SI DIAMOND TECHNOLOGY INC
8-K, 1997-07-25
GENERAL INDUSTRIAL MACHINERY & EQUIPMENT
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<PAGE>
 
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549


                                   FORM 8-K

                                CURRENT REPORT

    Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported)   7/25/97
                                                 ------------

                          SI DIAMOND TECHNOLOGY, INC.
              (Exact name of Registrant as specified in charter)

         TEXAS                       1-11602                  76-0273345
(State of Incorporation)    (Commission File Number)    (IRS Employer 
                                                         Identification Number) 

        12100 Technology Boulevard
              Austin, Texas                                   78727
   (Address of principal executive office)                  (Zip Code)


Registrant's telephone number, including area code: (512) 331-6200

                                Not Applicable
                                --------------
         (Former name or former address, if changed since last report)

                             --------------------
                             --------------------
<PAGE>
 
Item 5.   Other Events.

     In July 1997, the Company issued 1,700 shares of its Series G Preferred
Stock in a transaction under Regulation D promulgated under the Securities Act
of 1933, as amended (the "Securities Act"), for which the Company received
$1,700,000.  As of July 25, 1997, the Company also had commitments for the
issuance of an additional 300 shares of the Series G Preferred Stock for which
it will receive an additional $300,000.  The Company has authorized the issuance
of up to 3,000 shares of Series G Preferred Stock.  The Series G Preferred Stock
does not pay any dividends and has no voting rights except as otherwise required
by law.

     The shares of Series G Preferred Stock are convertible into shares of the
Company's common stock, par value $.001 (the "Common Stock"), at any time after
the earlier of (i) the effective date of a registration statement covering the
shares of Common Stock into which the Series G Preferred Stock is convertible
(the "Conversion Shares"), or (ii) 30 days after the date of issuance of the
Series G Preferred Stock.  Each share of Series G Preferred Stock is convertible
into the number of shares of Common Stock determined by dividing (i) the product
of (a) the original Issue Price of the shares of Series G Preferred Stock,
multiplied by (b) .10 times the number of years (or portion thereof) from the
date of issuance of the Series G Preferred Stock, by (ii) $1.00.  Each share of
Series G Preferred Stock outstanding on June 10, 2002 automatically shall be
converted into Common Stock on such date in accordance with the Conversion Price
and the other terms of conversion then in effect.

     The Company and the purchasers of the Series G Preferred Stock are also
parties to a Registration Rights Agreement.  Pursuant to such agreement the
Company will file a registration statement within 30 days covering the resale of
the Conversion Shares.  The Company is obligated to keep the registration
statement effective for one year.

     The Statement of Resolutions regarding the Series G Preferred Stock, the
Reg D Subscription Agreement and the Registration Rights Agreement are filed as
exhibits hereto and the foregoing description is qualified in its entirety by
reference thereto.

Item 7.   Financial Statements and Exhibits

     3.1  Statement of Resolutions Establishing and Designating the Company's
Series G Preferred Stock, as filed with the Secretary of State of the State of
Texas on June 11, 1997.

     4.1  Form of Regulation D Subscription Agreement by and between the Company
and the Holders of the Company's Series G Preferred Stock.

     4.2  Form of Registration Rights Agreement by and between the Company and
the Holders of the Company's Series G Preferred Stock.

     4.3  Form of Warrant by and between the Company and the Holders of the
Company's Series G Preferred Stock.
<PAGE>
 
     Pursuant to the Securities Act of 1934, the Registrant has duly caused this
report to be signed on its behalf by the undersigned, thereto duly authorized.


Dated: July 25, 1997


                                           SI DIAMOND TECHNOLOGY, INC.


                                           By:/s/ Douglas P. Baker
                                              ----------------------------  
                                                    Douglas P.  Baker
                                                   Vice President and
                                                 Chief Financial Officer

<PAGE>
 
                                                                     EXHIBIT 3.1

                 STATEMENT OF RESOLUTIONS OF BOARD OF DIRECTORS
                         OF SI DIAMOND TECHNOLOGY, INC.
             ESTABLISHING AND DESIGNATING SERIES OF PREFERRED STOCK
                  AS "SERIES G PREFERRED STOCK" AND FIXING AND
            DETERMINING THE RELATIVE RIGHTS AND PREFERENCES THEREOF



TO THE SECRETARY OF STATE OF THE STATE OF TEXAS:

     SI Diamond Technology, Inc., a Texas corporation (the "Corporation")
pursuant to the provisions of Article 2.13 of the Texas Business Corporation
Act, submits the following statement for the purpose of establishing and
designating a series of shares and fixing and determining the preferences,
limitations and relative rights thereof:

     I.   The name of the corporation is SI DIAMOND TECHNOLOGY, INC.

     II.  The Amended and Restated Articles of Incorporation of the Corporation
authorizes the issuance of up to 2,000,000 shares of Preferred Stock, $1.00 par
value per share, and expressly vests in the Board of Directors of the
Corporation the authority provided therein to issue any or all of said shares in
one or more series and by resolution or resolutions to establish the
designation, number, full or limited voting powers, or the denial of voting
powers, preferences and relative, participating, optional, and other special
rights and the qualifications, limitations, restrictions, and other
distinguishing characteristics of each series to be issued.

     III.  The Board of Directors of the Corporation, pursuant to the authority
expressly vested in it as aforesaid, has adopted the following resolutions
creating a Series G issue of Preferred Stock:

     RESOLVED, that Three Thousand (3,000) of the 2,000,000 authorized shares of
Preferred Stock of the Corporation shall be designated Series G Preferred Stock
(the "Series G Preferred Stock") and shall possess the rights and privileges set
forth below:

          A.   Par Value, Stated Value, Accretion Rate, Purchase Price and
Certificates.

          1.   Each share of Series G Preferred Stock shall have a par value of
$1.00, and a stated value (face amount) of One Thousand Dollars ($1,000) (the
"Stated Value"), with an accretion rate of ten percent (10%) per annum on the
Stated Value as set forth herein.

          2.   The Series G Preferred Stock shall be offered at a purchase price
of One Thousand Dollars ($1,000) per share.
<PAGE>
 
          3.   Certificates representing the shares of Series G Preferred Stock
purchased shall be issued by the Corporation to the purchasers immediately upon
acceptance of the subscriptions to purchase such shares.

          B.   Dividends.

               1.  The Series G Preferred Stock will bear no dividends, and the
holders of the Series G Preferred Stock shall not be entitled to the receipt of
dividends on the Series G Preferred Stock.

          C.   Liquidation Preference.

               1.   In the event of any liquidation, dissolution or winding-up
of the Corporation, either voluntary or involuntary (a "Liquidation"), the
holders of shares of the Series G Preferred Stock then issued and outstanding
shall be entitled to be paid out of the assets of the Corporation available for
distribution to its shareholders, whether from capital, surplus or earnings,
before any payment shall be made to the holders of shares of the Common Stock or
upon any other series of Preferred Stock of the Corporation with a liquidation
preference subordinate to the liquidation preference of the Series A or Series E
or Series F Preferred Stock, an amount per share equal to the sum of (i) the
Stated Value and (ii) an amount equal to ten percent (10%) of the Stated Value
multiplied by the fraction N/365, where N equals the number of days elapsed
since the issue date of the Series G Preferred Stock.  If, upon any Liquidation
of the Corporation, the assets of the Corporation available for distribution to
its shareholders shall be insufficient to pay the holders of shares of the
Series G Preferred Stock and the holders of any other series of Preferred Stock
with a liquidation preference equal to the liquidation preference of the Series
G Preferred Stock the full amounts to which they shall respectively be entitled,
the holders of shares of the Series G Preferred Stock and the holders of any
other series of Preferred Stock with liquidation preference equal to the
liquidation preference of the Series G Preferred Stock shall receive all of the
assets of the Corporation available for distribution and each such holder of
shares of the Series G Preferred Stock and the holders of any other series of
Preferred Stock with a liquidation preference equal to the liquidation
preference of the Series G Preferred Stock shall share ratably in any
distribution in accordance with the amounts due such shareholders.  In the event
of Liquidation, the Series G Preferred Stock shall be subordinate to Series A,
Series E and Series F Preferred Stock.  After payment shall have been made to
the holders of shares of the Series G Preferred Stock of the full amount to
which they shall be entitled, as aforesaid, the holders of shares of the Series
G Preferred Stock shall be entitled to no further distributions thereon and the
holders of shares of the Common Stock and of shares of any other series of stock
of the Corporation shall be entitled to share, according to their respective
rights and preferences, in all remaining assets of the Corporation available for
distribution to its shareholders.

               2.   A merger or consolidation of the Corporation with or into
any other corporation, or a sale, lease, exchange, or transfer of all or any
part of the assets of the Corporation which shall not in fact result in the
Liquidation (in whole or in part) of the 

                                       2
<PAGE>
 
Corporation and the distribution of its assets to its shareholders shall not be
deemed to be a voluntary or involuntary Liquidation (in whole or in part) of the
Corporation.

          D.   Conversion of Series G Preferred Stock.

               The holders of Series G Preferred Stock shall have the following
conversion rights:

               1.  Right to Convert.  Each share of Series G Preferred Stock
shall be convertible, on the Conversion Dates and at the Conversion Prices set
forth below, into fully paid and nonassessable shares of Common Stock (sometimes
referred to herein as "Conversion Shares").

               2.  Mechanics of Conversion.  Each holder of Series G Preferred
Stock who desires to convert the same into shares of Common Stock shall provide
notice ("Conversion Notice") via telecopy (facsimile) on a business day, during
business hours in Austin, Texas, to the Corporation, and a facsimile of the
Conversion Notice shall be transmitted to the Corporation's Transfer Agent at
the same time as transmission is made to the Corporation.  On the same day, the
original Conversion Notice shall be delivered to the Corporation but the
certificate or certificates representing the Series G Preferred Stock for which
conversion is elected, shall be delivered to the Transfer Agent by international
courier, duly endorsed.  The later of the date upon which the Corporation
receives the original Conversion Notice or the date the Transfer Agent receives
the Certificates representing the Series G Preferred Stock for which conversion
is elected, shall be a "Notice Date."

     Upon receipt by the Corporation of a Conversion Notice, as provided above,
the Corporation shall immediately send to the holder, via telecopy (facsimile),
a confirmation of receipt of the Conversion Notice which shall specify that the
Conversion Notice has been received and the name and telephone number of a
contact person at the Corporation whom the holder should contact regarding
information related to the conversion.  The Corporation shall use all reasonable
efforts to issue and deliver within three (3) business days after the Notice
Date, to such holder of Series G Preferred Stock at the address of the holder on
the stock books of the Corporation, a certificate or certificates for the number
of shares of Common Stock to which the holder shall be entitled as aforesaid;
provided that the original shares of Series G Preferred Stock to be converted
are received by the transfer agent or the Corporation within three (3) business
days after the receipt of the original Conversion Notice and the person or
persons entitled to receive the shares of Common Stock issuable upon such
conversion shall be treated for all purposes as the record holder or holders of
such shares of Common Stock on the Notice Date.  If the original certificate(s)
representing the shares of Series G Preferred Stock to be converted are not
received by the transfer agent or the Corporation within three (3) business days
after the receipt of the original Conversion Notice, the Conversion Notice shall
become null and void.

                                       3
<PAGE>
 
               3.  Lost or Stolen Certificates. Upon receipt by the Corporation
of evidence reasonably satisfactory to it of the loss, destruction, theft or
mutilation of any Series G Preferred Stock certificates (the "Certificates") and
(in the case of loss, theft or destruction) of indemnity or security reasonably
satisfactory to the Corporation, and upon surrender and cancellation of the
Certificates, if mutilated, the Corporation shall execute and deliver new Series
G Preferred Stock Certificates of like tenor and date. However, the Corporation
shall not be obligated to re-issue such lost or stolen Series G Preferred Stock
Certificates if the holder thereof contemporaneously requests the Corporation to
convert such Series G Preferred Stock into Common Stock, in which event the
Corporation shall be entitled to rely on an affidavit of loss, destruction or
theft of the Series G Preferred Stock Certificate (and the receipt of indemnity
or security reasonably satisfactory to the Corporation) or, in the case of
mutilation, tender of the mutilated certificate, and shall issue the Conversion
Shares.

               4.  Conversion Dates.  The shares of Series G Preferred Stock
shall become convertible into shares of Common Stock at any time commencing
after the earlier of (i) the effective date of a registration statement covering
the Conversion Shares; or (ii) thirty (30) days after the date of issuance of
the shares of Preferred Stock.  The date on which a Conversion Notice is
transmitted by facsimile to the Corporation shall be referred to as a
"Conversion Date".

               5.  Conversion Formula/Conversion Price.  Each share of Series G
Preferred Stock shall be convertible into the number of shares of Common Stock
in accordance with the following formula (the "Conversion Formula"):


                      [(.10) x (N/365) x (1,000)] + 1,000
                      -----------------------------------
                                Conversion Price

where,

          N =  the number of days between (i) the issue date of the Series G
     Preferred Stock being converted , and (ii) the Notice Date.

          Conversion
          Price =   $1.00


               6.  Automatic Conversion. Each share of Series G Preferred Stock
outstanding on June 10, 2002 automatically shall be converted into Common Stock
on such date in accordance with the Conversion Formula and the Conversion Price
then in effect, and June 10, 2002 shall be deemed to be the Notice Date and
Conversion Date with respect to such conversion.

               7.  No Fractional Shares. If any conversion of the Series G
Preferred Stock would create a fractional share of Common Stock or a right to
acquire a fractional share of 

                                       4
<PAGE>
 
Common Stock, no fractional shares shall be issued and an equivalent of the
fractional share shall be paid in cash.

               8.  Reservation of Stock Issuable Upon Conversion. The
Corporation shall at all times reserve and keep available out of its authorized
but unissued shares of Common Stock, solely for the purpose of effecting the
conversion of the shares of the Series G Preferred Stock, such number of its
shares of Common Stock as shall from time to time be sufficient to effect the
conversion of all then outstanding shares of the Series G Preferred Stock; and
if at any time the number of authorized but unissued shares of Common Stock
shall not be sufficient to effect the conversion of all then outstanding shares
of the Series G Preferred Stock, the Corporation will take such corporate action
as may be necessary to increase its authorized but unissued shares of Common
Stock to such number of shares as shall be sufficient for such purpose.

               9.   Adjustment to Conversion Price.

          (a) If, prior to the conversion of all shares of Series G Preferred
Stock, the number of outstanding shares of Common Stock is increased by a stock
split, stock dividend, or other similar event, the Conversion Price shall be
proportionately reduced, or if the number of outstanding shares of Common Stock
is decreased by a combination or reclassification of shares, or other similar
event, the Conversion Price shall be proportionately increased.

          (b) If, prior to the conversion of all shares of Series G Preferred
Stock, there shall be any merger, consolidation, exchange of shares,
recapitalization, reorganization, or other similar event, as a result of which
shares of Common Stock of the Corporation shall be changed into the same or a
different number of shares of the same or another class or classes of stock or
securities of the Corporation or another entity, then the holders of Series G
Preferred Stock shall thereafter have the right to purchase and receive upon
conversion of shares of Series G Preferred Stock, upon the basis and upon the
terms and conditions specified herein and in lieu of the shares of Common Stock
immediately theretofore issuable upon conversion, such shares of stock and/or
securities as may be issued or payable with respect to or in exchange for the
number of shares of Common Stock immediately theretofore purchasable and
receivable upon the conversion of shares of Series G Preferred Stock held by
such holders had such merger, consolidation, exchange of shares,
recapitalization or reorganization not taken place, and in any such case
appropriate provisions shall be made with respect to the rights and interests of
the holders of the Series G Preferred Stock to the end that the provisions
hereof (including, without limitation, provisions for adjustment of the
Conversion Price and of the number of shares issuable upon conversion of the
Series G Preferred Stock) shall thereafter be applicable, as nearly as may be
practicable in relation to any shares of stock or securities thereafter
deliverable upon the exercise hereof.  The Corporation shall not effect any
transaction described in this subsection unless the resulting successor or
acquiring entity (if not the Corporation) assumes by written instrument the
obligation to deliver to the holders of the Series G Preferred Stock such shares
of stock and/or securities as, in accordance with the foregoing provisions, the
holders of the Series G Preferred Stock may be entitled to purchase.

                                       5
<PAGE>
 
          (c) If any adjustment under this subsection would create a fractional
share of Common Stock or a right to acquire a fractional share of Common Stock,
no fractional shares shall be issued upon conversion and an equivalent of the
fractional share shall be paid in cash.

          E.   Voting.  Except as otherwise provided by the Texas Business
Corporation Act, the holders of the Series G Preferred Stock shall be entitled
to a number of votes equal to the number of shares of Common Stock into which
their respective shares of Series G Preferred Stock are then convertible using
the record date for the taking of such vote of shareholders as the date as of
which the Conversion Price is calculated.  Holders of the Series G Preferred
Stock shall be entitled to notice of all shareholder meetings or written
consents with respect to which they would be entitled to vote, which notice
would be provided pursuant to the Company's by-laws and applicable statutes.

          F.   Protective Provisions.  So long as shares of Series G Preferred
Stock are outstanding, the Corporation shall not, without first obtaining the
approval (by vote or written consent, as provided by law) of the Holders of at
least seventy-five percent (75%) of the then outstanding shares of Series G
Preferred Stock:

          (a) alter or change the rights, preferences or privileges of the
Series G Preferred Stock so as to affect adversely the Series G Preferred Stock;

          (b) create any new class or series of stock or issue any capital stock
senior to or having a preference over or parity with the Series G Preferred
Stock with respect to payments upon Liquidation or increase the number of
authorized shares of Series G Preferred Stock or change the Stated Value
thereof; or

          (c) do any act or thing not authorized or contemplated by this
Resolution which would result in taxation of the holders of shares of the Series
G 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).

          G.   Status of Converted Stock.  In the event any shares of Series G
Preferred Stock shall be converted as contemplated by this Statement, the shares
so converted shall be canceled, shall return to the status of authorized but
unissued Preferred Stock of no designated class or series, and shall not be
issuable by the Corporation as Series G Preferred Stock.

          H.   Taxes.  All shares of Common Stock issued upon conversion of
Series G Preferred Stock will be validly issued, fully paid and nonassessable.
The Corporation shall pay any and all documentary stamp or similar issue or
transfer taxes that may be payable in respect of any issue or delivery of shares
of Common Stock on conversion of Series G Preferred Stock pursuant hereto.  The
Corporation shall not, however, be required to pay any tax which may be payable
in respect of any transfer involved in the issue and delivery of shares of
Common Stock 

                                       6
<PAGE>
 
in a name other than that in which the Series G Preferred Stock so converted
were registered, and no such issue or delivery shall be made unless and until
the person requesting such transfer has paid to the Corporation the amount of
any such tax or has established to the satisfaction of the Corporation that such
tax has been paid or that no such tax is payable.

     FURTHER RESOLVED, that the statements contained in the foregoing
resolutions creating and designating the said Series G Preferred Stock and
fixing the number, powers, preferences and relative, optional, participating,
and other special rights and the qualifications, limitations, restrictions, and
other distinguishing characteristics thereof shall, upon the effective date of
said series, be deemed to be included in and be a part of the Amended and
Restated Articles of Incorporation of the Corporation pursuant to the provisions
of the Texas Business Corporation Act.

Signed on June 11, 1997.
                                   SI DIAMOND TECHNOLOGY, INC.


                                   By:/s/ Douglas P. Baker
                                      -----------------------------
                                      Douglas P. Baker
                                      Vice President and Chief Financial Officer

                                       7

<PAGE>
 
                                                                     EXHIBIT 4.1

                      REGULATION D SUBSCRIPTION AGREEMENT

     THE SECURITIES OFFERED HEREBY HAVE NOT BEEN REGISTERED WITH THE SECURITIES
     AND EXCHANGE COMMISSION OR ANY STATE OR OTHER SECURITIES AUTHORITIES.  THEY
     MAY NOT BE SOLD OR TRANSFERRED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION
     STATEMENT OR AN EXEMPTION TO THE REGISTRATION REQUIREMENTS OF THOSE
     SECURITIES LAWS.

     THIS SUBSCRIPTION AGREEMENT DOES NOT CONSTITUTE AN OFFER TO SELL, OR A
     SOLICITATION OF AN OFFER TO PURCHASE, ANY OF THE SECURITIES DESCRIBED
     HEREIN BY OR TO ANY PERSON IN ANY JURISDICTION IN WHICH SUCH OFFER OR
     SOLICITATION WOULD BE UNLAWFUL.  THESE SECURITIES HAVE NOT BEEN RECOMMENDED
     BY ANY FEDERAL, STATE OR FOREIGN SECURITIES AUTHORITIES, NOR HAVE ANY SUCH
     AUTHORITIES REVIEWED OR DETERMINED THE ACCURACY OF THIS DOCUMENT.  ANY
     REPRESENTATION TO THE CONTRARY IS UNLAWFUL.

     INVESTMENT IN THESE SECURITIES INVOLVES A HIGH DEGREE OF RISK, INCLUDING
     BUT NOT LIMITED TO THOSE RISK FACTORS IDENTIFIED IN THE COMPANY'S FORMS S-3
     FILED DURING 1997.  INVESTORS MUST RELY ON THEIR OWN ANALYSIS OF THE
     INVESTMENT TERMS AND CONDITIONS OF THE PROPOSED INVESTMENT AND THEIR OWN
     ASSESSMENT OF THE RISKS INVOLVED.

     This Regulation D Securities Subscription Agreement (the "Agreement") is
executed by the undersigned (the "Subscriber") in connection with the offer to
the Subscriber of, and the subscription by the Subscriber for, shares of Series
G Preferred Stock, $1.00 par value per share (the "Preferred Stock"), of SI
DIAMOND TECHNOLOGY, INC., a Texas corporation (the "Company").  Each share of
Preferred Stock has a stated value (i.e., as in the face amount) of One Thousand
Dollars ($1,000), and the purchase price for each share of Preferred Stock is
One Thousand Dollars ($1,000), which represents One Hundred percent (100%) of
the stated value. The Company is offering to qualified investors (the
"Offering") a minimum aggregate stated value (face amount) of Preferred Stock of
Two Million Dollars ($2,000,000) (representing 2,000 shares) for an aggregate
purchase price of Two Million Dollars ($2,000,000) (the "Minimum") and an
aggregate maximum stated value (face amount) of Preferred Stock of Three Million
Dollars ($3,000,000) (representing 3,000 shares) for an aggregate purchase price
of Three Million Dollars ($3,000,000) (the "Maximum").  The minimum subscription
per investor is one hundred (100) shares of Preferred Stock, representing a
stated value (face amount) of One Hundred Thousand Dollars ($100,000), and
representing a purchase price of One Hundred Thousand Dollars ($100,000).
Subject to approval by the Company, an investor may be eligible to subscribe for
a specific number of shares less than the minimum subscription per investor as
set forth herein. Each investor in the Company's Series G Preferred Stock shall
also receive warrants to purchase 
<PAGE>
 
that number of shares of the Company's Common Stock, exercisable at a price of
$1.00 per share of Common Stock, that is equivalent to one-half of the number of
shares of Common Stock into which the Preferred Stock purchased by an investor
is convertible. A form of warrant is attached to this Agreement as Exhibit "F."

     The terms of the Preferred Stock, including the terms on which the
Preferred Stock may be converted into common stock, $.001 par value, of the
Company (the "Common Stock"), are set forth in the Statement of Resolutions of
Series G Preferred Stock (the "Statement of Resolutions"), substantially in the
form attached hereto as Exhibit A.  The solicitation of this Subscription by the
Company, and, if accepted by the Company, the sale of the shares of Preferred
Stock subscribed for, are being made in reliance upon the provisions of
Regulation D ("Regulation D") promulgated under the Securities Act of 1933, as
amended (the "Securities Act").  The Preferred Stock and the Common Stock
issuable upon conversion thereof (the "Conversion Shares") are sometimes
referred to herein collectively as the "Securities."

     The undersigned Subscriber and the Company, upon acceptance of this
Agreement, hereby agree as follows:

     1.   Offering

          1.1  Offer to Subscribe; Purchase Price and Closing; and Placement
     Fees.

     Subject to satisfaction of the conditions to the closing of a purchase and
sale of Preferred Stock as to each purchaser of Preferred Stock (the "Closing")
set forth in Section 1.2 below, the Subscriber hereby offers to subscribe for
and purchase shares of Preferred Stock, for the aggregate purchase price set
forth in Section 8 of this Agreement, all in accordance with the terms and
conditions of this Agreement.  Assuming that funds representing the Offering,
together with corresponding subscription agreements are delivered to the
Company, the Closing shall be deemed to occur when this Agreement has been
executed by both the Subscriber and the Company, and full payment for the shares
of Preferred Stock subscribed for shall have been made by the Subscriber, by
wire transfer in United States Dollars, to the Company's Account as set forth in
Section 7.1(a) in consideration for the Company's delivery of certificates
representing the shares of Preferred Stock so subscribed for.


          1.2 Conditions to Subscriber's Obligations. The Subscriber's
obligations hereunder are conditioned upon the occurrence of all of the
following:

          (a) the Statement of Resolution shall have been filed with the
              Secretary of State of Texas;

          (b) the Company's Common Stock is currently traded on the Nasdaq
              SmallCap Stock Market;

                                       2
<PAGE>
 
          (c) other than as described on Schedule 1.2 attached hereto, there
          have been no material adverse changes in the Company's business
          prospects or financial condition since the date of the last balance
          sheet included in the Disclosure Documents (as defined below in
          Section 4.2);

          (d) the representations and warranties of the Company shall be true
          and correct in all material respects on the date of Closing, as if
          made on such date;

          (e) the Subscription Agreement has been accepted by the Company; and

          (f) the Company shall have reserved for issuance upon conversion of
          the Preferred Stock a sufficient number of Conversion Shares, which
          number of shares shall initially be equal to Three Million (3,000,000)
          shares.


     2.   Representations and Warranties of the Subscriber.  The Subscriber
hereby represents and warrants to the Company as follows (which representations
and warranties shall be true as of the date of Closing):

          2.1  Accredited Investor.  The Subscriber hereby represents and
warrants to the Company that it is an "accredited investor," as defined in Rule
501 of Regulation D, and has marked the applicable box set forth in Section 9 of
this Agreement signifying such status.

          2.2  Investment Experience; Access to Information; Independent
     Investigation.

                2.2.1 Access to Information. The Subscriber or its professional
advisor has been granted the opportunity to ask questions of and receive answers
from representatives of the Company, and its officers, directors, employees and
agents concerning the terms and conditions of the Offering, and the Company and
its business and prospects, and to obtain any additional information which the
Subscriber or its professional advisor deems necessary to verify the accuracy of
the information received. The foregoing, however, does not limit or modify the
Subscriber's right to rely upon representations and warranties of the Company in
Section 4 of this Agreement.

                2.2.2 Ability to Evaluate. The Subscriber has such knowledge and
experience in financial and business matters that it is fully capable of
evaluating the merits and risks of an investment in the Company, including
without limitation those set forth in the Disclosure Documents (as defined below
in Section 4.2).

                2.2.3 Disclosure Documents.  The Subscriber has received and
reviewed the Disclosure Documents (as defined below in Section 4.2).  The
foregoing, however, does not limit or modify the Subscriber's right to rely upon
the representations and warranties of the Company in Section 4 of this
Agreement.

                                       3
<PAGE>
 
                2.2.4  Investment Experience; Fend for Self.  The Subscriber has
substantial experience in investing in securities and has made investments in
securities other than those of the Company.  The Subscriber acknowledges that it
is able to fend for itself in the transaction contemplated by this Agreement and
that it has the ability to bear the economic risk of its investment in the
Company.  The Subscriber has not been organized for the purpose of investing in
securities of the Company.

                2.2.5  Not an Affiliate.  The Subscriber is not an officer,
director or "affiliate" (as that term is defined in Rule 415 of the Securities
Act) of the Company.

          2.3  Exempt Offering Under Regulation D

                2.3.1  Investment; No Distribution.  The Subscriber is acquiring
the shares of Preferred Stock subscribed for (the "Preferred Shares") solely for
investment purposes for the Subscriber's own account (or for beneficiaries'
accounts over which the Subscriber has investment discretion but no
discretionary authority as to voting or disposition) and not with a view to a
distribution of all or any part thereof.  The Subscriber is aware that there are
legal and practical limits on its ability to sell or dispose of the Preferred
Shares and the Conversion Shares (collectively, the "Securities"), and
therefore, that the Subscriber must bear the economic risk of its investment for
an indefinite period of time.  The Subscriber has adequate means of providing
for its current needs and anticipated contingencies and has no need for
liquidity of this investment. The Subscriber's commitment to illiquid
investments is reasonable in relation to its net worth.

                2.3.2  No General Solicitation.  The Preferred Shares were not
offered to the Subscriber through, and the Subscriber is not aware of, any form
of general solicitation or general advertising, including, without limitation,
(i) any advertisement, articles, notice or other communication published in any
newspaper, magazine or similar media or broadcast over television or radio, and
(ii) any seminar or meeting whose attendees have been invited by any general
solicitation or general advertising.

                2.3.3 No Registration of Preferred Shares and Conversion Shares.
The Subscriber understands that the Preferred Shares are not registered and
therefore are "restricted securities" under the federal securities laws inasmuch
as they are being acquired from the Company in a transaction not involving a
public offering, and that, under such laws and applicable regulations, such
securities may not be transferred or resold without registration under the
Securities Act or pursuant to an exemption therefrom. In this connection, the
Subscriber represents that it is familiar with Rule 144 under the Securities
Act, as presently in effect, and understands the resale limitations imposed
thereby and by the Securities Act. The Subscriber further understands, however,
that the Company is obligated to register the Conversion Shares within thirty
(30) days from the date of the Closing (the "Closing") of a purchase and sale of
Preferred Stock.

                                       4
<PAGE>
 
                2.3.4  Disposition.  Without in any way limiting the
representations set forth above, the Subscriber further agrees not to make any
disposition of all or any portion of the Securities unless and until:

          (a)  There is then in effect a registration statement under the
               Securities Act covering such proposed disposition and such
               disposition is made in accordance with such Registration
               Statement; or

          (b)  (i) The Subscriber shall have notified the Company of the
               proposed disposition and shall have furnished the Company with a
               detailed statement of the circumstances surrounding the proposed
               disposition, and (ii) if reasonably requested by the Company, the
               Subscriber shall have furnished the Company with an opinion of
               counsel, reasonably satisfactory to the Company, that such
               disposition will not require registration of the Securities under
               the Securities Act.

          2.4  Due Authorization.

                2.4.1 Authority. The Subscriber, if executing this Subscription
Agreement in a representative or fiduciary capacity, has full power and
authority to execute and deliver this Subscription Agreement and each other
document referred to herein for which a signature is required in such capacity
and on behalf of the subscribing individual, partnership, trust, estate,
corporation or other entity for whom or which the Subscriber is executing this
Subscription Agreement.

                2.4.2  Due Authorization.  The Subscriber is duly and validly
organized, validly existing and in good standing as such entity under the laws
of the jurisdiction of its organization, with full power and authority to
purchase the Preferred Shares subscribed for and to execute and deliver this
Agreement.

     3. Acknowledgements.  The Subscriber is aware of the following:

          3.1  Risks of Investment.  The Subscriber recognizes that investment
in the Company involves certain risks, including the potential loss of the
Subscriber's investment herein. The Subscriber recognizes that this Agreement
and the exhibits hereto do not purport to contain all the information which
would be contained in a registration statement under the Securities Act;

          3.2  No Government Approval.  The Subscriber acknowledges that no
federal, state or foreign agency has passed upon or reviewed the terms and
conditions of the Offering or made any finding or determination as to the
fairness of the Offering;

          3.3  Restrictions on Transfer.  The Subscriber may not sell, transfer,
assign, pledge or otherwise dispose of all or any portion of the Securities in
the absence of either an 

                                       5
<PAGE>
 
effective registration statement or an exemption from the registration
requirements of the Securities Act and applicable state securities law;

          3.4  Exempt Transaction.  The Preferred Shares are being offered and
sold in reliance on specific exemptions from the registration requirements of
federal and state law and the Subscriber's representations, warranties,
agreements, acknowledgements and applicability of such exemptions and the
suitability of the Subscriber to acquire Preferred Shares.

          3.5  Legends.  It is understood that any certificates evidencing the
Preferred Shares and the Conversion Shares shall bear the following legend:

     "The securities represented hereby have not been registered under the
     Securities Act of 1933, as amended, or applicable state securities laws,
     nor the securities laws of any other jurisdiction.  They may not be sold or
     transferred in the absence of an effective registration statement under
     those securities laws or an opinion of counsel, reasonable satisfactory to
     the Company, that the sale or transfer is pursuant to an exemption to the
     registration requirements of those securities laws."

     4.   Representations and Warranties of the Company.  The Company hereby
makes the following representations and warranties to the Subscriber, except as
disclosed in the Disclosure Documents or otherwise disclosed to Subscriber,
which representations and warranties shall be true as of the date of acceptance
of this Agreement by the Company and as of Closing:

          4.1  Organization, Good Standing, and Qualification.  The Company is a
corporation duly organized, validly existing and in good standing under the laws
of the State of Texas, USA and has all requisite corporate power and authority
to carry on its business as now conducted and as currently proposed to be
conducted.  The Company is duly qualified to transact business and is in good
standing in each jurisdiction in which the failure to so qualify would have a
material adverse effect on the business or properties of the Company and its
subsidiaries taken as a whole.  The Company is not the subject of any pending
or, to its knowledge, threatened or contemplated investigation or administrative
or legal proceeding by the Internal Revenue Service, the taxing authorities of
any state or local jurisdiction, or the Securities and Exchange Commission, or
any state securities commission, or any other governmental entity, which are
required to be disclosed in the Disclosure Documents and have not been
disclosed.

          4.2  Corporate Condition.  The Company has timely filed all forms, and
reports and documents with the Securities and Exchange Commission required to be
filed by it under the Securities Exchange Act 1934, as amended (the "Exchange
Act") through the date hereof (collectively,the "SEC Reports").  Each of the SEC
Reports, at the time filed, complied in all material respects with the
requirements of the Exchange Act.  The Company has made available to the
Subscriber a copy of the Company's Form 10-KSB/A for the fiscal year ended
December 31, 1996, and a copy of the Company's Forms 10-QSB, 8-K and S-3 filed
by the Company since January 1, 1997 (the "Most Recent Filings Report").  Other
than as set forth in 

                                       6
<PAGE>
 
Schedule 4.2 attached hereto and made a part hereof, there have been no material
adverse changes in the Company's business, prospects, operations or financial
condition since the date of the Most Recent Filings Report. The SEC Reports,
together with Schedule 4.2 and any other documents listed on Schedule 4.2(a)
attached hereto and made a part hereof and furnished herewith by the Company to
the Subscriber are referred to collectively as the "Disclosure Documents." The
financial statements contained in the Disclosure Documents have been prepared in
accordance with generally accepted accounting principles, consistently applied,
and fairly present in all material respects the consolidated financial condition
of the Company as of the dates of the balance sheets included therein and the
consolidated results of its operations and cash flows for the periods then
ended. Without limiting the foregoing, there are no material liabilities,
contingent or actual that are not disclosed in the Disclosure Documents (other
than liabilities incurred by the Company in the ordinary course of its business,
consistent with its past practice, after the periods covered by the Disclosure
Documents). The Company has paid all material taxes which are due, except for
taxes which it reasonably disputes. There is no material claim, litigation, or
administrative proceeding pending, or, to the best of the Company's knowledge,
threatened or contemplated against the Company, except as disclosed in the
Disclosure Documents. This Agreement and the Disclosure Documents do not contain
any untrue statement of material fact and do not omit to state any material fact
required to be stated therein or herein necessary to make the statements
contained therein or herein not misleading in the light of the circumstances
under which they were made.

          4.3  Authorization.  All corporate action on the part of the Company
by its officers, directors and shareholders necessary for the authorization,
execution and delivery of this Agreement, the performance of all obligations of
the Company hereunder and the authorization, issuance and delivery of the
Preferred Shares and reservation for issuance of the Conversion Shares
obtainable on conversion of the Preferred Shares have been taken, and this
Agreement, the Statement of Resolutions and the Registration Rights Agreement
constitute valid and legally binding obligations of the Company, enforceable in
accordance with their terms; provided, however that enforceability is subject
to:  (i) applicable bankruptcy, reorganization, insolvency, moratorium,
fraudulent conveyance, and similar federal and state laws affecting the rights
and remedies of creditors generally, and (ii) general principles of equity
limiting the availability of equitable remedies (including but not limited to
the remedy of specific performance), whether considered in a proceeding at law
or in equity.  The Company has obtained all consents and approvals required for
it to execute, deliver and perform this Agreement and the Registration Rights
Agreement.

          4.4  Valid Issuance of Preferred Shares and Conversion Shares.  The
Preferred Shares, when issued, sold and delivered in accordance with the terms
hereof, for the consideration expressed herein, will be validly issued, fully
paid and nonassessable and, based in part upon the representations of the
Subscriber in this Agreement, will be issued in compliance with all applicable
federal and state securities laws.  The Conversion Shares when issued in
accordance with the terms of the Statement of Resolutions shall be duly and
validly issued and outstanding, fully paid and nonassessable, and based in part
on the representations and warranties of the 

                                       7
<PAGE>
 
Subscriber, will be issued in compliance with all applicable U.S. federal and
state securities laws. The Securities will be issued free of any preemptive
rights.

          4.5  Compliance with Other Instruments.  The Company is not in
violation or default of any provisions of its Amended and Restated Articles of
Incorporation or Bylaws as amended and in effect on and as of the date of this
Agreement or of any material provision of any material instrument or contract to
which it is a party or by which it is bound or, to its knowledge, of any
provision of any federal or state judgment, writ, decree, order, statute, rule
or governmental regulation applicable to the Company, which would have a
material adverse effect on the Company's business or prospects, except as
described in the Disclosure Documents.  The execution, delivery and performance
of this Agreement and the consummation of the transactions contemplated hereby
will not result in any such violation or be in conflict with or constitute, with
or without the passage of time and giving of notice, either a default under any
such provision, instrument or contract or an event which results in the creation
of any lien, charge or encumbrance upon any assets of the Company.

          4.6  Reporting Company.  The Company is subject to the reporting
requirements of the Exchange Act, and has a class of securities registered under
Section 12 or Section 15 of the Exchange Act.  When requested by the Subscriber,
the Company shall furnish copies of reports filed by the Company with the
Securities and Exchange Commission.

          4.7  Authorized and Issued Shares.  The authorized and issued shares
of Preferred Stock, Common Stock and warrants, options, instruments convertible
into Common Stock and rights to acquire Preferred or Common Stock, as of June 9,
1997, are as set forth on Exhibit D.

          4.8  Use of Proceeds.  As of the date hereof, the Company expects to
use the proceeds from the Offering (less fees and expenses) for the purposes set
forth on Exhibit E hereto. These purposes are estimates and are subject to
change, but represent the Company's good faith best estimate of anticipated
uses.

          4.9  Compliance with Laws.  As of the date hereof, the conduct of the
business of the Company complies in all material respects with all material
statutes, laws, regulations, ordinances, rules, judgments, orders or decrees
applicable thereto.  The Company has not received notice of any alleged
violation of any statute, law, regulations, ordinance, rule, judgement, order or
decree from any governmental authority.  The Company shall comply with all
applicable securities laws with respect to the Offering.

          4.10 No Rights of Participation.  No person or entity, including, but
not limited to, current or former shareholders of the Company, underwriters,
brokers, agents or other third parties, has any right of first refusal,
preemptive right, right of participation, or any similar right to participate in
the Offering  which has not been waived.

                                       8
<PAGE>
 
          4.11 Disclosures.  There is no fact known to the Company (other than
general economic conditions known to the public generally) that has not been
disclosed in the Disclosure Documents that (a) could reasonably be expected to
have a material adverse effect on the business, financial condition or results
of operations of the Company, or which could reasonably be expected to
materially and adversely affect the properties or assets of the Company or (b)
could reasonably be expected to materially and adversely affect the ability of
the Company to perform its obligations pursuant to this Agreement and the
issuance of the Securities.

          4.12 Representations True and Correct.  The foregoing representations,
warranties and agreements are true, correct and complete in all material
respects, and shall survive the Closing and the issuance of the Preferred
Shares.

          4.13 Termination Date of Offering.  In no event shall the Closing
occur later than August 10, 1997, with any extension based upon an agreement
between the Company and the Subscriber.


     5.   Covenants of the Company

          5.1  Independent Auditors.  The Company shall, until at least three
(3) years after the date of the Closing, maintain as its independent auditors an
accounting firm authorized to practice before the Securities and Exchange
Commission.

          5.2  Corporate Existence and Taxes.  The Company shall, until at least
three (3) years after the date of the Closing, maintain its corporate existence
in good standing (provided, however, that the foregoing covenant shall not
prevent the Company from entering into any merger or corporate reorganization so
long as the surviving entity in such transaction, if not the Company, assumes
all of the Company's obligations with respect to the Securities) and shall pay
all its taxes when due, except for taxes which the Company disputes.

          5.3  Registration of Conversion Shares.  The Company will register the
Conversion Shares on the terms of the Registration Rights Agreement
(substantially in the form attached as Exhibit B).

          5.4  Filings with Securities and Exchange Commission.  The Company
shall provide the Subscriber with copies of its annual reports on Form 10-KSB,
quarterly reports on Form 10-QSB and current reports on Form 8-K for as long as
the Preferred Shares remain outstanding.

          5.5  Opinion of Counsel.  Purchasers of the Preferred Stock shall,
upon purchase, receive an opinion letter from Haskell Slaughter & Young, L.L.C.,
counsel to the Company, substantially in the form Legal Opinion attached hereto
as Exhibit C.

                                       9
<PAGE>
 
          5.6  Payments for Late Conversion or Failure to Reserve Authorized but
Unissued Common.

                5.6.1 Payments for Late Conversion. As set forth in the
Statement of Resolutions, the Company shall use all reasonable efforts to issue
and deliver to the Subscriber or any party receiving Preferred Shares by
transfer from the Subscriber (together with the Subscriber, sometimes referred
to herein as the "Holder"), within three (3) business days (the "Deadline")
after the Holder has fulfilled all conditions and delivered all necessary
documents duly executed and in proper form, required for conversion pursuant to
the Statement of Resolutions, including the original certificate(s) representing
the Shares to be converted, all in accordance with the subscription documents
(or, in the case of lost or stolen certificates, after provision of security or
indemnification), a certificate or certificates for the number of shares of
Common Stock to which the Holder shall be entitled upon submission of a notice
of conversion. The Company understands that a delay in the issuance of the
Conversion Shares beyond the Deadline could result in economic loss to the
Holder. As compensation to the Holder for such loss, the Company agrees to pay
the Holder for late issuance of Conversion Shares upon Conversion one-fifth of
one percent (.002%) of the stated value of Preferred Shares submitted for
conversion for each business day beyond four business days after the Deadline
until the Conversion Shares are issued to Holder (up to a maximum of six percent
(6%) of such stated value).

     The Company shall pay any late payments to Holder incurred under this
Section in cash, or at the Company's option, in Company Common Stock in
accordance with the Conversion Formula set forth in the Statement of
Resolutions, upon the earlier to occur of: (i) issuance of Conversion Shares to
the Holder or (ii) each monthly anniversary of the receipt by the Company of
such Holder's Notice of Conversion.  Nothing herein shall limit the Holder's
right to pursue actual damages for the Company's failure to issue and delivery
Conversion Shares to the Subscriber in accordance with the terms of the
Statement of Resolutions.

                5.6.2 Payments for Failure to Reserve Authorized but Unissued
Common Stock. If, at any time a Holder or Holders of Shares submit a Notice of
Conversion (as defined in the Statement of Resolutions) and the Company does not
have sufficient authorized but unissued Conversion Shares available to effect,
in full, a conversion of the Series G Preferred Stock under Section 5 of the
Statement of Resolutions (a "Conversion Default", the date of such default being
referred to herein as the "Conversion Default Date"), the Company shall issue to
such Holder(s), pro rata, all of the Conversion Shares of Common Stock which are
available, and the Notice of Conversion as to any Conversion Shares of Series G
Preferred Stock requested to be converted but not converted (the "Unconverted
Preferred Conversion Shares") shall become null and void. The Company shall
provide notice of such Conversion Default ("Notice of Conversion Default") to
all Holders of outstanding Preferred Stock, by facsimile, within one (1)
business day of such default (with the original delivered by overnight or two
(2) day courier). No Holder may submit a Notice of Conversion after receipt of a
Notice of Conversion Default until the date additional Conversion Shares are
authorized by the Company. The Company will use best efforts to authorize an
appropriate number of additional shares as soon as practicable. If the Company
is

                                       10
<PAGE>
 
unable to cure the Conversion Default within forty-five (45) days, then the
Company agrees to make to all Holders of outstanding Preferred Shares a payment
(the "Conversion Default Payments") for a Conversion Default in the amount of
(N/365) X .10 X the stated value of the outstanding Preferred Stock held by each
Holder, where N=the number of days from the Conversion Default Date to the date
(the "Authorization Date") that the Company authorizes a sufficient number of
Conversion Shares to effect conversion of all remaining shares of Preferred
Stock. The Company shall send notice ("Authorization Notice") via facsimile,
with a copy by overnight or two (2) day courier, to all Holders of outstanding
Preferred Shares that additional Conversion Shares have been authorized, the
Authorization Date and the amount of Holder's accrued Conversion Default
Payments. The accrued Conversion Default Payments for each calendar month shall
be paid in cash or shall be convertible into Common Stock in accordance with the
Conversion Formula, at the Company's option, payable as follows: (i) in the
event Company elects to make such payment in cash, cash payments shall be made
to each Holder of outstanding Preferred Shares by the fifth (5th) day of the
following calendar month after the Authorization Notice was received or (ii) in
the event the Company elects to make such payment in stock, such payment amount
will be converted into Common Stock in accordance with the Conversion Formula at
any time after the fifth (5th) day of the calendar month following the month the
Authorization Notice was received, until the automatic conversion date set forth
in the Statement of Resolutions. Nothing herein shall limit the Holder's right
to seek actual damages for the Company's failure to maintain a sufficient number
of authorized Conversion Shares of Common Stock.

          5.7  Removal of Legend Upon Registration.  The restrictive legend
described in Section 3.5 above will be removed from the Common Stock after the
Registration Statement is effective and when the stock is to be sold.

          5.8  Listing.  The Company shall use its best efforts to maintain the
listing of its Conversion Shares and its Common Stock on the Nasdaq SmallCap
Stock Market or another national securities exchange or national quotation
system.

     6.   Miscellaneous

          6.1  Representations and Warranties Survive the Closing; Severability.
The Subscriber's and the Company's representations and warranties shall survive
the Closing of the transaction provided for hereby notwithstanding any due
diligence investigation made by or on behalf of the party seeking to rely
thereon.  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.

          6.2  Successors and Assigns.  The terms and conditions of this
Agreement shall inure to the benefit of and be binding upon the respective
successors and assigns of the parties. Nothing in this Agreement, express or
implied, is intended to confer upon any party other than the parties hereto or
their respective successors and assigns any rights, remedies, obligations, or

                                       11
<PAGE>
 
liabilities under or by reason of this Agreement, except as expressly provided
in this Agreement. Neither party may assign its rights hereunder without the
prior written consent of the other parties.

          6.3  Governing Law.  This Agreement shall be governed by and construed
under the laws of the State of Texas without respect to conflict of laws.

          6.4  Execution in Counterparts Permitted.  This Agreement may be
executed in any number of counterparts, each of  which shall be enforceable
against the parties actually executing such counterparts, and all of which
together shall constitute one (1) instrument.

          6.5  Titles and Subtitles; Gender.  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.  The use in this Agreement of a
masculine, feminine or neither pronoun shall be deemed to include a reference to
the others.

          6.6  Written Notices, Etc.  Any notice, demand or request required or
permitted to be given by the Company or the Subscriber pursuant to the terms of
this Agreement shall be in writing and shall be deemed given when delivered
personally, or by facsimile (with a hard copy to follow by overnight or two (2)
day courier), addressed to the parties at the addresses and/or facsimile
telephone number of the parties set forth at the end of this Agreement or such
other address as a party may request by notifying the other in writing.

          6.7  Expenses.  Each of the Company and the Subscriber shall pay all
costs and expenses that it respectively incurs, with respect to the negotiation,
execution, delivery and performance of this Agreement.

          6.8  Entire Agreement; Written Amendments Required.  This Agreement,
the Statement of Resolutions, the Preferred Stock certificates, the Registration
Rights Agreement and the other documents delivered pursuant hereto constitute
the full and entire understanding and agreement between the parties with regard
to the subjects hereof and thereof, and no party shall be liable or bound to any
other party in any manner by any warranties, representations or covenants except
as specifically set forth herein.  Neither this Agreement nor any terms hereof
may be amended, waived, discharged or terminated other than by a written
instrument signed by the party against whom enforcement of any such amendment,
waiver, discharge or termination is sought.

     7.   Subscription and Wiring Instructions; Irrevocability.

          7.1  Subscription

          (a) Wire transfer of Subscription Funds.  Subscriber shall send a
     signed Subscription Agreement by facsimile to the Company at (512) 250-
     2807, and its subscription funds by wire transfer, to the Company as
     follows:

                                       12
<PAGE>
 
               Bank:                Texas Commerce Bank
                                    P. O. Box 2558
                                    Houston, Texas 77252-8063
                                    Ph.  (713) 216-7000
               Account Name:        SI Diamond Technology, Inc.
               Account No.:         081-00053751
               ABA Routing No.:     113000609
 
          (b) Irrevocable Subscription. The Subscriber hereby acknowledges and
              agrees, subject to the provisions of any applicable laws providing
              for the refund of subscription amounts submitted by the
              Subscriber, that this Agreement is irrevocable and that the
              Subscriber is not entitled to cancel, terminate or revoke this
              Agreement; provided, however, that if the conditions to Closing
              are not satisfied or if the Disclosure Documents are discovered
              prior to Closing to contain statements which are materially
              inaccurate, or omit statements of material facts, the Subscriber
              may revoke or cancel this Agreement.

          (c) Company's Right to Reject Subscription. This Agreement shall be
              accepted by the Company when the Company countersigns this
              Agreement. The Subscriber hereby confirms that the Company has
              full right in its sole discretion to accept or reject the
              subscription of the Subscriber, in whole or in part, provided
              that, if the Company decides to reject such subscription, the
              Company must do so promptly and in writing. In the case of
              rejection, the Company will promptly return any rejected payments
              and (if rejected in whole) copies of all executed subscription
              documents (including without limitation this Agreement) to
              Subscriber.

          7.2  Acceptance of Subscription.  In the case of acceptance of this
subscription, ownership of the number of securities being purchased hereby will
pass to the Subscriber upon the Closing.

          7.3  Subscriber to Forward Original Signed Subscription Agreement to
Company.  The Subscriber agrees to courier to the Company its original inked
signed Subscription Agreement within three (3) days after faxing said signed
Agreement to the Company.

     8.   Number of Shares and Purchase Price.  The undersigned Subscriber
hereby subscribes for and agrees to purchase _________________ shares of Series
G Preferred Stock with a stated value of $1,000 per share and a per share
purchase price of $1,000, for a total purchase price (to be paid by wire
transfer) in the amount of ______________________________ Dollars
($____________) (the "Purchase Price").

     9.   Accredited Investor.  The Subscriber is (please check applicable box):

                                       13
<PAGE>
 
          (a)  [ ]  a corporation, business trust, or partnership not formed for
                    the specific purpose of acquiring the securities offered,
                    with total assets in excess of $5,000,000.

          (b)  [ ]  any trust, with total assets in excess of $5,000,000, not
                    formed for the specific purpose of acquiring the securities
                    offered, whose purchase is directed by a sophisticated
                    person who has such knowledge and experience in financial
                    and business matters that he is capable of evaluating the
                    merits and risks of the prospective investment.

          (c)  [ ]  an individual, who

               [ ]  is a director, executive officer or general partner of the
                    issuer of the securities being offered or sold or a
                    director, executive officer or general partner of a general
                    partner of that issuer.

               [ ]  has an individual net worth, or joint net worth with that
                    person's spouse, at the time of his purchase exceeding
                    $1,000,000.

               [ ]  had an individual income in excess of $200,000 in each of
                    the two most recent years or joint income with that person's
                    spouse in excess of $300,000 in each of those years and has
                    a reasonable expectation of reaching the same income level
                    in the current year.

          (d)  [ ]  an entity, each owner of which is an entity described in (a)
                    or (b) above or is an individual described in (c) above.

     The undersigned acknowledges that this Agreement and the subscription
represented hereby shall not be effective unless accepted by the Company as
indicated below.

                                       14
<PAGE>
 
     IN WITNESS WHEREOF, the undersigned Subscriber does hereby execute this
Agreement this _______ day of ________________, 1997.



______________________________           __________________________________ 
Name of Company You Represent            EXACT NAME IN WHICH YOU WANT
(if applicable)                          THE SECURITIES TO BE REGISTERED

                                         DELIVERY INSTRUCTIONS:
____________________________________     ---------------------
Your Signature                           Please type or print address where your
                                         security is to be delivered

                                                  
____________________________________     ATTN:_____________________________ 
Your Name:  Please Print


____________________________________     __________________________________
Title/Representative Capacity            Street Address
(if applicable)      


____________________________________     __________________________________ 
Place of Execution of this Agreement     City, State or Province, Country,
                                         Offshore Postal Code


                                         __________________________________
                                         Telephone Number


                                         __________________________________
                                         Facsimile Number

                                       15
<PAGE>
 
ACCEPTANCE BY COMPANY:


     THIS SUBSCRIPTION IS ACCEPTED BY THE COMPANY AND THE COMPANY AGREES TO BE
BOUND BY THE TERMS AND CONDITIONS THEREOF THIS _____ DAY OF
_______________________, 1997.



                         By:_______________________________

                         Name:_____________________________

                         Title:____________________________

                         Attest:___________________________

                         Name:_____________________________

                         Title:____________________________

                                       16
<PAGE>
 
                              NOTICE OF CONVERSION

   (To be Executed by the Registered Holder in order to Convert the Preferred
                                     Stock)

     The undersigned Holder hereby irrevocably elects to convert ___________
shares of Series G Preferred Stock, represented by stock certificate No(s).
______________ (the "Preferred Stock Certificates") into shares of common stock
("Common Stock") of SI Diamond Technology, Inc. (the "Company") according to the
conditions of the Statement of Resolutions of Series G Preferred Stock, as of
the date written below.  If shares are to be issued in the name of a person
other than the undersigned, the undersigned will pay all transfer taxes payable
with respect thereto and is delivering herewith such Certificates.  With respect
to those shares to be issued in the name of a person other than the Holder, the
Holder should execute a Notice of Transfer or Assignment Form with the signature
of the Holder and the signature of each other person in whose name the shares
are to be issued guaranteed by a commercial bank or trust company in the United
States or a member firm of the New york Stock Exchange.  No fee will be charged
to the Holder for any conversion, except for transfer taxes, if any.  A copy of
each of the Preferred Stock Certificates being converted its attached hereto.


Date of Conversion:_________________________

Applicable Conversion Price:___________________________

Number of Shares of
Common Stock to be Issued:_____________________________

Name of Holder:___________________________

By:_______________________________________

Title:____________________________________

Address:__________________________________
        __________________________________
        __________________________________
        
*Conversion shall be processed in accordance hereto and with the Statement of
Resolutions governing the Series G Preferred Stock.

                                       17
<PAGE>
 
                                  EXHIBIT "A"
                                  -----------

                         FORM STATEMENT OF RESOLUTIONS



                       FOLLOWS DIRECTLY BEHIND THIS PAGE

                                       18
<PAGE>
 
                                  EXHIBIT "B"
                                  -----------

                       FORM REGISTRATION RIGHTS AGREEMENT



                       FOLLOWS DIRECTLY BEHIND THIS PAGE

                                       19
<PAGE>
 
                                  EXHIBIT "C"
                                  -----------

                            FORM OPINION OF COUNSEL



                       FOLLOWS DIRECTLY BEHIND THIS PAGE

                                       20
<PAGE>
 
                                  EXHIBIT "D"
                                  -----------

                                 CAPITALIZATION



                          SI DIAMOND TECHNOLOGY, INC.
                            As of February 14, 1997
 
 
        --     14,975,255  Shares of Common Stock
        --            100  Shares of Series A Preferred Stock
        --            502  Shares of Series E Preferred Stock   -   - 
        --           1700  Shares of Series F Preferred Stock   -   -
        --      2,812,494  Options
        --      2,217,249  Warrants (of which 1,432,283 warrants are registered)
        --       $555,555  Principal Amount 8% Convertible Debentures
 

                                       21
<PAGE>
 
                                  EXHIBIT "E"
                                  -----------

                                USE OF PROCEEDS



                       Working Capital and Debt Reduction

                                       22
<PAGE>
 
                                  EXHIBIT "F"
                                  -----------


                                FORM OF WARRANT

                       FOLLOWS DIRECTLY BEHIND THIS PAGE

                                       23

<PAGE>
 
                                                                     EXHIBIT 4.2

                         REGISTRATION RIGHTS AGREEMENT


     THIS REGISTRATION RIGHTS AGREEMENT ("Agreement") is entered into as of
__________, 1997, by and between SI Diamond Technology, Inc., a Texas
corporation (the "Company") and the subscribers (hereinafter referred to as
"Subscribers" or "Investors") to the Company's offering ("Offering") of up to
Three Thousand (3000) shares of Series G Convertible Preferred Stock (the
"Preferred Stock") pursuant to the Regulation D Securities Subscription
Agreements between the Company and the Subscribers (the "Subscription
Agreements").

          1.   Definitions. For purposes of this Agreement:

          (a) The term "register", "registered," and "registration" refer to a
registration effected by preparing and filing a registration statement or
similar document in compliance with the Securities Act of 1933 (the "Act") and
pursuant to Rule 415 under the Act or any successor rule, and the declaration or
ordering of effectiveness of such registration statement or document;

          (b) The term "Registrable Securities" means the shares of the
Company's Common Stock, together with any capital stock issued in replacement
of, in exchange for or otherwise in respect of such Common Stock (the "Common
Stock"), issuable or issued upon conversion of the Preferred Stock (the
"Preferred Stock") issued to Subscribers in the Offering (as defined in the
Subscription Agreement);

          (c) The number of shares of "Registrable Securities then outstanding"
shall be determined by the number of shares of Common Stock which have been
issued or are issuable upon conversion of the Preferred Stock at the time of
such determination;

          (d) The term "Holder" means any person owning or having the right to
acquire Registrable Securities or any permitted assignee thereof;

          (e) The term "Initiating Holders" means (i) any holders of Registrable
Securities obtained or obtainable upon conversion of shares of Preferred Stock;
and

          (f) The term "Due Date" means the date which is thirty (30) days after
the Closing (as defined in the Subscription Agreement) of the Offering.

          (g) The terms "Offering" and "Closing" shall have the meanings
ascribed to them in the Subscription Agreement.

          2.   REQUIRED REGISTRATION.

          (a) Within thirty (30) days after the Closing of the Offering, the
Company shall have effective a registration statement ("Registration Statement")
on Form S-3 (or other suitable 
<PAGE>
 
form, at the Company's discretion but subject to the reasonable approval of the
Investors), covering the resale of all shares of Registrable Securities then
outstanding.

          (b) The Registration Statement shall be done as a "shelf" registration
statement under Rule 415, and shall be maintained effective until the
distribution described in the Registration Statement is completed or as
otherwise provided in Section 4(c).  The Company shall use its best efforts to
have the Registration Statement declared effective within thirty (30) days after
the Closing of the Offering.

          (c) If the Registration Statement is not declared effective by the Due
Date as a result of the Company's failure to file such Registration Statement
timely or failure to diligently strive to have such Registration Statement
declared effective by the Due Date, the Company shall pay the Investors an
amount equal to one and one-half percent (1.5%) per month of the aggregate
amount of Preferred Stock sold in the Offering, compounded monthly and accruing
daily, until the Registration Statement or a registration statement filed
pursuant to Section 2 is declared effective, payable in common stock, which
common stock shall also be deemed "Registrable Securities" for the purpose of
this Agreement.

          (d) If the Registration Statement is not declared effective by the Due
Date, but all the Registrable Securities held by an Investor are available for
sale by the Investor, in the opinion of counsel to the Investor (reasonably
acceptable to the Company to permit such sale) (the "Opinion"), without
compliance with the registration and prospectus delivery requirements of the
Act, so that all transfer restrictions and restrictive legends pertaining to the
Registrable Securities may be removed prior to and upon the consummation of such
sale, then registration contemplated hereby shall no longer be required with
respect to such Investor's Registrable Securities upon the furnishing to the
Company of the Opinion, and the Company will cooperate fully with the Investor
and use its best efforts to facilitate removal of restrictive legends and
transfer restrictions pertaining to the Registrable Securities.  Such efforts
shall include, but not be limited to, undertaking to furnish such opinions of
counsel to the Company as the Company's transfer agent may reasonably require.

          3.   OBLIGATIONS TO INCREASE THE NUMBER OF AVAILABLE SHARES. In the
event that the number of shares available under a registration statement filed
pursuant to Section 2 is insufficient to cover all of the Registrable Securities
then outstanding, the Company shall amend that registration statement, or file a
new registration statement, or both, so as to cover all shares of Registrable
Securities then outstanding.  The Company shall file such amendment or new
registration within thirty (30) days of the date the registration statement
filed under Section 2 is insufficient to cover all the shares of Registrable
Securities then outstanding.  Any Registration Statement filed hereunder shall,
to the extent permissible by the Rules of the Securities and Exchange Commission
("SEC"), state that, in accordance with Rule 416 under the Act, such
Registration Statement also covers such indeterminate numbers of additional
shares of Common Stock as may become issuable upon conversion of the Preferred
Stock to prevent dilution resulting from stock changes or by reason of changes
in the conversion price in accordance with the terms 

                                       2
<PAGE>
 
thereof. Unless and until such amendment or new registration statement is
effective after 30 days, Investors shall have the rights described in Section
2(c) above.

          4.   OBLIGATIONS OF THE COMPANY.  Whenever required under this
Agreement to effect the registration of any Registrable Securities, the Company
shall, as expeditiously as reasonably possible:

          (a) Prepare and file with the SEC a registration statement with
respect to such Registrable Securities and use its best efforts to cause such
registration statement to become effective.

          (b) Prepare and file with the SEC such amendments and supplements to
such registration statement and the prospectus used in connection with such
registration statement as may be necessary to comply with the provisions of the
Act with respect to the disposition of all securities covered by such
registration statement.

          (c) With respect to any Registration Statement filed pursuant to this
Agreement, keep such registration statement effective until the earlier of (i)
the date upon which the Holders of Registrable Securities covered by such
registration statement shall have sold such Registrable Securities; or (ii) one
(1) year after the date of the Closing of the Offering.

          (d) Furnish to the Holders such numbers of copies of a prospectus,
including a preliminary prospectus, in conformity with the requirements of the
Act, and such other documents as they may reasonably request in order to
facilitate the disposition of Registrable Securities owned by them.

          (e) Use its best efforts to register and qualify the securities
covered by such registration statement under such other securities or Blue Sky
laws of such jurisdictions as shall be reasonably requested by the Holders of
the Registrable Securities covered by such registration statement, provided that
the Company shall not be required in connection therewith or as a condition
thereto to qualify to do business or to file a general consent to service of
process in any such states or jurisdictions.

          (f) As promptly as practicable after becoming aware of such event,
notify each Investor of the happening of any event of which the Company 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, in light of the circumstances under which they were
made, not misleading, and use its best efforts promptly to prepare a supplement
or amendment to the Registration Statement to correct such untrue statement or
omission, and deliver a number of copies of such supplement or amendment to each
Investor as such Investor may reasonably request.

                                       3
<PAGE>
 
          (g) Provide Holders with written notice of the date that a
registration statement registering the resale of the Registrable Securities is
declared effective by the SEC.

          (h) Provide Holders and their representatives the opportunity to
conduct a reasonable due diligence inquiry of Company's pertinent financial and
other records and make available its officers, directors and employees for
questions regarding such information as it relates to information contained in
the registration statement, subject to all information received by the Holders
and their representatives being kept confidential.

          (i) Provide Holders and their representatives the opportunity to
review the registration statement and all amendments thereto a reasonable period
of time prior to their filing with the SEC.

          5.   FURNISH INFORMATION. It shall be a condition precedent to the
obligations of the Company to take any action pursuant to this Agreement with
regard to each selling Holder that such selling Holders shall furnish to the
Company such information regarding themselves, the Registrable Securities held
by them, and the intended method of disposition of such securities as shall be
required to effect the registration of their Registrable Securities or to
determine that registration is not required pursuant to Rule 144 or other
applicable provision of the Act.

          6.   EXPENSES OF REGISTRATION. All expenses, other than underwriting
discounts and commissions and fees and expenses of counsel to the selling
Holders, incurred in connection with the registrations pursuant to Section 2,
including (without limitation) all registration, filing and qualification fees,
printers' and accounting fees, fees and disbursements of counsel for the
Company, shall be borne by the Company.

          7.   INDEMNIFICATION. In the event any Registrable Securities are
included in a registration statement under this Agreement:

          (a) To the extent permitted by law, the Company will indemnify and
hold harmless each Holder, the officers and directors of each Holder, any
underwriter (as defined in the Act) for such Holder and each person, if any, who
controls such Holder or underwriter within the meaning of the Act or the
Securities Exchange Act of 1934, as amended (the " 1934 Act"), against any
losses, claims, damages, or liabilities (joint or several) to which they may
become subject under the Act, the 1934 Act or other federal or state law,
insofar as such losses, claims, damages, or liabilities (or actions in respect
thereof) arise out of or are based upon any of the following statements,
omissions or violations (collectively a "Violation"): (i) any untrue statement
or alleged untrue statement of a material fact contained in such registration
statement, including any preliminary prospectus or final prospectus contained
therein or any amendments or supplements thereto, (ii) 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, or (iii) any violation
by the Company of the Act, the 1934 Act, any state securities law or any rule or
regulation promulgated under the Act, the 1934 Act or any state securities law;
and the Company 

                                       4
<PAGE>
 
will reimburse each such Holder, officer or director, underwriter or controlling
person for any legal or other expenses reasonably incurred by them in connection
with investigating or defending any such loss, claim, damage, liability, or
action; provided, however, that the indemnity agreement contained in this
subsection 7(a) shall not apply to amounts paid in settlement of any such loss,
claim, damage, liability, or action if such settlement is effected without the
consent of the Company (which consent shall not be unreasonably withheld), nor
shall the Company be liable in any such case for any such loss, claim, damage,
liability, or action to the extent that it arises out of or is based upon a
Violation which occurs in reliance upon and in conformity with written
information furnished expressly for use in connection with such registration by
any such Holder, officer, director, underwriter or controlling person.

          (b) To the extent permitted by law, each selling Holder, severally and
not jointly, will indemnify and hold harmless the Company, each of its
directors, each of its officers who have signed the registration statement, each
person, if any, who controls the Company within the meaning of the Act, any
underwriter and any other Holder selling securities in such registration
statement or any of its directors or officers or any person who controls such
Holder, against any losses, claims, damages, or liabilities (joint or several)
to which the Company or any such director, officer, controlling person, or
underwriter or controlling person, or other such Holder or director, officer or
controlling person may become subject, under the Act, the 1934 Act or other
federal or state law, insofar as such losses, claims, damages, or liabilities
(or actions in respect thereto) arise out of or are based upon any Violation, in
each case to the extent (and only to the extent) that such Violation occurs in
reliance upon and in conformity with written information furnished by such
Holder expressly for use in connection with such registration; and each such
Holder will reimburse any legal or other expenses reasonably incurred by the
Company and any such director, officer, controlling person, underwriter or
controlling person, other Holder, officer, director, or controlling person in
connection with investigating or defending any such loss, claim, damage,
liability, or action; provided, however, that the indemnity agreement contained
in this subsection 7(b) shall not apply to amounts paid in settlement of any
such loss, claim, damage, liability or action if such settlement is effected
without the consent of the Holder, which consent shall not be unreasonably
withheld; provided, that, in no event shall any indemnity under this subsection
7(b) exceed the net purchase price of securities sold by such Holder under the
registration statement.

          (c) Promptly after receipt by an indemnified party under this Section
7 of notice of the commencement of any action (including any governmental
action), such indemnified party will, if a claim in respect thereof is to be
made against any indemnifying party under this Section 7, deliver to the
indemnifying party a written notice of the commencement thereof and the
indemnifying party shall have the right to participate in, and, to the extent
the indemnifying party so desires, jointly with any other indemnifying party
similarly noticed, to assume the defense thereof with counsel mutually
satisfactory to the parties; provided, however, that an indemnified party shall
have the right to retain its own counsel, with the reasonably incurred fees and
expenses of one such counsel to be paid by the indemnifying party, if
representation of such indemnified party by the counsel retained by the
indemnifying party would be inappropriate due to actual or 

                                       5
<PAGE>
 
potential conflicting interests between such indemnified party and any other
party represented by such counsel in such proceeding. The failure to deliver
written notice to the indemnifying party within a reasonable time of the
commencement of any such action, if prejudicial to its ability to defend such
action, shall relieve such indemnifying party of any liability to the
indemnified party under this Section 7, but the omission so to deliver written
notice to the indemnifying party will not relieve it of any liability that it
may have to any indemnified party otherwise than under this Section 7.

          (d) In the event that the indemnity provided in paragraph (a) or (b)
of this Section 7 is unavailable to or insufficient to hold harmless an
indemnified party for any reason, the Company and each holder of Registrable
Securities agree to contribute to the aggregate claims, losses, damages and
liabilities (including legal or other expenses reasonably incurred in connection
with investigating or defending same) (collectively "Losses") to which the
Company and one or more of the holders of Registrable Securities may be subject
in such proportion as is appropriate to reflect the relative fault of the
Company and the holders in connection with the statements or omissions which
resulted in such Losses; provided, however, that in no case shall any holder be
responsible for any amount in excess of the net purchase price of securities
sold by it under the registration statement.  Relative fault shall be determined
by reference to whether any alleged untrue statement or omission relates to
information provided by the Company or by the holders. The Company and the
holders agree that it would not be just and equitable if contribution were
determined by pro rata allocation or any other method of allocation which does
not take account of the equitable considerations referred to above.
Notwithstanding the provisions of this paragraph (d), no person guilty of
fraudulent misrepresentation (within the meaning of Section 11(f) of the Act)
shall be entitled to contribution from any person who was not guilty of such
fraudulent misrepresentation.  For purposes of this Section 7, each person who
controls a holder of Registrable Securities within the meaning of either the Act
or the 1934 Act and each director, officer, partner, employee and agent of a
holder shall have the same rights to contribution as such holder, and each
person who controls the Company within the meaning of either the Act or the 1934
Act and each director of the Company, and each officer of the Company who has
signed the registration statement, shall have the same rights to contribution as
the Company, subject in each case to the applicable terms and conditions of this
paragraph (d).

          (e) The obligations of the Company and Holders under this Section 7
shall survive the redemption and conversion, if any, of the Preferred Stock, the
completion of any offering of Registrable Securities in a registration statement
under this Agreement, and otherwise.

          8.   REPORTS UNDER SECURITIES EXCHANGE ACT OF 1934.  With a view to
making available to the Holders the benefits of Rule 144 promulgated under the
Act and any other rule or regulation of the SEC that may at any time permit a
Holder to sell securities of the Company to the public without registration, the
Company agrees to:

          (a) make and keep public information available, as those terms are
understood and defined in SEC Rule 144;

                                       6
<PAGE>
 
          (b) file with the SEC in a timely manner all reports and other
documents required of the Company under the Act and the 1934 Act; and

          (c) furnish to any Holder, so long as the Holder owns any Registrable
Securities, forthwith upon request (i) a written statement by the Company, if
true, that it has complied with the reporting requirements of SEC Rule 144, the
Act and the 1934 Act, (ii) a copy of the most recent annual or quarterly report
of the Company and such other reports and documents so filed by the Company, and
(iii) such other information as may be reasonably requested in availing any
Holder of any rule or regulation of the SEC which permits the selling of any
such securities without registration.

          9.   AMENDMENT OF REGISTRATION RIGHTS. Any provision of this Agreement
may be amended and the observance thereof may be waived (either generally or in
a particular instance and either retroactively or prospectively), only with the
written consent of the Company and the holders of seventy-five percent (75%) of
the Registrable Securities provided that the amendment treats all Holders
equally.  Any amendment or waiver effected in accordance with this paragraph
shall be binding upon each Holder, each future Holder, and the Company.

          10.  NOTICES.  All notices required or permitted under this Agreement
shall be made in writing signed by the party making the same, shall specify the
section under this Agreement pursuant to which it is given, and shall be
addressed if to (i) the Company at: 12100 Technology Blvd., Austin, Texas 78727,
Telephone No. (512) 250-2709, Facsimile No. (512) 250-2807, and (ii) the Holders
at their respective last address as the party shall have furnished in writing as
a new address to be entered on such register.  Any notice, except as otherwise
provided in this Agreement, shall be made by fax and shall be deemed given at
the time of transmission of the fax.

          11.  TERMINATION. This Agreement shall terminate on the earlier to
occur of (a) the date that is one (1) year from the date of the Closing or (b)
the date the resale by Holders of all Registrable Securities described in any
registration statement filed pursuant to this Agreement is completed; but
without prejudice to (i) the parties' rights and obligations arising from
breaches of this Agreement occurring prior to such termination or (ii) other
indemnification obligations under this Agreement.

          12.  ASSIGNMENT.  No assignment, transfer or delegation, whether by
operation of law or otherwise, of any rights or obligations under this Agreement
by the Company or any Holder, respectively, shall be made without the prior
written consent of the majority in interest of the Holders or the Company,
respectively; provided that the rights of a Holder may be transferred to a
subsequent holder of the Holder's Registrable Securities (provided such
transferee shall provide to the Company, a writing executed by such transferee
agreeing to be bound as a Holder by the terms of this Agreement); and provided
further that the Company may transfer its rights and obligations under this
Agreement to a purchaser of all or a substantial portion of its business if the
obligations of the Company under this Agreement are assumed in connection with

                                       7
<PAGE>
 
such transfer, either by merger or other operation of law (which may include
without limitation a transaction whereby the Registrable Shares are converted
into securities of the successor in interest) or by specific assumption executed
by the transferee.

          13.  MISCELLANEOUS.

          (a) Governing Law.  This Agreement shall be governed by and construed
in accordance with the laws of the State of Texas without giving effect to
conflict of laws.

          (b) Successors and Assigns.  Except as otherwise provided herein, the
provisions hereof shall inure to the benefit of, and be binding upon, the
successors, assigns, heirs, executors and administrators of the parties hereto.

          (c) Delays or Omissions.  No delay or omission to exercise any right,
power or remedy accruing to any holder of any Registrable Shares, upon any
breach or default of the Company under this Agreement, shall impair any such
right, power or remedy of such holder nor shall it be construed to be a waiver
of any such breach or default, or an acquiescence therein, or of or in any
similar breach or default thereunder occurring, nor shall any waiver of any
single breach or default be deemed a waiver of any other breach or default
thereafter occurring.  Any waiver, permit, consent or approval of any kind or
character on the part of any holder of any breach or default under this
Agreement, or any waiver on the part of any party of any provisions of
conditions of this Agreement, must be in writing and shall be effective only to
the extent specifically set forth in such writing.  All remedies, either under
this Agreement, or by law or otherwise afforded to any holder, shall be
cumulative and not alternative.

          (d) Counterparts.  This Agreement may be executed in any number of
counterparts, each of which may be executed by less than all of the Investors,
each of which shall be enforceable against the parties actually executing such
counterparts, and all of which together shall constitute one instrument.

          (e) Severability.  In the case any provision of this Agreement shall
be invalid, illegal or unenforceable, the validity, legality and enforceability
of the remaining provisions shall not in any way be affected or impaired
thereby.

                                       8
<PAGE>
 
          The foregoing Registration Rights Agreement is hereby executed as of
the date first above written.


SI DIAMOND TECHNOLOGY, INC.



By:______________________________
   
Name:____________________________
 
Title:___________________________
 
Title:___________________________

                                       9
<PAGE>
 
INVESTOR(S)


____________________________________ 
Investor's Name

 
By:_________________________________
          (Signature)
 
Name:_______________________________
 
Title:______________________________

Address:

____________________________________
____________________________________
____________________________________ 
____________________________________ 
 
 

                                       10

<PAGE>
 
                                                                     EXHIBIT 4.3

     THE SECURITIES REPRESENTED BY THIS WARRANT MAY NOT BE OFFERED FOR SALE,
     SOLD OR OTHERWISE TRANSFERRED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION
     STATEMENT MADE UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT"), OR
     PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE ACT, THE AVAILABILITY
     OF WHICH IS TO BE ESTABLISHED TO THE SATISFACTION OF THE COMPANY.

                                    WARRANT

                          SI DIAMOND TECHNOLOGY, INC.

               The Transferability of this Warrant is Restricted
                            as Provided in Article 3

     FOR GOOD AND VALUABLE consideration, the receipt of which is hereby
acknowledged by SI DIAMOND TECHNOLOGY, INC., 12100 Technology Boulevard, Austin,
Texas 78727, a Texas corporation (the "Company"), _____________________
("Holder") is hereby granted the right to purchase, at the initial exercise
price of $1.00 per share, _______ shares of the Company's common stock, $.001
par value (the "Common Shares").

     Subject to the further terms hereof, this Warrant shall be exercisable in
whole or in part at any time and from time to time prior to 5:00 p.m. on June
___, 2002.  This Warrant shall be exercisable only in the event that the
exercise is for, at a minimum, the lesser of (i) 10,000 Common Shares or (ii)
the remaining number of Common Shares which the registered holder of this
Warrant has the right to purchase thereunder.  Upon the expiration of the
applicable period for exercise of this Warrant, this Warrant shall no longer
entitle the holder thereof to acquire any shares of Common Shares or any other
security of the Company.  For the purposes of this Warrant, "Affiliates" or
"Affiliate" of Holder shall mean any person or entity that directly, or
indirectly through one or more intermediaries, controls, or is controlled by, or
is under common control with Holder.  "Control" in, of or by an Affiliate
requires ownership of more than fifty percent (50%) of (i) voting stock of a
company which issued voting stock, or (ii) ownership interest in any enterprise;
an entity or person is an Affiliate only as long as control exists.

     This Warrant initially is exercisable in whole or part as provided above at
a price of $1.00 per Share payable by wire transfer of collected funds, subject
to adjustment as provided in Article 5 hereof.  Upon surrender of this Warrant,
with the annexed Subscription Form duly executed, together with payment of the
Purchase Price (as hereinafter defined) for the Common Shares purchased, at the
offices of the Company, the registered holder of this Warrant shall be entitled
to receive a certificate or certificates for all the Common Shares.
<PAGE>
 
1.   EXERCISE OF WARRANT

     The purchase rights represented by this Warrant are exercisable at the
     option of the Holder hereof, in whole Common Shares only (but not as to
     fractional Common Shares underlying this Warrant), during any period in
     which this Warrant may be exercised as set forth above.

     If this Warrant is exercised in part only, the Company, upon surrender of
     this Warrant for cancellation, shall execute and deliver a new Warrant of
     like tenor evidencing the right of the holder to purchase the balance of
     the Common Shares purchasable hereunder.

2.   ISSUANCE OF CERTIFICATES

     Upon the exercise of this Warrant, the issuance of certificates for Common
     Shares underlying this Warrant shall be made forthwith (and in any event
     within five business days thereafter) without charge to the Holder hereof
     including, without limitation, any tax which may be payable in respect of
     the issuance thereof, and such certificates shall (subject to the
     provisions of Article 3 hereof) be issued in the name of, or in such names
     as may be directed by, the Holder hereof; provided, however, that the
     Company 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 such
     certificates in a name other than that of the Holder and the Company shall
     not be required to issue or deliver such certificates unless or until the
     person or persons requesting the issuance thereof shall have paid to the
     Company the amount of such tax or shall have established to the
     satisfaction of the Company that such tax has been paid.  The certificates
     representing the Common Shares underlying this Warrant shall be executed on
     behalf of the Company by the manual or facsimile signature of one of the
     present or any future Chairman or President of the Company and any present
     or future Vice President or Secretary of the Company.  Upon transfer of
     this Warrant in whole or in part to an Affiliate of Holder, such transferee
     shall be entitled to all the rights of a Holder hereof.

3.   RESTRICTION ON TRANSFER OF WARRANT AND COMMON SHARES

     The Holder of this Warrant, by its acceptance hereof, covenants and agrees
     that this Warrant and the Common Shares are being acquired as an investment
     and not with a view to the distribution thereof, and that the Warrant may
     not be exercised, and neither the Warrant nor the Shares may be sold,
     transferred, assigned, hypothecated or otherwise disposed of (other than to
     an Affiliate of Holder), in whole or in part unless in the opinion of
     counsel reasonably concurred in by the Company's counsel such transfer is
     in compliance with all applicable securities laws, after which this Warrant
     and the Common Shares shall again be subject to the restrictions contained
     in this Article 3.

                                     Page 2
<PAGE>
 
4.   PRICE

     4.1  Initial and Adjusted Purchase Price. The initial purchase price shall
          be $1.00 per Share. The adjusted purchase price shall be the price
          which shall result from time to time from any and all adjustments of
          the initial purchase price in accordance with the provisions of
          Article 5 hereof.

     4.2  Purchase Price. The term "Purchase Price" herein shall mean the
          initial purchase price or the adjusted purchase price, depending upon
          the context.

5.   ADJUSTMENTS OF PURCHASE PRICE AND NUMBER OF COMMON SHARES

     5.1  Subdivision and Combination

          In case the Company shall at any time subdivide or combine the
          outstanding Common Shares, the Purchase Price shall forthwith be
          proportionately decreased in the case of subdivision or increased in
          the case of combination.

     5.2  Reclassification, Consolidation, Merger, etc.

          In case of any reclassification or change of the outstanding Common
          Shares (other than a change in par value to no par value, or from no
          par value to par value, or as a result of a subdivision or
          combination), or in the case of any consolidation of the Company with,
          or merger of the Company into, another corporation (other than a
          consolidation or merger in which the Company is the surviving
          corporation and which does not result in any reclassification or
          change of the outstanding Common Shares, except a change as a result
          of a subdivision or combination of such shares or a change in par
          value, as aforesaid), or in the case of a sale or conveyance to
          another corporation of the property of the Company as an entirety, the
          Holder of this Warrant shall thereafter have the right to purchase
          upon the exercise of this Warrant the kind and number of shares of
          stock and other securities and property receivable upon such
          reclassification, change, consolidation, merger, sale or conveyance as
          if the Holder were the owner of the Common Shares underlying this
          Warrant immediately prior to any such events at the Purchase Price in
          effect immediately prior to the record date for such reclassification,
          change, consol idation, merger, sale or conveyance as if such Holder
          had exercised this Warrant.


6.   EXCHANGE AND REPLACEMENT OF WARRANT

     This Warrant is exchangeable without expense, upon the surrender hereof by
     the registered Holder at the principal executive office of the Company for
     new Warrants of like tenor and date representing in the aggregate the right
     to purchase the same number of Common 

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<PAGE>
 
     Shares as are purchasable hereunder in such denominations as shall be
     designated by the Holder hereof at the time of such surrender.

     Upon receipt by the Company of evidence reasonably satisfactory to it of
     the loss, theft, destruction or mutilation of this Warrant, and, in case of
     loss, theft or destruction, of indemnity or security reasonably
     satisfactory to it, and reimbursement to the Company of all reasonable
     expenses incidental thereto, and upon surrender and cancellation of this
     Warrant, if mutilated, the Company will make and deliver a new Warrant of
     like tenor, in lieu of this Warrant.

7.   ELIMINATION OF FRACTIONAL INTERESTS

     The Company shall not be required to issue certificates representing
     fractions of Common Shares on the exercise of this Warrant, nor shall it be
     required to issue scrip or pay cash in lieu of fractional interests, it
     being the intent of the parties that all fractional interests shall be
     eliminated.

8.   RESERVATION AND LISTING OF SECURITIES

     The Company shall at all times reserve and keep available out of its
     authorized Common Shares, solely for the purpose of issuance upon the
     exercise of this Warrant, such number of Common Shares as shall be issuable
     upon the exercise hereof and thereof.  The Company covenants and agrees
     that, upon exercise of this Warrant and payment of the Purchase Price
     therefor, all Shares issuable upon such exercise shall be duly and validly
     issued, fully paid and non-assessable.  The Company shall cause all Common
     Shares issuable upon exercise of this Warrant to be registered under the
     Securities Act of 1933, freely tradeable and listed (subject to official
     notice of issuance) on all securities exchanges on which the Common Shares
     may then be listed and/or quoted on NASDAQ, if any.

9.   NOTICES

     All notices, requests, consents and other communications hereunder shall be
     in writing and shall be deemed to have been duly given when delivered, or
     mailed by registered or certified mail, return receipt requested:

     9.1  If to the registered Holder of this Warrant, to the address of such
          Holder as shown on the books of the Company; or

     9.2  If to the Company, to the address set forth on the first page of this
          Warrant or to such other address as the Company may designate by
          notice to the Holders.

                                     Page 4
<PAGE>
 
10.  SUCCESSORS

     All the covenants, agreements, representations and warranties contained in
     this Warrant shall bind the parties hereto and their respective heirs,
     executors, administrators, distributors, successors and assigns.
     Assignability of registration rights is limited under the terms of this
     Warrant.

11.  HEADINGS

     The Article and Section headings in this Warrant are inserted for purposes
     of convenience   and shall have no substantive effect.

12.  LAW GOVERNING

     This Warrant shall be construed and enforced in accordance with, and
     governed by, the laws of the State of Texas.

     WITNESS the seal of the Company and the signature of its duly authorized
Officer.

                                      SI DIAMOND TECHNOLOGY, INC.


[ SEAL ]                              By:
                                         --------------------------------       
                                         Trey Fecteau
                                         Senior Vice President

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