock. The Company hereby agrees to maintain
the listing of the Common Stock on a Principal Market, and as soon as
practicable (but in any event prior to the date upon which the Preferred Stock
may be converted into Common Stock) to list the Conversion Shares and the
Warrant Shares. The Company further agrees, if the Company applies to have the
Common Stock traded on any other Principal Market, it will include in such
application the Conversion Shares and the Warrant Shares, and will take such
other action as is necessary or desirable in the opinion of the investor to
cause the Common Stock to be listed on such other Principal Market as promptly
as possible. The Company will take all action to continue the listing and
trading of its Common Stock on the Principal Market (including, without
limitation, maintaining sufficient net tangible assets) and will comply in all
respects with the Company's reporting, filing and other obligations under the
bylaws or rules of the Principal Market and shall provide Investor with copies
of any correspondence to or from such Principal Market which questions or
threatens delisting of the Common Stock, within one business day of the
Company's receipt thereof.



                                       18
<PAGE>   19


Section 6.4.   Exchange Act Registration. The Company will cause its Common
Stock to continue to be registered under Section 12(b) or (g) of the Exchange
Act, will use its best efforts to comply in all respects with its reporting and
filing obligations under the Exchange Act, and will not take any action or file
any document (whether or not permitted by the Exchange Act or the rules
thereunder) to terminate or suspend such registration or to terminate or suspend
its reporting and filing obligations under said Act.

Section 6.5.   Legends. Upon conversion, the certificates evidencing the Common
Stock to be sold by the Investor pursuant to Section 9.1 shall be free of
legends, except as set forth in Article IX.

Section 6.6.   Corporate Existence. The Company will take all steps necessary to
preserve and continue the corporate existence of the Company.

Section 6.7.   Notice of Certain Events Affecting Registration. The Company will
immediately notify the Investor upon the occurrence of any of the following
events in respect of a registration statement or related prospectus in respect
of an offering of Registrable Securities; (i) receipt of any request for
additional information by the SEC or any other federal or state governmental
authority during the period of effectiveness of the Registration Statement to be
supplied by amendments or supplements to the registration statement or related
prospectus; (ii) the issuance by the SEC or any other federal or state
governmental authority of any stop order suspending the effectiveness of the
Registration Statement or the initiation of any proceedings for that purpose;
(iii) receipt of any notification with respect to the suspension of the
qualification or exemption from qualification of any of the Registrable
Securities for sale in any jurisdiction or the initiation or threatening of any
proceeding for such purpose; (iv) the happening of any event that makes any
statement made in the Registration Statement or related prospectus or any
document incorporated or deemed to be incorporated therein by reference untrue
in any material respect or that requires the making of any changes in the
Registration Statement, related prospectus or documents so that, in the case of
the Registration Statement, it will not contain any untrue statement of a
material fact or omit to state any material fact required to be stated therein
or necessary to make the statements therein not misleading, and that in the case
of the related prospectus, it will not contain any untrue statement of a
material fact or omit to state any material fact required to be stated therein
or necessary to make the statements therein, in the light of the circumstances
under which they were made, not misleading; and (v) the Company's reasonable
determination that a post-effective amendment to the Registration Statement
would be appropriate; and the Company will promptly make available to the
Investor any such supplement or amendment to the related prospectus.

         (a)   Consolidation; Merger. The Company shall not, at any time after
the date hereof, effect any merger or consolidation of the Company with or into,
or a transfer of all or substantially all of the assets of the Company to,
another entity (a "Consolidation Event") unless the resulting successor or
acquiring entity (if not the Company) assumes by written instrument or by
operation of law the obligation to deliver to the Investor such shares of stock
and/or securities as the Investor is entitled to receive pursuant to this
Agreement.



                                       19
<PAGE>   20


Section 6.8.   Issuance of Preferred Shares and Warrant Shares. The sale of the
Preferred Stock and the issuance of the Warrant Shares pursuant to exercise of
the Warrant and the Conversion Shares upon conversion of the Preferred Stock
shall be made in accordance with the provisions and requirements of Section 4(2)
of Regulation D and any applicable state securities law. The Company shall make
all necessary SEC and "blue sky" filings required to be made by the Company in
connection with the sale of the Securities to the Investor as required by all
applicable Laws, and shall provide a copy thereof to the Investor promptly after
such filing.

Section 6.9    Limitation on Future Financing. The Company agrees that it will
not, without the consent of 85% in interest of the Investors, enter into any
financing at a discount to Market Price until six months after the effective
date of the Registration Statement; provided, however, anything to the contrary
appearing herein notwithstanding, neither this Section nor any other provision
hereof shall be construed to restrict or prohibit the Company's right to
restructure, amend or modify any facility existing on the date hereof that does
not materially impair the rights of the holders of the Preferred Stock.

                                   ARTICLE VII

                       SURVIVAL; INDEMNIFICATION; RELEASE

Section 7.1.   Survival. The representations, warranties and covenants made by
each of the Company and Investor in this Agreement, the annexes, schedules and
exhibits hereto and in each instrument, agreement and certificate entered into
and delivered by them pursuant to this Agreement, shall survive the Closing and
the consummation of the transactions contemplated hereby. In the event of a
breach or violation of any of such representations, warranties or covenants, the
party to whom such representations, warranties or covenants have been made shall
have all rights and remedies for such breach or violation available to it under
the provisions of this Agreement or otherwise, whether at law or in equity,
irrespective of any investigation made by or on behalf of such party on or prior
to the Closing Date.

Section 7.2.   Indemnity. The Company hereby agrees to indemnify and hold
harmless the Investor, its Affiliates and their respective officers, directors,
partners and members (collectively, the "Investor Indemnitees"), from and
against any and all losses, claims, damages, judgments, penalties, liabilities
and deficiencies (collectively, "Losses"), and agrees to reimburse the Investor
Indemnitees for all out-of-pocket expenses (including the fees and expenses of
legal counsel and the cost of any investigation and preparation), in each case
promptly as incurred by the Investor Indemnitees and to the extent arising out
of or in connection with:

               1.     any misrepresentation, omission of fact or breach of any
         of the Company's representations or warranties contained in this
         Agreement, the annexes, schedules or exhibits hereto or any instrument,
         agreement or certificate entered into or delivered by the Company
         pursuant to this Agreement;



                                       20
<PAGE>   21


               2.     any failure by the Company to perform in any material
         respect any of its covenants, agreements, undertakings or obligations
         set forth in this Agreement, the annexes, schedules or exhibits hereto
         or any instrument, agreement or certificate entered into or delivered
         by the Company pursuant to this Agreement; or

               3.     any litigation directly against the Investor by
         non-affiliates of the Company relating to this Agreement
         and the transactions contemplated hereby.

               Investor hereby agrees to indemnify and hold harmless the
Company, its Affiliates and their respective officers, directors, partners and
members (collectively, the "Company Indemnitees"), from and against any and all
Losses, and agrees to reimburse the Company Indemnitees for all out-of-pocket
expenses (including the fees and expenses of legal counsel and the cost of any
investigation and preparation), in each case promptly as incurred by the Company
Indemnitees and to the extent arising out of or in connection with:

               1.     any misrepresentation, omission of fact, or breach of any
of Investor's representations or warranties contained in this Agreement, the
annexes, schedules or exhibits hereto or any instrument, agreement or
certificate entered into or delivered by Investor pursuant to this Agreement; or

               2.     any failure by Investor to perform in any material respect
any of its covenants, agreements, undertakings or obligations set forth in this
Agreement or any instrument, certificate or agreement entered into or delivered
by Investor pursuant to this Agreement.

Section 7.3.   Notice. Promptly after receipt by either party hereto seeking
indemnification pursuant to Section 7.2 (an "Indemnified Party") of written
notice of any investigation, claim, proceeding or other action in respect of
which indemnification is being sought (each, a "Claim"), the Indemnified Party
promptly shall notify the party against whom indemnification pursuant to Section
7.2 is being sought (the "Indemnifying Party") of the commencement thereof; but
the omission to so notify the Indemnifying Party shall not relieve it from any
liability that it otherwise may have to the Indemnified Party, except to the
extent that the Indemnifying Party is materially prejudiced and forfeits
substantive rights and defenses by reason of such failure. In connection with
any Claim as to which both the Indemnifying Party and the Indemnified Party are
parties, the Indemnifying Party shall be entitled to assume the defense thereof.
Notwithstanding the assumption of the defense of any Claim by the Indemnifying
Party, the Indemnified Party shall have the right to employ separate legal
counsel and to participate in the defense of such Claim, and the Indemnifying
Party shall bear the reasonable fees, out-of-pocket costs and expenses of such
separate legal counsel to the Indemnified Party if (and only if): (x) the
Indemnifying Party shall have agreed to pay such fees, out-of-pocket costs and
expenses, (y) the Indemnified Party and the Indemnifying Party reasonably shall
have concluded that representation of the Indemnified Party and the Indemnifying
Party by the same legal counsel would not be appropriate due to actual or, as
reasonably determined by legal counsel to the Indemnified Party, potentially
differing interests between such parties in the conduct of the defense of such
Claim, or if there may be legal defenses



                                       21
<PAGE>   22


available to the Indemnified Party that are in addition to or disparate from
those available to the Indemnifying Party, or (z) the Indemnifying Party shall
have failed to employ legal counsel reasonably satisfactory to the Indemnified
Party within a reasonable period of time after notice of the commencement of
such Claim. If the Indemnified Party employs separate legal counsel in
circumstances other than as described in clauses (x), (y) or (z) above, the
fees, costs and expenses of such legal counsel shall be borne exclusively by the
Indemnified Party. Except as provided above, the Indemnifying Party shall not,
in connection with any Claim in the same jurisdiction, be liable for the fees
and expenses of more than one firm of legal counsel for the Indemnified Party
(together with appropriate local counsel). The Indemnifying Party shall not,
without the prior written consent of the Indemnified Party (which consent shall
not unreasonably be withheld), settle or compromise any Claim or consent to the
entry of any judgment that does not include an unconditional release of the
Indemnified Party from all liabilities with respect to such Claim or judgment.

Section 7.4.   Direct Claims. In the event one party hereunder should have a
claim for indemnification that does not involve a claim or demand being asserted
by a third party, the Indemnified Party promptly shall deliver notice of such
claim to the Indemnifying Party. If the Indemnified Party disputes the claim,
such dispute shall be resolved by mutual agreement of the Indemnified Party and
the Indemnifying Party.


                                  ARTICLE VIII

          DILIGENCE REVIEW; NON-DISCLOSURE OF NON-PUBLIC INFORMATION.

Section 8.1. Due Diligence Review. The Company shall make available for
inspection and review by the Investor, advisors to and representatives of the
Investor (who may or may not be affiliated with the Investor and who are
reasonably acceptable to the Company), any underwriter participating in any
disposition of the Registrable Securities on behalf of the Investor pursuant to
the Registration Statement, any such registration statement or amendment or
supplement thereto or any blue sky, NASD or other filing, all SEC Documents and
other filings with the SEC, and all other publicly available corporate documents
and properties of the Company as may be reasonably necessary for the purpose of
such review, an d cause the Company's officers, directors and employees to
supply all such publicly available information reasonably requested by the
Investor or any such representative, advisor or underwriter in connection with
such Registration Statement (including, without limitation, in response to all
questions and other inquiries reasonably made or submitted by any of them),
prior to and from time to time after the filing and effectiveness of the
Registration Statement for the sole purpose of enabling the Investor and such
representatives, advisors and underwriters and their respective accountants and
attorneys to conduct initial and ongoing due diligence with respect to the
Company and the accuracy of the Registration Statement.





                                       22
<PAGE>   23


Section 8.2.   Non-Disclosure of Non-Public Information

         (a)   The Company shall not disclose non-public information to the
Investor, advisors to or representatives of the Investor unless prior to
disclosure of such information the Company identifies such information as being
non-public information and provides the Investor, such advisors and
representatives with the opportunity to accept or refuse to accept such
non-public information for review. Other than disclosure of any comment letters
received from the SEC staff with respect to the Registration Statement, the
Company may, as a condition to disclosing any non-public information hereunder,
require the Investor's advisors and representatives to enter into a
confidentiality agreement in form reasonably satisfactory to the Company and the
Investor.

         (b)   Nothing herein shall require the Company to disclose non-public
information to the Investor or its advisors or representatives, and the Company
represents that it does not disseminate non-public information to any investors
who purchase stock in the Company in a public offering, to money managers or to
securities analysts, provided, however, that notwithstanding anything herein to
the contrary, the Company will, as hereinabove provided, immediately notify the
advisors and representatives of the Investor and, if any, underwriters, of any
event or the existence of any circumstance (without any obligation to disclose
the specific event or circumstance) of which it becomes aware, constituting
non-public information (whether or not requested of the Company specifically or
generally during the course of due diligence by such persons or entities),
which, if not disclosed in the prospectus included in the Registration Statement
would cause such prospectus to include a material misstatement or to omit a
material fact required to be stated therein in order to make the statements,
therein in light of the circumstances in which they were made, not misleading.
Nothing contained in this Section 8.2 shall be construed to mean that such
persons or entities other than the Investor (without the written consent of the
Investor prior to disclosure of such information) may not obtain non-public
information in the course of conducting due diligence in accordance with the
terms of this Agreement and nothing herein shall prevent any such persons or
entities from notifying the Company of their opinion that based on such due
diligence by such persons or entities, that the Registration Statement contains
an untrue statement of a material fact or omits a material fact required to be
stated in the Registration Statement or necessary to make the statements
contained therein, in light of the circumstances in which they were made, not
misleading.

                                   ARTICLE IX

                                     LEGENDS

Section 9.1.   Legends. Unless otherwise provided below, each certificate
representing Registrable Securities will bear the following legend or equivalent
(the "Legend"):

THE SECURITIES EVIDENCED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE
U.S. SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY OTHER
APPLICABLE SECURITIES LAWS AND HAVE BEEN ISSUED IN RELIANCE UPON AN EXEMPTION
FROM THE REGISTRATION REQUIREMENTS OF THE



                                       23
<PAGE>   24


SECURITIES ACT AND SUCH OTHER SECURITIES LAWS. NEITHER THIS SECURITY NOR ANY
INTEREST OR PARTICIPATION HEREIN MAY BE REOFFERED, SOLD, ASSIGNED, TRANSFERRED,
PLEDGED, ENCUMBERED, HYPOTHECATED OR OTHERWISE DISPOSED OF, EXCEPT PURSUANT TO
AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR PURSUANT TO A
TRANSACTION THAT IS EXEMPT FROM, OR NOT SUBJECT TO, SUCH REGISTRATION.

Upon the execution and delivery hereof, the Company is issuing to the transfer
agent for its Common Stock (and to any substitute or replacement transfer agent
for its Common Stock upon the Company's appointment of any such substitute or
replacement transfer agent) instructions in substantially the form of Exhibit E
hereto. Such instructions shall be irrevocable by the Company from and after the
date hereof or from and after the issuance thereof to any such substitute or
replacement transfer agent, as the case may be, except as otherwise expressly
provided in the Registration Rights Agreement. It is the intent and purpose of
such instructions, as provided therein, to require the transfer agent for the
Common Stock from time to time upon transfer of Registrable Securities by the
Investor to issue certificates evidencing such Registrable Securities free of
the Legend during the following periods and under the following circumstances
and without consultation by the transfer agent with the Company or its counsel
and without the need for any further advice or instruction or documentation to
the transfer agent by or from the Company or its counsel or the Investor:

         (a)   at any time after the Effective Date, upon surrender of one or
more certificates evidencing Common Stock that bear the Legend, to the extent
accompanied by a notice requesting the issuance of new certificates free of the
Legend to replace those surrendered; provided that (i) the Registration
Statement shall then be effective; (ii) the Investor confirms to the transfer
agent that it has sold, pledged or otherwise transferred or agreed to sell,
pledge or otherwise transfer such Common Stock in a bona fide transaction to a
third party that is not an affiliate of the Company; and (iii) the Investor
confirms to the transfer agent that the Investor has complied with the
prospectus delivery requirement.

         (b)   at any time upon any surrender of one or more certificates
evidencing Registrable Securities that bear the Legend, to the extent
accompanied by a notice requesting the issuance of new certificates free of the
Legend to replace those surrendered and containing representations that (i) the
Investor is permitted to dispose of such Registrable Securities without
limitation as to amount or manner of sale pursuant to Rule 144(k) under the
Securities Act or (ii) the Investor has sold, pledged or otherwise transferred
or agreed to sell, pledge or otherwise transfer such Registrable Securities in a
manner other than pursuant to an effective registration statement, to a
transferee who will upon such transfer be entitled to freely tradeable
securities.

Any of the notices referred to above in this Section 9.1 may be sent by
facsimile to the Company's transfer agent.



                                       24
<PAGE>   25


Section 9.2.   No Other Legend or Stock Transfer Restrictions. No legend other
than the one specified in Section 9.1 has been or shall be placed on the share
certificates representing the Common Stock and no instructions or "stop transfer
orders," so called, "stock transfer restrictions," or other restrictions have
been or shall be given to the Company's transfer agent with respect thereto
other than as expressly set forth in this Article IX.

Section 9.3.   Investor's Compliance. Nothing in this Article shall affect in
any way the Investor' s obligations under any agreement to comply with all
applicable securities laws upon resale of the Common Stock.

                                    ARTICLE X

                                  CHOICE OF LAW

Section 10.1.  Governing Law. This Agreement shall be governed by and construed
in accordance with the laws of the State of New York without regard to the
conflicts of law principles of such state. Each party hereto hereby submits to
the exclusive jurisdiction of the United States District Court for the Southern
District of New York and of any New York State Court sitting in New York City
for purposes of all legal proceedings arising out of or relating to this
Agreement or the transactions contemplated hereby. Each party hereto irrevocably
waives, to the fullest extent permitted by law, any objection which it may now
or hereafter have to the laying of the venue of any such proceeding brought in
such a court has been brought in an inconvenient forum. Each party hereto hereby
irrevocably waives any and all right to trial by jury in any legal proceeding
arising out of or relating to this Agreement or the transactions contemplated
hereby.

                                   ARTICLE XI

                          ASSIGNMENT; ENTIRE AGREEMENT

Section 11.1.  Assignment. Neither this Agreement nor any rights of the Investor
or the Company hereunder may be assigned by either party to any other person.
Notwithstanding the foregoing, (a) the provisions of this Agreement shall inure
to the benefit of, and be enforceable by, any transferee of any of the Preferred
Stock purchased or acquired by the Investor hereunder with respect to the
Preferred Stock held by such person, and (b) upon the prior written consent of
the Company, which consent shall not unreasonably be withheld or delayed, the
Investor's interest in this Agreement may be assigned at any time, in whole or
in part, to any other person or entity (including any affiliate of the Investor)
who agrees to make the representations and warranties contained in Article III
and who agrees to be bound by the covenants of Article V.



                                       25
<PAGE>   26


                                   ARTICLE XII

                                     NOTICES

Section 12.1.  Notices. All notices, demands, requests, consents, approvals, and
other communications required or permitted hereunder shall be in writing and,
unless otherwise specified herein, shall be (i) personally served, (ii)
deposited in the mail, registered or certified, return receipt requested,
postage prepaid, (iii) delivered by reputable air courier service with charges
prepaid, or (iv) transmitted by hand delivery, telegram, or facsimile, addressed
as set forth below or to such other address as such party shall have specified
most recently by written notice. Any notice or other communication required or
permitted to be given hereunder shall be deemed effective (a) upon hand delivery
or delivery by facsimile, with accurate confirmation generated by the
transmitting facsimile machine, at the address or number designated below (if
delivered on a business day during normal business hours where such notice is to
be received), or the first business day following such delivery (if delivered
other than on a business day during normal business hours where such notice is
to be received) or (b) on the second business day following the date of mailing
by reputable courier service, fully prepaid, addressed to such address, or upon
actual receipt of such mailing, whichever shall first occur. The addresses for
such communications shall be:


If to the Company:                    Integrated Surgical Systems, Inc.
                                      1850 Research Park Drive
                                      Davis, CA  95616-4884
                                      Attention: Ramesh C. Trivedi
                                      Telephone: (530) 792-2600
                                      Facsimile:  (530) 792-2690


with a copy to:
(shall not constitute notice)         Snow  Becker Krauss P.C.
                                      605 Third Avenue
                                      New York, NY 10158
                                      Attention:  Jack Becker
                                      Telephone: (212) 687-3860
                                      Facsimile:  (212) 949-7052

if to the Investor:                   As set forth on the signature page hereto.


Either party hereto may from time to time change its address or facsimile number
for notices under this Section 12.1 by giving at least ten (10) days' prior
written notice of such changed address or facsimile number to the other party
hereto.



                                       26
<PAGE>   27


                                  ARTICLE XIII

                                   TERMINATION

Section 13.1.  Termination by Mutual Written Consent. This Agreement may be
terminated and the transactions contemplated hereby may be abandoned, for any
reason and at any time prior to the Closing Date, by the mutual written consent
of the Company and the Investor.

Section 13.2.  Termination by the Company or the Investors. This Agreement may
be terminated and the transactions contemplated hereby may be abandoned by
action of the Company or the Investors if (i) the Closing shall not have
occurred at or prior to 5:00 p.m., New York City time, on February 15, 2000;
provided, however, that the right to terminate this Agreement pursuant to this
Section 13.2 shall not be available to any party whose failure to fulfill any of
its obligations under this Agreement has been the cause of or resulted in the
failure of the Closing to occur at or before such time and date or (ii) any
court or public or governmental authority shall have issued an order, ruling,
judgment or writ, or there shall be in effect any law, restraining, enjoining or
otherwise prohibiting the consummation of any of the transactions contemplated
by this Agreement.

Section 13.3.  Termination by the Investors. This Agreement may be terminated
and the transactions contemplated hereby may be abandoned by the Investors at
any time prior to the Closing Date, if (i) the Company shall have failed to
comply in any material respect with any of its covenants or agreements contained
in this Agreement, (ii) there shall have been a breach by the Company with
respect to any representation or warranty made by it in this Agreement or (iii)
there shall be in existence any condition, having or reasonably and forseeably
likely to have a Material Adverse Effect.

Section 13.4.  Termination by the Company. This Agreement may be terminated and
the transactions contemplated hereby may be abandoned by the Company at any time
prior to the Closing Date, if (i) the Investors shall have failed to comply in
any material respect with any of their respective covenants or agreements
contained in this Agreement or (ii) there shall have been a breach by the
Investors with respect to any representation or warranty made by them in this
Agreement.

Section 13.5.  Fees and Expenses of Termination. If this Agreement is terminated
for any reason, the Company shall reimburse the Investors for all of the
Investor's out-of-pocket costs and expenses incurred in connection with the
transactions contemplated by this Agreement (including, but not limited to, the
fees and disbursements of Investor's legal counsel as set forth in Section
14.7).

                                   ARTICLE XIV

                                  MISCELLANEOUS

Section 14.1.  Counterparts/ Facsimile/ Amendments. This Agreement may be
executed in multiple counterparts, each of which may be executed by less than
all of the parties and shall be deemed to



                                       27
<PAGE>   28


be an original instrument which shall be enforceable against the parties
actually executing such counterparts and all of which together shall constitute
one and the same instrument. Except as otherwise stated herein, in lieu of the
original documents, a facsimile transmission or copy of the original documents
shall be as effective and enforceable as the original. This Agreement may be
amended only by a writing executed by all parties.


Section 14.2.  Entire Agreement. This Agreement, the Exhibits hereto, which
include, but are not limited to the Warrant, and the Registration Rights
Agreement, set forth the entire agreement and understanding of the parties
relating to the subject matter hereof and supersedes all prior and
contemporaneous agreements, negotiations and understandings between the parties,
both oral and written relating to the subject matter hereof. The terms and
conditions of all Exhibits to this Agreement are incorporated herein by this
reference and shall constitute part of this Agreement as is fully set forth
herein.

Section 14.3.  Survival; Severability. The representations, warranties,
covenants and agreements of the parties hereto shall survive each Closing
hereunder. In the event that any provision of this Agreement becomes or is
declared by a court of competent jurisdiction to be illegal, unenforceable or
void, this Agreement shall continue in full force and effect without said
provision; provided that such severability shall be ineffective if it materially
changes the economic benefit of this Agreement to any party.

Section 14.4.  Title and Subtitles. The titles and subtitles used in this
Agreement are used for convenience only and are not to be considered in
construing or interpreting this Agreement.

Section 14.5.  Reporting Entity for the Common Stock. The reporting entity
relied upon for the determination of the trading price or trading volume of the
Common Stock on any given Trading Day for the purposes of this Agreement shall
be Bloomberg, L.P. or any successor thereto. The written mutual consent of the
Investor and the Company shall be required to employ any other reporting entity.

Section 14.6.  Replacement of Certificates. Upon (i) receipt of evidence
reasonably satisfactory to the Company of the loss, theft, destruction or
mutilation of a certificate representing the Preferred Stock or any Conversion
Shares or Warrant or any Warrant Shares and (ii) in the case of any such loss,
theft or destruction of such certificate, upon delivery of an indemnity
agreement or security reasonably satisfactory in form and amount to the Company
(which shall not exceed that required by the Company's transfer agent in the
ordinary course) or (iii) in the case of any such mutilation, on surrender and
cancellation of such certificate, the Company at its expense will execute and
deliver, in lieu thereof, a new certificate of like tenor.

Section 14.7.  Fees and Expenses. Each of the Company and the Investor agrees to
pay its own expenses incident to the performance of its obligations hereunder,
except that the Company shall pay the fees, expenses and disbursements of
Investor's counsel in an amount not to exceed $3,000.


                                       28
<PAGE>   29


Section 14.8.  Brokerage or Financial Advisory Fees. Each of the parties hereto
represents that it has had no dealings in connection with this transaction with
any broker or financial advisor who will demand payment of any fee or commission
from the other party except for Trinity Capital Advisors, Inc., which has
furnished financial advisory services to the Company and whose fee shall be paid
by the Company. The Company on the one hand, and the Investor, on the other
hand, agree to indemnify the other against and hold the other harmless from any
and all liabilities to any person claiming brokerage commissions or finder's
fees on account of services purported to have been rendered on behalf of the
indemnifying party in connection with this Agreement or the transactions
contemplated hereby.

               IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be executed by the undersigned, thereunto duly authorized, as of
the date first set forth above.



<TABLE>
<S>                                            <C>
                                               INTEGRATED SURGICAL SYSTEMS, INC.




                                               By:    /s/ Ramesh C. Trivedi
                                                      -------------------------------------
                                                      Ramesh C. Trivedi
                                                      Chief Executive Officer and President


Jurisdiction of Incorporation
  of Investor:                                 INVESTOR
              ------------------------
Address:                                       Name:
         -----------------------------                ----------------------------------
                                               By:
         -----------------------------                ----------------------------------
                                               Title:
         -----------------------------                ----------------------------------
                                                              Authorized Signatory
         -----------------------------

Telephone:
          ----------------------------
Telecopier:
           ---------------------------

Amount of investment: $
                      ----------------
</TABLE>



                                       29


<PAGE>   30


                                                                       EXHIBIT A

                          CERTIFICATE OF DESIGNATIONS,

                            PREFERENCES AND RIGHTS OF

                     SERIES F CONVERTIBLE PREFERRED STOCK OF

                        INTEGRATED SURGICAL SYSTEMS, INC.

                     PURSUANT TO SECTION 151 OF THE DELAWARE

                             GENERAL CORPORATION LAW

               Integrated Surgical Systems, Inc., a corporation organized and
existing under and by virtue of the General Corporation Law of the State of
Delaware (hereinafter the "Corporation"), in accordance with the provisions of
Section 151(g) thereof, DOES HEREBY CERTIFY that at a meeting of the Board of
Directors of the Corporation duly held on January 24, 2000:

         FIRST: The following resolution was duly adopted by the Board of
Directors of the Corporation:

         "RESOLVED: That pursuant to the authority vested in the Board of
Directors of the Corporation by Article 4 of the Corporation's restated
certificate of incorporation, as amended (the "Certificate of Incorporation"), a
series of Preferred Stock of the Corporation be, and it hereby is, created out
of the authorized but unissued shares of the capital stock of the Corporation,
such series to be designated Series F Convertible Preferred Stock (the "Series F
Convertible Preferred Stock"), to consist of 2,000 shares, par value $0.01 per
share, of which the preferences and relative and other rights, and the
qualifications, limitations or restrictions thereof, shall be as set forth in
the Certificate of Designations annexed hereto:

         1.    NUMBER OF SHARES OF SERIES F CONVERTIBLE PREFERRED STOCK. Of the
989,730 shares of authorized but unissued Preferred Stock, $0.01 par value
("Preferred Stock") of the Corporation, two thousand (2,000) shares shall be
designated and known as Series F Convertible Preferred Stock, par value $0.01
per share ("Series F Convertible Preferred Stock").

         2.    VOTING.

               (a)    Unless required by law, no holder of any shares of Series
F Convertible Preferred Stock shall be entitled to vote at any meeting of
stockholders of the Corporation (or any written actions of stockholders in lieu
of meetings) with respect to any matters presented to the stockholders of the
Corporation for their action or consideration. Notwithstanding the foregoing,
the Corporation shall provide each holder of record of Series F Convertible
Preferred Stock with timely



                                       1
<PAGE>   31



notice of every meeting of stockholders of the Corporation and shall provide
each holder with copies of all proxy materials distributed in connection
therewith.

               (b)    So long as shares of Series F Convertible Preferred Stock
are outstanding, the Corporation shall not, without first obtaining the approval
(by vote or written consent, as provided by the Delaware General Corporation
Law) of the holders of at least 85% of the then outstanding shares of Series F
Convertible Preferred Stock:

                      (i)     alter or change the rights, preferences or
privileges of the Series F Convertible Preferred  Stock;

                      (ii)    create any new class or series of capital stock
ranking on a parity with ("Pari Passu Securities") or a preference over the
Series F Convertible Preferred Stock as to distribution of assets upon
liquidation, dissolution or winding up of the Corporation ("Senior Securities")
or alter or change the rights, preferences or privileges of any Senior
Securities so as to affect adversely the Series F Convertible Preferred Stock;

                      (iii)   increase the authorized number of shares of Series
F Convertible Preferred Stock; or

                      (iv)    do any act or thing not authorized or contemplated
by this Certificate of Designations which would result in taxation of the
holders of shares of the Series F Convertible Preferred Stock under Section 305
of the Internal Revenue Code of 1986, as amended (or any comparable provision of
the Internal Revenue Code as hereafter from time to time amended).

               In the event holders of at least 85% of the then outstanding
shares of Series F Convertible Preferred Stock agree to allow the Corporation to
alter or change the rights, preferences or privileges of the shares of Series F
Convertible Preferred Stock, pursuant to subsection (b) above, so as to affect
the Series F Convertible Preferred Stock, then the Corporation will deliver
notice of such approved change to the holders of the Series F Convertible
Preferred Stock that did not agree to such alteration or change (the "Dissenting
Holders") and Dissenting Holders shall have the right for a period of thirty
(30) days to convert any and all shares of then held Series F Convertible
Preferred Stock pursuant to the terms of this Certificate of Designations as in
effect prior to such alteration or change, or else to continue to hold their
shares of Series F Convertible Preferred Stock.

         3.    DIVIDENDS

               No holder of any shares of Series F Convertible Preferred Stock
shall be entitled to receive any dividends.




                                       2
<PAGE>   32

         4.    LIQUIDATION.

               (a)    If the Corporation shall commence a voluntary case under
the Federal bankruptcy laws or any other applicable Federal or state bankruptcy,
insolvency or similar law, or consent to the entry of an order for relief in an
involuntary case under any law or to the appointment of a receiver, liquidator,
assignee, custodian, trustee, sequestrator (or other similar official) of the
Corporation or of any substantial part of its property, or make an assignment
for the benefit of its creditors, or admit in writing its inability to pay its
debts generally as they become due, or if a decree or order for relief in
respect of the Corporation shall be entered by a court having jurisdiction in
the premises in an involuntary case under the Federal bankruptcy laws or any
other applicable Federal or state bankruptcy, insolvency or similar law
resulting in the appointment of a receiver, liquidator, assignee, custodian,
trustee, sequestrator (or other similar official) of the Corporation or of any
substantial part of its property, or ordering the winding up or liquidation of
its affairs, and any such decree or order shall be unstayed and in effect for a
period of thirty (30) consecutive days and, on account of any such event, the
Corporation shall liquidate, dissolve or wind up, or if the Corporation shall
otherwise liquidate, dissolve or wind up (each such event being considered a
"Liquidating Event"), no distribution shall be made to the holders of any shares
of capital stock of the Corporation upon liquidation, dissolution or winding up
unless prior thereto, the holders of shares of Series F Convertible Preferred
Stock shall have received the Liquidation Preference (as defined in Paragraph
4(c)) with respect to each share. If upon the occurrence of a Liquidation Event,
the assets and funds available for distribution among the holders of the Series
F Convertible Preferred Stock and holders of Pari Passu Securities shall be
insufficient to permit the payment to such holders of the preferential amounts
payable thereon, then the entire assets and funds of the Corporation legally
available for distribution to the Series F Convertible Preferred Stock and the
Pari Passu Securities shall be distributed ratably among such shares in
proportion to the ratio that that Liquidation Preference payable on each such
share bears to the aggregate Liquidation Preference payable on all such shares.

               (b)    At the option of each holder of the Series F Convertible
Preferred Stock, the sale, conveyance of disposition of all or substantially all
of the assets of the Corporation, the effectuation by the Corporation of a
transaction or series or related transactions in which more than 50% of the
voting power of the Corporation is disposed of, or the consolidation, merger or
other business combination of the Corporation with or into any other Person or
Persons when the Corporation is not the survivor shall be deemed to be a
liquidation, dissolution or winding up of the Corporation pursuant to which the
Corporation shall be required to distribute, upon consummation of and as a
condition to such transaction an amount equal to the Liquidation Preference with
respect to each outstanding share of Series F Convertible Preferred Stock held
by such Holder in accordance with and subject to the terms of this Article 4.

               (c)    The Liquidation Preference shall be the Stated Value of
$1,000 per share of Series F Convertible Preferred Stock.

               (d)    The Series F Convertible Preferred Stock shall rank on a
parity with the Corporation's Series D Convertible Preferred Stock and Series E
Convertible Preferred Stock as



                                       3
<PAGE>   33

                                                                               4


to the distribution of the assets of the Corporation upon liquidation,
dissolution or winding up of the Corporation.

         5.    OPTIONAL CONVERSION.  The holders of shares of Series F
Convertible Preferred Stock shall have the following conversion rights:

               (a)    RIGHT TO CONVERT; CONVERSION PRICE. Subject to the terms,
conditions, and restrictions of this Paragraph 5, the holder of any shares of
Series F Convertible Preferred Stock shall have the right to convert each such
share of Series F Convertible Preferred Stock (except that upon any liquidation
of the Corporation, the right of conversion shall terminate at the close of
business on the business day fixed for payment of the amount distributable on
the Series F Convertible Preferred Stock) into a number of shares of Common
Stock equal to the Stated Value of such share or shares of Series F Convertible
Preferred Stock divided by (i) the lowest price at which a trade of the Common
Stock is executed, as reported by Bloomberg L.P., on the principal market for
the Corporation's Common Stock (the "Principal Market") during the period of
five Trading Days ending with the last Trading Day prior to the date of
conversion (the "Market Price"), after (ii) discounting the Market Price by 15%
to determine the conversion price (the "Conversion Price"). To illustrate, if
the Market Price as of the Conversion Date is $1.35 and 100 shares of Series F
Convertible Preferred Stock are being converted, the Stated Value for which
would be $100,000, then the Conversion Price shall be $1.15 per share of Common
Stock ($1.35 x .85), whereupon the Stated Value of $100,000 of Series F
Convertible Preferred Stock would entitle the holder thereof to convert the 100
shares of Series F Convertible Preferred Stock into 86,957 shares of Common
Stock ($100,000 divided by 1.15 equals 86,957). However, in no event shall the
Conversion Price be greater than $1.22 per share of Common Stock (the "Maximum
Conversion Price").The right of each holder to convert shares of Series F
Convertible Preferred Stock into shares of Common Stock is subject to the
limitations set forth in Paragraph 5(b) below, and for the purpose of complying
with the limitation set forth in Paragraph 5(b)(ii), shall be prorated among the
original purchasers of the shares of Series F Convertible Preferred Stock (the
"Initial Purchasers") and their subsequent transferees, if any, based upon the
number of shares of Series F Convertible Preferred Stock purchased by the
Initial Purchasers. In addition, instead of issuing shares of Common Stock upon
conversion, upon prior written notice to the holder, the Corporation may elect
to pay the holder an amount in cash equal to (i) the closing sale price on the
Principal Market on the day prior to the date of conversion (the "Conversion
Date") multiplied by (ii) the number of shares of Common Stock which would
otherwise be issuable to the holder upon such conversion, or any combination of
cash and shares of Common Stock. If notice of the Corporation's election to pay
the holder in cash is not received by the holder prior to the receipt by the
Corporation of a Conversion Notice, the Corporation shall pay the holder in
shares of Common Stock.



<PAGE>   34

                                                                               5


               (b)    NUMERICAL LIMITATIONS. (i) No shares of Series F
Convertible Preferred Stock may be converted into Common Stock, to the extent
that, after giving effect to the conversion and issuance of the Common Stock to
be issued pursuant to the applicable Conversion Notice (as defined in Paragraph
5(c) below), the total number of shares of Common Stock deemed beneficially
owned by the holder requesting conversion (other than by virtue of the ownership
of unconverted shares of Series F Convertible Preferred Stock or the ownership
of other securities that have limitations on a holder's rights to exchange,
convert or exercise similar to those limitations set forth herein), together
with all shares of Common Stock deemed beneficially owned by such holder's
Affiliates (as defined in Rule 405 of the Securities Act of 1933, as amended)
that would be aggregated for purposes of determining whether a group under
Section 13(d) of the Securities Exchange Act of 1934, as amended, and the rules
promulgated thereunder, would exceed 5% of the total issued and outstanding
shares of Common Stock. If any court of competent jurisdiction shall determine
that the foregoing limitation is ineffective to prevent a holder from being
deemed the beneficial owner of more than 5% of the then outstanding shares of
Common Stock, then the Corporation shall redeem so many of such holder's shares
of Series F Convertible Preferred Stock pursuant to Paragraph 7(a) hereof as are
necessary to cause such holder to be deemed the beneficial owner of not more
than 5% of the then outstanding shares of Common Stock.

                      (ii)    Unless the Corporation shall have obtained the
approval of its voting stockholders to such issuance, if required in accordance
with the rules of the Principal Market, the Corporation shall not issue shares
of Common Stock upon conversion of any shares of Series F Convertible Preferred
Stock if such issuance of Common Stock, when added to the number of shares of
Common Stock previously issued by the Corporation upon conversion of shares of
the Series F Convertible Preferred Stock, together with shares of Common Stock
issued and issuable upon exercise of warrants issued in connection with the sale
of shares of Series F Convertible Preferred Stock, would result in the issuance
of more than 19.9% of the number of shares of Common Stock which were issued and
outstanding on the date upon which the Series F Convertible Preferred Stock was
originally issued (the "Original Issuance Date"). To the extent the number of
shares of Common Stock issuable upon conversion would but for the limitation set
forth in this Paragraph 5(b)(ii) exceed such limit, the Corporation shall redeem
promptly (but not later than the fifth Trading Day after receipt of the
applicable Conversion Notice) the shares of Series F Convertible Preferred Stock
that may not be converted into shares of Common Stock as a result of such
limitation for an amount in cash equal to the greater of (i) $1,500 per share of
Series F Convertible Preferred Stock and (ii) an amount equal to the product of
the closing sale price of a share of Common Stock on the Trading Date
immediately preceding the date of the Conversion Notice and the number of shares
of Common Stock into which such shares of Series F Convertible Preferred Stock
could have been converted but for such limitation on the date of the Conversion
Notice, and the holders of the Series F Convertible Preferred Stock shall be
creditors of the Corporation with respect to that amount.



<PAGE>   35


                                                                               6



               (c)    NOTICE OF CONVERSION. The right of conversion shall be
exercised by the holder thereof by giving written notice (the "Conversion
Notice") to the Corporation, by facsimile or by registered mail or overnight
delivery service, with a copy by facsimile to the Corporation's then transfer
agent for its Common Stock, as designated by the Corporation from time to time,
that the holder elects to convert a specified number of shares of Series F
Convertible Preferred Stock representing a specified Stated Value thereof into
Common Stock and, if such conversion will result in the conversion of all of
such holder's shares of Series F Convertible Preferred Stock, by surrender of a
certificate or certificates for the shares so to be converted to the Corporation
at its principal office (or such other office or agency of the Corporation as
the Corporation may designate by notice in writing to the holders of the Series
F Convertible Preferred Stock) at any time during its usual business hours on
the date set forth in the Conversion Notice, together with a statement of the
name or names (with address) in which the certificate or certificates for shares
of Common Stock shall be issued. The Conversion Notice shall include therein the
Stated Value of shares of Series F Convertible Preferred Stock to be converted,
and a calculation (i) of the Market Price, (ii) the Conversion Price, and (iii)
the number of shares of Common Stock to be issued in connection with such
conversion.

               (d)    ISSUANCE OF CERTIFICATES; TIME CONVERSION EFFECTED. (i)
Promptly, but in no event more than three business days, after the receipt of
the Conversion Notice referred to in Subparagraph 5(c) (and surrender of the
certificate or certificates for the share or shares of Series F Convertible
Preferred Stock to be converted within three business days after the receipt of
the Conversion Notice, if requested), the Corporation shall issue and deliver,
or cause to be issued and delivered, to the holder, registered in such name or
names as such holder may direct, a certificate or certificates for the number of
whole shares of Common Stock into which such shares of Series F Convertible
Preferred Stock are converted. To the extent permitted by law, such conversion
shall be deemed to have been effected on the date on which such Conversion
Notice shall have been received by the Corporation and at the time specified
stated in such Conversion Notice, which must be during the calendar day of such
notice, and at such time the rights of the holder of such share or shares of
Series F Convertible Preferred Stock shall cease, and the person or persons in
whose name or names any certificate or certificates for shares of Common Stock
shall be issuable upon such conversion shall be deemed to have become the holder
or holders of record of the shares represented thereby. Issuance of shares of
Common Stock issuable upon conversion which are requested to be registered in a
name other than that of the registered holder shall be subject to compliance
with all applicable federal and state securities laws.

               (ii) The Corporation understands that a delay in the issuance
of the shares of Common Stock beyond three business days could result in
economic loss to the holder. As compensation to the holder for such loss, the
Corporation agrees to pay late payments to the holder for late issuance of
shares of Common Stock upon conversion in accordance with the following schedule
(where "No. Business Days Late" is defined as the number of business days beyond
three (3) business days from the date of receipt of the Conversion Notice):



<PAGE>   36


                                                                               7



<TABLE>
<CAPTION>
       No. Business Days Late                                 Late Payment For Each
                                                         $5,000 of Liquidation Preference
                                                              Amount Being Converted
- --------------------------------------       -----------------------------------------------------
<S>                                          <C>
                 1                                                     $100
                 2                                                     $200
                 3                                                     $300
                 4                                                     $400
                 5                                                     $500
                 6                                                     $600
                 7                                                     $700
                 8                                                     $800
                 9                                                     $900
                 10                                                   $1,000
                >10                                    $1,000 + $200 for each Business Day
                                                               Late beyond 10 days
</TABLE>


The Corporation shall pay any payments incurred under this Paragraph in
immediately available funds upon demand. Nothing herein shall limit holder's
right to pursue injunctive relief and/or actual damages for the Corporation's
failure to issue and deliver Common Stock to the holder. Furthermore, in
addition to any other remedies which may be available to the holder, in the
event that the Corporation fails for any reason to effect delivery of such
shares of Common Stock within five business days the date of receipt of the
Conversion Notice, the holder will be entitled to revoke the relevant Conversion
Notice by delivering a notice to such effect to the Corporation whereupon the
Corporation and the holder shall each be restored to their respective positions
immediately prior to delivery of such Conversion Notice.

                      (iii)   If, at any time (a) the Corporation challenges,
disputes or denies the right of the holder to effect the conversion of the
Series F Convertible Preferred Stock into Common Shares or otherwise dishonors
or rejects any Conversion Notice delivered in accordance with this Paragraph 5
or (b) any third party who is not and has never been an Affiliate of the holder
commences any lawsuit or proceeding or otherwise asserts any claim before any
court or public or governmental authority which seeks to challenge, deny,
enjoin, limit, modify, delay or dispute the right of the holder hereof to effect
the conversion of the Series F Convertible Preferred Stock into Common Stock,
then the holder shall have the right, by written notice to the Corporation, to
require the Corporation to promptly (but not later than the fifth Trading Day
after receipt of such notice) redeem the Series F Convertible Preferred Stock
for cash at a redemption price equal to one hundred thirty-five percent (135%)
of the Stated Value thereof (the "Mandatory Purchase Amount"). Under any of the
circumstances set forth above, the Corporation shall be responsible for the
payment of all costs and expenses of the holder, including reasonable legal fees
and expenses, as and when incurred in disputing any such action or pursuing its
rights hereunder (in addition to any other rights of the holder).




<PAGE>   37


                                                                               8


                      (iv)    The holder shall be entitled to exercise its
conversion privilege notwithstanding the commencement of any case under 11
U.S.C. Section 101 et seq. (the "Bankruptcy Code"). In the event the Corporation
is a debtor under the Bankruptcy Code, the Corporation hereby waives to the
fullest extent permitted any rights to relief it may have under 11 U.S.C.
Section 362 in respect of the holder's conversion privilege. The Corporation
hereby waives to the fullest extent permitted any rights to relief it may have
under 11 U.S.C. Section 362 in respect of the conversion of the Series F
Convertible Preferred Stock. The Corporation agrees, without cost or expense to
the holder, to take or consent to any and all action necessary to effectuate
relief under 11 U.S.C. Section 362.

               (e)    FRACTIONAL SHARES. No fractional shares shall be issued
upon conversion of Series F Convertible Preferred Stock into Common Stock. All
fractional shares shall be rounded up to the nearest whole share.

               (f)    REORGANIZATION OR RECLASSIFICATION. If any capital
reorganization or reclassification of the capital stock of the Corporation shall
be effected in such a way that holders of Common Stock shall be entitled to
receive stock, securities or assets with respect to or in exchange for Common
Stock, or, in the case of any consolidation, merger or mandatory share exchange
of the Corporation into any other company, then, as a condition of such
reorganization, reclassification or exchange, lawful and adequate provisions
shall be made whereby each holder of a share or shares of Series F Convertible
Preferred Stock shall thereupon have the right to receive, upon the basis and
upon the terms and conditions specified herein and in lieu of the shares of
Common Stock immediately theretofore receivable upon the conversion of such
share or shares of Series F Convertible Preferred Stock, such shares of stock,
securities or assets as may be issued or payable with respect to or in exchange
for a number of outstanding shares of such Common Stock equal to the number of
shares of such Common Stock immediately theretofore receivable upon such
conversion had such reorganization, reclassification or exchange not taken
place, and in any such case appropriate provisions shall be made with respect to
the rights and interests of such holder to the end that the provisions hereof
(including without limitation provisions for adjustments of the conversion
rights) shall thereafter be applicable, as nearly as may be, in relation to any
shares of stock, securities or assets thereafter deliverable upon the exercise
of such conversion rights.

               (g)    ADJUSTMENTS FOR SPLITS, COMBINATIONS, ETC. The Conversion
Price and the number of shares of Common Stock into which the Series F
Convertible Preferred Stock shall be convertible shall be adjusted for stock
splits, combinations, or other similar events. Additionally, an adjustment will
be made in the case of an exchange of Common Stock, consolidation or merger of
the Corporation with or into another corporation or sale of all or substantially
all of the assets of the Corporation in order to enable the holder of Series F
Convertible Preferred Stock to acquire the kind and the number of shares of
stock or other securities or property receivable in such event by a holder of
the number of shares of Common Stock that might otherwise have been issued upon
the conversion of the Series F Convertible Preferred Stock. No adjustment to the
Conversion Price will be made for dividends (other than stock dividends), if
any, paid on the Common Stock or for securities issued pursuant to exercise for
fair value of options, warrants, or restricted stock.

               (h)    ADJUSTMENTS TO CONVERSION RATIO. For so long as any shares
of Series F Convertible Preferred Stock are outstanding, but no later than one
year from the effective date of a registration statement registering for resale
by the holders the shares of Common Stock issuable


<PAGE>   38

                                                                               9


upon conversion of the Series F Convertible Preferred Stock, if the Corporation
(i) issues and sells pursuant to an exemption from registration under the
Securities Act (A) Common Stock at a purchase price on the date of issuance
thereof that is lower than the Conversion Price at such date (other than shares
of Common Stock issued upon conversion of the Corporation's convertible
preferred stock outstanding on the Original Issuance Date, or in connection with
the exercise of any warrants or options outstanding on the Original Issuance
Date or pursuant to the Corporation's 1998 Employee Stock Purchase Plan), (B)
warrants or options with an exercise price on the date of issuance of the
warrants or options that is lower than the Conversion Price on such date (other
than options and stock awards granted pursuant to the Corporation's 1995 and
1998 Stock Option Plans), or (C) convertible, exchangeable or exercisable
securities with a right to convert, exchange or exercise at a price or rate
lower than the Conversion Price on the date of issuance or conversion, as
applicable, of such convertible, exchangeable or exercisable securities (other
than the options and stock awards granted pursuant to the Corporation's 1995 and
1998 Stock Option Plans); and (ii) grants the right to the purchaser(s) thereof
to demand that the Corporation register under the Securities Act such Common
Stock issued or the Common Stock for which such warrants or options may be
exercised or such convertible, exchangeable or exercisable securities may be
converted, exercised or exchanged, then the Conversion Price shall be reduced to
a rate equal to the lowest of any lower rates since the most recently received
Conversion Notice, and such Adjusted Conversion Price shall apply to any future
Conversion Notices received by the Corporation, unless the unadjusted Conversion
Price would be lower than the Adjusted Conversion Price. The Adjusted Conversion
Price as it may exist from time to time shall not apply retroactively to any
shares of Series F Convertible Preferred Stock converted prior to the
implementation of such Adjusted Conversion Price. Notwithstanding the foregoing,
the Corporation may issue up to an aggregate total of Three Hundred Thousand
(300,000) shares of Common Stock (subject to adjustment only for stock splits,
stock dividends and reverse stock splits) at any price determined by the Board
of Directors, after the Original Issuance Date, without causing an Adjusted
Conversion Price.

         6.    MANDATORY CONVERSION.

               (a)    MANDATORY CONVERSION DATE. If on or after the third
anniversary of the Original Issuance Date (such date as selected by the
Corporation being the "Mandatory Conversion Date"), there remain issued and
outstanding any shares of Series F Convertible Preferred Stock, then the
Corporation shall be entitled to require all (but not less than all) holders of
shares of Series F Convertible Preferred Stock then outstanding to convert their
shares of Series F Convertible Preferred Stock into shares of Common Stock or,
at the option of the Corporation, to buy out all such holders in cash, at the
price set forth in Paragraph 5(a). The Corporation shall provide written notice
(the "Mandatory Conversion Notice") to the holders of shares of Series F
Convertible Preferred Stock of such mandatory conversion or such mandatory
buy-out. The Mandatory Conversion Notice shall include (i) the Stated Value of
the shares of Series F Convertible Preferred Stock to be converted or bought
out, (ii) the Conversion Price at the Mandatory Conversion Date, and (iii) the
number of shares of the Corporation's Common Stock to be issued (or the amount
of cash to be paid in the event of a buy-out) upon such mandatory conversion or
such mandatory buy-out at the then applicable Conversion Price. Notwithstanding
the foregoing, in no event shall the Corporation convert that portion of the
Series F Convertible Preferred Stock to the extent that the issuance of Common
Stock upon the conversion of such Series F Convertible Preferred Stock, when
combined with shares of Common Stock received upon other conversions of Series F
Convertible


<PAGE>   39
                                                                              10



Preferred Stock and exercise of the warrants issued in connection with the
purchase of Series F Convertible Preferred Stock by such holder and any other
holders of Series F Convertible Preferred Stock, would exceed 19.99% of the
number of shares of Common Stock outstanding on the Original Issuance Date, or
as to any individual holder, make such holder the beneficial owner of more than
5% of the Corporation's then outstanding Common Stock.

               (b)    SURRENDER OF CERTIFICATES. On or before the Mandatory
Conversion Date, each holder of shares of Series F Convertible Preferred Stock
shall surrender his or its certificate or certificates for all such shares to
the Corporation at the place designated in such Mandatory Conversion Notice (or
an affidavit of lost certificate in form and content reasonably satisfactory to
the Corporation), and shall thereafter receive certificates for the number of
shares of Common Stock to which such holder is entitled or, in the event of a
buy-out by the Corporation, the amount of cash to which such holder is entitled
within three business days. On the Mandatory Conversion Date, all rights with
respect to the Series F Convertible Preferred Stock so converted will terminate.
All certificates evidencing shares of Series F Convertible Preferred Stock that
are required to be surrendered for conversion in accordance with the provisions
hereof, from and after the Mandatory Conversion Date, shall be deemed to have
been retired and cancelled, notwithstanding the failure of the holder or holders
thereof to surrender such certificates on or prior to such date. The Corporation
may thereafter take such appropriate action as may be necessary to reduce the
authorized Series F Convertible Preferred Stock accordingly.

         7.    REDEMPTION OF SERIES F CONVERTIBLE PREFERRED  STOCK.

               (a)    RIGHT TO REDEEM SERIES F CONVERTIBLE PREFERRED STOCK. At
any time, and from time to time, on and after the expiration of the earlier of
(i) six months from the Original Issuance Date, or (ii) the closing of a
registered firm-commitment underwritten secondary offering of equity securities
by the Corporation for cash, the Corporation may, in its sole discretion, but
shall not be obligated to, redeem, in whole or in part, the then issued and
outstanding shares of Series F Convertible Preferred Stock, at a price (the
"Redemption Price") equal to the greater of (x) $1,500 per share of such Series
F Convertible Preferred Stock and (y) an amount equal to the product of the
closing sale price of a share of Common Stock on the Principal Market on the
Trading Day prior to the date of the Redemption Notice (as hereinafter defined)
and the number of shares of Common Stock into which such shares of Series F
Convertible Preferred Stock could be converted on the date of the Redemption
Notice.

               (b)    NOTICE OF REDEMPTION. The Corporation shall provide each
holder of record of the Series F Convertible Preferred Stock being redeemed with
written notice of redemption (the "Redemption Notice") not less than 30 days
prior to any date stipulated by the Corporation for the redemption of the Series
F Convertible Preferred Stock (the "Redemption Date"). The Redemption Notice
shall contain (i) the Redemption Date, (ii) the number of shares of Series F
Convertible Preferred Stock to be redeemed from the holder to whom the
Redemption Notice is delivered, (iii) instructions for surrender to the
Corporation of the certificate or certificates representing the shares of Series
F Convertible Preferred Stock to be redeemed, and (iv) a procedure for the
holder to specify the number of shares of Series F Convertible Preferred Stock
to be converted into Common Stock pursuant to Paragraph 5.


<PAGE>   40
                                                                              11


               (c)    RIGHT TO CONVERT SERIES F CONVERTIBLE PREFERRED STOCK UPON
RECEIPT OF REDEMPTION NOTICE. Upon receipt of the Redemption Notice, the
recipient thereof shall have the option, at its sole election, to specify what
portion of the Series F Convertible Preferred Stock called for redemption in the
Redemption Notice shall be redeemed as provided in this Paragraph 7 or converted
into Common Stock in the manner provided in Paragraph 5. If the holder of the
Series F Convertible Preferred Stock called for redemption elects to convert any
of such shares, then such conversion shall take place on the Conversion Date
specified by the holder, but in no event after the Redemption Date, in
accordance with the terms of Paragraph 5.

               (d)    SURRENDER OF CERTIFICATES; PAYMENT OF REDEMPTION PRICE. On
or before the Redemption Date, each holder of the shares of Series F Convertible
Preferred Stock to be redeemed shall surrender the required certificate or
certificates representing such shares to the Corporation, in the manner and at
the place designated in the Redemption Notice, and upon payment to the holder of
the Redemption Price, each such surrendered certificate shall be cancelled and
retired. If payment of such redemption price is not made in full by the
Redemption Date, the holder shall again have the right to convert the Series F
Convertible Preferred Stock as provided in Paragraph 5 hereof and the
Corporation's right of redemption under this Paragraph 7 shall cease to exist
from and after the Redemption Date. If a certificate is surrendered and all the
shares evidenced thereby are not being redeemed, the Corporation shall issue new
certificates to be registered in the names of the person(s) whose name(s)
appear(s) as the owners on the respective surrendered certificates and deliver
such certificate to such person(s).

         8.    NOTICES. In case at any time:

               (a)    the Corporation shall declare any dividend upon its Common
Stock payable in cash or stock or make any other pro rata distribution to the
holders of its Common Stock; or

               (b)    the Corporation shall offer for subscription pro rata to
the holders of its Common Stock any additional shares of stock of any class or
other rights; or

               (c)    there shall be any capital reorganization or
reclassification of the capital stock of the Corporation, or a consolidation or
merger of the Corporation with or into, or a sale of all or substantially all
its assets to, another entity or entities; or

               (d)    there shall be a voluntary or involuntary dissolution,
liquidation or winding up of the Corporation;

               then, in any one or more of said cases, the Corporation shall
give, by first class mail, postage prepaid, or by telex or facsimile or by
recognized overnight delivery service to non-U.S. residents, addressed to each
holder of any shares of Series F Convertible Preferred Stock at the address of
such holder as shown on the books of the Corporation, (i) at least 10 days'
prior written notice of the date on which the books of the Corporation shall
close or a record shall be taken for such dividend, distribution or subscription
rights or for determining rights to vote in respect of any such reorganization,
reclassification, consolidation, merger, sale, dissolution, liquidation or
winding


<PAGE>   41
                                                                              12


up and (ii) in the case of any such reorganization, reclassification,
consolidation, merger, sale, dissolution, liquidation or winding up, at least 10
days' prior written notice of the date when the same shall take place. Such
notice in accordance with the foregoing clause (i) shall also specify, in the
case of any such dividend, distribution or subscription rights, the date on
which the holders of Common Stock shall be entitled thereto and (ii) shall also
specify the date on which the holders of Common Stock shall be entitled to
exchange their Common Stock for securities or other property deliverable upon
such reorganization, reclassification, consolidation, merger, sale, dissolution,
liquidation or winding up, as the case may be.

         9.    STOCK TO BE RESERVED. The Corporation, upon the effective date of
this Certificate of Designations, has a sufficient number of shares of Common
Stock available to reserve for issuance upon the conversion of all outstanding
shares of Series F Convertible Preferred Stock. The Corporation will at all
times reserve and keep available out of its authorized Common Stock, solely for
the purpose of issuance upon the conversion of Series F Convertible Preferred
Stock as herein provided, such number of shares of Common Stock as shall then be
issuable upon the conversion of all outstanding shares of Series F Convertible
Preferred . The Corporation covenants that all shares of Common Stock which
shall be so issued shall be duly and validly issued, fully paid and
non-assessable. The Corporation will take all such action as may be so taken
without violation of any applicable law or regulation, or of any requirement of
any national securities exchange upon which the Common Stock may be listed to
have a sufficient number of authorized but unissued shares of Common Stock to
issue upon conversion of the Series F Convertible Preferred Stock. The
Corporation will not take any action which results in any adjustment of the
conversion rights if the total number of shares of Common Stock issued and
issuable after such action upon conversion of the Series F Convertible Preferred
Stock would exceed the total number of shares of Common Stock then authorized by
the Corporation's Restated Certificate of Incorporation, as amended.

         10.   NO REISSUANCE OF SERIES F CONVERTIBLE PREFERRED STOCK. Shares of
Series F Convertible Preferred Stock which are converted into shares of Common
Stock as provided herein shall not be reissued.

         11.   ISSUE TAX. The issuance of certificates for shares of Common
Stock upon conversion of Series F Convertible Preferred Stock shall be made
without charge to the holder for any United States issuance tax in respect
thereof, provided that the Corporation shall not be required to pay any tax
which may be payable in respect of any transfer involved in the issuance and
delivery of any certificate in a name other than that of the holder of the
Series F Convertible Preferred Stock which is being converted.

         12.   CLOSING OF BOOKS. The Corporation will at no time close its
transfer books against the transfer of any Series F Convertible Preferred Stock
or of any shares of Common Stock issued or issuable upon the conversion of any
shares of Series F Convertible Preferred Stock in any


<PAGE>   42
                                                                              13


manner which interferes with the timely conversion of such Series F Convertible
Preferred Stock, except as may otherwise be required to comply with applicable
securities laws.

         13.   DEFINITIONS. As used in this Certificate of Designations, the
term "Common Stock" shall mean and include the Corporation's authorized Common
Stock, $0.01 par value, as constituted on the date of filing of this Certificate
of Designations authorizing the issuance of the Series F Convertible Preferred
Stock, and shall also include any capital stock of any class of the Corporation
thereafter authorized which shall neither be limited to a fixed sum or
percentage of par value in respect of the rights of the holders thereof to
participate in dividends nor entitled to a preference in the distribution of
assets upon the voluntary or involuntary liquidation, dissolution or winding up
of the Corporation; provided that the shares of Common Stock receivable upon
conversion of shares of Series F Convertible Preferred Stock shall include only
shares designated as Common Stock of the Corporation on the date of filing of
this instrument, or in case of any reorganization, reclassification, or stock
split of the outstanding shares thereof, the stock, securities or assets
provided for in Subparagraph 5(f) and (g). Any capitalized terms used in this
Certificate of Designations but not defined herein shall have the meanings set
forth in that certain Preferred Stock Purchase Agreement among the Corporation
and the other persons signatory thereto relating to the issuance and sale of the
Series F Convertible Preferred Stock to the holders of the Series F Convertible
Preferred Stock on the Original Issuance Date, a copy of which will be provided
to any stockholder of the Corporation upon request to the Secretary of the
Corporation, without charge.

         14.   LOSS, THEFT, DESTRUCTION OF PREFERRED STOCK. Upon receipt of
evidence satisfactory to the Corporation of the loss, theft, destruction or
mutilation of certificates representing shares of Series F Convertible Preferred
Stock and, in the case of any such loss, theft or destruction, upon receipt of
indemnity reasonably satisfactory to the Corporation (which shall not include
the posting of any bond), or, in the case of any such mutilation, upon surrender
and cancellation of the Series F Convertible Preferred Stock certificate, the
Corporation shall make, issue and deliver, in lieu of such lost, stolen,
destroyed or mutilated certificates for Series F Convertible Preferred Stock,
new certificates for Series F Convertible Preferred Stock of like tenor.

         15.   WHO DEEMED ABSOLUTE OWNER. The Corporation may deem the person in
whose name the Series F Convertible Preferred Stock shall be registered upon the
registry books of the Corporation to be, and may treat it as, the absolute owner
of the Series F Convertible Preferred Stock for the purpose of conversion of the
Series F Convertible Preferred Stock and for all other purposes, and the
Corporation shall not be affected by any notice to the contrary. All such
payments and such conversion shall be valid and effectual to satisfy and
discharge the liability upon the Series F Convertible Preferred Stock to the
extent of the sum or sums so paid or the conversion so made.

         16.   REGISTER. The Corporation shall keep at its principal office a
register in which the Corporation shall provide for the registration of the
Series F Convertible Preferred Stock. Upon any transfer of the Series F
Convertible Preferred Stock in accordance with the provisions hereof, the
Corporation shall register such transfer on the Series F Convertible Preferred
Stock register.


<PAGE>   43
                                                                              14


         17.   WITHHOLDING. To the extent required by applicable law, the
Corporation may withhold amounts for or on account of any taxes imposed or
levied by or on behalf of any taxing authority in the United States having
jurisdiction over the Corporation from any payments made pursuant to the Series
F Convertible Preferred Stock.

         18.   HEADINGS. The headings of the Sections of this Certificate of
Designations are inserted for convenience only and do not constitute a part of
this Certificate of Designations.

     IN WITNESS WHEREOF, Ramesh C. Trivedi, Chief Executive Officer and
President of the Corporation, under penalties of perjury, does hereby declare
and certify that this is the act and deed of the Corporation and the facts
stated herein are true and accordingly has signed this Certificate of
Designations as of this 31st day of January, 2000.




                              INTEGRATED SURGICAL SYSTEMS, INC.




                              By: /s/ Ramesh C. Trivedi
                                  --------------------------------
                                       Ramesh C. Trivedi
                                       Chief Executive Officer and President

<PAGE>   44


                                                                       EXHIBIT B



NEITHER THIS WARRANT NOR THE SHARES ISSUABLE UPON EXERCISE HEREOF HAVE BEEN
REGISTERED WITH THE UNITED STATES SECURITIES AND EXCHANGE COMMISSION (THE
"COMMISSION") OR THE SECURITIES COMMISSION OF ANY STATE PURSUANT TO AN EXEMPTION
FROM REGISTRATION UNDER REGULATION D PROMULGATED UNDER THE SECURITIES ACT OF
1933, AS AMENDED (THE "SECURITIES ACT"). THIS WARRANT SHALL NOT CONSTITUTE AN
OFFER TO SELL NOR A SOLICITATION OF AN OFFER TO BUY THE WARRANT OR THE SHARES
ISSUABLE UPON EXERCISE HEREOF IN ANY JURISDICTION IN WHICH SUCH OFFER OR
SOLICITATION WOULD BE UNLAWFUL.

NEITHER THIS WARRANT NOR THE SHARES ISSUABLE UPON EXERCISE HEREOF MAY BE SOLD,
PLEDGED, TRANSFERRED OR ASSIGNED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION
STATEMENT UNDER THE SECURITIES ACT AND UNDER APPLICABLE STATE SECURITIES LAWS,
OR IN A TRANSACTION WHICH IS EXEMPT FROM REGISTRATION UNDER THE PROVISIONS OF
THE SECURITIES ACT AND UNDER PROVISIONS OF APPLICABLE STATE SECURITIES LAWS; AND
IN THE CASE OF AN EXEMPTION, ONLY IF THE COMPANY HAS RECEIVED AN OPINION OF
COUNSEL THAT SUCH TRANSACTION DOES NOT REQUIRE REGISTRATION OF THE WARRANT OR
SUCH SHARES, WHICH OPINION AND WHICH COUNSEL SHALL BE SATISFACTORY TO THE
COMPANY IN ITS SOLE DISCRETION.

                             STOCK PURCHASE WARRANT

                To Purchase ___________ Shares of Common Stock of

                        INTEGRATED SURGICAL SYSTEMS, INC.

THIS CERTIFIES that, for value received, _________________________ (the
"Holder"), is entitled, upon the terms and subject to the conditions hereinafter
set forth, at any time on or after August __, 2000 and on or prior to February
__, 2005 (the "Termination Date") but not thereafter, to subscribe for and
purchase from INTEGRATED SURGICAL SYSTEMS, INC., a corporation incorporated in
Delaware (the "Company"), _____________________ (____________) shares (the
"Warrant Shares") of Common Stock, par value US $0.01 per share of the Company
(the "Common Stock"). The purchase price of one share of Common Stock (the
"Exercise Price") under this Warrant shall be $____ per share [the closing
market price of a share of Common Stock on the Nasdaq SmallCap Market on the
Closing Date]. The Exercise Price and the number of shares for which the Warrant
is exercisable shall be subject to adjustment as provided herein. This Warrant
is being issued in connection with the Agreement and is subject to its terms and
conditions. In the event of any conflict between the terms of this Warrant and
the Agreement, the Agreement shall control.


                                       1
<PAGE>   45


         1.    Title of Warrant. Prior to the expiration hereof and subject to
compliance with applicable laws, this Warrant and all rights hereunder are
transferable, in whole or in part, at the office or agency of the Company by the
holder hereof in person or by duly authorized attorney, upon surrender of this
Warrant together with the Assignment Form annexed hereto properly endorsed.

         2.    Authorization of Shares. The Company covenants that all shares of
Common Stock which may be issued upon the exercise of rights represented by this
Warrant will, upon exercise of the rights represented by this Warrant, be duly
authorized, validly issued, fully paid and nonassessable and free from all
taxes, liens and charges in respect of the issue thereof (other than taxes in
respect of any transfer occurring contemporaneously with such issue).

         3.    Exercise of Warrant. (a) Except as provided in Section 4 herein,
exercise of the purchase rights represented by this Warrant may be made at any
time or times, before the close of business on the Termination Date, or such
earlier date on which this Warrant may terminate as provided in this Warrant, by
the surrender of this Warrant and the Notice of Exercise Form annexed hereto
duly executed, at the office of the Company (or such other office or agency of
the Company as it may designate by notice in writing to the registered holder
hereof at the address of such holder appearing on the books of the Company) and
upon payment of the Exercise Price of the shares thereby purchased by cash,
check or bank draft payable to the Company or by wire transfer or cashier's
check drawn on a United States bank; whereupon the holder of this Warrant shall
be entitled to receive a certificate for the number of shares of Common Stock so
purchased. Certificates for shares purchased hereunder shall be delivered to the
holder hereof within three (3) business days after the date on which this
Warrant shall have been exercised as aforesaid. Payment of the Exercise Price of
the shares may be by certified check or cashier's check or by wire transfer to
an account designated by the Company in an amount equal to the Exercise Price
multiplied by the number of Warrant Shares. This Warrant shall be deemed to have
been exercised and such certificate or certificates shall be deemed to have been
issued, and Holder or any other person so designated to be named therein shall
be deemed to have become a holder of record of such shares for all purposes, as
of the date the Warrant has been exercised by payment to the Company of the
Warrant purchase price and all taxes required to be paid by Holder, if any,
pursuant to Section 5 prior to the issuance of such shares have been paid. If
this Warrant shall have been exercised in part, the Company shall, at the time
of delivery of the certificate or certificates representing Warrant Shares,
deliver to Holder a new Warrant evidencing the rights of Holder to purchase the
unpurchased shares of Common Stock called for by this Warrant, which new Warrant
shall in all other respects be identical with this Warrant.

               (b)    Notwithstanding anything to the contrary contained herein,
if the issuance of the number of shares of Common Stock upon the exercise of
this Warrant, when added to the number of shares of Common Stock previously
issued by the Company upon conversion of shares of the Company's Series F
Convertible Preferred Stock and upon exercise of this Warrant and the other
warrants issued in connection with the sale of shares of Series F Convertible
Preferred Stock, would result in the issuance of more than 19.9% of the number
of shares of Common Stock which were issued and outstanding on the date upon
which the Series F Convertible Preferred Stock was



                                       2
<PAGE>   46


originally issued (the "Nasdaq Limit"), then the Holder may exercise this
Warrant only as to a number of shares of Common Stock that is not in excess of
the Nasdaq Limit, unless prior to such exercise, the Company shall have obtained
the approval of its voting stockholders to such issuance, if required in
accordance with the rules of the Nasdaq Stock Market, Inc. or any securities
exchange upon which the Common Stock is listed. To the extent the number of
shares of Common Stock issuable upon exercise of this Warrant would but for the
limitation set forth in this paragraph exceed the Nasdaq Limit, the Company
shall pay the Holder an amount in cash equal to the product of the closing sale
price of a share of Common Stock on the Trading Date immediately preceding of
the date of the Notice of Exercise and the number of shares of Common Stock in
excess of the Nasdaq Limit set forth in the Notice of Exercise that would have
been issued to the Holder upon such exercise but for such limitation.

               (c)    The Holder shall be entitled to exercise the Warrant
notwithstanding the commencement of any case under 11 U.S.C. Section 101 et seq.
(the "Bankruptcy Code"). In the event the Company is a debtor under the
Bankruptcy Code, the Company hereby waives to the fullest extent permitted any
rights to relief it may have under 11 U.S.C. Section 362 in respect of the
Holder's exercise right. The Company hereby waives to the fullest extent
permitted any rights to relief it may have under 11 U.S.C. Section 362 in
respect of the exercise of the Warrant. The Company agrees, without cost or
expense to the Holder, to take or consent to any and all action necessary to
effectuate relief under 11 U.S.C. Section 362.

               (d)    If a registration statement for the resale of the Warrant
Shares that may be acquired upon exercise of this Warrant is not in effect at
any time from and after one year from the issuance date of this Warrant, then
the Holder shall have the right to a "cashless exercise" in which the Holder4
shall be entitled to receive a certificate for the number of shares equal to the
quotient obtained by dividing [(A-B) (X)] by (A), where:

         (A) = the closing bid price per share of Common Stock on the Trading
Day preceding the date of such election;

         (B) = the Exercise Price of this Warrant; and

         (X) = the number of shares that may be acquired upon exercise of this
Warrant in accordance with the terms of this Warrant.

         4.    No Fractional Shares or Scrip. No fractional shares or scrip
representing fractional shares shall be issued upon the exercise of this
Warrant. As to any fraction of a share which Holder would otherwise be entitled
to purchase upon such exercise, the Company shall pay a cash adjustment in
respect of such final fraction in an amount equal to the same fraction of the
Market Price per share of Common Stock as of the Closing Date.

         5.    Charges, Taxes and Expenses. Issuance of certificates for shares
of Common Stock upon the exercise of this Warrant shall be made without charge
to the holder hereof for any issue or



                                       3
<PAGE>   47


transfer tax or other incidental expense in respect of the issuance of such
certificate, all of which taxes and expenses shall be paid by the Company, and
such certificates shall be issued in the name of the holder of this Warrant or
in such name or names as may be directed by the holder of this Warrant;
provided, however, that in the event certificates for shares of Common Stock are
to be issued in a name other than the name of the holder of this Warrant, this
Warrant when surrendered for exercise shall be accompanied by the Assignment
Form attached hereto duly executed by the holder hereof; and provided further,
that upon any transfer involved in the issuance or delivery of any certificates
for shares of Common Stock, the Company may require, as a condition thereto, the
payment of a sum sufficient to reimburse it for any transfer tax incidental
thereto.

         6.    Closing of Books. The Company will not close its shareholder
books or records in any manner which prevents the timely exercise of this
Warrant.

         7.    Transfer, Division and Combination. (a) Subject to compliance
with any applicable securities laws, transfer of this Warrant and all rights
hereunder, in whole or in part, shall be registered on the books of the Company
to be maintained for such purpose, upon surrender of this Warrant at the
principal office of the Company, together with a written assignment of this
Warrant substantially in the form attached hereto duly executed by Holder or its
agent or attorney and funds sufficient to pay any transfer taxes payable upon
the making of such transfer. Upon such surrender and, if required, such payment,
the Company shall execute and deliver a new Warrant or Warrants in the name of
the assignee or assignees and in the denomination specified in such instrument
of assignment, and shall issue to the assignor a new Warrant evidencing the
portion of this Warrant not so assigned, and this Warrant shall promptly be
cancelled. A Warrant, if properly assigned, may be exercised by a new Holder for
the purchase of shares of Common Stock without having a new Warrant issued.

               (b)    This Warrant may be divided or combined with other
Warrants upon presentation hereof at the aforesaid office of the Company,
together with a written notice specifying the names and denominations in which
new Warrants are to be issued, signed by Holder or its agent or attorney.
Subject to compliance with Section 7(a), as to any transfer which may be
involved in such division or combination, the Company shall execute and deliver
a new Warrant or Warrants in exchange for the Warrant or Warrants to be divided
or combined in accordance with such notice.

               (c)    The Company shall prepare, issue and deliver at its own
expense (other than transfer taxes) the new Warrant or Warrants under this
Section 7.

               (d)    The Company agrees to maintain, at its aforesaid office,
books for the registration and the registration of transfer of the Warrants.

         8.    No Rights as Shareholder until Exercise. This Warrant does not
entitle the holder hereof to any voting rights or other rights as a shareholder
of the Company prior to the exercise thereof. Upon the surrender of this Warrant
and the payment of the aggregate Exercise Price, the



                                       4
<PAGE>   48


Warrant Shares so purchased shall be and be deemed to be issued to such holder
as the record owner of such shares as of the close of business on the later of
the date of such surrender or payment.

         9.    Loss, Theft, Destruction or Mutilation of Warrant. The Company
represents and warrants that upon receipt by the Company of evidence reasonably
satisfactory to it of the loss, theft, destruction or mutilation of this Warrant
certificate or any stock certificate relating to the Warrant Shares, and in case
of loss, theft or destruction, of indemnity or security reasonably satisfactory
to it, and upon surrender and cancellation of such Warrant or stock certificate,
if mutilated, the Company will make and deliver a new Warrant or stock
certificate of like tenor and dated as of such cancellation, in lieu of such
Warrant or stock certificate.

         10.   Saturdays, Sundays, Holidays, etc. If the last or appointed day
for the taking of any action or the expiration of any right required or granted
herein shall be a Saturday, Sunday or a legal holiday, then such action may be
taken or such right may be exercised on the next succeeding day not a Saturday,
Sunday or legal holiday.

         11.   (a)    Adjustments of Exercise Price and Number of Warrant
Shares. The number and kind of securities purchasable upon the exercise of this
Warrant and the Exercise Price shall be subject to adjustment from time to time
upon the happening of any of the following. In case the Company shall (i)
declare or pay a dividend in shares of Common Stock or make a distribution in
shares of Common Stock to holders of its outstanding Common Stock, (ii)
subdivide its outstanding shares of Common Stock, (iii) combine its outstanding
shares of Common Stock into a smaller number of shares of Common Stock or (iv)
issue any shares of its capital stock in a reclassification of the Common Stock,
then the number of Warrant Shares purchasable upon exercise of this Warrant
immediately prior thereto shall be adjusted so that the holder of this Warrant
shall be entitled to receive the kind and number of Warrant Shares or other
securities of the Company which he would have owned or have been entitled to
receive had such Warrant been exercised in advance thereof. Upon each such
adjustment of the kind and number of Warrant Shares or other securities of the
Company which are purchasable hereunder, the holder of this Warrant shall
thereafter be entitled to purchase the number of Warrant Shares or other
securities resulting from such adjustment at an Exercise Price per such Warrant
Share or other security obtained by multiplying the Exercise Price in effect
immediately prior to such adjustment by the number of Warrant Shares purchasable
pursuant hereto immediately prior to such adjustment and dividing by the number
of Warrant Shares or other securities of the Company resulting from such
adjustment. An adjustment made pursuant to this paragraph shall become effective
immediately after the effective date of such event retroactive to the record
date, if any, for such event.

               (b)    Reorganization, Reclassification, Merger, Consolidation or
Disposition of Assets. In case the Company shall reorganize its capital,
reclassify its capital stock, consolidate or merge with or into another
corporation (where the Company is not the surviving corporation or where there
is a change in or distribution with respect to the Common Stock of the Company),
or sell, transfer or otherwise dispose of all or substantially all its property,
assets or business to another corporation and, pursuant to the terms of such
reorganization, reclassification, merger, consolidation



                                       5
<PAGE>   49


or disposition of assets, shares of common stock of the successor or acquiring
corporation, or any cash, shares of stock or other securities or property of any
nature whatsoever (including warrants or other subscription or purchase rights)
in addition to or in lieu of common stock of the successor or acquiring
corporation ("Other Property"), are to be received by or distributed to the
holders of Common Stock of the Company, then Holder shall have the right
thereafter to receive, upon exercise of the Warrant, the number of shares of
common stock of the successor or acquiring corporation or of the Company, if it
is the surviving corporation, and Other Property receivable upon or as a result
of such reorganization, reclassification, merger, consolidation or disposition
of assets by a holder of the number of shares of Common Stock for which this
Warrant is exercisable immediately prior to such event. In case of any such
reorganization, reclassification, merger, consolidation or disposition of
assets, the successor or acquiring corporation (if other than the Company) shall
expressly assume the due and punctual observance and performance of each and
every covenant and condition of this Warrant to be performed and observed by the
Company and all the obligations and liabilities hereunder, subject to such
modifications as may be deemed appropriate (as determined by resolution of the
Board of Directors of the Company) in order to provide for adjustments of shares
of Common Stock for which this Warrant is exercisable which shall be as nearly
equivalent as practicable to the adjustments provided for in this Section 11.
For purposes of this Section 11, "common stock of the successor or acquiring
corporation" shall include stock of such corporation of any class which is not
preferred as to dividends or assets over any other class of stock of such
corporation and which is not subject to redemption and shall also include any
evidences of indebtedness, shares of stock or other securities which are
convertible into or exchangeable for any such stock, either immediately or upon
the arrival of a specified date or the happening of a specified event and any
warrants or other rights to subscribe for or purchase any such stock. The
foregoing provisions of this Section 11 shall similarly apply to successive
reorganizations, reclassifications, mergers, consolidations or disposition of
assets.

               (c)    Certain Limitations. Notwithstanding anything herein to
the contrary, the Company agrees not to enter into any transaction which, by
reason of any adjustment hereunder, would cause the Exercise Price to be less
than the par value per share of Common Stock.

         12.   Voluntary Adjustment by the Company. The Company may at any time
during the term of this Warrant, reduce the then current Exercise Price to any
amount and for any period of time deemed appropriate by the Board of Directors
of the Company.

         13.   Notice of Adjustment. Whenever the number of Warrant Shares or
number or kind of securities or other property purchasable upon the exercise of
this Warrant or the Exercise Price is adjusted, as herein provided, the Company
shall promptly mail by registered or certified mail, return receipt requested,
to the holder of this Warrant notice of such adjustment or adjustments setting
forth the number of Warrant Shares (and other securities or property)
purchasable upon the exercise of this Warrant and the Exercise Price of such
Warrant Shares (and other securities or property) after such adjustment, setting
forth a brief statement of the facts requiring such adjustment and setting forth
the computation by which such adjustment was made. Such notice, in absence of
manifest error, shall be conclusive evidence of the correctness of such
adjustment.



                                       6

<PAGE>   50

         14.   Notice of Corporate Action.  If at any time

               (a)    the Company shall take a record of the holders of its
Common Stock for the purpose of entitling them to receive a dividend or other
distribution, or any right to subscribe for or purchase any evidences of its
indebtedness, any shares of stock of any class or any other securities or
property, or to receive any other right, or

               (b)    there shall be any capital reorganization of the Company,
any reclassification or recapitalization of the capital stock of the Company or
any consolidation or merger of the Company with, or any sale, transfer or other
disposition of all or substantially all the property, assets or business of the
Company to, another corporation or,

               (c)    there shall be a voluntary or involuntary dissolution,
liquidation or winding up of the Company;

then, in any one or more of such cases, the Company shall give to Holder (i) at
least 30 days' prior written notice of the date on which a record date shall be
selected for such dividend, distribution or right or for determining rights to
vote in respect of any such reorganization, reclassification, merger,
consolidation, sale, transfer, disposition, liquidation or winding up, and (ii)
in the case of any such reorganization, reclassification, merger, consolidation,
sale, transfer, disposition, dissolution, liquidation or winding up, at least 30
days' prior written notice of the date when the same shall take place. Such
notice in accordance with the foregoing clause also shall specify (i) the date
on which any such record is to be taken for the purpose of such dividend,
distribution or right, the date on which the holders of Common Stock shall be
entitled to any such dividend, distribution or right, and the amount and
character thereof, and (ii) the date on which any such reorganization,
reclassification, merger, consolidation, sale, transfer, disposition,
dissolution, liquidation or winding up is to take place and the time, if any
such time is to be fixed, as of which the holders of Common Stock shall be
entitled to exchange their shares of Common Stock for securities or other
property deliverable upon such disposition, dissolution, liquidation or winding
up. Each such written notice shall be sufficiently given if addressed to Holder
at the last address of Holder appearing on the books of the Company and
delivered in accordance with Section 17(d).

         15.   Authorized Shares. The Company covenants that during the period
the Warrant is outstanding, it will reserve from its authorized and unissued
Common Stock a sufficient number of shares to provide for the issuance of the
Warrant Shares upon the exercise of any purchase rights under this Warrant. The
Company further covenants that its issuance of this Warrant shall constitute
full authority to its officers who are charged with the duty of executing stock
certificates to execute and issue the necessary certificates for the Warrant
Shares upon the exercise of the purchase rights under this Warrant. The Company
will take all such reasonable action as may be necessary to assure that such
Warrant Shares may be issued as provided herein without violation of any
applicable law or regulation, or of any requirements of NASDAQ or any domestic
securities exchange upon which the Common Stock may be listed.



                                       7
<PAGE>   51


               The Company shall not by any action, including, without
limitation, amending its certificate of incorporation or through any
reorganization, transfer of assets, consolidation, merger, dissolution, issue or
sale of securities or any other voluntary action, avoid or seek to avoid the
observance or performance of any of the terms of this Warrant, but will at all
times in good faith assist in the carrying out of all such terms and in the
taking of all such actions as may be necessary or appropriate to protect the
rights of Holder against impairment. Without limiting the generality of the
foregoing, the Company will (a) not increase the par value of any shares of
Common Stock receivable upon the exercise of this Warrant above the amount
payable therefor upon such exercise immediately prior to such increase in par
value, (b) take all such action as may be necessary or appropriate in order that
the Company may validly and legally issue fully paid and nonassessable shares of
Common Stock upon the exercise of this Warrant, and (c) use its best efforts to
obtain all such authorizations, exemptions or consents from any public
regulatory body having jurisdiction thereof as may be necessary to enable the
Company to perform its obligations under this Warrant.

               Upon the request of Holder, the Company will at any time during
the period this Warrant is outstanding acknowledge in writing, in form
reasonably satisfactory to Holder, the continuing validity of this Warrant and
the obligations of the Company hereunder.

               Before taking any action which would cause an adjustment reducing
the current Exercise Price below the then par value, if any, of the shares of
Common Stock issuable upon exercise of the Warrants, the Company shall take any
corporate action which may be necessary in order that the Company may validly
and legally issue fully paid and non-assessable shares of such Common Stock at
such adjusted Exercise Price.

               Before taking any action which would result in an adjustment in
the number of shares of Common Stock for which this Warrant is exercisable or in
the Exercise Price, the Company shall obtain all such authorizations or
exemptions thereof, or consents thereto, as may be necessary from any public
regulatory body or bodies having jurisdiction thereof.

         16.   Required Registration. Pursuant to the terms and conditions set
forth in the Registration Rights Agreement entered into between the Company and
the Holders as of the date of issuance of this Warrant, the Company shall
prepare and file with the Commission not later than the 45th day after the
Closing Date, a Registration Statement relating to the offer and sale of the
Common Stock issuable upon exercise of the Warrants and shall use its best
efforts to cause the Commission to declare such Registration Statement effective
under the Securities Act as promptly as practicable but no later than 90 days
after the closing date.

         17.   Miscellaneous.

               (a)    Issue Date; Jurisdiction. The provisions of this Warrant
shall be construed and shall be given effect in all respects as if it had been
issued and delivered by the Company on the date hereof. This Warrant shall be
binding upon any successors or assigns of the Company. This



                                       8
<PAGE>   52


Warrant shall constitute a contract under the laws of New York without regard to
its conflict of law, principles or rules, and be subject to arbitration pursuant
to the terms set forth in the Agreement.

               (b)    Restrictions. The holder hereof acknowledges that the
Warrant Shares acquired upon the exercise of this Warrant, if not registered,
will have restrictions upon resale imposed by state and federal securities laws.

               (c)    Nonwaiver and Expenses. No course of dealing or any delay
or failure to exercise any right hereunder on the part of Holder shall operate
as a waiver of such right or otherwise prejudice Holder's rights, powers or
remedies, notwithstanding all rights hereunder terminate on the Termination
Date. If the Company fails to make, when due, any payments provided for
hereunder, or fails to comply with any other provision of this Warrant, the
Company shall pay to Holder such amounts as shall be sufficient to cover any
costs and expenses including, but not limited to, reasonable attorneys' fees,
including those of appellate proceedings, incurred by Holder in collecting any
amounts due pursuant hereto or in otherwise enforcing any of its rights, powers
or remedies hereunder.

               (d)    Notices. Any notice, request or other document required or
permitted to be given or delivered to the holder hereof by the Company shall be
delivered in accordance with the notice provisions of the Agreement.

               (e)    Limitation of Liability. No provision hereof, in the
absence of affirmative action by Holder to purchase shares of Common Stock, and
no enumeration herein of the rights or privileges of Holder hereof, shall give
rise to any liability of Holder for the purchase price of any Common Stock or as
a stockholder of the Company, whether such liability is asserted by the Company
or by creditors of the Company.

               (f)    Remedies. Holder, in addition to being entitled to
exercise all rights granted by law, including recovery of damages, will be
entitled to specific performance of its rights under this Warrant. The Company
agrees that monetary damages would not be adequate compensation for any loss
incurred by reason of a breach by it of the provisions of this Warrant and
hereby agrees to waive the defense in any action for specific performance that a
remedy at law would be adequate.

               (g)    Successors and Assigns. Subject to applicable securities
laws, this Warrant and the rights evidenced hereby shall inure to the benefit of
and be binding upon the successors of the Company and the successors and assigns
of Holder. The provisions of this Warrant are intended to be for the benefit of
all Holders from time to time of this Warrant and shall be enforceable by any
such Holder or holder of Warrant Stock.

               (h)    Cooperation. The Company shall cooperate with Holder in
supplying such information as may be reasonably necessary for Holder to complete
and file any information reporting forms presently or hereafter required by the
Commission as a condition to the availability of an exemption from the
Securities Act for the sale of any Warrant or Restricted Common Stock.



                                       9
<PAGE>   53


               (i)    Indemnification. The Company agrees to indemnify and hold
harmless Holder from and against any liabilities, obligations, losses, damages,
penalties, actions, judgments, suits, claims, costs, attorneys' fees, expenses
and disbursements of any kind which may be imposed upon, incurred by or asserted
against Holder in any manner relating to or arising out of any failure by the
Company to perform or observe in any material respect any of its covenants,
agreements, undertakings or obligations set forth in this Warrant; provided,
however, that the Company will not be liable hereunder to the extent that any
liabilities, obligations, losses, damages, penalties, actions, judgments, suits,
claims, costs, attorneys' fees, expenses or disbursements are found in a final
non-appealable judgment by a court to have resulted from Holder's negligence,
bad faith or willful misconduct in its capacity as a stockholder or
warrantholder of the Company.

               (j)    Amendment. This Warrant and all other Warrants may be
modified or amended or the provisions hereof waived with the written consent of
the Company and the Holder.

               (k)    Severability. Wherever possible, each provision of this
Warrant shall be interpreted in such manner as to be effective and valid under
applicable law, but if any provision of this Warrant shall be prohibited by or
invalid under applicable law, such provision shall be ineffective to the extent
of such prohibition or invalidity, without invalidating the remainder of such
provisions or the remaining provisions of this Warrant.

               (l)    Headings. The headings used in this Warrant are for the
convenience of reference only and shall not, for any purpose, be deemed a part
of this Warrant.

         IN WITNESS WHEREOF, the Company has caused this Warrant to be executed
by its officer thereunto duly authorized.


Dated: February ___, 2000



                              INTEGRATED SURGICAL SYSTEMS, INC.



                              By:
                                 ----------------------------------------------
                                       Ramesh C. Trivedi
                                       Chief Executive Officer and President




                                       10
<PAGE>   54



                               NOTICE OF EXERCISE


To:      INTEGRATED SURGICAL SYSTEMS, INC.

         (1)   The undersigned hereby elects to purchase ________ shares of
Common Stock, par value $0.01 per share (the "Common Stock"), of INTEGRATED
SURGICAL SYSTEMS, INC. pursuant to the terms of the attached Warrant, and
tenders herewith payment of the exercise price in full, together with all
applicable transfer taxes, if any.

         (2)   Please issue a certificate or certificates representing said
shares of Common Stock in the name of the undersigned or in such other name as
is specified below:


                           -------------------------------
                           (Name)



                           -------------------------------
                           (Address)

                           -------------------------------




Dated:

                                      ------------------------------
                                      Signature



                                       1
<PAGE>   55



                                 ASSIGNMENT FORM

                    (To assign the foregoing warrant, execute
                   this form and supply required information.
                 Do not use this form to exercise the warrant.)



         FOR VALUE RECEIVED, the foregoing Warrant and all rights evidenced
thereby are hereby assigned to


_______________________________________________ whose address is


- ---------------------------------------------------------------.




- ---------------------------------------------------------------


                      Dated:
                             ------------------------,



                      Holder's Signature:
                                           -----------------------------

                      Holder's Address:
                                           -----------------------------


                                           -----------------------------



Signature Guaranteed:
                     -------------------------------------------




NOTE: The signature to this Assignment Form must correspond with the name as it
appears on the face of the Warrant, without alteration or enlargement or any
change whatsoever, and must be guaranteed by a bank or trust company. Officers
of corporations and those acting in an fiduciary or other representative
capacity should file proper evidence of authority to assign the foregoing
Warrant.


                                       2
<PAGE>   56


                                                                       EXHIBIT C


                          REGISTRATION RIGHTS AGREEMENT


THIS REGISTRATION RIGHTS AGREEMENT, dated as of the 8th day of February, 2000,
between INTEGRATED SURGICAL SYSTEMS, INC., a corporation incorporated under the
laws of the State of Delaware, and having its principal place of business at
1850 Research Park Drive, Davis, California 95616-4884 (the "Company") and the
person signatory hereto (the "Holder").

         WHEREAS, simultaneously with the execution and delivery of this
Agreement, the Holder is purchasing from the Company, pursuant to a Preferred
Stock Purchase Agreement dated the date hereof (the "Purchase Agreement"),
__________ shares of Series F Convertible Preferred Stock, $0.01 par value and a
Warrant to purchase ___________ shares of the Company's Common Stock (terms not
defined herein shall have the meanings ascribed to them in the Purchase
Agreement); and

         WHEREAS, the Company desires to grant to the Holder the registration
rights set forth herein with respect to the shares of Common Stock issuable upon
conversion of the Series E Convertible Preferred Stock and shares of Common
Stock underlying the Warrant (hereinafter referred to as the "Stock" or
"Securities" of the Company).

         NOW, THEREFORE, the parties hereto mutually agree as follows:

         Section 1. Registrable Securities. As used herein the term "Registrable
Security" means the Securities; provided, however, that with respect to any
particular Registrable Security, such security shall cease to be a Registrable
Security when, as of the date of determination, (i) it has been effectively
registered under the Securities Act of 1933, as amended (the "1933 Act") and
disposed of pursuant thereto, (ii) registration under the 1933 Act is no longer
required for the immediate public distribution of such security without
limitation as to volume as a result of the provisions of Rule 144 promulgated
under the 1933 Act, or (iii) it has ceased to be outstanding. The term
"Registrable Securities" means any and/or all of the securities falling within
the foregoing definition of a "Registrable Security." In the event of any
merger, reorganization, consolidation, recapitalization or other change in
corporate structure affecting the Common Stock, such adjustment shall be deemed
to be made in the definition of "Registrable Security" as is appropriate in
order to prevent any dilution or enlargement of the rights granted pursuant to
this Agreement.

         Section 2. Restrictions on Transfer. The Holder acknowledges and
understands that prior to the registration of the Securities as provided herein,
the Securities are "restricted securities" as defined in Rule 144 promulgated
under the Act. The Holder understands that no disposition or transfer of the
Securities may be made by Holder in the absence of (i) an opinion of counsel to
the Holder that such transfer may be made without registration under the 1933
Act or (ii) such registration.



                                       1
<PAGE>   57


         With a view to making available to the Holder the benefits of Rule 144
under the Securities Act or any other similar rule or regulation of the
Commission that may at any time permit the Holder to sell securities of the
Company to the public without registration ("Rule 144"), the Company agrees to:

               (a)    comply with the provisions of paragraph (c)(1) of Rule
144; and

               (b)    file with the Commission in a timely manner all reports
and other documents required to be filed by the Company pursuant to Section 13
or 15(d) under the Exchange Act; and, if at any time it is not required to file
such reports but in the past had been required to or did file such reports, it
will, upon the request of any Holder, make available other information as
required by, and so long as necessary to permit sales of, its Registrable
Securities pursuant to Rule 144.

         Section 3. Registration Rights.

               (a)    The Company agrees that it will prepare and file with the
Securities and Exchange Commission ("Commission"), within 45 days after the date
hereof, a registration statement on Form S-3 (or other appropriate form of
registration statement) under the 1933 Act (the "Registration Statement"), at
the sole expense of the Company (except as provided in Section 3(c) hereof), in
respect of all holders of Registrable Securities, so as to permit a public
offering and resale of the Registrable Securities under the Act.

                      The Company shall use its best efforts to cause the
Registration Statement to become effective, not later than 90 days after the
date hereof, or if the Commission notifies the Company that it will not review
the Registration Statement, not later than ten business days thereafter. The
number of shares designated in the Registration Statement to be registered shall
include all the Warrant Shares and the number of shares of Common Stock which
would be issued assuming a Market Price of $1.00 per share of Common Stock, and
shall include appropriate language regarding reliance upon Rule 416 to the
extent permitted by the Commission. The Company will notify Holder of the
effectiveness of the Registration Statement within one business day of such
event. The number of Registrable Securities that the Holder may sell under the
Registration Statement may not exceed that number of shares of Common Stock
which the Selling Securityholder section of the Registration Statement states
are to be offered by the Holder.

               (b)    The Company will maintain the Registration Statement or
post-effective amendment filed under this Section 3 hereof current under the
1933 Act until the earlier of (i) the date that all of the Registrable
Securities have been sold pursuant to the Registration Statement, (ii) the date
the holders thereof receive an opinion of counsel to the Company, which counsel
shall be reasonably acceptable to the Holder, that all Registrable Securities
may be sold under the provisions of Rule 144 without limitation as to volume,
(iii) all Registrable Securities have been otherwise transferred to Holders who
may trade such shares without restriction under the Securities Act, and the
Company has delivered a new certificate or other evidence of ownership for such
securities not bearing a restrictive legend, or (iv) all Registrable Securities
may be sold without any time, volume or manner limitations pursuant to Rule
144(k) or any similar provision then in effect under the



                                       2
<PAGE>   58


Securities Act in the opinion of counsel to the Company, which counsel shall be
reasonably acceptable to the Holder.

               (c)    All fees, disbursements and out-of-pocket expenses and
costs incurred by the Company in connection with the preparation and filing of
the Registration Statement under subparagraph 3(a) and in complying with
applicable securities and Blue Sky laws (including, without limitation, all
attorneys' fees) shall be borne by the Company. The Holder shall bear the cost
of underwriting discounts and commissions, if any, applicable to the Registrable
Securities being registered and the fees and expenses of its counsel. The Holder
and its counsel shall have a reasonable period, not to exceed three (3) business
days, to review the proposed Registration Statement or any amendment thereto,
prior to filing with the Commission, and the Company shall provide each Holder
with copies of any comment letters received from the Commission with respect
thereto. The Company shall make reasonably available for inspection by Holder,
any underwriter participating in any disposition pursuant to the Registration
Statement, and any attorney, accountant or other agent retained by such Holder
or any such underwriter all relevant financial and other records, pertinent
corporate documents and properties of the Company and its subsidiaries, and
cause the Company's officers, directors and employees to supply all information
reasonably requested by such Holder or any such underwriter, attorney,
accountant or agent in connection with the Registration Statement, in each case,
as is customary for similar due diligence examinations; provided, however, that
all records, information and documents that are designated in writing by the
Company, in good faith, as confidential, proprietary or containing any material
non-public information shall be kept confidential by such Holder and any such
underwriter, attorney, accountant or agent (pursuant to an appropriate
confidentiality agreement in the case of any such Holder or agent), unless such
disclosure is made pursuant to judicial process in a court proceeding (after
first giving the Company an opportunity promptly to seek a protective order or
otherwise limit the scope of the information sought to be disclosed) or is
required by law, or such records, information or documents become available to
the public generally or through a third party not in violation of an
accompanying obligation of confidentiality; and provided further that, if the
foregoing inspection and information gathering would otherwise disrupt the
Company's conduct of its business, such inspection and information gathering
shall, to the maximum extent possible, be coordinated on behalf of the Holder
and the other parties entitled thereto by one firm of counsel designed by and on
behalf of the majority in interest of Holder and other parties. The Company
shall qualify any of the securities for sale in such states as such Holder
reasonably designates and shall furnish indemnification in the manner provided
in Section 6 hereof. However, the Company shall not be required to qualify in
any state which will require an escrow or other restriction relating to the
Company and/or the sellers. The Company at its expense will supply the Holder
with copies of the Registration Statement and the prospectus or offering
circular included therein and other related documents in such quantities as may
be reasonably requested by the Holder.

               (d)    The Company shall not be required by this Section 3 to
include a Holder's Registrable Securities in any Registration Statement which is
to be filed if, in the opinion of counsel for both the Holder and the Company
(or, should they not agree, in the opinion of another counsel experienced in
securities law matters acceptable to counsel for the Holder and the Company) the
proposed offering or other transfer as to which such registration is requested
is exempt from



                                       3
<PAGE>   59


applicable federal and state securities laws and would result in all purchasers
or transferees obtaining securities which are not "restricted securities", as
defined in Rule 144 under the 1933 Act.

               (e)    In the event that (i) the Registration Statement to be
filed by the Company pursuant to Section 3(a) above is not filed with the
Commission within 45 days after the date hereof, or the Registration Statement
is not declared effective by the Commission not later than 90 days after the
date hereof, or if the Commission notifies the Company that it will not review
the Registration Statement and the Registration Statement is not declared
effective not later than ten (10) business days thereafter, (ii) the
Registration Statement is not maintained as effective by the Company for the
period set forth in Section 3(b) above or (iii) an amendment to the Registration
Statement was not filed by the Company with the Commission and declared
effective by the Commission on a timely basis to include any additional number
of Registrable Securities as described in Section 3(i), if necessary, then the
Company will pay Holder (pro rated on a daily basis), as liquidated damages for
such failure and not as a penalty, two (2%) percent of the purchase price of the
then outstanding shares of Preferred Stock for the first thirty (30) days, and
in the event of late filing, three percent (3%) percent of the purchase price of
the outstanding shares of Preferred Stock for every thirty (30) day period
thereafter until the Registration Statement has been filed and in the event of
late effectiveness, one percent (1%) of the purchase price of the outstanding
shares of Preferred Stock for every thirty (30) day period thereafter until the
Registration Statement has been declared effective. Such payment of the
liquidated damages shall be made to the Holder in cash, immediately upon demand,
provided, however, that the payment of such liquidated damages shall not relieve
the Company from its obligations to register the Registrable Securities pursuant
to this Section.

                      Notwithstanding the above, if the Registration Statement
covering the Additional Registrable Securities (as defined in Section 3(i)
hereof) required to be filed by the Company pursuant to Section 3(i) hereof is
not filed with the Commission within 45 days after the Market Price declines to
$1.00 or less for five consecutive Trading Days, the Company shall be in default
of this Registration Rights Agreement and the liquidated damages provisions of
the foregoing paragraph shall apply.

                      If the Company does not remit the damages to the Holder as
set forth above, the Company will pay the Holder reasonable costs of collection,
including attorneys fees, in addition to the liquidated damages. The
registration of the Securities pursuant to this provision shall not affect or
limit Holder's other rights or remedies as set forth in this Agreement.

               (f)    No provision contained herein shall preclude the Company
from selling securities pursuant to any Registration Statement in which it is
required to include Registrable Securities pursuant to this Section 3.

               (g)    If at any time or from time to time after the effective
date of the Registration Statement, the Company notifies the Holder in writing
of the existence of a Potential Material Event (as defined in Section 3(h)
below), the Holder shall not offer or sell any Registrable Securities or engage
in any other transaction involving or relating to Registrable Securities, from
the time of the giving of notice with respect to a Potential Material Event
until such Holder receives written notice



                                       4
<PAGE>   60


from the Company that such Potential Material Event either has been disclosed to
the public or no longer constitutes a Potential Material Event; provided,
however, that the Company may not so suspend the right to such holders of
Securities for more than twenty (20) days in the aggregate during any twelve
month period, during the periods the Registration Statement is required to be in
effect. If a Potential Material Event shall occur prior to the date the
Registration Statement is filed, then the Company's obligation to file the
Registration Statement shall be delayed without penalty for not more than twenty
(20) days. The Company must give Holder notice in writing at least two (2)
business days prior to the first day of the blackout period.

               (h)    "Potential Material Event" means any of the following: (a)
the possession by the Company of material information not ripe for disclosure in
a registration statement, which shall be evidenced by determinations in good
faith by the Chief Executive Officer or the Board of Directors of the Company
that disclosure of such information in the Registration Statement would be
detrimental to the business and affairs of the Company; or (b) any material
engagement or activity by the Company which would, in the good faith
determination of the Chief Executive Officer or the Board of Directors of the
Company, be adversely affected by disclosure in a registration statement at such
time, which determination shall be accompanied by a good faith determination by
the Chief Executive Officer or the Board of Directors of the Company that the
Registration Statement would be materially misleading absent the inclusion of
such information.

               (i)    In the event the Market Price declines to $1.00 or less
for five consecutive Trading Days (the "Decline Date"), the Company shall, to
the extent required by the Securities Act (because the additional shares were
not covered by the Registration Statement filed pursuant to Section 3(a)), file
an additional Registration Statement with the Commission for such additional
number of Registrable Securities issuable upon conversion of the Preferred Stock
(the "Additional Registrable Securities"), in addition to those previously
registered, as would be necessary to satisfy conversions of the then outstanding
shares of Preferred Stock based upon the then prevailing market price of the
Common Stock. The Company shall prepare and file with the Commission not later
than the 30th day after the Decline Date, a registration statement relating to
the offer and sale of such Additional Registrable Securities (the "Additional
Registration Statement") and shall use its best efforts to cause the Commission
to declare such Additional Registration Statement effective under the Securities
Act as promptly as practicable but not later than 60 days thereafter. If the
Additional Registration Statement is not (i) filed with the Commission by the
30th day after the Decline Date or (ii) declared effective by the Commission
within 90 days after the Decline Date (either of which, without duplication, an
"Additional Registration Date"), then the Company shall make payments to the
Holder as set forth in Section 3(e) hereof, for late filing or effectiveness, as
the case may be, relating to the Additional Securities.

         Section 4. Cooperation with Company. Holder will cooperate with the
Company in all respects in connection with this Agreement, including timely
supplying all information reasonably requested by the Company and executing and
returning all documents reasonably requested in connection with the registration
and sale of the Registrable Securities and entering into and performing its
obligations under any underwriting agreement, if the offering is an underwritten



                                       5
<PAGE>   61


offering, in usual and customary form, with the managing underwriter or
underwriters of such underwritten offering.

         Section 5. Registration Procedures. If and whenever the Company is
required by any of the provisions of this Agreement to effect the registration
of any of the Registrable Securities under the Act, the Company shall (except as
otherwise provided in this Agreement), as expeditiously as possible:

               (a)(i) prepare and file with the Commission such amendments
and supplements to the Registration Statement and the prospectus used in
connection therewith as may be necessary to keep such registration statement
effective and to comply with the provisions of the Act with respect to the sale
or other disposition of all securities covered by such registration statement
whenever the Holder of such securities shall desire to sell or otherwise dispose
of the same (including prospectus supplements with respect to the sales of
securities from time to time in connection with a registration statement
pursuant to Rule 415 promulgated under the Act) and (ii) take all lawful action
such that each of (A) the Registration Statement and any amendment thereto does
not, when it becomes effective, contain an untrue statement of a material fact
or omit to state a material fact required to be stated therein or necessary to
make the statements therein, not misleading and (B) the Prospectus forming part
of the Registration Statement, and any amendment or supplement thereto, does not
at any time during the Registration Period include an untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading.

               (b)(i) prior to the filing with the Commission of any
Registration Statement (including any amendments thereto) and the distribution
or delivery of any prospectus (including any supplements thereto), provide draft
copies thereof to the Holders and reflect in such documents all such comments as
the Holders (and their counsel) reasonably may propose respecting the Selling
Shareholders and Plan of Distribution sections (or equivalents) and (ii) furnish
to each Holder such numbers of copies of a prospectus including a preliminary
prospectus or any amendment or supplement to any prospectus, in conformity with
the requirements of the Act, and such other documents, as such Holder may
reasonably request in order to facilitate the public sale or other disposition
of the securities owned by such Holder;

               (c)    register and qualify the securities covered by the
Registration Statement under such other securities or blue sky laws of such
jurisdictions as the Holder shall reasonably request (subject to the limitations
set forth in Section 3(d) above), and do any and all other acts and things which
may be necessary or advisable to enable each Holder to consummate the public
sale or other disposition in such jurisdiction of the securities owned by such
Holder, except that the Company shall not for any such purpose be required to
qualify to do business as a foreign corporation in any jurisdiction wherein it
is not so qualified or to file therein any general consent to service of
process;

               (d)    list such securities on The Nasdaq SmallCap Market or
other national securities exchange on which any securities of the Company are
then listed, if the listing of such securities is then permitted under the rules
of such exchange or Nasdaq;



                                       6
<PAGE>   62


               (e)    enter into and perform its obligations under an
underwriting agreement, if the offering is an underwritten offering, in usual
and customary form, with the managing underwriter or underwriters of such
underwritten offering, including, but not limited to, the following:

                      (i) making such representations and warranties to the
Holder participating in such underwritten offering and to the managers, in form,
substance and scope as are customarily made by the Company to underwriters in
secondary underwritten offerings;

                      (ii) obtaining opinions of counsel to the Company (which
counsel and opinions (in form, scope and substance) shall be reasonably
satisfactory to the managers) addressed to the underwriters, covering such
matters as are customarily covered in opinions requested in secondary
underwritten offerings (it being agreed that the matters to be covered by such
opinions shall include, without limitation, as of the date of the opinion and as
of the Effective Time of the Registration Statement or most recent
post-effective amendment thereto, as the case may be, the absence from the
Registration Statement and the Prospectus, including any documents incorporated
by reference therein, of an untrue statement of a material fact or the omission
of a material fact required to be stated therein or necessary to make the
statements therein (in the case of the Prospectus, in light of the circumstances
under which they were made) not misleading, subject to customary limitations);

                      (iii) obtaining "cold comfort" letters and updates thereof
from the independent public accountants of the Company (and, if necessary, from
the independent public accountants of any subsidiary of the Company or of any
business acquired by the Company, in each case for which financial statements
and financial data are, or are required to be, included in the Registration
Statement), addressed to each underwriter participating in such underwritten
offering (if such underwriter has provided such letter, representations or
documentation, if any, required for such cold comfort letter to be so
addressed), in customary form and covering matters of the type customarily
covered in "cold comfort" letters in connection with secondary underwritten
offerings; and

                      (iv) delivering such documents and certificates as may be
reasonably required by the managers, if any;

               (f)    notify each Holder of Registrable Securities covered by
the Registration Statement, at any time when a prospectus relating thereto
covered by the Registration Statement is required to be delivered under the Act,
of the happening of any event of which it has knowledge as a result of which the
prospectus included in the Registration Statement, as then in effect, includes
an untrue statement of a material fact or omits to state a material fact
required to be stated therein or necessary to make the statements therein not
misleading in the light of the circumstances then existing, and the Company
shall prepare and file a curative amendment under Section 5(a) as quickly as
commercially possible;

               (g)    as promptly as practicable after becoming aware of such
event, notify each Holder who holds Registrable Securities being sold (or, in
the event of an underwritten offering, the managing underwriters) of the
issuance by the Commission of any stop order or other suspension



                                       7
<PAGE>   63


of the effectiveness of the Registration Statement at the earliest possible time
and take all lawful action to effect the withdrawal, recession or removal of
such stop order or other suspension;

               (h)    cooperate with the Holders who hold Registrable Securities
being offered to facilitate the timely preparation and delivery of certificates
for the Registrable Securities to be offered pursuant to the Registration
Statement and enable such certificates for the Registrable Securities to be in
such denominations or amounts, as the case may be, as the Holders reasonably may
request and registered in such names as the Holder may request; and, within
three business days after a Registration Statement which includes Registrable
Securities is declared effective by the Commission, deliver and cause legal
counsel selected by the Company to deliver to the transfer agent for the
Registrable Securities (with copies to the Holders whose Registrable Securities
are included in such Registration Statement) an appropriate instruction and, to
the extent necessary, an opinion of such counsel;

               (i)    take all such other lawful actions reasonably necessary to
expedite and facilitate the disposition by the Holders of their Registrable
Securities in accordance with the intended methods therefor provided in the
prospectus which are customary under the circumstances;

               (j)    make generally available to its security holders as soon
as practicable, but in any event not later than 18 months after (i) the
effective date (as defined in Rule 158(c) under the Securities Act) of the
Registration Statement, and (ii) the effective date of each post-effective
amendment to the Registration Statement, as the case may be, an earnings
statement of the Company and its subsidiaries complying with Section 11(a) of
the Securities Act and the rules and regulations of the commission thereunder
(including, at the option of the Company, Rule 158);

               (k)    in the event of an underwritten offering, promptly include
or incorporate in a Prospectus supplement or post-effective amendment to the
Registration Statement such information as the managers reasonably agree should
be included therein and to which the Company does not reasonably object and make
all required filings of such Prospectus supplement or post-effective amendment
as soon as practicable after it is notified of the matters to be included or
incorporated in such Prospectus supplement or post-effective amendment; and

               (l)    maintain a transfer agent and registrar for its Common
Stock.

         Section 6.  Indemnification.

               (a)    The Company agrees to indemnify and hold harmless the
Holder and each person, if any, who controls the Holder within the meaning of
the 1933 Act ("Distributing Holder") against any losses, claims, damages or
liabilities, joint or several (which shall, for all purposes of this Agreement,
include, but not be limited to, all reasonable costs of defense and
investigation and all reasonable attorneys' fees), to which the Distributing
Holder may become subject, under the 1933 Act or otherwise, insofar as such
losses, claims, damages or liabilities (or actions in respect thereof) arise out
of or are based upon any untrue statement or alleged untrue statement of any
material fact contained in the Registration Statement, or any related
preliminary prospectus, final prospectus,




                                       8
<PAGE>   64


offering circular, notification or amendment or supplement thereto, or arise out
of or are based upon the omission or alleged omission to state therein a
material fact required to be stated therein or necessary to make the statements
therein not misleading; provided, however, that the Company will not be liable
in any such case to the extent that any such loss, claim, damage or liability
arises out of or is based upon an untrue statement or alleged untrue statement
or omission or alleged omission made in the Registration Statement, preliminary
prospectus, final prospectus, offering circular, notification or amendment or
supplement thereto in reliance upon, and in conformity with, written information
furnished to the Company by the Distributing Holder, specifically for use in the
preparation thereof. This Section 6(a) shall not inure to the benefit of any
Distributing Holder with respect to any person asserting such loss, claim,
damage or liability who purchased the Registrable Securities which are the
subject thereof if the Distributing Holder failed to send or give (in violation
of the 1933 Act or the rules and regulations promulgated thereunder) a copy of
the prospectus contained in such Registration Statement to such person at or
prior to the written confirmation to such person of the sale of such Registrable
Securities, where the Distributing Holder was obligated to do so under the 1933
Act or the rules and regulations promulgated thereunder.

               (b)    Each Distributing Holder agrees that it will indemnify and
hold harmless the Company, and each officer, director of the Company or person,
if any, who controls the Company within the meaning of the 1933 Act, against any
losses, claims, damages or liabilities (which shall, for all purposes of this
Agreement, include, but not be limited to, all reasonable costs of defense and
investigation and all reasonable attorneys' fees) to which the Company or any
such officer, director or controlling person may become subject under the 1933
Act or otherwise, insofar as such losses, claims, damages or liabilities (or
actions in respect thereof; arise out of or are based upon any untrue statement
or alleged untrue statement of any material fact contained in the Registration
Statement, or any related preliminary prospectus, final prospectus, offering
circular, notification or amendment or supplement thereto, or arise out of or
are based upon the omission or the alleged omission to state therein a material
fact required to be stated therein or necessary to make the statements therein
not misleading, but in each case only to the extent that such untrue statement
or alleged untrue statement or omission or alleged omission was made in the
Registration Statement, preliminary prospectus, final prospectus, offering
circular, notification or amendment or supplement thereto in reliance upon, and
in conformity with, written information furnished to the Company by such
Distributing Holder, specifically for use in the preparation thereof.

               (c)    Promptly after receipt by an indemnified party under this
Section 6 of notice of the commencement of any action, such indemnified party
will, if a claim in respect thereof is to be made against the indemnifying party
under this Section 6, notify the indemnifying party of the commencement thereof;
but the omission so to notify the indemnifying party will not relieve the
indemnifying party from any liability which it may have to any indemnified party
except to the extent of actual prejudice demonstrated by the indemnifying party.
In case any such action is brought against any indemnified party, and it
notifies the indemnifying party of the commencement thereof, the indemnifying
party will be entitled to participate in, and, to the extent that it may wish,
jointly with any other indemnifying party similarly notified, assume the defense
thereof, subject to the provisions herein stated and after notice from the
indemnifying party to such indemnified party of its election so to assume the
defense thereof, the indemnifying party will not be liable to such



                                       9
<PAGE>   65


indemnified party under this Section 6 for any legal or other expenses
subsequently incurred by such indemnified party in connection with the defense
thereof other than reasonable costs of investigation, unless the indemnifying
party shall not pursue the action to its final conclusion. The indemnified party
shall have the right to employ separate counsel in any such action and to
participate in the defense thereof, but the fees and expenses of such counsel
shall not be at the expense of the indemnifying party if the indemnifying party
has assumed the defense of the action with counsel reasonably satisfactory to
the indemnified party; provided that if the indemnified party is the
Distributing Holder, the fees and expenses of such counsel shall be at the
expense of the indemnifying party if (i) the employment of such counsel has been
specifically authorized in writing by the indemnifying party, or (ii) the named
parties to any such action (including any impleaded parties) include both the
Distributing Holder and the indemnifying party and the Distributing Holder shall
have been advised by such counsel that there may be one or more legal defenses
available to the indemnifying party different from or in conflict with any legal
defenses which may be available to the Distributing Holder (in which case the
indemnifying party shall not have the right to assume the defense of such action
on behalf of the Distributing Holder, it being understood, however, that the
indemnifying party shall, in connection with any one such action or separate but
substantially similar or related actions in the same jurisdiction arising out of
the same general allegations or circumstances, be liable only for the reasonable
fees and expenses of one separate firm of attorneys for the Distributing Holder,
which firm shall be designated in writing by the Distributing Holder). No
settlement of any action against an indemnified party shall be made without the
prior written consent of the indemnified party, which consent shall not be
unreasonably withheld.

         Section 7. Contribution. In order to provide for just and equitable
contribution under the 1933 Act in any case in which (i) the indemnified party
makes a claim for indemnification pursuant to Section 6 hereof but is judicially
determined (by the entry of a final judgment or decree by a court of competent
jurisdiction and the expiration of time to appeal or the denial of the last
right of appeal) that such indemnification may not be enforced in such case
notwithstanding the fact that the express provisions of Section 6 hereof provide
for indemnification in such case, or (ii) contribution under the 1933 Act may be
required on the part of any indemnified party, then the Company and the
applicable Distributing Holder shall contribute to the aggregate losses, claims,
damages or liabilities to which they may be subject (which shall, for all
purposes of this Agreement, include, but not be limited to, all reasonable costs
of defense and investigation and all reasonable attorneys' fees), in either such
case (after contribution from others) on the basis of relative fault as well as
any other relevant equitable considerations. The relative fault shall be
determined by reference to, among other things, whether the untrue or alleged
untrue statement of a material fact or the omission or alleged omission to state
a material fact relates to information supplied by the Company on the one hand
or the applicable Distributing Holder on the other hand, and the parties'
relative intent, knowledge, access to information and opportunity to correct or
prevent such statement or omission. The Company and the Distributing Holder
agree that it would not be just and equitable if contribution pursuant to this
Section 7 were determined by pro rata allocation or by any other method of
allocation which does not take account of the equitable considerations referred
to in this Section 7. The amount paid or payable by an indemnified party as a
result of the losses, claims, damages or liabilities (or actions in respect
thereof) referred to above in this Section 7 shall be deemed to include any
legal or other expenses reasonably incurred by such indemnified party in



                                       10
<PAGE>   66


connection with investigating or defending any such action or claim. No person
guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of
the 1933 Act) shall be entitled to contribution from any person who was not
guilty of such fraudulent misrepresentation.

               Notwithstanding any other provision of this Section 7, in no
event shall any (i) Holder be required to undertake liability to any person
under this Section 7 for any amounts in excess of the dollar amount of the
proceeds to be received by such Holder from the sale of such Holder's
Registrable Securities (after deducting any fees, discounts and commissions
applicable thereto) pursuant to any Registration Statement under which such
Registrable Securities are to be registered under the Securities Act and (ii)
underwriter be required to undertake liability to any person hereunder for any
amounts in excess of the aggregate discount, commission or other compensation
payable to such underwriter with respect to the Registrable Securities
underwritten by it and distributed pursuant to the Registration Statement.

         Section 8.   Notices. All notices, demands, requests, consents,
approvals, and other communications required or permitted hereunder shall be in
writing and, unless otherwise specified herein, shall be (i) personally served,
(ii) deposited in the mail, registered or certified, return receipt requested,
postage prepaid, (iii) delivered by reputable air courier service with charges
prepaid, or (iv) transmitted by hand delivery, telegram, or facsimile, addressed
as set forth below or to such other address as such party shall have specified
most recently by written notice. Any notice or other communication required or
permitted to be given hereunder shall be deemed effective (a) upon hand delivery
or delivery by facsimile, with accurate confirmation generated by the
transmitting facsimile machine, at the address or number designated below (if
delivered on a business day during normal business hours where such notice is to
be received), or the first business day following such delivery (if delivered
other than on a business day during normal business hours where such notice is
to be received) or (b) on the second business day following the date of mailing
by reputable courier service, fully prepaid, addressed to such address, or upon
actual receipt of such mailing, whichever shall first occur. The addresses for
such communications shall be:


         If to the Company:                  Integrated Surgical Systems, Inc.
                                             1850 Research Park Drive
                                             Davis, CA  95616-4884
                                             Attention: Ramesh C. Trivedi
                                             Telephone: (530) 792-2600
                                             Facsimile:  (530) 792-2690

         with a copy to:                     Snow Becker Krauss P.C.
         (shall not constitute notice)       605 Third Avenue
                                             New York, NY  10158
                                             Attention:  Jack Becker
                                             Telephone: (212) 687-3860
                                             Facsimile:  (212) 949-7052



                                       11
<PAGE>   67


               If to the Holder:             As set forth in the signature page
                                             of the Purchase Agreement.

               Either party hereto may from time to time change its address
or facsimile number for notices under this Section 8 by giving at least ten (10)
days' prior written notice of such changed address or facsimile number to the
other party hereto.

         Section 9. Assignment. This Agreement is binding upon and inures to the
benefit of the parties hereto and their respective heirs, successors and
permitted assigns. The rights granted the Holder under this Agreement may be
assigned to any purchaser of substantially all of the Registrable Securities (or
the rights thereto) from Holder. In the event of a transfer of the rights
granted under this Agreement, the Holder agrees that the Company may require
that the transferee comply with reasonable conditions as determined in the
discretion of the Company.

         Section 10. Additional Covenants of the Company. The Company agrees
that at such time as it meets all the requirements for the use of Securities Act
Registration Statement on Form S-3 it shall file all reports and information
required to be filed by it with the Commission in a timely manner and take all
such other action so as to maintain such eligibility for the use of such form.

         Section 11. Counterparts/Facsimile. This Agreement may be executed in
two or more counterparts, each of which shall be constitute an original, but all
of which, when together shall constitute but one and the same instrument, and
shall become effective when one or more counterparts have been signed by each
party hereto and delivered to the other party. In lieu of the original, a
facsimile transmission or copy of the original shall be as effective and
enforceable as the original.

         Section 12.  Termination of Registration Rights. The rights granted
pursuant to this Agreement shall terminate as to each Holder (and permitted
transferees or assignees ) upon the occurrence of any of the following:

               (a)    all Holder's securities subject to this Agreement have
been registered and sold; or

               (b)    such Holder's securities subject to this Agreement may be
sold without such registration and without limitation as to volume pursuant to
Rule 144(k) promulgated by the SEC pursuant to the Securities Act.



                                       12
<PAGE>   68


         Section 13. Remedies. The remedies provided in this Agreement are
cumulative and not exclusive of any remedies provided by law. If any term,
provision, covenant or restriction of this Agreement is held by a court of
competent jurisdiction to be invalid, illegal, void or unenforceable, the
remainder of the terms, provisions, covenants and restrictions set forth herein
shall remain in full force and effect and shall in no way be affected, impaired
or invalidated, and the parties hereto shall use their best efforts to find and
employ an alternative means to achieve the same or substantially the same result
as that contemplated by such term, provision, covenant or restriction. It is
hereby stipulated and declared to be the intention of the parties that they
would have executed the remaining terms, provisions, covenants and restrictions
without including any of such that may be hereafter declared invalid, illegal,
void or unenforceable.

         Section 14. Conflicting Agreements. The Company shall not enter into
any agreement with respect to its securities that is inconsistent with the
rights granted to the holders of Registrable Securities in this Agreement or
otherwise conflicts with the provisions hereof. Without limiting the generality
of the foregoing, without the written consent of the Holders of a majority in
interest of the Registrable Securities, the Company shall not grant to any
person the right to request it to register any of its securities under the
Securities Act unless the rights so granted are subject in all respect to the
prior rights of the holders of Registrable Securities set forth herein, and are
not otherwise in conflict or inconsistent with the provisions of this Agreement.
The restrictions on the Company's rights to grant registration rights under this
paragraph shall terminate on the date of the Registration Statement to be filed
pursuant to Section 3(a) is declared effective by the Commission.

         Section 15. Headings.  The headings in this Agreement are for reference
purposes only and shall not affect in any way the meaning or interpretation of
this Agreement.

         Section 16. Governing Law. This Agreement shall be governed by and
construed in accordance with the laws of the State of New York, without regard
to the conflicts of law principles of such state. Each party hereto hereby
submits to the exclusive jurisdiction of the United States District Court for
the Southern District of New York and of any New York State Court sitting in New
York City for purposes of all legal proceedings arising out of or relating to
this Agreement. Each party hereto irrevocably waives, to the fullest extent
permitted by law, any objection which it may now or hereafter have to the laying
of the venue of any such proceeding brought in such a court has been brought in
an inconvenient forum. Each party hereto hereby irrevocably waives any and all
right to trial by jury in any legal proceeding arising out of or relating to
this Agreement.

         Section 17. Amendment and Waivers. This Agreement may be amended and
the Company may take any action herein prohibited, or omit to perform any act
herein required to be performed by it, only if the Company shall have obtained
the written consent to such amendment, action or omission to act, of the holder
or holders of the sum of the 85% or more of the shares of (i) Registrable
Securities issued at such time, plus (ii) Registrable Securities



                                       13
<PAGE>   69


issuable upon exercise or conversion of the Securities then constituting
derivative securities (if such Securities were not fully exercised or converted
in full as of the date such consent is sought). Each holder of any Registrable
Securities at the time or thereafter outstanding shall be bound by any consent
authorized by this Section 17, whether or not such Registrable Securities shall
have been marked to indicate such consent.

         Section 18. Severability. If any provision of this Agreement shall for
any reason be held invalid or unenforceable, such invalidity or unenforceablity
shall not affect any other provision hereof and this Agreement shall be
construed as if such invalid or unenforceable provision had never been contained
herein. Terms not otherwise defined herein shall be defined in accordance with
the Agreement.

         Section 19.  Capitalized Terms.  All capitalized terms not otherwise
defined herein shall have the meaning assigned to them in the Purchase
Agreement.

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed, on the day and year first above written.


                              INTEGRATED SURGICAL SYSTEMS, INC.



                              By:
                                 ----------------------------------------------
                                       Ramesh C. Trivedi
                                       Chief Executive Officer and President


                              HOLDER:



                              ----------------------------------------



                              By:
                                 ----------------------------------------
                                       Authorized Signatory



                                       14
<PAGE>   70

                                                                       EXHIBIT D


                                February 8, 2000


The Investors that are signatory to the Preferred Stock Purchase Agreement
between the Investors and Integrated Surgical Systems, Inc. dated as of February
8, 2000.

Ladies and Gentlemen:

         This opinion is furnished to you pursuant to the Preferred Stock
Purchase Agreement by and between Integrated Surgical Systems, Inc., a Delaware
corporation (the "Company"), and the Investors that are signatories thereto,
dated as of February 8, 2000 (the "Purchase Agreement"), which provides for the
issuance and sale by the Company of (i) 2,000 shares of the Series F Convertible
Preferred Stock of the Company and (ii) warrants to purchase 125,000 shares of
Common Stock of the Company (the "Warrant"). All capitalized terms used but not
defined herein shall have the meanings assigned to them in the Purchase
Agreement.

         We have acted as counsel to the Company in connection with the
negotiation of the Purchase Agreement, the Warrant and the Registration Rights
Agreement between the Investors and the Company, dated as of February 8, 2000
(the "Registration Rights Agreement", and together with the Purchase Agreement,
the "Agreements"). As such counsel, we have made such legal and factual
examinations and inquiries as we have deemed advisable or necessary for the
purpose of rendering this opinion. In addition, we have examined, among other
things, originals or copies of such corporate records of the Company,
certificates of public officials and such other documents and questions of law
that we consider necessary or advisable for the purpose of rendering this
opinion. In such examination we have assumed the genuineness of all signatures
on original documents, the authenticity and completeness of all documents
submitted to us as originals, the conformity to original documents of all copies
submitted to us as copies thereof, the legal capacity of natural persons, and
the due execution and delivery of all documents (except as to due execution and
delivery by the Company) where due execution and delivery are a prerequisite to
the effectiveness thereof. As to the matters of fact, we have relied upon
certificates or other written statements of public authorities and certificates
or other written statements of officers and directors of the Company. The
phrases "to our knowledge" or "known to us" when used herein mean that with
respect to the factual matter covered thereby, we have undertaken no independent
investigation or verification of such matters, but have relied solely


<PAGE>   71


upon the representations and warranties of the Company contained in the
Agreements and have obtained certificates from the officers and directors of the
Company as to such factual matters, and nothing has come to the attention of
those attorneys in our office who directly participated in this engagement that
(x) would give them actual knowledge or actual notice that such representation
or warranty is not accurate or complete, or (y) any information set forth in any
of the foregoing documents, certificates and information on which they have
relied is not accurate or complete. In addition, we have assumed that any
certificate of a public authority on which we have relied that was given or
dated earlier than the date of this opinion continues to remain accurate,
insofar as relevant to such opinion, from such earlier date through and
including the date of this opinion.

         For purposes of this opinion, we have assumed that each Investor has
all requisite power and authority, and has taken any and all necessary corporate
action, to execute and deliver the Agreements, and we are assuming that the
representations and warranties made by the Investors in the Agreements and
pursuant thereto are true and correct.

         Based upon and subject to the foregoing, we are of the opinion that:

         1.    The Company is a corporation duly organized, validly existing and
in good standing under the laws of the State of Delaware and has all requisite
corporate power and authority to carry on its business and to own, lease and
operate its properties and assets as described in the Company's SEC Documents.
To our knowledge, the Company does not have any subsidiaries and does not own
more than fifty percent (50%) of the outstanding capital stock of or control any
other business entity other than as disclosed in the SEC Documents. The Company
is duly qualified as a foreign corporation to do business and is in good
standing in every jurisdiction in which the Company owns or leases property,
other than those in which the failure so to qualify would not have a Material
Adverse Effect.

         2.    The Company has the requisite corporate power and authority to
enter into and perform its obligations under the Agreements and the Warrant and
to issue the Preferred Stock, the Conversion Shares, the Warrant and the Warrant
Shares. The execution and delivery of the Agreements by the Company and the
consummation by it of the transactions contemplated thereby have been duly
authorized by all necessary corporate action and no further consent or
authorization of the Company or its Board of Directors or stockholders is
required, except as may be required under the rules of the Nasdaq Stock Market,
Inc., as contemplated by the terms of the Preferred Stock (the "Nasdaq
Restriction"). Each of the Agreements has been duly executed and delivered and
the Preferred Stock and the Warrant have each been duly executed, issued and
delivered by the Company and each of the Agreements and the Warrant constitutes
valid and binding obligations of the Company enforceable against the Company in
accordance with their respective terms, except as such enforceability may be
limited by applicable bankruptcy, insolvency, or similar laws relating to, or
affecting generally the enforcement of, creditors' rights and remedies or by
other equitable principles of general application.


                                       2
<PAGE>   72


         3.    The execution, delivery and performance of the Agreements by the
Company and the consummation by the Company of the transactions contemplated
thereby, including, without limitation, the issuance of the Preferred Stock, the
Conversion Shares, the Warrant and the Warrant Shares, do not and will not (i)
result in a violation of the Company's Certificate of Incorporation or By-Laws;
(ii) to our knowledge, conflict with, or constitute a material default (or an
event that with notice or lapse of time or both would become a default) under,
or give to others any rights of termination, amendment, acceleration or
cancellation of, any material agreement, indenture, instrument or any "lock-up"
or similar provision of any underwriting or similar agreement to which the
Company is a party; or (iii) result in a violation of any federal or state law,
rule or regulation applicable to the Company or by which any property or asset
of the Company is bound or affected, except for such violations as would not,
individually or in the aggregate, have a Material Adverse Effect. To our
knowledge, the Company is not in violation of any terms of its Certificate of
Incorporation or Bylaws.

         4.    The issuance of the Preferred Stock, the Conversion Shares and
the Warrant in accordance with the Purchase Agreement, and the issuance of the
Warrant Shares in accordance with the Warrant, will be exempt from registration
under the Securities Act of 1933, as amended. When so issued, the Preferred
Stock, the Conversion Shares and the Warrant Shares will be duly and validly
issued, fully paid and nonassessable, and free of any liens, encumbrances and
preemptive or similar rights contained in the Company's Certificate of
Incorporation or Bylaws or, to our knowledge, in any agreement to which the
Company is party.

         5.    To our knowledge, there are no claims, actions, suits,
proceedings or investigations that are pending against the Company or its
properties, or against any officer or director of the Company in his or her
capacity as such, nor has the Company received any written threat of any such
claims, actions, suits, proceedings, or investigations which could reasonably be
expected to have a Material Adverse Effect. To our knowledge, the Company is not
a party to or subject to the provisions of any order, writ, injunction, judgment
or decree of any court or government agency or instrumentality.

         6.    To our knowledge, there are no outstanding options, warrants,
calls or commitments of any character whatsoever relating to, or securities,
rights or obligations convertible into or exchangeable for, or giving any right
to subscribe for or acquire any shares of Common Stock or contracts,
commitments, understandings, or arrangements by which the Company is or may
become bound to issue additional shares of Common Stock, or securities or rights
convertible or exchangeable into shares of Common Stock, except as described in
the SEC Documents.

         7.    Subject to compliance with the Nasdaq Restriction if and when the
same shall apply, the issuance of the Preferred Stock, the Conversion Shares and
the Warrant Shares will not violate the applicable listing agreement between the
Company and any securities exchange or market on which the Company's securities
are listed.



                                       3
<PAGE>   73


         8.    The authorized capital stock of the Company consists of
50,000,000 shares of Common Stock, $0.01 par value per share, and 1,000,000
shares of Preferred Stock, $0.01 par value per share, of which 3,520 shares have
been properly designated as Series A Convertible Preferred Stock, 1,000 shares
have been properly designated as Series B Convertible Preferred Stock, 750
shares have been properly designated as Series C Convertible Preferred Stock,
2,000 shares have been properly designated as Series D Convertible Preferred
Stock, 3,000 shares have been properly designated as Series E Convertible
Preferred Stock, and 2,000 have been properly designated as Series F Convertible
Preferred Stock.

               This opinion is limited to the Federal laws of the United States,
the laws of the State of New York and the Delaware General Corporation Law. No
opinion is expressed with respect to the laws, rules or regulations of any other
jurisdiction, whether U.S. or foreign.

               This opinion is furnished to the Investors solely for its benefit
in connection with the transactions described above and may not be relied upon
by any other person or for any other purpose without our prior written consent.



                                      Very truly yours,




                                      SNOW BECKER KRAUSS P.C.


                                       4
<PAGE>   74


                                                                       EXHIBIT E

                         INSTRUCTIONS TO TRANSFER AGENT
                        Integrated Surgical Systems, Inc.

February   ,2000

American Stock Transfer and Trust Company
40 Wall Street
New York, New York 10005
Attn: Barry Rosenthal

Dear Sirs:

Reference is made to the Preferred Stock Purchase Agreement and all Exhibits
thereto (the "Agreement") dated as of February , 2000, between the Investors
named therein and Integrated Surgical Systems, Inc. (the "Company"). Pursuant to
the Agreement, and subject to the terms and conditions set forth in the
Agreement, the Investors have agreed to purchase from the Company, and the
Company has agreed to sell to the Investors, shares of Series F Convertible
Preferred Stock of the Company, par value $0.01 per share (the "Preferred
Stock"), and the Company has issued to the Investors (i) 2,000 shares of Series
F Convertible Preferred Stock of the Company, par value $0.01 per share, and
(ii) a warrant to purchase 125,000 shares of Common Stock (the "Warrant"). As a
condition to the effectiveness of the Agreement, the Company has agreed to issue
to you, as the transfer agent for the Common Stock (the "Transfer Agent"), these
instructions relating to the Common Stock to be issued to the Investor (or a
permitted assignee) pursuant to the Agreement upon conversion of the Preferred
Stock or upon exercise of the Warrant. All terms used herein and not otherwise
defined shall have the meaning set forth in the Agreement.

1.       ISSUANCE  OF COMMON STOCK WITHOUT THE LEGEND

         Pursuant to the Agreement, the Company is required to prepare and file
with the Commission, and maintain the effectiveness of, a registration statement
or registration statements registering the resale of the Common Stock to be
acquired by the Investor (i) upon exercise of the Warrant and (ii) upon
conversion of the Series F Convertible Preferred Stock. The Company will advise
the Transfer Agent in writing of the effectiveness of any such registration
statement promptly upon its being declared effective. The Transfer Agent shall
be entitled to rely on such advice and shall assume that the effectiveness of
such registration statement remains in effect unless the Transfer Agent is
otherwise advised in writing by the Company and shall not be required to
independently confirm the continued effectiveness of such registration
statement. In the circumstances set forth in the following two paragraphs, the
Transfer Agent shall deliver to the Investor certificates representing Common
Stock not bearing the Legend without requiring further advice or instruction or
additional documentation from the Company or its counsel or the Investor or its
counsel or any other party (other than as described in such paragraphs).

         (a)   In the event the Company files a Form S-3 or Form S-1, S-2 or
SB-2 registration statement and such registration statement is declared
effective by the Securities and Exchange



<PAGE>   75


Commission in connection with any such event, the Investor (or its permitted
assignee) shall confirm in writing to the Transfer Agent that (i) the Investor
has sold, pledged or otherwise transferred or agreed to sell, pledge or
otherwise transfer such Common Stock in a bona fide transaction to a third party
that is not an affiliate of the Company; and (ii) the Investor confirms to the
transfer agent that the Investor has complied with the prospectus delivery
requirement.

         (b)   In the event a registration statement is not filed by the
Company, or for any reason the registration statement which is filed by the
Company is not declared effective by the Securities and Exchange Commission the
Investor, or its permitted assignee, or either of their brokers confirms to the
Transfer Agent that (i) the Investor has beneficially owned the shares of Common
Stock for at least one year, (ii) counting the shares surrendered as being sold
upon the date the unlegended Certificates would be delivered to the Investor (or
the Trading Day immediately following if such date is not a Trading Day), the
Investor will not have sold more than the greater of (a) one percent (1%) of the
total number of outstanding shares of Common Stock or (b) the average weekly
trading volume of the Common Stock for the preceding four weeks during the three
months ending upon such delivery date (or the Trading Day immediately following
if such date is not a Trading Day), and (iii) the Investor has complied with the
manner of sale and notice requirements of Rule 144 under the Securities Act.

Any advice, notice, or instructions to the Transfer Agent required or permitted
to be given hereunder may be transmitted via facsimile to the Transfer Agent's
facsimile number of (718) 259-1144.

2.       MECHANICS OF DELIVERY OF CERTIFICATES REPRESENTING COMMON STOCK

In connection with any conversion of Preferred Stock or exercise of a Warrant
pursuant to which the Investor acquires Common Stock under the Agreement, the
Transfer Agent shall deliver to the Investor, certificates representing Common
Stock (with or without the Legend, as appropriate) immediately upon request of
the Company, and, if the Transfer Agent is able to deliver such Common Stock to
the Investor's account pursuant to the DWAC system of the Depository Trust
Company, the Transfer Agent shall make delivery pursuant to such system and
provide the Investor with confirmation thereof in lieu of such Common Stock
certificates.

3.       FEES OF TRANSFER AGENT; INDEMNIFICATION

The Company agrees to pay the Transfer Agent for all fees incurred in connection
with these Irrevocable Instructions. The Company agrees to indemnify the
Transfer Agent and its officers, employees and agents, against any losses,
claims, damages or liabilities, joint or several, to which it or they become
subject based upon the performance by the Transfer Agent of its duties in
accordance with the Irrevocable Instructions.



                                        2
<PAGE>   76

4.       THIRD PARTY BENEFICIARY

The Company and the Transfer Agent acknowledge and agree that the Investor is an
express third party beneficiary of these Irrevocable Instructions and shall be
entitled to rely upon, and enforce, the provisions thereof.


                                      Integrated Surgical Systems, Inc.




                                      By:
                                         --------------------------------
                                               Ramesh C. Trivedi,
                                               Chief Executive Officer
                                               and President



AGREED:
AMERICAN STOCK TRANSFER
    AND TRUST COMPANY

By:
   --------------------------
Name:
Title:


                                        3

<PAGE>   1
                                                                     Exhibit 5.1

                             SNOW BECKER KRAUSS P.C.
                                605 Third Avenue
                            New York, New York 10158
                              Phone: (212) 687-3860
                               Fax: (212) 949-7052

                               February 14, 2000

Board of Directors
Integrated Surgical Systems, Inc.
1850 Research Park Drive
Davis, California 95616-4884

Ladies and Gentlemen:

                  You have requested our opinion, as counsel for Integrated
Surgical Systems, Inc., a Delaware corporation (the "Company"), in connection
with the registration statement on Form S-3 (the "Registration Statement"),
under the Securities Act of 1933, filed by the Company with the Securities and
Exchange Commission for the sale of 2,125,000 shares (the "Shares") of common
stock, $.01 par value (the "Common Stock"), by the selling securityholders named
in the Registration Statement, that they may acquire upon conversion of the
Company's Series F Convertible Preferred Stock (the "Preferred Stock") and
125,000 shares that they may acquire upon exercise of warrants (the "Warrants"),
as described in the Registration Statement.

                  We have examined such records and documents and made such
examinations of law as we have deemed relevant in connection with this opinion.
Based upon the foregoing, it is our opinion that:

         1.       The Company has been duly organized, is validly existing and
                  in good standing under the laws of the State of Delaware.

         2.       All of the Shares have been duly authorized.

         3.       The Shares issuable upon conversion of the Preferred Stock or
                  upon the exercise of the Warrants, when issued in accordance
                  with the terms of the Certificate of Designations authorizing
                  the issuance of the Preferred Stock or upon payment of the
                  exercise price specified in the Warrants, as the case may be,
                  will be legally issued, fully paid and nonassessable.

                  We hereby consent to the filing of this opinion as an exhibit
to the Registration Statement and to the reference to our firm under the caption
"Legal Matters" in the Registration Statement. In so doing, we do not admit that
we are in the category of persons whose consent is required under Section 7 of
the Act or the rules and regulations of the Securities and Exchange Commission
promulgated thereunder.

                                Very truly yours,

                                /s/ SNOW BECKER KRAUSS P.C.

<PAGE>   1
                                                                    Exhibit 23.2





               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS


                  We consent to the reference to our firm under the caption
"Experts" in the Registration Statement on Form S-3 and related Prospectus of
Integrated Surgical Systems, Inc. for the registration of 2,125,000 shares of
its common stock and to the incorporation by reference therein of our reports
dated February 12, 1999, with respect to the consolidated financial statements
of Integrated Surgical Systems, Inc. included in its Annual Report
(Form 10-KSB) for the year ended December 31, 1998 and its Proxy Statement
dated October 5, 1999, filed with the Securities and Exchange Commission.

                                                           /s/ ERNST & YOUNG LLP
Sacramento, California
February 8, 2000


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