ESS TECHNOLOGY INC
8-K, 1997-06-24
SEMICONDUCTORS & RELATED DEVICES
Previous: ESS TECHNOLOGY INC, S-8, 1997-06-24
Next: SPHERE DRAKE HOLDINGS LTD, SC 13D, 1997-06-24



<PAGE>   1
                       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): June 11, 1997

                              ESS TECHNOLOGY, INC.
             (Exact name of Registrant as specified in its charter)

      CALIFORNIA                    0-26660                     94-2928582
 (State or other                  (Commission                (I.R.S. Employer 
 jurisdiction of                   File Number)              Identification No.)
 incorporation or
  organization)

                            48401 FREMONT BOULEVARD
                            FREMONT, CALIFORNIA 94538
               (Address of principal executive offices) (Zip code)

                                 (510) 492-1088
              (Registrant's telephone number, including area code)

<PAGE>   2

Item 2. Acquisition or Disposition of Assets.

      Pursuant to the First Amended and Restated Agreement and Plan of
Reorganization, dated as of April 27, 1997 (the "Reorganization Agreement"), by
and among ESS Technology, Inc., a California corporation ("ESS"), EP Acquisition
Corporation, a California corporation and wholly-owned subsidiary of ESS
("Merger Sub"), and Platform Technologies, Inc., a California corporation
("Platform"), and the related Agreement of Merger (the "Merger Agreement") filed
with the California Secretary of State on June 11, 1997, Merger Sub was merged
with and into Platform (the "Merger"). As a result of the Merger, Platform has
become a wholly-owned subsidiary of ESS. The details of the announcement of the
Reorganization Agreement and the announcement of completion of the Merger are
contained in ESS's press releases dated April 16, 1997, April 29, 1997 and June
12, 1997 attached as exhibits hereto and incorporated by reference herein. The
acquisition is being accounted for as a purchase transaction.

      At the time the Merger became effective on June 11, 1997 (the "Effective
Time"), each issued and outstanding share of Platform Common Stock, Class B
Common Stock and Preferred Stock was converted into and exchanged for ESS
Common Stock as follows: (i) each share of Platform Common Stock was converted
into 0.3268199 of a share of ESS Common Stock; (ii) each share of Platform Class
B Common Stock was converted into and exchanged for 0.2282324 of a share of ESS
Common Stock; (iii) each share of Platform Series A Preferred Stock was
converted into and exchanged for 0.2434650 of a share of ESS Common Stock; (iv)
each share of Platform Series B Preferred Stock was converted into and exchanged
for 0.2891619 of a share of ESS Common Stock; (v) each share of Platform Series
C Preferred Stock was converted into and exchanged for 0.4567173 of a share of
ESS Common Stock. Each issued and outstanding option to purchase shares of
Platform Common Stock and Platform Class B Common Stock (collectively, the
"Platform Options") was converted into an option to purchase that number of
shares of ESS Common Stock determined by multiplying the number of Platform
shares subject to such Platform Option by the applicable exchange ratio set
forth above. The aggregate number of shares of Common Stock of ESS issued in
accordance with the terms of the Reorganization Agreement and the Merger
Agreement upon such conversion and exchange was 1,585,642 shares. An additional
954,346 shares of ESS Common Stock are issuable under outstanding options
assumed by ESS in the Merger. No fractional shares of ESS Common Stock were
issued or are issuable in connection with such conversion and exchange. In lieu
thereof, ESS has paid or will pay to the holders of fractional shares of ESS
Common Stock an amount in cash (rounded to nearest whole cent) equal to such
fractional share interest multiplied by $13.13.

      Under the terms of the Reorganization Agreement, a total of 158,556 shares
of ESS Common Stock issued as described in the preceding paragraph will be held
in escrow for the purpose of indemnifying ESS against certain liabilities of
Platform. The Escrow Period shall terminate with respect to the Escrow Shares
upon the first anniversary of the Effective Time. In addition, 10% of the shares
of ESS Common Stock issued upon exercise of the Platform Options will be held in
escrow for such purposes.

      ESS has granted the holders of the shares of ESS Common Stock issued in
the Merger certain registration rights for a period of one year following the
Effective Time.


                                      -2-

<PAGE>   3

      The amount of consideration paid in connection with the Merger was
determined in arms-length negotiations between officers of ESS and Platform. The
terms of the transaction were approved by the Boards of Directors of ESS, Merger
Sub and Platform and by the shareholders of Merger Sub and Platform.

Item 7. Financial Statements, Pro Forma Financial Information and Exhibits.

      (a)   Financial Statements of Business Acquired.

            Audited financial statements of Platform have not been included.
Such financial statements will be filed by amendment to this Current Report on
Form 8-K not later than 60 days following the date this Current Report is
required to be filed.

      (b)   Pro Forma Financial Information.

            Pro Forma financial information relative to Platform has not been
included. Such pro forma financial information will be filed by amendment to
this Current Report on Form 8-K not later than 60 days following the date this
Current Report is required to be filed.

      (c)   Exhibits.

            2.1   First Amended and Restated Agreement and Plan of
                  Reorganization dated as of April 27, 1997 among Registrant, EP
                  Acquisition Corporation and Platform Technologies, Inc.

            20.1  ESS Press Release dated April 16, 1997 announcing execution of
                  the Agreement and Plan of Reorganization.

            20.2  ESS Press Release dated April 29, 1997 announcing the
                  conversion of the acquisition of Platform Technologies,
                  Inc. from a pooling-of-interests to a purchase transaction.

            20.3  ESS Press Release dated June 12, 1997 announcing completion
                  of acquisition of Platform Technologies, Inc.



                                      -3-

<PAGE>   4

                                   SIGNATURES

      Pursuant to the requirements of the Securities Exchange Act of 1934, as
amended, the Registrant has duly caused this report to be signed on its behalf
by the undersigned thereunto duly authorized.

                                    ESS Technology, Inc.
                                    (Registrant)


Dated:  June 24, 1997               By:  /s/ JOHN H. BARNET
                                         ---------------------------------------
                                         John H. Barnet
                                         Chief Financial Officer



                                      -4-

<PAGE>   5

                                INDEX TO EXHIBITS

<TABLE>
<CAPTION>
                                                             
Exhibit                                                    
  No.                          Exhibit                       
- -------                        -------                     
<S>             <C>                                         
   2.1          First Amended and Restated Agreement 
                and Plan of Reorganization dated as of 
                April 27, 1997 among Registrant, 
                EP Acquisition Corporation and Platform 
                Technologies, Inc.

   20.1         ESS Press Release dated April 16, 1997 
                announcing execution of the Agreement 
                and Plan of Reorganization.

   20.2         ESS Press Release dated April 29,
                1997 announcing the conversion of the
                acquisition of Platform Technologies,
                Inc. from a pooling-of-interests to a
                purchase transaction.

   20.3         ESS Press Release dated June 12, 1997
                announcing completion of acquisition of
                Platform Technologies, Inc.
</TABLE>



                                      -5-

<PAGE>   1
                                                                     EXHIBIT 2.1


                           FIRST AMENDED AND RESTATED

                      AGREEMENT AND PLAN OF REORGANIZATION

                           DATED AS OF APRIL 27, 1997

                                      AMONG

                              ESS TECHNOLOGY, INC.,

                           EP ACQUISITION CORPORATION

                                       AND

                           PLATFORM TECHNOLOGIES, INC.




<PAGE>   2

                                TABLE OF CONTENTS
<TABLE>
<CAPTION>

                                                                                PAGE
                                                                                ----
<S>                                                                               <C>

ARTICLE I - THE MERGER.............................................................2

   Section 1.1 Effective Time of the Merger........................................2
   Section 1.2 Closing.............................................................2
   Section 1.3 Effects of the Merger...............................................2
   Section 1.4 Directors and Officers..............................................2

ARTICLE II - CONVERSION OF SECURITIES..............................................3

   Section 2.1 Conversion of Capital Stock.........................................3
   Section 2.2 Escrow Agreement....................................................6
   Section 2.3 Dissenting Shares...................................................6
   Section 2.4 Exchange of Certificates............................................7
   Section 2.5 Distributions with Respect to Unexchanged Shares....................8
   Section 2.6 No Fractional Shares................................................8

ARTICLE III - REPRESENTATIONS AND WARRANTIES OF PLATFORM...........................9

   Section 3.1 Organization of Platform............................................9
   Section 3.2 Platform Capital Structure..........................................9
   Section 3.3 Authority; No Conflict; Required Filings and Consents..............11
   Section 3.4 Financial Statements...............................................12
   Section 3.5 Tax Matters........................................................13
   Section 3.6 Absence of Certain Changes or Events...............................15
   Section 3.7 Title and Related Matters..........................................16
   Section 3.8 Proprietary Rights.................................................17
   Section 3.9 Employee Benefit Plans.............................................19
   Section 3.10 Bank Accounts.....................................................21
   Section 3.11 Contracts.........................................................21
   Section 3.12 Orders, Commitments and Returns...................................23
   Section 3.13 Compliance With Law...............................................23
   Section 3.14 Labor Difficulties; No Discrimination.............................23
   Section 3.15 Trade Regulation..................................................24
   Section 3.16 Insider Transactions..............................................24
   Section 3.17 Employees, Independent Contractors and Consultants................25
   Section 3.18 Insurance.........................................................25
   Section 3.19 Litigation........................................................25
   Section 3.20 Governmental Authorizations and Regulations.......................26
   Section 3.21 Section 341(f)(2).................................................26
   Section 3.22 Subsidiaries......................................................26
   Section 3.23 Compliance with Environmental Requirements........................26

</TABLE>



<PAGE>   3

                                TABLE OF CONTENTS

                                   (continued)
<TABLE>
<CAPTION>

                                                                                PAGE
                                                                                ----
<S>                                                                               <C>

   Section 3.24 Corporate Documents...............................................27
   Section 3.25 No Brokers........................................................27
   Section 3.26 Customers and Suppliers...........................................27
   Section 3.27 Platform Action...................................................27
   Section 3.28 Offers............................................................28
   Section 3.29 Information Statement.............................................28
   Section 3.30 Inventory.........................................................28
   Section 3.31 Accounts Receivable...............................................28
   Section 3.32 Disclosure........................................................29

ARTICLE IV - REPRESENTATIONS AND WARRANTIES OF ESS AND SUB........................29

   Section 4.1 Organization of ESS and Sub........................................29
   Section 4.2 ESS Capital Structure..............................................29
   Section 4.3 Authority; No Conflict; Required Filings and Consents..............30
   Section 4.4 Commission Filings; Financial Statements...........................31
   Section 4.5 Absence of Certain Changes or Events...............................31
   Section 4.6 Compliance with Laws...............................................32
   Section 4.7 Interim Operations of Sub..........................................32
   Section 4.8 Disclosure.........................................................32
   Section 4.9 Information Statement..............................................32

ARTICLE V - PRECLOSING COVENANTS OF PLATFORM......................................32

   Section 5.1 Approval of Platform Shareholders..................................32
   Section 5.2 Advice of Changes..................................................33
   Section 5.3 Operation of Business..............................................33
   Section 5.4 Access to Information..............................................35
   Section 5.5 Satisfaction of Conditions Precedent...............................36
   Section 5.6 Other Negotiations.................................................36
   Section 5.7 Shareholder's Agreement............................................36
   Section 5.8 Amendment to Certain Platform Agreements...........................36

ARTICLE VI - PRECLOSING AND OTHER COVENANTS OF ESS AND SUB........................37

   Section 6.1 Advice of Changes..................................................37
   Section 6.2 Reservation of ESS Common Stock....................................37
   Section 6.3 Satisfaction of Conditions Precedent...............................37
   Section 6.4  Nasdaq National Market Listing....................................37
   Section 6.5 Stock Options......................................................37
   Section 6.6 Registration of Shares Issued in the Merger........................39

ARTICLE VII - OTHER AGREEMENTS....................................................39

</TABLE>



                                      -ii-
<PAGE>   4

                                TABLE OF CONTENTS

                                   (continued)
<TABLE>
<CAPTION>

                                                                                PAGE
                                                                                ----
<S>                                                                               <C>

   Section 7.1 Confidentiality....................................................39
   Section 7.2 No Public Announcement.............................................39
   Section 7.3 Regulatory Filings; Consents; Reasonable Efforts...................39
   Section 7.4 Shareholder's Agreements...........................................39
   Section 7.5 Further Assurances.................................................40
   Section 7.6 Escrow Agreement...................................................40
   Section 7.7 FIRPTA.............................................................40
   Section 7.8 Blue Sky Laws......................................................40
   Section 7.9 Information Statement; Other Filings; Board Recommendations........40
   Section 7.9 Tax-Free Reorganization............................................41

ARTICLE VIII - CONDITIONS TO MERGER...............................................41

   Section 8.1 Conditions to Each Party's Obligation to Effect the Merger.........41
   Section 8.2 Additional Conditions to Obligations of ESS and Sub................42
   Section 8.3 Additional Conditions to Obligations of Platform...................44

ARTICLE IX - TERMINATION AND AMENDMENT............................................45

   Section 9.1 Termination........................................................45
   Section 9.2 Effect of Termination..............................................45
   Section 9.3 Fees and Expenses..................................................46

ARTICLE X - ESCROW AND INDEMNIFICATION............................................46

   Section 10.1 Indemnification...................................................46
   Section 10.2 Escrow Fund.......................................................46
   Section 10.3 Damage Threshold..................................................47
   Section 10.4 Escrow Periods....................................................47
   Section 10.5 Claims Upon Escrow Fund...........................................47
   Section 10.6 Valuation.........................................................48
   Section 10.7 Objections to Claims..............................................48
   Section 10.8 Resolution of Conflicts...........................................48
   Section 10.9 Stockholders' Agent...............................................49
   Section 10.10 Actions of the Stockholders' Agent...............................50
   Section 10.11 Claims...........................................................50

ARTICLE XI - MISCELLANEOUS........................................................50

   Section 11.1 Survival of Representations and Covenants.........................50
   Section 11.2 Notices...........................................................51
   Section 11.3 Interpretation....................................................52
   Section 11.4 Counterparts......................................................52

</TABLE>



                                     -iii-
<PAGE>   5

                                TABLE OF CONTENTS

                                   (continued)
<TABLE>
<CAPTION>

                                                                                PAGE
                                                                                ----
<S>                                                                               <C>

   Section 11.5 Entire Agreement; No Third Party Beneficiaries....................53
   Section 11.6 Governing Law.....................................................53
   Section 11.7 Assignment........................................................53

</TABLE>

<TABLE>
<CAPTION>

EXHIBITS
- --------

<S>               <C>
EXHIBIT A         -  SHAREHOLDER'S AGREEMENT
EXHIBIT B         -  ESCROW AGREEMENT
EXHIBIT C         -  FIRPTA NOTICE
EXHIBIT D         -  OPINION OF COUNSEL TO PLATFORM
EXHIBIT E         -  FORM OF EMPLOYMENT AGREEMENT
EXHIBIT F         -  FORM OF NONCOMPETITION AGREEMENT
EXHIBIT G         -  OPINION OF COUNSEL TO ESS
EXHIBIT H         -  DECLARATION OF REGISTRATION RIGHTS

</TABLE>

            The above-referenced exhibits have been omitted. The Registrant
            hereby agrees to furnish supplementally a copy of any such omitted
            exhibit to the Securities and Exchange Commission upon request.



                                      -iv-
<PAGE>   6

                           FIRST AMENDED AND RESTATED


                      AGREEMENT AND PLAN OF REORGANIZATION


         THIS FIRST AMENDED AND RESTATED AGREEMENT AND PLAN OF REORGANIZATION
dated as of April 27, 1997 (this "AGREEMENT"), is entered into by and among ESS
Technology, Inc., a California corporation ("ESS"), EP Acquisition Corporation,
a California corporation and a wholly-owned subsidiary of ESS ("SUB"), and
Platform Technologies, Inc., a California corporation ("PLATFORM"), and amends
and restates that certain Agreement and Plan of Reorganization dated as of April
16, 1997 (the "ORIGINAL AGREEMENT") among ESS, Sub and Platform.

                                    RECITALS:

         WHEREAS, the Boards of Directors of ESS, Sub and Platform deem it
advisable and in the best interests of each corporation and its respective
shareholders of ESS and Platform combine in order to advance the long-term
business interests of ESS and Platform;

         WHEREAS, the combination of ESS and Platform shall be effected by the
terms of this Agreement through a transaction in which Sub will merge with and
into Platform, Platform will become a wholly-owned subsidiary of ESS and the
shareholders of Platform will become shareholders of ESS (the "MERGER");

         WHEREAS, for Federal income tax purposes, it is intended that the
Merger shall qualify as a reorganization within the meaning of Section 368(a) of
the Internal Revenue Code of 1986, as amended (the "CODE");

         WHEREAS, for accounting purposes, it is intended that the Merger shall
be accounted for as a purchase transaction;

         WHEREAS, the parties entered into the Original Agreement to provide for
the Merger, but due to certain changes in the market and other factors and in an
effort to better accomplish the objectives of the parties, the parties have
agreed to amend and restate the Original Agreement to effect certain changes in
the manner in which the Merger is consummated; and

         WHEREAS, concurrently with the execution and delivery of the Original
Agreement and as a condition and inducement to ESS' willingness to enter into
this Agreement, certain Platform shareholders executed and delivered agreements
requiring them to vote in favor of the Merger and concurrently with the
execution of this Agreement such voting agreements are being amended and
restated.

         NOW, THEREFORE, in consideration of the foregoing and the respective
representations, warranties, covenants and agreements set forth below, the
parties agree as follows:



<PAGE>   7

                                    ARTICLE I

                                   THE MERGER

         Section 1.1 Effective Time of the Merger. Subject to the provisions of
this Agreement, an agreement of merger (the "AGREEMENT OF MERGER," in such
mutually acceptable form as is required by the relevant provisions of the
California Corporations Code ("CALIFORNIA LAW") shall be duly executed and
delivered by the parties hereto and thereafter delivered to the Secretary of
State of the State of California for filing on the Closing Date (as defined in
Section 1.2). The Merger shall become effective upon the filing of the Agreement
of Merger with the Secretary of State of the State of California or at such time
thereafter as is provided in the Agreement of Merger (the "EFFECTIVE TIME").

         Section 1.2 Closing. The closing of the Merger (the "CLOSING") will
take place at 10:00 a.m., P.D.T., on a date to be specified by ESS and Platform,
which shall be no later than the second business day after satisfaction or
waiver of the latest to occur of the conditions set forth in Article VIII (other
than the delivery of the officers' certificates referred to therein) (the
"CLOSING DATE"), at the offices of Venture Law Group, A Professional
Corporation, 2800 Sand Hill Road, Menlo Park, California unless another date or
place is agreed to in writing by ESS and Platform.

         Section 1.3 Effects of the Merger.

                  (a) At the Effective Time (i) the separate existence of Sub
shall cease and Sub shall be merged with and into Platform (Sub and Platform are
sometimes referred to below as the "CONSTITUENT CORPORATIONS" and Platform
following consummation of the Merger is sometimes referred to below as the
"SURVIVING CORPORATION"), (ii) the Articles of Incorporation of Sub shall be the
Articles of Incorporation of the Surviving Corporation, provided, however, that
Article I of Sub's Articles of Incorporation shall be amended to read as
follows; "The name of the corporation is "Platform Technologies, Inc." and (iii)
the Bylaws of Sub as in effect immediately prior to the Effective Time shall be
the Bylaws of the Surviving Corporation.

                  (b) At the Effective Time, the effect of the Merger shall be
as provided in the applicable provisions of California Law. Without limiting the
generality of the foregoing, at and after the Effective Time, the Surviving
Corporation shall possess all the rights, privileges, powers and franchises of a
public as well as of a private nature, and be subject to all the restrictions,
disabilities and duties of each of the Constituent Corporations.

         Section 1.4 Directors and Officers. The directors of Sub immediately
prior to the Effective Time shall be the initial directors of the Surviving
Corporation, each to hold office in accordance with the Articles of
Incorporation and Bylaws of the Surviving Corporation, and the officers of Sub
immediately prior to the Effective Time shall be the initial officers of the
Surviving Corporation, in each case until their respective successors are duly
elected or appointed.




                                      -2-
<PAGE>   8

                                   ARTICLE II

                            CONVERSION OF SECURITIES

         Section 2.1 Conversion of Capital Stock. At the Effective Time, by
virtue of the filing of a Certificate of Amendment of (or an additional
restatement of) Platform's Restated Articles of Incorporation and of the Merger
and without any action on the part of the holder of any shares Series A
Preferred Stock, no par value ("SERIES A PREFERRED STOCK"), Series B Preferred
Stock, no par value ("SERIES B PREFERRED STOCK"), and Series C Preferred Stock,
no par value ("SERIES C PREFERRED STOCK") of Platform (the Series A Preferred
Stock, Series B Preferred Stock and Series C Preferred Stock are collectively
referred to as "PLATFORM PREFERRED STOCK") and shares of Common Stock, no par
value ("PLATFORM COMMON STOCK"), and shares of Class B Common Stock, no par
value ("PLATFORM CLASS B COMMON STOCK"), of Platform or capital stock of Sub:

                  (a) Capital Stock of Sub. Each issued and outstanding share of
the capital stock of Sub shall be converted into and become one fully paid and
nonassessable share of Common Stock, no par value, of the Surviving Corporation.

                  (b) Cancellation of ESS-Owned Stock. All shares of Platform
Common Stock, Platform Class B Common Stock or Platform Preferred Stock that are
owned by ESS, Sub or any other direct or indirect wholly-owned Subsidiary (as
defined below) of ESS shall be canceled and retired and shall cease to exist and
no stock of ESS or other consideration shall be delivered in exchange. All
shares of Common Stock, no par value, of ESS ("ESS COMMON STOCK") owned by
Platform shall remain unaffected by the Merger. As used in this Agreement, the
word "SUBSIDIARY" means, with respect to any other party, any corporation or
other organization, whether incorporated or unincorporated, of which (i) such
party or any other Subsidiary of such party is a general partner (excluding
partnerships, the general partnership interests of which held by such party or
any Subsidiary of such party do not have a majority of the voting interest in
such partnership) or (ii) at least a majority of the securities or other
interests having by their terms ordinary voting power to elect a majority of the
Board of Directors or others performing similar functions with respect to such
corporation or other organization or a majority of the profit interests in such
other organization is directly or indirectly owned or controlled by such party
or by any one or more of its Subsidiaries, or by such party and one or more of
its Subsidiaries.

         (c) Exchange Ratio.

             (i) Subject to Sections 2.2 and 2.4 and any adjustment required
pursuant to Article X, (and other than shares to be canceled in accordance with
Section 2.1(b) and any Dissenting Shares as defined in and to the extent
provided in Section 2.3) each issued and outstanding share of Series A Preferred
Stock, Series B Preferred Stock, Series C Preferred Stock, Platform Common Stock
or Platform Class B Common Stock shall be converted into the right to receive a
fraction of a fully paid and nonassessable share of ESS Common Stock equal to
the Series A Exchange Ratio, Series B Exchange Ratio, Series C Exchange Ratio,
Common Exchange Ratio or Class B Common Exchange Ratio, respectively, (as
defined in and determined in accordance with the provisions of this Section
2.1(c)). All such shares of Platform 



                                      -3-
<PAGE>   9

Common Stock, Platform Class B Common Stock or Platform Preferred Stock, when so
converted, shall no longer be outstanding and shall automatically be canceled
and retired and shall cease to exist, and each holder of a certificate
representing any such shares shall cease to have any rights with respect
thereto, except the right to receive the shares of ESS Common Stock and any cash
in lieu of fractional shares of ESS Common Stock to be issued or paid in
consideration therefor upon the surrender of such certificate in accordance with
Section 2.6, without interest.

             (ii) The "SERIES A EXCHANGE RATIO" for exchange of the Series A
Preferred Stock in the Merger shall be determined by dividing 243,465 by the
total number of shares of Series A Preferred Stock outstanding immediately prior
to the Effective Time.

             (iii) The "SERIES B EXCHANGE RATIO" for exchange of the Series B
Preferred Stock in the Merger shall be determined by dividing 379,525 by the
total number of shares of Series B Preferred Stock outstanding immediately prior
to the Effective Time.

             (iv) The "SERIES C EXCHANGE RATIO" for exchange of the Series C
Preferred Stock (including Series C Preferred Stock issued or issuable upon
exercise of the Platform Warrants) shall be determined by dividing 685,076 by
the total number of shares of Series C Preferred Stock outstanding (including
those issued upon exercise of the Platform Warrants) immediately prior to the
Effective Time.

             (v) The "COMMON EXCHANGE RATIO" for exchange of Platform Common
Stock (and for shares of Platform Common Stock issuable upon exercise of
Platform Options and any other options or warrants to purchase shares of
Platform Common Stock (other than the Platform Warrants) and other securities or
rights convertible into or exchangeable for Platform Common Stock (other than
Platform Preferred Stock)) shall be determined by dividing (A) the sum of (x)
300,000 plus (y) the product of the Total Common Conversion Shares (as defined
below) multiplied by the Common Stock Percentage (as defined below), by (B) the
Common Stock Outstanding (as defined below). "TOTAL COMMON CONVERSION SHARES"
means 931,934 (the number of shares of ESS Common Stock issuable in respect of
the outstanding Common Stock, the outstanding Class B Common Stock and upon
exercise of outstanding Platform Options, exclusive of 300,000 shares to be
allocated to the holders of outstanding Common Stock and outstanding Platform
Options exercisable for Common Stock only). The parties anticipate that a total
of 994,513 shares of ESS Common Stock will be issued or issuable to the holders
of outstanding Common Stock and the Platform Options exercisable for Common
Stock.

             (vi) The "CLASS B COMMON EXCHANGE RATIO" for exchange of Platform
Class B Common Stock (and for shares of Platform Class B Common Stock issuable
upon exercise of any Platform Options and any other options or warrants to
purchase shares of Platform Class B Common Stock (other than the Platform
Warrants) and other securities or rights convertible into or exchangeable for
Platform Class B Common Stock (other than Platform Common Stock and Platform
Preferred Stock)) shall be determined by dividing (A) the product of the Total
Common Conversion Shares multiplied by the Class B Common Stock Percentage 



                                      -4-
<PAGE>   10

(as defined below), by (B) the Class B Common Stock Outstanding (as defined
below). The parties anticipate that 237,421 shares of ESS Common Stock will be
issued or issuable to the holders of outstanding Class B Common Stock and
outstanding Platform Options exercisable for Class B Common Stock.

             (vii) If, between the date of this Agreement and the Effective
Time, the outstanding shares of ESS Common Stock shall have been changed into a
different number of shares or a different class by reason of any
reclassification, split-up, stock dividend or stock combination, then the
Exchange Ratio shall be correspondingly adjusted.

             (viii) Notwithstanding the foregoing under no circumstances will
the number of shares of ESS Common Stock issued or issuable to holders of
Platform Common Stock, Platform Class B Common Stock, Platform Preferred Stock,
Platform Warrants, Platform Options and all other securities, rights or
obligations exercisable for, convertible into or exchangeable for Platform
Common Stock or Platform Class B Common Stock or other equity securities of
Platform exceed 2,540,000. If the number of shares of ESS Common Stock issued or
issuable pursuant to Sections 2.1(c) (ii), (iii), (iv), (v) and (vi) would
exceed 2,540,000 then the number of shares so issued or issuable to each holder
shall be appropriately reduced so that the aggregate of such shares of ESS
Common Stock so issued or issuable shall equal 2,540,000 (the "AGGREGATE STOCK
NUMBER").

             (ix) "COMMON STOCK OUTSTANDING" means the sum of (A) the total
number of shares of Platform Common Stock issued and outstanding immediately
prior to the Effective Time plus (B) the total number of shares of Platform
Common Stock issuable upon exercise of Platform Options (as defined in Section
2.1(d)) outstanding immediately prior to the Effective Time, whether vested or
unvested plus (C) the total number of shares of Platform Common Stock issuable
upon exercise of all other options or warrants or upon exercise, exchange or
conversion of all other securities or other rights outstanding immediately prior
to the Effective Time (regardless of whether then exercisable, exchangeable or
convertible). "COMMON STOCK PERCENTAGE" means the quotient equal to the Common
Stock Outstanding divided by the sum of the Common Stock Outstanding plus the
Class B Common Stock Outstanding.

             (x) "CLASS B COMMON STOCK OUTSTANDING" means the sum of (A) the
total number of shares of Platform Class B Common Stock issued and outstanding
immediately prior to the Effective Time plus (B) the total number of shares of
Platform Class B Common Stock issuable upon exercise of Platform Options (as
defined in Section 2.1(d)) outstanding immediately prior to the Effective Time,
whether vested or unvested, plus (C) the total number of shares of Platform
Class B Common Stock issuable upon exercise of all other options or warrants or
upon exercise, exchange or conversion of all other securities or other rights
outstanding immediately prior to the Effective Time (regardless of whether then
exercisable, exchangeable or convertible). "CLASS B COMMON STOCK PERCENTAGE"
means the quotient equal to the Class B Common Stock Outstanding divided by the
sum of the Common Stock Outstanding plus the Class B Common Stock Outstanding.



                                      -5-
<PAGE>   11

         (d) Platform Stock Options. At the Effective Time, all then outstanding
options, whether vested or unvested, ("PLATFORM OPTIONS") to purchase Platform
Common Stock or Platform Class B Common Stock issued under Platform's 1995 Stock
Option Plan (the "PLATFORM OPTION PLAN") will be assumed by ESS in accordance
with Section 6.5.

         Section 2.2 Escrow Agreement. At the Effective Time or such later time
as determined in accordance with Section 2.3(b), ESS will deposit in escrow
certificates representing that number of shares of ESS Common Stock equal to 10%
of the aggregate number of shares of ESS Common Stock to be issued in the Merger
and, upon issuance of any shares of ESS Common Stock upon exercise of Platform
Options, ESS will deposit in escrow certificates representing that number of
shares of ESS Common Stock equal to 10% of such shares so issued upon exercise
of Platform Options (or an aggregate of 254,000 shares of ESS Common Stock
issued and outstanding or issuable upon exercise of Platform Options). Such
shares shall be held in escrow on behalf of the persons who are the holders of
Platform Common Stock or Platform Class B Common Stock (including such Common
Stock issued upon exercise of Platform Options) and Platform Preferred Stock in
the Merger immediately prior to the Effective Time (the "FORMER PLATFORM
SHAREHOLDERS"), on a pro rata basis, in accordance with each such Former
Platform Shareholders' percentage ownership ("PRO RATA PORTION") of the ESS
Common Stock issuable to such Former Platform Shareholders pursuant to the
Merger. Such shares (the "ESCROW SHARES") shall be held as security for the
Former Platform Shareholders' indemnification obligations under Article X and
pursuant to the provisions of an escrow agreement (the "ESCROW AGREEMENT") to be
executed pursuant to Section 7.6. Any shares issued or issuable upon exercise of
Platform Options after expiration of the Escrow and as to which offset or sale
for Damages shall have been required prior to such expiration shall be available
for such cancellation, offset or sale for Damages.

         Section 2.3 Dissenting Shares.

                  (a) Notwithstanding any provision of this Agreement to the
contrary, any shares of Platform Common Stock, Platform Class B Common Stock or
Platform Preferred Stock held by a holder who has exercised such holder's
dissenter's rights in accordance with Chapter 13 of California Law, and who, as
of the Effective Time, has not effectively withdrawn or lost such dissenter's
rights ("DISSENTING SHARES"), shall not be converted into or represent a right
to receive ESS Common Stock pursuant to Section 2.1, but the holder of the
Dissenting Shares shall only be entitled to such rights as are granted by
Chapter 13 of California Law.

                  (b) Notwithstanding the provisions of Section 2.3(a), if any
holder of shares of Platform Common Stock, Platform Class B Common Stock or
Platform Preferred Stock who demands his dissenter's rights with respect to such
shares under Section 2.1 shall effectively withdraw or lose (through failure to
perfect or otherwise) his rights to receive payment for the fair market value of
such shares under California Law, then, as of the later of Effective Time or the
occurrence of such event, such holder's shares shall automatically be converted
into and represent only the right to receive ESS Common Stock and payment for
fractional shares as provided in Section 2.1(c) and 2.6, without interest, upon
surrender of the certificate or certificates representing such shares; provided
that if such holder effectively withdraws or loses 



                                      -6-
<PAGE>   12

his right to receive payment for the fair market value of such shares after the
Effective Time, then, at such time ESS will deposit in escrow certificates
representing such holder's Pro Rata Portion of the Escrow Shares.

                  (c) Platform shall give ESS (i) prompt notice of any written
demands for payment with respect to any shares of capital stock of Platform
pursuant to Chapter 13 of California Law, withdrawals of such demands, and any
other instruments served pursuant to California Law and received by the Platform
and (ii) the opportunity to participate in all negotiations and proceedings with
respect to demands for dissenter's rights under California Law. Platform shall
not, except with the prior written consent of ESS, voluntarily make any payment
with respect to any demands for dissenter's rights with respect to Platform
Common Stock, Platform Class B Common Stock or Platform Preferred Stock or offer
to settle or settle any such demands.

         Section 2.4 Exchange of Certificates.

                  (a) From and after the Effective Time, each holder of an
outstanding certificate or certificates ("CERTIFICATES") which represented
shares of Platform Common Stock, Platform Class B Common Stock or Platform
Preferred Stock immediately prior to the Effective Time shall have the right to
surrender each Certificate to ESS, and receive in exchange therefor a
certificate representing the number of whole shares of ESS Common Stock (other
than the Escrow Shares) into which the Platform Common Stock, Platform Class B
Common Stock or Platform Preferred Stock evidenced by each of the Certificates
so surrendered shall have been converted pursuant to the provisions of Article
II of this Agreement. The surrender of Certificates shall be accompanied by duly
completed and executed Letters of Transmittal in such form as may be mutually
agreed by ESS and Platform. Until surrendered, each outstanding Certificate
which prior to the Effective Time represented shares of Platform Common Stock,
Platform Class B Common Stock or Platform Preferred Stock shall be deemed for
all corporate purposes to evidence ownership of the number of whole shares of
ESS Common Stock into which the shares of Platform Common Stock, Platform Class
B Common Stock or Platform Preferred Stock have been converted but shall,
subject to applicable dissenters rights under California Law and Section 2.3,
have no other rights. Subject to dissenters rights under California Law and
Section 2.3 from and after the Effective Time, the holders of shares of Platform
Common Stock, Platform Class B Common Stock or Platform Preferred Stock shall
cease to have any rights in respect of such shares and their rights shall be
solely in respect of the ESS Common Stock into which such shares of Platform
Common Stock, Platform Class B Common Stock or Platform Preferred Stock have
been converted. From and after the Effective Time, there shall be no further
registration of transfers on the records of Platform of shares of Platform
Common Stock, Platform Class B Common Stock or Platform Preferred Stock
outstanding immediately prior to the Effective Time.

                  (b) If any shares of ESS Common Stock are to be issued in the
name of a person other than the person in whose name the Certificate(s)
surrendered in exchange therefor is registered, it shall be a condition to the
issuance of such shares that (i) the Certificate(s) so surrendered shall be
transferable, and shall be properly assigned, endorsed or accompanied by



                                      -7-
<PAGE>   13

appropriate stock powers, (ii) such transfer shall otherwise be proper and (iii)
the person requesting such transfer shall pay ESS, or its exchange agent, any
transfer or other taxes payable by reason of the foregoing or establish to the
satisfaction of ESS that such taxes have been paid or are not required to be
paid. Notwithstanding the foregoing, neither ESS or Platform shall be liable to
a holder of shares of Platform Common Stock, Platform Class B Common Stock or
Platform Preferred Stock for shares of ESS Common Stock issuable to such holder
pursuant to the provisions of Article II of the Agreement that are delivered to
a public official pursuant to applicable abandoned property, escheat or similar
laws.

                  (c) In the event any Certificate shall have been lost, stolen
or destroyed, upon the making of an affidavit of that fact by the person
claiming such Certificate to be lost, stolen or destroyed, ESS shall issue in
exchange for such lost, stolen or destroyed Certificate the shares of ESS Common
Stock issuable in exchange therefor pursuant to the provisions of Article II of
the Agreement. The Board of Directors of ESS, may in its discretion and as a
condition precedent to the issuance thereof, require the owner of such lost,
stolen or destroyed Certificate to provide to ESS an indemnity agreement against
any claim that may be made against ESS with respect to the Certificate alleged
to have been lost, stolen or destroyed.

         Section 2.5 Distributions with Respect to Unexchanged Shares. No
dividends or other distributions declared or made after the Effective Time with
respect to ESS Common Stock with a record date after the Effective Time shall be
paid to the holder of any unsurrendered Certificate with respect to the shares
of ESS Common Stock represented thereby and no cash payment in lieu of
fractional shares shall be paid to any such holder pursuant to Section 3 below
until the holder of record of such Certificate shall surrender such Certificate.
Subject to the effect of applicable laws, following surrender of any such
Certificate, there shall be paid to the record holder of the certificates
representing whole shares of ESS Common Stock issued in exchange therefor,
without interest, (i) at the time of such surrender, the amount of any cash
payable in lieu of a fractional share of ESS Common Stock to which such holder
is entitled pursuant to Section 3 below and the amount of dividends or other
distributions with a record date after the Effective Time previously paid with
respect to such whole shares of ESS Common Stock, and (ii) at the appropriate
payment date, the amount of dividends or other distributions with a record date
after the Effective Time but prior to surrender and a payment date subsequent to
surrender payable with respect to such whole shares of ESS Common Stock.

         Section 2.6 No Fractional Shares. No certificate or scrip representing
fractional shares of ESS Common Stock shall be issued upon the surrender for
exchange of Certificates, and such fractional share interests will not entitle
the owner thereof to vote or to any rights of a shareholder of ESS.
Notwithstanding any other provision of this Agreement each holder of shares of
Platform Common Stock, Platform Class B Common Stock or Platform Preferred Stock
exchanged pursuant to the Merger who would otherwise have been entitled to
receive a fraction of a share of ESS Common Stock (after taking into account all
Certificates delivered by such holder) shall receive, in lieu thereof, cash
(without interest) in an amount equal to such fractional part of a share of ESS
Common Stock multiplied by the average of the closing sales prices of ESS Common
Stock reported in the Wall Street Journal on the basis of information provided
by 



                                      -8-
<PAGE>   14

the Nasdaq National Market for each of the 6 trading days ending on April 24,
1997 (the "CLOSING STOCK PRICE").

                                   ARTICLE III

                   REPRESENTATIONS AND WARRANTIES OF PLATFORM

         Platform represents and warrants to ESS and Sub that the statements
contained in this Article III are true and correct, except as set forth in the
disclosure schedule delivered by Platform to ESS on or before the date of this
Agreement (the "PLATFORM DISCLOSURE SCHEDULE"). The Platform Disclosure Schedule
shall be arranged in paragraphs corresponding to the numbered and lettered
paragraphs contained in this Article III.

         Section 3.1 Organization of Platform. Platform is a corporation duly
organized, validly existing and in good standing under the laws of the State of
California, has all requisite corporate power to own, lease and operate its
property and to carry on its business as now being conducted and as proposed to
be conducted, and is duly qualified or qualified to do business and is in good
standing as a foreign corporation in each jurisdiction in which the nature of
its business or ownership or leasing of properties makes such qualification or
licensing necessary and where the failure to so qualify would result in a
material adverse effect on the business, assets (including intangible assets),
financial condition or result of operations (a "MATERIAL ADVERSE EFFECT") of
Platform. The Platform Disclosure Schedule contains a true and complete listing
of the locations of all sales offices, manufacturing facilities, and any other
offices or facilities of Platform and a true and complete list of all states in
which Platform maintains any employees. The Platform Disclosure Schedule
contains a true and complete list of all states in which Platform is duly
qualified or licensed to transact business as a foreign corporation.

         Section 3.2 Platform Capital Structure.

                  (a) The authorized capital stock of Platform immediately prior
to the Effective Time shall consist of (I) 5,600,000 shares of Common Stock, no
par value, (II) 5,775,260 shares of Class B Common Stock, no par value, and
(III) 3,812,500 shares of Preferred Stock, no par value, of which 1,000,000
shares are designated as Series A Preferred Stock, 1,312,500 shares are
designated as Series B Preferred Stock and 1,500,000 are designated as Series C
Preferred Stock. Immediately prior to the Effective Time, there will be (i)
500,000 shares of Platform Common Stock issued and outstanding, (ii) 500,260
shares of Class B Common Stock issued and outstanding, (iii) 1,000,000 shares of
Series A Preferred Stock issued and outstanding, 1,312,500 shares of Series B
Preferred Stock issued and outstanding and 1,500,000 shares of Series C
Preferred Stock issued and outstanding (including the Warrant Shares (as defined
below)) (collectively, the "PLATFORM PREFERRED STOCK"), (iv) warrants the
("PLATFORM WARRANTS") to purchase 500,000 shares of Series C Preferred Stock
(the "WARRANT SHARES"), will have been fully exercised for Series C Preferred
Stock prior to the Effective Time and will constitute part of such 1,500,000
issued and outstanding shares of Series C Preferred Stock referenced with
preceding clause (iii); (v) 2,543,000 shares of Platform Common Stock and
540,000 shares of Platform Class B Common Stock, reserved for future issuance
pursuant to Platform Options granted and outstanding under the Platform Option
Plan; and (vi) 1,692,000 shares of Platform 




                                      -9-
<PAGE>   15

Common Stock reserved for issuance upon exercise of options available to be
granted in the future under the Platform Option Plan. As of the Effective Time
of this Agreement, the issued and outstanding shares of Platform Common Stock,
Platform Class B Common Stock and each series of Platform Preferred Stock are
held of record by the shareholders of Platform as set forth and identified in
the Platform Disclosure Schedule. As of the date of this Agreement, the issued
and outstanding Platform Options are held of record by the option holders as set
forth and identified in the option holder list provided to ESS or its
representatives, which list will be updated as of the Effective Time. The issued
and outstanding Platform Warrants are held of record by the warrantholders as
set forth and identified in the warrantholder list provided to ESS or its
representatives. Immediately prior to the Effective Time, all outstanding shares
of Platform Common Stock, Platform Class B Common Stock and Platform Preferred
Stock will be validly issued, fully paid and nonassessable. All shares of
Platform Common Stock and Platform Preferred Stock subject to issuance as
specified above upon issuance on the terms and conditions specified in the
instruments pursuant to which they are issuable, shall be duly authorized,
validly issued, fully paid and nonassessable. All outstanding shares of Platform
Common Stock, Platform Class B Common Stock, Platform Preferred Stock and
outstanding Platform Options and Platform Warrants (collectively "PLATFORM
SECURITIES") were issued in compliance with applicable federal and state
securities laws. Except as set forth in the Platform Disclosure Schedule, there
are no obligations, contingent or otherwise, of Platform to repurchase, redeem
or otherwise acquire any shares of Platform Common Stock, Platform Class B
Common Stock or Platform Preferred Stock or make any Investment (in the form of
a loan, capital contribution or otherwise) in any other entity.

                  (b) Except as set forth in this Section 3.2, there are no
equity securities of any class or series of Platform, or any security
exchangeable into or exercisable for such equity securities, issued, reserved
for issuance or outstanding. Except as contemplated in Section 3.2(a) above,
there are no options, warrants, equity securities, calls, rights, commitments or
agreements of any character to which Platform is a party or by which it is bound
obligating Platform to issue, deliver or sell, or cause to be issued, delivered
or sold, additional shares of capital stock of Platform or obligating Platform
to grant, extend, accelerate the vesting of or enter into any such option,
warrant, equity security, call, right, commitment or agreement. Except as
provided in this Agreement or any transaction contemplated thereby to the best
knowledge of Platform, there are no voting trusts, proxies or other agreements
or understandings with respect to the voting of the shares of capital stock of
Platform.

                  (c) All Platform Options have been issued in accordance with
the terms of the Platform Option Plan and pursuant to the standard forms of
option agreement previously provided to legal counsel for ESS. No option will by
its terms require an adjustment in connection with the Merger. Neither the
consummation of transactions contemplated by this Agreement or the other
Transaction Documents (as defined in Section 3.3(a)) nor any action taken by
Platform in connection with such transactions will result in (i) any
acceleration of vesting in favor of any optionee under any Platform Option; (ii)
any additional benefits for any optionee under any Platform Option; or (iii) the
inability of ESS after the Effective Date to exercise any right or benefit held
by Platform prior to the Effective Date with respect to any Platform Option
assumed by ESS, including, without limitation, the right to repurchase an



                                      -10-
<PAGE>   16

optionee's unvested shares on termination of such optionee's employment. The
assumption by ESS of Platform Options in accordance with Section 6.5 hereunder
will not (i) give the optionees additional benefits which they did not have
under their options prior to such assumption (after taking into account the
existing provisions of the options, such as their respective exercise prices and
vesting schedules) and (ii) constitute a breach of the Platform Plan or any
agreement entered into pursuant to such plan.

         Section 3.3 Authority; No Conflict; Required Filings and Consents.

                  (a) Platform has all requisite corporate power and authority
to enter into this Agreement and all Transaction Documents (as defined in this
Section 3.3(a)) to which it is or will become a party and to consummate the
transactions contemplated by this Agreement and such Transaction Documents. The
execution and delivery of this Agreement and such Transaction Documents and the
consummation of the transactions contemplated by this Agreement and such
Transaction Documents have been duly authorized by all necessary corporate
action on the part of Platform, subject only to the approval of the Merger by
Platform's shareholders under the provisions of California Law and Platform's
Articles of Incorporation. This Agreement has been and such Transaction
Documents have been or will be duly executed and delivered by Platform. This
Agreement and each of the Transaction Documents to which Platform is a party
constitutes, and each of the Transaction Documents to which Platform will become
a party when executed and delivered by Platform will constitute, the valid and
binding obligation of Platform, enforceable in accordance with their respective
terms. For purposes of this Agreement, "TRANSACTION DOCUMENTS" means all
documents or agreements required to be delivered by any party under this
Agreement including the Agreement of Merger, the Escrow Agreement the
Shareholders Agreements, the Employment Agreements, the Noncompetition
Agreements, Declaration of Registration Rights and the Voting Agreement.

                  (b) The execution and delivery by Platform of this Agreement
and the Transaction Documents to which it is or will become a party does not and
the consummation of the transactions contemplated by this Agreement and the
Transaction Documents to which it is or will become a party will not, (i)
conflict with, or result in any violation or breach of any provision of the
Articles of Incorporation or Bylaws of Platform, (ii) result in any violation or
breach of, or constitute (with or without notice or lapse of time, or both) a
default (or give rise to a right of termination, cancellation or acceleration of
any obligation or loss of any benefit) under any of the terms, conditions or
provisions of any note, bond, mortgage, indenture, lease, contract or other
agreement, instrument or obligation to which Platform is a party or by which it
or any of its properties or assets may be bound, or (iii) conflict with or
violate any permit, concession, franchise, license, judgment, order, decree,
statute, law, ordinance, rule or regulation applicable to Platform or any of its
properties or assets, except in the case of (ii) and (iii) for any such
conflicts, violations, defaults, terminations, cancellations or accelerations
which would not have a Material Adverse Effect on Platform.

                  (c) No consent, approval, order or authorization of, or
registration, declaration or filing with, any court, administrative agency or
commission or other governmental authority or instrumentality ("GOVERNMENTAL
ENTITY") is required by or with respect to Platform in 



                                      -11-
<PAGE>   17

connection with the execution and delivery of this Agreement or of any other
Transaction Document to which it is or will become a party or the consummation
of the transactions contemplated by this Agreement or such Transaction Document
or the continuation of the business activities of Platform following
consummation of the Merger without a Material Adverse Change (as defined in
Section 3.6(a)), except for (i) the filing of the Agreement of Merger with the
California Secretary of State, (ii) such consents, approvals, orders,
authorizations, registrations, declarations and filings as may be required under
applicable federal and state securities laws and the laws of any foreign country
and (iii) such other consents, authorizations, filings, approvals and
registrations which, if not obtained or made, would not be reasonably likely to
have a Material Adverse Effect on Platform.

         Section 3.4 Financial Statements.

                  (a) Platform has delivered to ESS copies of Platform's
unaudited balance sheet as of February 28, 1997 (the "MOST RECENT BALANCE
SHEET") and statements of operations, shareholders' equity and cash flow for the
8-month period then-ended (the "PLATFORM UNAUDITED FINANCIALS") and the
unaudited balance sheets as of June 30, 1995 and 1996 and the related statements
of operations, shareholders' equity and cash flows for the period from September
29, 1995 to June 30, 1995 and the fiscal year ended June 30, 1996, respectively
(collectively, the "PLATFORM FINANCIAL STATEMENTS").

                  (b) The Platform Financial Statements are complete and in
accordance with the books and records of Platform and present fairly in all
material respects the financial position, results of operations and cash flows
of Platform as of their historical dates and for the periods indicated. The
Platform Financial Statements have been prepared in accordance with sound
accounting principles applied on a basis consistent with prior periods. Except
and to the extent reflected or reserved against in the balance sheets included
in the Platform Financial Statements (including the notes thereto), Platform did
not have, as of the dates of such balance sheets, any liabilities or obligations
(absolute or contingent) of a nature required to be reflected in a balance sheet
(or the notes thereto) prepared in accordance with sound accounting principles
applied on a basis consistent with prior periods. The reserves, if any,
reflected on the Platform Financial Statements are adequate in light of the
contingencies with respect to which they are made.

                  (c) Platform has no debt, liability, or obligation of any
nature, whether accrued, absolute, contingent, or otherwise, and whether due or
to become due, that is not reflected or reserved against in the Most Recent
Balance Sheet, except for those that may have been incurred after the date of
the Most Recent Balance Sheet or that would not reasonably be required, in
accordance with sound accounting principles applied on a basis consistent with
prior periods, to be included in a balance sheet or the notes thereto, and
except that Platform has not established any reserves with respect to the costs
and fees associated with this Agreement and the transactions contemplated
hereby. Except as noted in the previous sentence, all debts, liabilities, and
obligations incurred after the date of the Most Recent Balance Sheet were
incurred in the ordinary course of business, and are usual and normal in amount
and not material both individually and in the aggregate.



                                      -12-
<PAGE>   18

         Section 3.5 Tax Matters.

                  (a) For purposes of this Section 3.5 and other provisions of
this Agreement relating to Taxes, the following definitions shall apply:

                      (i) The term "TAXES" shall mean all taxes, however
denominated, including any interest, penalties or other additions to tax that
may become payable in respect thereof, (A) imposed by any federal, territorial,
state, local or foreign government or any agency or political subdivision of any
such government, which taxes shall include, without limiting the generality of
the foregoing, all income or profits taxes (including but not limited to,
federal income taxes and state income taxes), payroll and employee withholding
taxes, unemployment insurance, social security taxes, sales and use taxes, ad
valorem taxes, excise taxes, franchise taxes, gross receipts taxes, business
license taxes, occupation taxes, real and personal property taxes, stamp taxes,
environmental taxes, ozone depleting chemicals taxes, transfer taxes, workers'
compensation, Pension Benefit Guaranty Corporation premiums and other
governmental charges, and other obligations of the same or of a similar nature
to any of the foregoing, which are required to be paid, withheld or collected,
(B) any liability for the payment of amounts referred to in (A) as a result of
being a member of any affiliated, consolidated, combined or unitary group, or
(C) any liability for amounts referred to in (A) or (B) as a result of any
obligations to indemnify another person.

                      (ii) The term "RETURNS" shall mean all reports, estimates,
declarations of estimated tax, information statements and returns relating to,
or required to be filed in connection with, any Taxes, including information
returns or reports with respect to backup withholding and other payments to
third parties.

                  (b) All Returns required to be filed by or on behalf of
Platform have been duly filed on a timely basis and such Returns are true,
complete and correct. All Taxes shown to be payable on such Returns or on
subsequent assessments with respect thereto, and all payments of estimated Taxes
required to be made by or on behalf of Platform under Section 6655 of the Code
or comparable provisions of state, local or foreign law, have been paid in full
on a timely basis or have been accrued on the Financial Statements, and no other
Taxes are payable by Platform with respect to items or periods covered by such
Returns (whether or not shown on or reportable on such Returns) or with respect
to any period prior to the date of this Agreement. Platform has withheld and
paid over all Taxes required to have been withheld and paid over, and complied
with all information reporting and backup withholding requirements, including
maintenance of required records with respect thereto, in connection with amounts
paid or owing to any employee, creditor, independent contractor, or other third
party. There are no liens on any of the assets of Platform with respect to
Taxes, other than liens for Taxes not yet due and payable or for Taxes that
Platform is contesting in good faith through appropriate proceedings and for
which appropriate reserves have been established on the Platform Financial
Statements. Platform has not at any time been (i) a member of an affiliated
group of corporations filing consolidated, combined or unitary income or
franchise tax returns, or (ii) a member of any partnership or joint venture for
a period for which the statue of limitations for any Tax potentially applicable
as a result of such membership has not expired.



                                      -13-
<PAGE>   19

                  (c) The amount of Platform's liability for unpaid Taxes
(whether actual or contingent) for all periods through the date of the Most
Recent Balance Sheet does not, in the aggregate, exceed the amount of the
current liability accruals for Taxes reflected on the Financial Statements, and
the Financial Statements reflect proper accrual in accordance with sound
accounting principles applied on a basis consistent with prior periods of all
liabilities for Taxes payable after the date of the Most Recent Balance Sheet
attributable to transactions and events occurring prior to such date. No
liability for Taxes has been incurred (or prior to Closing will be incurred)
since such date other than in the ordinary course of business.

                  (d) ESS has been furnished by Platform with true and complete
copies of (i) relevant portions of income tax audit reports, statements of
deficiencies, closing or other agreements received by or on behalf of Platform
relating to Taxes, and (ii) all federal and state income or franchise tax
returns and state sales and use tax Returns for or including Platform for all
periods since the inception of Platform. Platform does not do business in or
derive income from any state other than states for which Returns have been duly
filed and furnished to ESS.

                  (e) The Returns of or including Platform have never been
audited by a government or taxing authority, nor is any such audit in process,
threatened or, to Platform's knowledge, pending (either in writing or verbally,
formally or informally). No deficiencies exist or have been asserted (either in
writing or verbally, formally or informally), and Platform has not received
notice (either in writing or verbally, formally or informally) that it has not
filed a Return or paid Taxes required to be filed or paid. Platform is neither a
party to any action or proceeding for assessment or collection of Taxes, nor has
such event been asserted or threatened (either in writing or verbally, formally
or informally) against Platform or any of its assets. No waiver or extension of
any statute of limitations is in effect with respect to Taxes or Returns of
Platform. Platform has disclosed on its federal and state income and franchise
tax returns all positions taken therein that could give rise to a substantial
understatement penalty within the meaning of Code Section 6662 or comparable
provisions of applicable state tax laws.

                  (f) Platform is not (nor has it ever been) a party to any tax
sharing agreement.

                  (g) Platform is not, nor has it been, a United States real
property holding corporation within the meaning of Section 897(c)(2) of the Code
during the applicable period specified in Section 897(c)(1)(A)(ii) of the Code,
and ESS is not required to withhold tax by reason of Section 1445 of the Code.
Platform is not a "consenting corporation" under Section 341(f) of the Code.
Platform has not entered into any compensatory agreements with respect to the
performance of services which payment thereunder would result in a nondeductible
expense to Platform pursuant to Section 280G of the Code or an excise tax to the
recipient of such payment pursuant to Section 4999 of the Code. Platform has not
agreed to, nor is it required to make any adjustment under Code Section 481(a)
by reason of, a change in accounting method. Platform is not, nor has it been, a
"reporting corporation" subject to the information reporting and record
maintenance requirements of Section 6038A and the regulations thereunder.
Platform is in compliance with the terms and conditions of any applicable tax
exemptions, agreements or orders of any foreign government to which it may be
subject or which it may have claimed, and 



                                      -14-
<PAGE>   20

the transactions contemplated by this Agreement will not have any adverse effect
on such compliance.

                  (h) The Platform Disclosure Schedule sets forth accurate and
complete information regarding Platform's net operating losses for federal and
each applicable state tax purposes. Platform has no net operating losses and
credit carryovers or other tax attributes currently subject to limitation under
Sections 382, 383, or 384 of the Code.

         Section 3.6 Absence of Certain Changes or Events. Since February 28,
1997 and as permitted by this Agreement, Platform has not:

                  (a) suffered any material adverse change in its business,
assets (including intangible assets, financial condition (including, but not
limited to cash distributions or material decreases in its net assets) or
results of operations or business ("MATERIAL ADVERSE CHANGE").

                  (b) suffered any damage, destruction or loss, whether covered
by insurance or not, that has resulted in a Material Adverse Effect on Platform;

                  (c) granted or agreed to make any increase in the compensation
payable or to become payable by Platform to its officers or employees, except
those occurring in the ordinary course of business;

                  (d) declared, set aside or paid any dividend or made any other
distribution on or in respect of the shares of the capital stock of Platform or
declared any direct or indirect redemption, retirement, purchase or other
acquisition by Platform of such shares, other than repurchases of unvested
shares at the original purchase price thereof from employees or consultants upon
termination of such employment or consulting relationship;

                  (e) issued any shares of capital stock of Platform or any
warrants, rights, options or entered into any commitment relating to the shares
of Platform except for the issuance of shares of Platform capital stock pursuant
to the exercise of Platform Options and Platform Warrants;

                  (f) made any change in the accounting methods or practices it
follows, whether for general financial or tax purposes, or any change in
depreciation or amortization policies or rates adopted therein;

                  (g) sold, leased, abandoned or otherwise disposed of any real
property or any machinery, equipment or other operating property other than in
the ordinary course of business;

                  (h) sold, assigned, transferred, licensed or otherwise
disposed of any patent, trademark, trade name, brand name, copyright (or pending
application for any patent, trademark or copyright) invention, work of
authorship, process, know-how, formula or trade secret or interest thereunder or
other intangible asset except in the ordinary course of its business;



                                      -15-
<PAGE>   21

                  (i) permitted or allowed any of its property or assets to be
subjected to any mortgage, deed of trust, pledge, lien, security interest or
other encumbrance of any kind (except those permitted under Section 3.7), other
than any purchase money security interests incurred in the ordinary course of
business;

                  (j) made any capital expenditure or commitment individually in
excess of $35,000 or in the aggregate in excess of $100,000;

                  (k) paid, loaned or advanced any amount to, or sold,
transferred or leased any properties or assets to, or entered into any agreement
or arrangement with any of its Affiliates (as defined in Section 3.16),
officers, directors or shareholders or any affiliate or associate of any of the
foregoing;

                  (l) made any amendment to or terminated any agreement which,
if not so amended or terminated, would be required to be disclosed on the
Platform Disclosure Schedule; or

                  (m) agreed to take any action described in this Section 3.6 or
outside of its ordinary course of business or which would constitute a breach of
any of the representations contained in this Agreement.

         Section 3.7 Title and Related Matters. Platform has good and marketable
title to all the properties, interests in properties and assets, real and
personal, reflected in the Most Recent Balance Sheet or acquired after the date
of the Most Recent Balance Sheet (except properties, interests in properties and
assets sold or otherwise disposed of since the date of the Most Recent Balance
Sheet in the ordinary course of business), free and clear of all mortgages,
liens, pledges, charges or encumbrances of any kind or character, except the
lien of current taxes not yet due and payable and except for liens which in the
aggregate do not secure more than $35,000 in liabilities. The equipment of
Platform used in the operation of its business is, taken as a whole, in the
reasonable opinion of Platform (i) adequate for the conduct of the business
conducted by Platform and (ii) in good operating condition and repair, ordinary
wear and tear excepted. To the best knowledge of Platform, all real or personal
property leases to which Platform is a party are valid, binding, enforceable and
effective in accordance with their respective terms. To the best knowledge of
Platform, there is not under any of such leases any existing default or event of
default or event which, with notice or lapse of time or both, would constitute a
default. The Platform Disclosure Schedule contains a description of all personal
property with an individual value in excess of $10,000 or categories of such
property (which may be described based upon such categories) in excess of
$35,000, or real property leased or owned by Platform, describing its interest
in said property. True and correct copies of Platform's material leases have
been provided to ESS or its representatives.

         Section 3.8 Proprietary Rights.

                  (a) Platform owns all right, title and interest in and to, or
otherwise possesses legally enforceable rights, or, to Platform's knowledge, is
licensed to use, all patents, copyrights, technology, software, software tools,
know-how, processes, trade secrets, trademarks, service 



                                      -16-
<PAGE>   22

marks, trade names and other proprietary rights used in or necessary for the
conduct of Platform's business as conducted to the date of this Agreement, the
absence of which would have a Material Adverse Effect on Platform, including,
without limitation, the technology and all proprietary rights developed or
discovered or used in connection with or contained in all versions and
implementation, of any product which has been or is being marketed by Platform
or currently is under development by Platform (the "PLATFORM PRODUCTS"), free
and clear of all liens, claims and encumbrances (including without limitation
distribution rights) (all of which are referred to as "PLATFORM PROPRIETARY
Rights"); provided that no representation is made as to the infringement by any
Platform Proprietary Right on the patent, trade name, trademark or service mark
rights of any third party or parties. The Platform Disclosure Schedule contains
an accurate and complete (i) description of all patents, trademarks (with
separate listings of registered and unregistered trademarks), trade names, and
registered copyrights in or related to the Platform Products or otherwise
included in the Platform Proprietary Rights and all applications and
registration statements therefor, including the jurisdictions in which each such
Platform Proprietary Right has been issued or registered or in which any such
application of such issuance and registration has been filed, and (ii) list of
all licenses and other agreements with third parties (the "THIRD PARTY
LICENSES") relating to any material patents, copyrights, trade secrets,
software, inventions, technology, know-how, processes or other proprietary
rights that Platform is licensed or otherwise authorized by such third parties
to use, market, distribute or incorporate in Platform Products (such patents,
copyrights, trade secrets, software, inventions, technology, know-how, processes
or other proprietary rights are collectively referred to as the "THIRD PARTY
TECHNOLOGY"). All of Platform's patents, copyrights, trademark or trade name
registrations related to or in the Platform Products are valid and in full force
and effect; and consummation of the transactions contemplated by this Agreement
will not alter or impair any such rights. No claims have been asserted against
Platform (and Platform is not aware of any claims which are likely to be
asserted against Platform or which have been asserted against others relating to
Platform Proprietary Rights or Platform Products) by any person challenging
Platform's use, possession, manufacture, sale or distribution of Platform
Products under any Platform Proprietary Rights (including, without limitation,
the Third Party Technology) or challenging or questioning the validity or
effectiveness of any material license or agreement relating thereto (including,
without limitation, the Third Party Licenses). To Platform's knowledge, there is
no valid basis for any claim of the type specified in the immediately preceding
sentence which could in any material way relate to or interfere with the
continued enhancement and exploitation by Platform of any of the Platform
Products. To Platform's knowledge, none of the Platform Products nor the use or
exploitation of any Platform Proprietary Rights in its current business
infringes on the rights of or constitutes misappropriation of any proprietary
information or intangible property right of any third person or entity,
including without limitation any patent, trade secret, copyright, trademark or
trade name and Platform has not been sued in any suit, action or proceeding
which involves a claim of such infringement, misappropriation or unfair
competition.

                  (b) Platform has not knowingly granted any third party any
right to manufacture, reproduce, distribute, market or exploit any of the
Platform Products or any adaptations, translations, or derivative works based on
the Platform Products or any portion thereof. Except with respect to the rights
of third parties to the Third Party Technology, no third 



                                      -17-
<PAGE>   23

party has any express right to manufacture, reproduce, distribute, market or
exploit any works or materials of which any of the Platform Products are a
"derivative work" as that term is defined in the United States Copyright Act,
Title 17, U.S.C. Section 101.

                  (c) All material designs, drawings, specifications, source
code, object code, documentation, flow charts and diagrams incorporating,
embodying or reflecting any of the Platform Products at any stage of their
development (the "PLATFORM COMPONENTS") were written, developed and created
solely and exclusively by employees of Platform without the assistance of any
third party or entity or were created by third parties who assigned ownership of
their rights to Platform by means of valid and enforceable consultant
confidentiality and invention assignment agreements, copies of which have been
delivered to ESS. Platform has at all times used commercially reasonable efforts
customary in its industry to treat the Platform Proprietary Rights related to
Platform Products and Platform Components as containing trade secrets and has
not disclosed or otherwise dealt with such items in such a manner as intended or
reasonably likely to cause the loss of such trade secrets by release into the
public domain.

                  (d) To Platform's knowledge, no employee of Platform is in
violation in any material respect of any term of any written employment
contract, patent disclosure agreement or any other written contract or agreement
relating to the relationship of any such employee with Platform or, to
Platform's knowledge, any other party because of the nature of the business
conducted by Platform or proposed to be conducted by Platform.

                  (e) Each person presently or previously employed by Platform
(including independent contractors, if any) with access authorized by Platform
to confidential information has executed a confidentiality and non-disclosure
agreement pursuant to the form of agreement previously provided to ESS or its
representatives. Such confidentiality and non-disclosure agreements constitute
valid and binding obligations of Platform and such person, enforceable in
accordance with their respective terms.

                  (f) To Platform's knowledge, no product liability or warranty
claims which individually or in the aggregate could exceed the reserves therefor
on the Most Recent Balance Sheet have been communicated in writing to or
threatened against Platform.

                  (g) To Platform's knowledge, there is no material unauthorized
use, disclosure, infringement or misappropriation of any Platform Proprietary
Rights, or any Third Party Technology to the extent licensed by or through
Platform, by any third party, including any employee or former employee of
Platform. Platform has not entered into any agreement to indemnify any other
person against any charge of infringement of any Platform Proprietary Rights,
other than indemnification provisions contained in purchase orders arising in
the ordinary course of business.

                  (h) Platform has taken all steps customary and reasonable in
the industry to protect and preserve the confidentiality of all Intellectual
Property not otherwise protected by patents, patent applications or copyright
("CONFIDENTIAL INFORMATION"). All use, disclosure or appropriation of
Confidential Information owned by Platform by or to a third party has been
pursuant to the terms of a written agreement between Platform and such third
party. All use, 



                                      -18-
<PAGE>   24

disclosure or appropriation of Confidential Information not owned by Platform
has been pursuant to the terms of a written agreement between Platform and the
owner of such Confidential Information, or is otherwise lawful.

         Section 3.9 Employee Benefit Plans.

                  (a) The Platform Disclosure Schedule lists, with respect to
Platform and any trade or business (whether or not incorporated) which is
treated as a single employer with Platform (an "ERISA AFFILIATE") within the
meaning of Section 414(b), (c), (m) or (o) of the Code, (i) all material
employee benefit plans (as defined in Section 3(3) of the Employee Retirement
Income Security Act of 1974, as amended ("ERISA"), (ii) each loan to a
non-officer employee in excess of $10,000, loans to officers and directors and
any stock option, stock purchase, phantom stock, stock appreciation right,
supplemental retirement, severance, sabbatical, medical, dental, vision care,
disability, employee relocation, cafeteria benefit (Code section 125) or
dependent care (Code Section 129), life insurance or accident insurance plans,
programs or arrangements, (iii) all bonus, pension, profit sharing, savings,
deferred compensation or incentive plans, programs or arrangements, (iv) other
fringe or employee benefit plans, programs or arrangements that apply to senior
management of Platform and that do not generally apply to all employees, and (v)
any current or former employment or executive compensation or severance
agreements, written or otherwise, as to which unsatisfied obligations of
Platform of greater than $10,000 remain for the benefit of, or relating to, any
present or former employee, consultant or director of Platform as to which (with
respect to any of items (i) through (v) above) any potential liability is borne
by Platform (together, the "PLATFORM EMPLOYEE PLANS").

                  (b) Platform has made available to ESS a copy of each of the
Platform Employee Plans and related plan documents (including trust documents,
insurance policies or contracts, employee booklets, summary plan descriptions
and other authorizing documents, and, to the extent still in its possession, any
material employee communications relating thereto) and has, with respect to each
Platform Employee Plan which is subject to ERISA reporting requirements,
provided copies of any Form 5500 reports filed for the last three plan years.
Any Platform Employee Plan intended to be qualified under Section 401(a) of the
Code has either obtained from the Internal Revenue Service a favorable
determination letter as to its qualified status under the Code, including all
amendments to the Code effected by the Tax Reform Act of 1986 and subsequent
legislation, or has applied to the Internal Revenue Service for such a
determination letter prior to the expiration of the requisite period under
applicable Treasury Regulations or Internal Revenue Service pronouncements in
which to apply for such determination letter and to make any amendments
necessary to obtain a favorable determination. Platform has also furnished ESS
with the most recent Internal Revenue Service determination letter issued with
respect to each such Platform Employee Plan, and nothing has occurred since the
issuance of each such letter which could reasonably be expected to cause the
loss of the tax-qualified status of any Platform Employee Plan subject to Code
Section 401(a).

                  (c) (i) None of the Platform Employee Plans promises or
provides retiree medical or other retiree welfare benefits to any person; (ii)
there has been no "prohibited transaction," as such term is defined in Section
406 of ERISA and Section 4975 of the Code, 



                                      -19-
<PAGE>   25

with respect to any Platform Employee Plan, which could reasonably be expected
to have, in the aggregate, a Material Adverse Effect; (iii) each Platform
Employee Plan has been administered in accordance with its terms and in
compliance with the requirements prescribed by any and all statutes, rules and
regulations (including ERISA and the Code), except as would not have, in the
aggregate, a Material Adverse Effect, and Platform and each subsidiary or ERISA
Affiliate have performed all material obligations required to be performed by
them under, are not in any material respect in default, under or violation of,
and have no knowledge of any material default or violation by any other party
to, any of the Platform Employee Plans; (iv) neither Platform nor any subsidiary
or ERISA Affiliate is subject to any material liability or penalty under
Sections 4976 through 4980 of the Code or Title I of ERISA with respect to any
of the Platform Employee Plans; (v) all material contributions required to be
made by Platform or any subsidiary or ERISA Affiliate to any Platform Employee
Plan have been made on or before their due dates and a reasonable amount has
been accrued for contributions to each Platform Employee Plan for the current
plan years; (vi) with respect to each Platform Employee Plan, no "reportable
event" within the meaning of Section 4043 of ERISA (excluding any such event for
which the thirty (30) day notice requirement has been waived under the
regulations to Section 4043 of ERISA) nor any event described in Section 4062,
4063 or 4041 or ERISA has occurred; and (vii) no Platform Employee Plan is
covered by, and neither Platform nor any subsidiary or ERISA Affiliate has
incurred or expects to incur any liability under Title IV of ERISA or Section
412 of the Code. With respect to each Platform Employee Plan subject to ERISA as
either an employee pension plan within the meaning of Section 3(2) of ERISA or
an employee welfare benefit plan within the meaning of Section 3(1) of ERISA,
Platform has prepared in good faith and timely filed all requisite governmental
reports (which were true and correct as of the date filed) and has properly and
timely filed and distributed or posted all notices and reports to employees
required to be filed, distributed or posted with respect to each such Platform
Employee Plan except as would not give rise, in the aggregate, to a Material
Adverse Effect on Platform. No suit, administrative proceeding, action or other
litigation has been brought, or to the best knowledge of Platform is threatened,
against or with respect to any such Platform Employee Plan, including any audit
or inquiry by the IRS or United States Department of Labor. Neither Platform or
other ERISA Affiliate is a party to, or has made any contribution to or
otherwise incurred any obligation under, any "multi-employer plan" as defined in
Section 3(37) of ERISA.

                  (d) With respect to each Platform Employee Plan, Platform and
each of its United States subsidiaries have complied with (i) the applicable
health care continuation and notice provisions of the Consolidated Omnibus
Budget Reconciliation Act of 1985 ("COBRA") and the proposed regulations
thereunder and (ii) the applicable requirements of the Family Leave Act of 1993
and the regulations thereunder, except to the extent that such failure to comply
would not, in the aggregate, have a Material Adverse Effect on Platform.

                  (e) The consummation of the transactions contemplated by this
Agreement will not (i) entitle any current or former employee or other service
provider of Platform or any other ERISA Affiliate to severance benefits or any
other payment (including, without limitation, unemployment compensation, golden
parachute or bonus), except as expressly provided in this Agreement, or (ii)
accelerate the time of payment or vesting of any such benefits, or (iii)
increase any benefits or the amount of compensation due any such employee or
service provider.



                                      -20-
<PAGE>   26

                  (f) There has been no amendment to, written interpretation or
announcement (whether or not written) by Platform or other ERISA Affiliate
relating to, or change in participation or coverage under, any Platform Employee
Plan which would materially increase the expense of maintaining such Plan above
the level of expense incurred with respect to that Plan for the most recent
fiscal year included in Platform's financial statements.

         Section 3.10 Bank Accounts. The Platform Disclosure Schedule sets forth
the names and locations of all banks, trusts, companies, savings and loan
associations, and other financial institutions at which Platform maintains
accounts of any nature and the names of all persons authorized to draw thereon
or make withdrawals therefrom.

         Section 3.11 Contracts.

                  (a) Except as set forth on the Platform Disclosure Schedule:

                      (i) Platform has no agreements, contracts or commitments
that provide for the sale, licensing or distribution by Platform of any Platform
Products or Platform Proprietary Rights in the ordinary course of its business.
Without limiting the foregoing, Platform has not granted to any third party
(including, without limitation, OEMs and site license customers) any rights to
reproduce or manufacture any of the Platform Products, nor has Platform granted
to any third party any exclusive rights of any kind with respect to any of the
Platform Products, including, without limitation, territorial exclusivity or
exclusivity with respect to particular versions, implementations or translations
of any of the Platform Products, nor has Platform granted any third party any
right to market any of the Platform Products under any private label or "OEM"
arrangements pursuant to which Platform is not identified as the source of such
goods.

                      (ii) Platform has no Third Party Licenses.

                      (iii) Platform has no agreements, contracts or commitments
that call for fixed and/or contingent payments or expenditures by or to Platform
of more than $35,000.

                      (iv) Platform has no purchase agreement, contract or
commitment that calls for fixed and/or contingent payments by Platform that are
in excess of $35,000.

                      (v) Platform has no outstanding sales contract, commitment
or proposal (including, without limitation, porting and development projects)
that Platform currently expects to result in any loss to Platform (before
allocation of overhead and administrative costs) upon completion or performance
thereof except for evaluation and promotional units subject to evaluation
agreements (including confidentiality restrictions) customary and reasonable in
the industry.

                      (vi) Platform has no outstanding agreements, contracts or
commitments with officers, employees, agents, consultants, advisors, salesmen,
sales representatives, distributors or dealers that are not cancelable by it on
notice of not longer than ninety (90) days and without liability, penalty or
premium.



                                      -21-
<PAGE>   27

                      (vii) Platform has no employment, independent contractor
or similar agreement, contract or commitment that is not terminable on no more
than ninety (90) days' notice without penalty or liability of any type,
including without limitation severance or termination pay.

                      (viii) Platform has no currently effective collective
bargaining or union agreements, contracts or commitments.

                      (ix) Platform is not restricted by agreement from
competing with any person or from carrying on its business anywhere in the
world.

                      (x) Platform is under no liability or obligation, and no
such outstanding claim has been made, with respect to the return to Platform of
inventory or merchandise in the possession of wholesalers, distributors,
retailers, or other customers, except such liabilities, obligations and claims
as, in the aggregate, do not exceed $35,000, and which have been adequately
accrued for in the Platform Financial Statements.

                      (xi) Platform has not guaranteed any obligations of other
persons or made any agreements to acquire or guarantee any obligations of other
persons.

                      (xii) Platform has no outstanding loan or advance to any
person; nor is it party to any line of credit, standby financing, revolving
credit or other similar financing arrangement of any sort which would permit the
borrowing by Platform of any sum not reflected in the Most Recent Balance Sheet
other than amounts owed to employees for advances made on behalf of Platform.

                      (xiii) Platform has no agreements pursuant to which
Platform has agreed to manufacture for or supply to any third party any Platform
Products or Platform Components.

         True and correct copies of each document or instrument listed on the
Platform Disclosure Schedule pursuant to this Section 3.11(a) (the "MATERIAL
CONTRACTS") have been provided to ESS or its representatives.

                  (b) All of the Material Contracts listed on the Platform
Disclosure Schedule are valid, binding, in full force and effect, and
enforceable by Platform in accordance with their respective terms. No Material
Contract contains any material liquidated damages, penalty or similar provision.
To the knowledge of Platform, no party to any such Material Contract intends to
cancel, withdraw, modify or amend such contract, agreement or arrangement.

                  (c) Platform is not in default under or in breach or violation
of, nor, to Platform's knowledge, is there any valid basis for any claim of
default by Platform under, or breach or violation by Platform of, any Material
Contract which default could adversely affect Platform's ability to derive the
benefits provided under that Material Contract. To Platform's knowledge, no
other party is in default under or in breach or violation of, nor is there any
valid basis for any claim of default by any other party under or any breach or
violation by any other party of, any Material Contract.



                                      -22-
<PAGE>   28

         Section 3.12 Orders, Commitments and Returns. All accepted and unfilled
orders entered into by Platform for the sale, license, or lease or other
disposition by Platform of Platform Products, and all material agreements,
contracts, or commitments for the purchase of supplies by Platform, were made in
the ordinary course of business. To the best knowledge of Platform, no
outstanding purchase or outstanding lease commitment of Platform is in excess of
the normal, ordinary and usual requirements of its business or was made at any
price (on both a per unit and aggregate basis) materially in excess of the
current market price at the time made, or contains terms and conditions
materially more onerous to Platform than those usual and customary in the
industry.

         Section 3.13 Compliance With Law. Platform is in compliance with all
applicable laws and regulations where the failure to comply with such laws and
regulations would have a Material Adverse Effect on Platform. Neither Platform
nor, to Platform's knowledge, any of its employees has directly or indirectly
paid or delivered any fee, commission or other sum of money or item of property,
however characterized, to any finder, agent, government official or other party
in the United States or any other country, that was or is in violation of any
federal, state, or local statute or law or of any statute or law of any other
country having jurisdiction. Platform has not participated directly or
indirectly in any boycotts or other similar practices affecting any of its
customers. Platform has complied at all times with any and all applicable
federal, state and foreign laws, rules, regulations, proclamations and orders
relating to the importation or exportation of its products.

         Section 3.14 Labor Difficulties; No Discrimination.

                  (a) Platform is not engaged in any unfair labor practice and
is not in material violation of any applicable laws respecting employment and
employment practices, terms and conditions of employment, and wages and hours.
There is no unfair labor practice complaint against Platform actually pending
or, to the knowledge of Platform, threatened before the National Labor Relations
Board. There is no strike, labor dispute, slowdown, or stoppage actually pending
or, to the knowledge of Platform, threatened against Platform. To the best
knowledge of Platform, no union organizing activities are taking place. No
grievance that might have a Material Adverse Effect on Platform or the conduct
of its business, nor any arbitration proceeding arising out of or under any
collective bargaining agreement is pending and, to the knowledge of Platform, no
claims therefor exist. No collective bargaining agreement that is binding on
Platform restricts it from relocating or closing any of its operations. Platform
has not experienced any material work stoppage or other material labor
difficulty.

                  (b) There is and has not been any claim against Platform and
received by Platform, or to Platform's knowledge, threatened against Platform,
based on actual or alleged race, age, sex, disability or other harassment or
discrimination, or similar tortuous conduct, nor to the knowledge of Platform,
is there any basis for any such claim.

                  (c) There are no pending claims against Platform or any of its
subsidiaries under any workers compensation plan or policy or for long term
disability. Neither Platform nor any of its subsidiaries has any material
obligations under COBRA with respect to any former 



                                      -23-
<PAGE>   29

employees or qualifying beneficiaries thereunder. There are no proceedings
pending or, to the knowledge of Platform, threatened, between Platform and any
of their respective employees, which proceedings have or could reasonably be
expected to have a Material Adverse Effect on Platform.

         Section 3.15 Trade Regulation. Platform has not terminated its
relationship with or refused to ship Platform Products to any dealer,
distributor, OEM, third party marketing entity or customer which had theretofore
paid or been obligated to pay Platform in excess of $35,000 over any consecutive
twelve (12) month period. All of the prices charged by Platform in connection
with the marketing or sale of any products or services have been in compliance
with all applicable laws and regulations. No claims have been communicated or
threatened in writing against Platform with respect to wrongful termination of
any dealer, distributor or any other marketing entity, discriminatory pricing,
price fixing, unfair competition, false advertising, or any other violation of
any laws or regulations relating to anti-competitive practices or unfair trade
practices of any kind, and to Platform's knowledge, no specific situation, set
of facts, or occurrence provides any basis for any such claim.

         Section 3.16 Insider Transactions. To the best knowledge of Platform,
no affiliate ("AFFILIATE") as defined in Rule 12b-2 under the Securities
Exchange Act of 1934, as amended (the "EXCHANGE ACT") of Platform has any
interest in any equipment or other property, real or personal, tangible or
intangible, including, without limitation, any Platform Proprietary Rights or
any creditor, supplier, customer, manufacturer, agent, representative, or
distributor of Platform Products; provided, however, that no such Affiliate or
other person shall be deemed to have such an interest solely by virtue of the
ownership of less than 1% of the outstanding stock or debt securities of any
publicly-held company, the stock or debt securities of which are traded on a
recognized stock exchange or quoted on the National Association of Securities
Dealers Automated Quotation System.

         Section 3.17 Employees, Independent Contractors and Consultants. The
Platform Disclosure Schedule lists and describes all currently effective written
or, to Platform's knowledge, oral consulting, independent contractor and/or
employment agreements and other material agreements concluded with individual
employees, independent contractors or consultants to which Platform is a party.
True and correct copies of all such written agreements have been provided to ESS
or its representatives. All independent contractors have been properly
classified as independent contractors for the purposes of federal and applicable
state tax laws, laws applicable to employee benefits and other applicable law
except as would not give rise, in the aggregate, to a Material Adverse Effect on
Platform. All salaries and wages paid by Platform are in compliance in all
material respects with applicable federal, state and local laws. Also shown on
the Platform Disclosure Schedule are the names and positions of all persons
whose annual rate of compensation, including bonuses and other payments of any
kind, is in excess of $50,000.

         Section 3.18 Insurance. The Platform Disclosure Schedule contains a
list of the principal policies of fire, liability and other forms of insurance
held by Platform. To the best knowledge of Platform, Platform has not done
anything, either by way of action or inaction, that 



                                      -24-
<PAGE>   30

might invalidate such policies in whole or in part. There is no material claim
pending under any of such policies or bonds as to which coverage has been
questioned, denied or disputed by the underwriters of such policies or bonds.
All premiums due and payable under all such policies and bonds have been paid
and Platform is otherwise in compliance with the terms of such policies and
bonds in all material respects. Platform has no knowledge of any threatened
termination of, or material premium increase with respect to, any of such
policies.

         Section 3.19 Litigation. There is no private or governmental action,
suit, proceeding, claim, arbitration or investigation pending before any agency,
court or tribunal, foreign or domestic, or, to the knowledge of Platform or any
of its subsidiaries, threatened against Platform or any of its properties or any
of its officers or directors (in their capacities as such) that, individually or
in the aggregate, could reasonably be expected to have a Material Adverse Effect
on Platform. There is no judgment, decree or order against Platform, or, to the
knowledge of Platform, any of its respective directors or officers (in their
capacities as such), that could prevent, enjoin, or materially alter or delay
any of the transactions contemplated by this Agreement, or that could reasonably
be expected to have a Material Adverse Effect on Platform. All litigation to
which Platform is a party (or, to the knowledge of Platform, threatened to
become a party) is disclosed in the Platform Disclosure Schedule.
Notwithstanding anything in this Agreement to the contrary, no disclosure of any
action, suit, proceeding, claim, arbitration or investigation, whether active or
threatened, arising out of or relating to any claims or assertions made in a
letter dated April 14, 1997 from Daniel J. Bergeron to Platform (the
"NOTIFICATION LETTER"), shall have the effect of relieving Platform from its
obligations to indemnify ESS with respect to the effects of any such action,
suit, proceeding, claim, arbitration or investigation pursuant to Article X
hereof.

         Section 3.20 Governmental Authorizations and Regulations. Platform has
obtained each federal, state, county, local or foreign governmental consent,
license, permit, grant, or other authorization of a Governmental Entity (i)
pursuant to which Platform currently operates or holds any interest in any of
its properties or (ii) that is required for the operation of Platform's business
or the holding of any such interest, and all of such authorizations are in full
force and effect, except where the failure to obtain or have any such Platform
authorizations could not reasonably be expected to have a Material Adverse
Effect on Platform. The business of Platform is not being conducted in violation
of any law, ordinance or regulation of any governmental entity, except for
violations which either singly or in the aggregate do not and will not have a
Material Adverse Effect on Platform.

         Section 3.21 Section 341(f)(2). Platform has not, with regard to any
property or assets held, acquired or to be acquired by it, at any time, filed a
consent to the application of Section 341(f)(2) of the Code nor will any such
consent be filed before the Closing.

         Section 3.22 Subsidiaries. Platform has no Subsidiaries. Platform does
not own or control (directly or indirectly) any capital stock, bonds or other
securities of, and does not have any proprietary interest in, any other
corporation, general or limited partnership, firm, association or business
organization, entity or enterprise, and Platform does not control (directly or



                                      -25-
<PAGE>   31

indirectly) the management or policies of any other corporation, partnership,
firm, association or business organization, entity or enterprise.

         Section 3.23 Compliance with Environmental Requirements. To the best
knowledge of Platform, Platform has obtained all permits, licenses and other
authorizations which are required under federal, state and local laws applicable
to Platform and relating to pollution or protection of the environment,
including laws or provisions relating to emissions, discharges, releases or
threatened releases of pollutants, contaminants, or hazardous or toxic
materials, substances, or wastes into air, surface water, groundwater, or land,
or otherwise relating to the manufacture, processing, distribution, use,
treatment, storage, disposal, transport, or handling of pollutants, contaminants
or hazardous or toxic materials, substances, or wastes or which are intended to
assure the safety of employees, workers or other persons except where the
failure to obtain the same would not have a Material Adverse Effect on Platform.
Platform is in compliance with all terms and conditions of all such permits,
licenses and authorizations except where such noncompliance would not have a
Material Adverse Effect on Platform. Platform is not aware of, nor has Platform
received written notice of, any conditions, circumstances, activities,
practices, incidents, or actions which may form the basis of any claim, action,
suit, proceeding, hearing, or investigation of, by, against or relating to
Platform, based on or related to the manufacture, processing, distribution, use,
treatment, storage, disposal, transport, or handling, or the emission,
discharge, release or threatened release into the environment, of any pollutant,
contaminant, or hazardous or toxic substance, material or waste, or relating to
the safety of employees, workers or other persons.

         Section 3.24 Corporate Documents. Platform has furnished or made
available to ESS or its representative for its examination; (a) copies of its
Articles of Incorporation and Bylaws, as amended to date; (b) its minute book
containing all records required to be set forth of all proceedings, consents,
actions, and meetings of the shareholders, the board of directors and any
committees thereof; (c) all material permits, orders, and consents issued by any
regulatory agency with respect to Platform, or any securities of Platform, and
all applications for such permits, orders, and consents; and (d) the stock
transfer books of Platform setting forth all transfers of any capital stock. The
corporate minute books, stock certificate books, stock registers and other
corporate records of Platform are complete and accurate, and the signatures
appearing on all documents contained therein are the true signatures of the
persons purporting to have signed the same. All actions reflected in such books
and records were duly and validly taken in compliance with the laws of the
applicable jurisdiction.

         Section 3.25 No Brokers. Neither Platform nor, to Platform's knowledge,
any Platform shareholder is obligated for the payment of fees or expenses of any
broker or finder in connection with the origin, negotiation or execution of this
Agreement or the other Transaction Documents or in connection with any
transaction contemplated hereby or thereby.

         Section 3.26 Customers and Suppliers. As of the date hereof, no
customer which individually accounted for more than 1% of Platform's gross
revenues during the 12 month period preceding the date hereof, and no supplier
of Platform, has canceled or otherwise terminated, or made any written threat to
Platform to cancel or otherwise terminate its 



                                      -26-
<PAGE>   32

relationship with Platform, or has at any time on or after December 31, 1996
decreased materially its services or supplies to Platform in the case of any
such supplier, or its usage of the services or products of Platform in the case
of such customer, and to Platform's knowledge, no such supplier or customer
intends to cancel or otherwise terminate its relationship with Platform or to
decrease materially its services or supplies to Platform or its usage of the
services or products of Platform, as the case may be. From and after the date
hereof, no customer which individually accounted for more than 5% of Platform's
gross revenues during the 12 month period preceding the Closing Date, has
canceled or otherwise terminated, or made any written threat to Platform to
cancel or otherwise terminate, for any reason, including without limitation the
consummation of the transactions contemplated hereby, its relationship with
Platform, and to Platform's knowledge, no such customer intends to cancel or
otherwise terminate its relationship with Platform or to decrease materially its
usage of the services or products of Platform. Platform has not knowingly
breached, so as to provide a benefit to Platform that was not intended by the
parties, any agreement with, or engaged in any fraudulent conduct with respect
to, any customer or supplier or Platform.

         Section 3.27 Platform Action. The Board of Directors of Platform, by
unanimous written consent or at a meeting duly called and held, has by the
unanimous vote of all directors (i) determined that the Merger is fair and in
the best interests of Platform and its shareholders, (ii) approved the Merger
and this Agreement in accordance with the provisions of California Law, and
(iii) directed that this Agreement and the Merger be submitted to Platform
shareholders for their approval and resolved to recommend that Platform
shareholders vote in favor of the approval of this Agreement and the Merger.

         Section 3.28 Offers. Platform has suspended or terminated, and has the
legal right to terminate or suspend, all negotiations and discussions of
Acquisition Transactions (as defined in Section 5.6) with parties other than
ESS.

         Section 3.29 Information Statement. The information to be supplied by
Platform for inclusion in the information statement to be sent to the
shareholders of Platform in connection with the meeting of Platform shareholders
to consider the Merger (the "PLATFORM SHAREHOLDERS MEETING") or in connection
with any written consent of shareholders of Platform (such information statement
as amended or supplemented is referred to herein as the "INFORMATION STATEMENT")
shall not, on the date the Information Statement is first mailed to Platform
shareholders, at the time of the Platform Shareholders Meeting, or written
consent of shareholders and at the Effective Time, contain any statement which,
at such time, is false or misleading with respect to any material fact, or omit
to state any material fact necessary in order to make the statements made
therein, in light of the circumstances under which they are made, not false or
misleading; or omit to state any material fact necessary to correct any
statement in any earlier communication with respect to the solicitation of
proxies for the Platform Shareholders Meeting which has become false or
misleading. If at any time prior to the Effective Time any event of information
should be discovered by Platform which should be set forth in an amendment to
the Information Statement or a supplement to the Proxy Statement, Platform shall
promptly inform ESS and Sub. Notwithstanding the foregoing, Platform makes no



                                      -27-
<PAGE>   33

representation, warranty or covenant with respect to any information supplied by
ESS or Sub which is contained in any of the foregoing documents.

         Section 3.30 Inventory. The inventories shown on the Platform Financial
Statements or thereafter acquired by Platform, consisted of items of a quantity
and quality usable or salable in the ordinary course of business. Since December
31, 1996, Platform has continued to replenish inventories in a normal and
customary manner consistent with past practices. Platform has not received
written or oral notice that it will experience in the foreseeable future any
difficulty in obtaining, in the desired quantity and quality and at a reasonable
price and upon reasonable terms and conditions, the raw materials, supplies or
component products required for the manufacture, assembly or production of its
products. The values at which inventories are carried reflect the inventory
valuation policy of Platform, which is consistent with its past practice and in
accordance with generally accepted accounting principles applied on a consistent
basis. Since December 31, 1996, due provision was made on the books of Platform
in the ordinary course of business consistent with past practices to provide for
all slow-moving, obsolete, or unusable inventories to their estimated useful
scrap values and such inventory reserves are adequate to provide for such
slow-moving, obsolete or unusable inventory and inventory shrinkage.

         Section 3.31 Accounts Receivable. Subject to any reserves set forth in
the Financial Statements, the accounts receivable shown on the Financial
Statements represent and will represent bona fide claims against debtors for
sales and other charges, and are not subject to discount except for normal cash
and immaterial trade discounts. The amount carried for doubtful accounts and
allowances disclosed in the Financial Statements is sufficient to provide for
any losses which may be sustained on realization of the receivables.

         Section 3.32 Disclosure. No statements by Platform contained in this
Agreement, its exhibits and schedules nor in any of the certificates or
documents, including any of the Transaction Documents, delivered or required to
be delivered by Platform to ESS or Sub under this Agreement contains any untrue
statement of a material fact or omits to state a material fact necessary in
order to make the statements contained herein or therein not misleading in light
of the circumstances under which they were made. Platform has disclosed to ESS
all material information of which it is aware relating specifically to the
operations and business of Platform as of the date of this Agreement or the
transactions contemplated by this Agreement.

                                   ARTICLE IV

                  REPRESENTATIONS AND WARRANTIES OF ESS AND SUB

         ESS and Sub represent and warrant to Platform that, except as disclosed
in a filing with the Commission or a document of even date herewith and
delivered by ESS to Platform prior to the execution and delivery of this
Agreement the statements contained in this Article IV are true and correct.

         Section 4.1 Organization of ESS and Sub. Each of ESS and its
Subsidiaries, including Sub, is a corporation duly organized, validly existing
and in good standing under the laws of the 




                                      -28-
<PAGE>   34

State of California and has all requisite corporate power to own, lease and
operate its property and to carry on its business as now being conducted and as
proposed to be conducted.

         Section 4.2 ESS Capital Structure. The authorized capital stock of ESS
consists of 100,000,000 shares of Common Stock, no par value, and 10,000,000
shares of Preferred Stock, no par value, of which there were issued and
outstanding as of the close of business on January 31, 1997, 38,307,036 shares
of Common Stock and no shares of Preferred Stock. There are no other outstanding
shares of capital stock or voting securities of ESS other than shares of ESS
Common Stock issued after December 31, 1996 under the ESS 1995 Employee Stock
Purchase Plan or upon the exercise of options issued under the ESS 1995 Equity
Incentive Plan and the ESS 1995 Director Stock Option Plan. The authorized
capital stock of Sub consists of 1,000 shares of Common Stock all of which are
issued and outstanding and are held by ESS. All outstanding shares of ESS and
Sub have been duly authorized, validly issued, fully paid and are nonassessable
and free of any liens or encumbrances other than any liens or encumbrances
created by or imposed upon the holders thereof. As of the close of business on
December 31, 1996, ESS has reserved an aggregate of 7,150,000 shares of Common
Stock for issuance to employees, directors and independent contractors pursuant
to its stock option and stock purchase plans. Other than this Agreement, and
except as described in this Section 4.2, there are no other options, warrants,
calls, rights, commitments or agreements of any character to which ESS or Sub is
a party or by which either of them is bound obligating ESS or Sub to issue,
deliver, sell, repurchase or redeem, or cause to be issued, delivered, sold,
repurchased or redeemed, any shares of the capital stock of ESS or Sub or
obligating ESS or Sub to grant, extend or enter into any such option, warrant,
call, right, commitment or agreement. The shares of ESS Common Stock to be
issued pursuant to the Merger will be duly authorized, validly issued, fully
paid, and non-assessable and issued in compliance with all applicable federal or
state securities laws.

         Section 4.3 Authority; No Conflict; Required Filings and Consents.

                  (a) Each of ESS and Sub has all requisite corporate power and
authority to enter into this Agreement and the other Transaction Documents to
which it is or will become a party and to consummate the transactions
contemplated by this Agreement and such Transaction Documents. The execution and
delivery of this Agreement and such Transaction Documents and the consummation
of the transactions contemplated by this Agreement and such Transaction
Documents have been duly authorized by all necessary corporate action on the
part of ESS and Sub. This Agreement has been and such Transaction Documents have
been or will be duly executed and delivered by ESS and Sub. This Agreement and
each of the Transaction Documents to which ESS or Sub is a party constitutes,
and each of the Transaction Documents to which ESS or Sub will become a party
when executed and delivered by ESS or Sub will constitute, the valid and binding
obligation of ESS or Sub, enforceable in accordance with its terms.

                  (b) The execution and delivery by ESS or Sub of this Agreement
and the Transaction Documents to which it is a party does not and the execution
and delivery of the Transaction Documents to which it will become a party and
consummation of the transactions contemplated by this Agreement or the
Transaction Documents to which it is or will become a 



                                      -29-
<PAGE>   35

party will not, (i) conflict with, or result in any violation or breach of any
provision of the Articles of Incorporation or Bylaws of ESS or Sub, (ii) result
in any violation or breach of, or constitute (with or without notice or lapse of
time, or both) a default (or give rise to a right of termination, cancellation
or acceleration of any obligation or loss of any material benefit) under any of
the terms, conditions or provisions of any note, bond, mortgage, indenture,
lease, contract or other agreement, instrument or obligation to which ESS or Sub
is a party or by which either of them or any of their properties or assets may
be bound, or (iii) conflict or violate any permit, concession, franchise,
license, judgment, order, decree, statute, law, ordinance, rule or regulation
applicable to ESS or Sub or any of their properties or assets, except in the
case of (ii) and (iii) for any such conflicts, violations, defaults,
terminations, cancellations or accelerations which would not be reasonably
likely to have a Material Adverse Effect on ESS and its Subsidiaries, taken as a
whole.

                  (c) No consent, approval, order or authorization of, or
registration, declaration or filing with, any Governmental Entity is required by
or with respect to ESS or Sub in connection with the execution and delivery of
this Agreement or the Transaction Documents to which it is or will become a
party or the consummation of the transactions contemplated hereby or thereby,
except for (i) the filing of the Agreement of Merger with the California
Secretary of State, (ii) such consents, approvals, orders, authorizations,
registrations, declarations and filings as may be required under applicable
federal and state securities laws and the laws of any foreign country, and (iii)
such other consents, authorizations, filings, approvals and registrations which,
if not obtained or made, would not be reasonably likely to have a Material
Adverse Effect on ESS and its Subsidiaries, taken as a whole.

         Section 4.4 Commission Filings; Financial Statements.

                  (a) ESS has filed with the Commission and made available to
Platform all forms, reports and documents required to be filed by ESS with the
Commission since December 31, 1996 other than registration statements on Form
S-8 (collectively, the "ESS COMMISSION REPORTS"). The ESS Commission Reports (i)
at the time filed, complied in all material respects with the applicable
requirements of the Securities Act and the Exchange Act, as the case may be, and
(ii) did not at the time they were filed (or if amended or superseded by a
filing prior to the date of this Agreement, then on the date of such filing)
contain any untrue statement of a material fact or omit to state a material fact
required to be stated in such ESS Commission Reports or necessary in order to
make the statements in such ESS Commission Reports, in the light of the
circumstances under which they were made, not misleading. ESS has also delivered
to Platform a press release dated April 17, 1997 and has made an oral
presentation to Platform on April 16, 1997 concerning certain financial matters
relating to the Company.

                  (b) Each of the consolidated financial statements (including,
in each case, any related notes) contained in the ESS Commission Reports,
including any ESS Commission Reports filed after the date of this Agreement
until the Closing, complied or will comply as to form in all material respects
with the applicable published rules and regulations of the Commission with
respect thereto, was prepared in accordance with generally accepted accounting
principles applied on a consistent basis throughout the periods involved (except
as 



                                      -30-
<PAGE>   36

may be indicated in the notes to such financial statements or, in the case of
unaudited statements, as permitted by Form 10-Q of the Commission) and fairly
presented the consolidated financial position of ESS and its Subsidiaries as at
the respective dates and the consolidated results of its operations and cash
flows for the periods indicated, except that the unaudited interim financial
statements were or are subject to normal and recurring year-end adjustments
which were not or are not expected to be material in amount.

         Section 4.5 Absence of Certain Changes or Events. Since December 31,
1996, ESS and its Subsidiaries have conducted their business only in the
ordinary course and, since such date, there has not been (i) any Material
Adverse Change of ESS and any of its Subsidiaries, taken as a whole; or (ii) any
damage, destruction or loss (whether or not covered by insurance) with respect
to ESS or any of its Subsidiaries having a Material Adverse Effect on ESS and
its Subsidiaries, taken as a whole.

         Section 4.6 Compliance with Laws. ESS has complied with, is not in
violation of, and has not received any notices of violation with respect to, any
federal, state or local statute, law or regulation with respect to the conduct
of its business, or the ownership or operation of its business, except for
failures to comply or violations which would not be reasonably likely to have a
Material Adverse Effect on ESS and its Subsidiaries, taken as a whole.

         Section 4.7 Interim Operations of Sub. Sub was formed solely for the
purpose of engaging in the transactions contemplated by this Agreement, has
engaged in no other business activities and has conducted its operations only as
contemplated by this Agreement.

         Section 4.8 Disclosure. No statements by ESS contained in this
Agreement, its exhibits and schedules, nor any of the certificates or documents,
including any of the Transaction Documents, required to be delivered by ESS or
Sub to Platform under this Agreement contains any untrue statement of material
fact or omits to state a material fact necessary in order to make the statements
contained herein or therein not misleading in light of the circumstances under
which they were made.

         Section 4.9 Information Statement. The information to be supplied by
ESS and for inclusion in the Information Statement shall not, on the date the
Information Statement is first mailed to Platform shareholders, at the time of
the Platform Shareholders Meeting (or written consent of Platform shareholders)
and at the Effective Time, contain any statement which, at such time, is false
or misleading with respect to any material fact, or omit to state any material
fact necessary in order to make the statements therein, in light of the
circumstances under which it is made, not false or misleading; or omit to state
any material fact necessary to correct any statement in any earlier
communication with respect to the solicitation of proxies for the Platform
Shareholders Meeting (or written consent of Platform shareholders) which has
become false or misleading. If at any time prior to the Effective Time any event
or information should be discovered by ESS or Sub which should be set forth in
an amendment to the Information Statement or a supplement to the Information
Statement, ESS or Sub will promptly inform Platform. Notwithstanding the
foregoing ESS and Sub make no representation, warranty or 




                                      -31-
<PAGE>   37

covenant with respect to any information supplied by Platform which is contained
in any of the foregoing documents.

                                    ARTICLE V

                        PRECLOSING COVENANTS OF PLATFORM

         Section 5.1 Approval of Platform Shareholders. Prior to the Closing
Date and at the earliest practicable date, Platform will solicit written
consents from its shareholders for, or hold the Platform Shareholders' Meeting
for the purpose of seeking approval of this Agreement, the Merger and related
matters. If Platform holds the Platform Shareholders' Meeting, the Board of
Directors will solicit proxies from Platform's shareholders to vote such
shareholders' shares at the Platform Shareholders' Meeting. In soliciting such
written consent or proxies, the Board of Directors of Platform will recommend to
the shareholders of Platform that they approve this Agreement and the Merger and
shall use its best efforts to obtain the approval of the shareholders of
Platform entitled to vote on or consent to this Agreement and the Merger in
accordance with California Law and Platform's Articles of Incorporation.
Platform will prepare as soon as reasonably practicable the Information
Statement and if it holds the Platform Shareholders Meeting, a proxy statement,
reasonably acceptable to ESS, with respect to the solicitation of written
consents and/or proxies from the shareholders of Platform to approve this
Agreement, the Merger and related matters.

         Section 5.2 Advice of Changes. Platform will promptly advise ESS in
writing of any event occurring subsequent to the date of this Agreement which
would render any representation or warranty of Platform contained in this
Agreement, if made on or as of the date of such event or the Closing Date,
untrue or inaccurate in any material and adverse respect and of any Material
Adverse Change with respect to Platform.

         Section 5.3 Operation of Business. During the period from the date of
this Agreement and continuing until the earlier of the termination of the
Agreement or the Effective Time, Platform agrees (except to the extent that ESS
shall otherwise consent in writing), to carry on its business in the usual,
regular and ordinary course in substantially the same manner as previously
conducted, to pay its debts and taxes when due, subject to good faith disputes
over such debts or taxes, to pay or perform other obligations when due, and, to
the extent consistent with such business, use all reasonable efforts consistent
with past practices and policies to preserve intact its present business
organization, keep available the services of its present officers and key
employees and preserve its relationships with customers, suppliers,
distributors, licensors, licensees, and others having business dealings with it,
to the end that its goodwill and ongoing businesses shall be unimpaired at the
Effective Time. Platform shall promptly notify ESS of any event or occurrence
not in the ordinary course of business of Platform. Except as expressly
contemplated by this Agreement, Platform shall not, without the prior written
consent of ESS:

                  (a) Accelerate, amend or change the period of exercisability
or the vesting schedule of options or restricted stock granted under any
employee stock plan or agreements or authorize cash payments in exchange for any
Platform Option or any options granted under any of such plans except as
specifically required by the terms of such plans or any related agreements 



                                      -32-
<PAGE>   38

or any such agreements in effect as of the date of this Agreement and disclosed
in the Platform Disclosure Schedule;

                  (b) Declare or pay any dividends on or make any other
distributions (whether in cash, stock or property) in respect of any of its
capital stock, or split, combine or reclassify any of its capital stock or issue
or authorize the issuance of any other securities in respect of, in lieu of or
in substitution for shares of capital stock of such party, or purchase or
otherwise acquire, directly or indirectly, any shares of its capital stock
except from former employees, directors and consultants in accordance with
agreements providing for the repurchase of shares in connection with any
termination of service by such party;

                  (c) Issue, deliver or sell or authorize or propose the
issuance, delivery or sale of, or purchase or propose the purchase of, any
shares of its capital stock or securities convertible into shares of its capital
stock, or subscriptions, rights, warrants or options to acquire, or other
agreements or commitments of any character obligating it to issue any such
shares or other convertible securities, other than (i) the issuance of (A)
shares of Platform Common Stock, Platform Class B Common Stock or Platform
Series C Preferred Stock issuable upon exercise of Platform Options or Platform
Warrants, which are outstanding on the date of this Agreement or (B) shares of
Platform Class B Common Stock issuable upon conversion of shares of Platform
Common Stock, or (ii) the repurchase of shares of Platform Common Stock from
terminated employees pursuant to the terms of outstanding stock restriction or
similar agreements or the issuance of up to 175,260 shares of Platform Class B
Common Stock;

                  (d) Acquire or agree to acquire by merging or consolidating
with, or by purchasing a substantial equity interest in or substantial portion
of the assets of, or by any other manner, any business or any corporation,
partnership or other business organization or division, or otherwise acquire or
agree to acquire any assets;

                  (e) Sell, lease, license or otherwise dispose of any of its
properties or assets which are material, individually or in the aggregate, to
the business of Platform, except in the ordinary course of business;

                  (f) (i) Increase or agree to increase the compensation payable
or to become payable to its officers or employees, except for increases in
salary or wages of employees in accordance with past practices, (ii) grant any
additional severance or termination pay to, or enter into any employment or
severance agreements with, officers, (iii) grant any severance or termination
pay to, or enter into any employment or severance agreement, with any employee,
except in accordance with past practices, (iv) enter into any collective
bargaining agreement, or (v) establish, adopt, enter into or amend in any
material respect any bonus, profit sharing, thrift, compensation, stock option,
restricted stock, pension, retirement, deferred compensation, employment,
termination, severance or other plan, trust, fund, policy or arrangement for the
benefit of any directors, officers or employees;

                  (g) Revalue any of its assets, including writing down the
value of inventory or writing off notes or accounts receivable other than in the
ordinary course of business;



                                      -33-
<PAGE>   39

                  (h) Incur any indebtedness for borrowed money or guarantee any
such indebtedness or issue or sell any debt securities or warrants or rights to
acquire any debt securities or guarantee any debt securities of others, in
excess of $25,000;

                  (i) Amend or propose to amend its Articles of Incorporation or
Bylaws; or

                  (j) Incur or commit to incur any capital expenditures in
excess of $100,000 in the aggregate or in excess of $50,000 as to any individual
matter;

                  (k) Lease, license, sell, transfer or encumber or permit to be
encumbered any asset, Platform Proprietary Right or other property associated
with the business of Platform (including sales or transfers to Affiliates of
Platform), except for sales of inventory in the usual and ordinary course of
business and except for cash applied in payment of Platform's liabilities in the
usual and ordinary course of its business;

                  (1) Enter into any lease or contract for the purchase or sale
of any property, real or personal except in the ordinary course of business;

                  (m) Fail to maintain its equipment and other assets in good
working condition and repair according to the standards it has maintained up to
the date of this Agreement, subject only to ordinary wear and tear;

                  (n)      Change accounting methods;

                  (o) Amend or terminate any material contract, agreement or
license to which it is a party except in the ordinary course of business;

                  (p) Loan any amount to any person or entity, or guaranty or
act as a surety for any obligation;

                  (q) Waive or release any material right or claim, except in
the ordinary course of business;

                  (r) Make or change any Tax or accounting election, change any
annual accounting period, adopt or change any accounting method, file any
amended Return, enter into any closing agreement, settle any Tax claim or
assessment relating to Platform, surrender any right to claim refund of Taxes,
consent to any extension or waiver of the limitation period applicable to any
Tax claim or assessment relating to Platform, or take any other action or omit
to take any action, if any such election, adoption, change, amendment,
agreement, settlement, surrender, consent or other action or omission would have
the effect of increasing the Tax liability of Platform or ESS;

                  (s) Do anything that would cause there to be a Material
Adverse Change with respect to Platform; or

                  (t) Take, or agree in writing or otherwise to take, any of the
actions described in Sections (a) through (s) above, or any action which is
reasonably likely to make any of 



                                      -34-
<PAGE>   40

Platform's representations or warranties contained in this Agreement untrue or
incorrect in any material respect on the date made (to the extent so limited) or
as of the Effective Time.

         Section 5.4 Access to Information. Until the Closing, Platform shall
allow ESS and its agents reasonable free access upon reasonable notice and
during normal working hours to its files, books, records, and offices,
including, without limitation, any and all information relating to taxes,
commitments, contracts, leases, licenses, and personal property and financial
condition. Until the Closing, Platform shall cause its accountants to cooperate
with ESS and its agents in making available all financial information requested,
including without limitation the right to examine all working papers pertaining
to all financial statements prepared or audited by such accountants. No
information or knowledge obtained in any investigation pursuant to this Section
shall effect or be deemed to modify any representation or warranty contained in
this Agreement or its exhibits and schedules. All such access shall be subject
to the terms of the Confidentiality Agreement (as defined in Section 7.1).

         Section 5.5 Satisfaction of Conditions Precedent. Platform will use its
best efforts to satisfy or cause to be satisfied all the conditions precedent
which are set forth in Sections 8.1 and 8.2, and Platform will use its best
efforts to cause the transactions contemplated by this Agreement to be
consummated, and, without limiting the generality of the foregoing, to obtain
all consents and authorizations of third parties and to make all filings with,
and give all notices to, third parties which may be necessary or reasonably
required on its part in order to effect the transactions contemplated by this
Agreement. Platform shall use its best efforts to obtain any and all consents
necessary for the assumption of those Material Contracts listed on Schedule 5.1
of the Platform Disclosure Schedule by the Surviving Corporation concurrent with
the Merger (the "MATERIAL Consents").

         Section 5.6 Other Negotiations. Platform will not (and it will not
permit any of its officers, directors, employees, agents and Affiliates on its
behalf to) take any action to solicit, initiate, seek, encourage or support any
inquiry, proposal or offer from, furnish any information to, or participate in
any negotiations with, any corporation, partnership, person or other entity or
group (other than ESS) regarding any acquisition of Platform, any merger or
consolidation with or involving Platform, or any acquisition of any material
portion of the stock or assets of Platform (any of the foregoing being referred
to in this Agreement as an "ACQUISITION TRANSACTION") or enter into an agreement
concerning any Acquisition Transaction with any party other than ESS. If between
the date of this Agreement and the termination of this Agreement pursuant to
Section 9.1, Platform receives from a third party any offer or indication of
interest regarding any Acquisition Transaction, or any request for information
regarding any Acquisition Transaction, Platform shall (i) notify ESS immediately
(orally and in writing) of such offer, indication of interest or request,
including the full terms of any proposal therein, (ii) notify such third party
of Platform's obligations under this Agreement and (iii) reject any offer so
received.

         Section 5.7 Shareholder's Agreement. Platform will use its best efforts
to cause each shareholder of Platform owning Platform Common Stock, Platform
Class B Common Stock or Platform Preferred Stock at the Effective Time to
execute and deliver to ESS the form of 



                                      -35-
<PAGE>   41

shareholder's agreement attached to this Agreement as Exhibit A (the
"SHAREHOLDER'S AGREEMENT").

         Section 5.8 Amendment to Certain Platform Agreements. Platform shall
use its best efforts on an expedited basis to enter into an amendment to the (a)
License and Development Agreement dated January 9, 1996 with Gulbransen, Inc. to
provide that Platform may buy out its obligation to deliver G-chips and the
associated royalty obligation for an aggregate payment of $1,000,000 and (b)
Development Agreement (Number 88019) dated March 11, 1996 with TriTech
Microelectronics International Pte Ltd. to provide that Platform's obligation to
purchase units shall remain in effect only if Platform wishes to have
manufacturing rights to such products. The foregoing amended agreements shall be
in form and substance satisfactory to ESS.

                                   ARTICLE VI

                  PRECLOSING AND OTHER COVENANTS OF ESS AND SUB

         Section 6.1 Advice of Changes. ESS and Sub will promptly advise
Platform in writing of any event occurring subsequent to the date of this
Agreement which would render any representation or warranty of ESS or Sub
contained in this Agreement, if made on or as of the date of such event or the
Closing Date, untrue or inaccurate in any material respect.

         Section 6.2 Reservation of ESS Common Stock. ESS shall reserve for
issuance, out of its authorized but unissued capital stock, the maximum number
of shares of ESS Common Stock as may be issuable upon consummation of the
Merger.

         Section 6.3 Satisfaction of Conditions Precedent. ESS and Sub will use
their best efforts to satisfy or cause to be satisfied all the conditions
precedent which are set forth in Sections 8.1 and 8.3, and ESS and Sub will use
their best efforts to cause the transactions contemplated by this Agreement to
be consummated, and, without limiting the generality of the foregoing, to obtain
all consents and authorizations of third parties and to make all filings with,
and give all notices to, third parties which may be necessary or reasonably
required on its part in order to effect the transactions contemplated hereby.

         Section 6.4 Nasdaq National Market Listing. ESS shall cause the shares
of ESS Common Stock issuable to the shareholders of Platform in the Merger
including shares of ESS Common Stock issuable upon exercise of ESS Options
and/or ESS Warrants to be authorized for listing on the Nasdaq National Market,
subject to official notice of issuance.

         Section 6.5 Stock Options.

                  (a) At the Effective Time, each outstanding Platform Option
under the Platform Option Plan, whether vested or unvested, shall be deemed to
constitute an option (a "ESS OPTION") to acquire, on the same terms and
conditions as were applicable under the Platform Option, the same number of
shares of ESS Common Stock as the holder of such Platform Option would have been
entitled to receive pursuant to the Merger had such holder exercised such option
to purchase Platform Common Stock or Platform Class B Common Stock 



                                      -36-
<PAGE>   42

in full immediately prior to the Effective Time (rounded down to the nearest
whole number), at a price per share (rounded up to the nearest whole cent) equal
to (i) the aggregate exercise price for the shares of Platform Common Stock or
Platform Class B Common Stock otherwise purchasable pursuant to such Platform
Option divided by (ii) the number of full shares of ESS Common Stock deemed
purchasable pursuant to such ESS Option in accordance with the foregoing;
provided, however, that, in the case of any Platform Option to which Section 422
of the Code applies ("INCENTIVE STOCK OPTIONS"), the option price, the number of
shares purchasable pursuant to such option and the terms and conditions of
exercise of such option shall be determined in order to comply with Section
424(a) of the Code. In connection with the assumption by ESS of the Platform
Options pursuant to this Section 6.5(a), Platform shall assign to ESS, effective
at the Effective Time, Platform's right to repurchase unvested shares of
Platform Common Stock issuable upon the exercise of the Platform Options or
previously issued upon the exercise of options granted under the Platform Option
Plan, in accordance with the terms of the Platform Option Plan and the related
stock option agreements and stock purchase agreements entered into under the
Platform Option Plan.

                  (b) As soon as practicable after the Effective Time, ESS shall
deliver to the participants in the Platform Option Plan appropriate notice
setting forth such participants' rights pursuant thereto and the grants pursuant
to the Platform Option Plan shall continue in effect on the same terms and
conditions (subject to the adjustments required by this Section 6.5 after giving
effect to the Merger). ESS shall comply with the terms of the Platform Option
Plan and ensure, to the extent required by, and subject to the provisions of,
such Platform Option Plan and Sections 422 and 424(a) of the Code, that Platform
Options which qualified as incentive stock options prior the Effective Time
continue to qualify as incentive stock options after the Effective Time.

                  (c) ESS shall take all corporate action necessary to reserve
for issuance a sufficient number of shares of ESS Common Stock for delivery
under Platform Options assumed in accordance with this Section 6.5. As soon as
practicable after the Effective Time and in any event no later than 10 business
days after the Closing Date, ESS shall file a registration statement on Form S-8
(or any successor forms) under the Securities Act of 1933, as amended, (the
"SECURITIES ACT"), with respect to the shares of ESS Common Stock subject to
such options and shall use its best efforts to maintain the effectiveness of
such registration statement or registration statements (and maintain the current
status of the prospectus or prospectuses contained therein) for so long as such
options remain outstanding.

                  (d) Employees of Platform as of the Effective Time shall be
permitted to participate in the ESS Employee Stock Purchase Plan (the "ESS
ESPP") commencing on the first enrollment date following the Effective Time,
subject to compliance with the eligibility and other provisions of such plan
(with employees receiving credit, for purpose of such eligibility provisions,
for all service prior to the Effective Time with Platform to the extent
permissible under the ESS ESPP).

                  (e) Employees of Platform at the Effective Time will be
provided with employee benefit plans by the Surviving Corporation or ESS which
in the aggregate are no less 



                                      -37-
<PAGE>   43

favorable to such employees than those provided from time to time by ESS and its
Subsidiaries to similarly situated employees. If any employee of Platform
becomes a participant in any employee benefit plan, program, policy or
arrangement of ESS, such employee shall be given credit for all service prior to
the Effective Time with Platform to the extent permissible under such plan,
program, policy or arrangement.

         Section 6.6 Registration of Shares Issued in the Merger. ESS hereby
agrees to grant to the holders of shares of ESS Common Stock issued pursuant to
this Agreement at the Effective Time of the Merger certain S-3 registration
rights for certain trading windows or, if permitted under the Securities Act an
S-8 registration right, as set forth in the Declaration of Registration Rights
in the form attached hereto as Exhibit H ("DECLARATION OF REGISTRATION RIGHTS").

                                   ARTICLE VII

                                OTHER AGREEMENTS

         Section 7.1 Confidentiality. Each party acknowledges ESS and Platform
have previously executed a Mutual Non-Disclosure Agreement dated March 27, 1997
(the "CONFIDENTIALITY AGREEMENT"), which Confidentiality Agreement shall
continue in full force and effect in accordance with its terms.

         Section 7.2 No Public Announcement. The parties shall make no public
announcement concerning this Agreement, their discussions or any other
memoranda, letters or agreements between the parties relating to the Merger
until such time as they agree to the contents of a mutually satisfactory press
release; provided, however, that either of the parties, but only after
reasonable consultation with the other, may make disclosure if required under
applicable law.

         Section 7.3 Regulatory Filings; Consents; Reasonable Efforts. Subject
to the terms and conditions of this Agreement, Platform and ESS shall use their
respective best efforts to (i) make all necessary filings with respect to the
Merger and this Agreement under the Exchange Act and applicable blue sky or
similar securities laws and obtain required approvals and clearances with
respect thereto and supply all additional information requested in connection
therewith; (ii) make merger notification or other appropriate filings with
federal, state or local governmental bodies or applicable foreign governmental
agencies and obtain required approvals and clearances with respect thereto and
supply all additional information requested in connection therewith; (iii)
obtain all consents, waivers, approvals, authorizations and orders required in
connection with the authorization, execution and delivery of this Agreement and
the consummation of the Merger; and (iv) take, or cause to be taken, all
appropriate action, and do, or cause to be done, all things necessary, proper or
advisable to consummate and make effective the transactions contemplated by this
Agreement as promptly as practicable, but no later than September 15, 1997.

         Section 7.4 Shareholder's Agreements. Platform will deliver to ESS a
list of its shareholders concurrently with the execution of this Agreement and
shall use its best efforts to cause its shareholders to sign and deliver to ESS
a Shareholder's Agreement.



                                      -38-
<PAGE>   44

         Section 7.5 Further Assurances. Prior to and following the Closing,
each party agrees to cooperate fully with the other parties and to execute such
further instruments, documents and agreements and to give such further written
assurances, as may be reasonably requested by any other party to better evidence
and reflect the transactions described herein and contemplated hereby and to
carry into effect the intents and purposes of this Agreement.

         Section 7.6 Escrow Agreement. On or before the Effective Time, ESS
shall, and the parties hereto shall exercise their best efforts to cause the
Escrow Agent (as defined in Section 10.2) and the Shareholders' Agent (as
defined in Section 10.9) to enter into an Escrow Agreement in the form attached
hereto as Exhibit B. The adoption of this Agreement and the approval of the
Merger by the shareholders of Platform shall constitute approval of the Escrow
Agreement and of all arrangements relating to the Escrow Agreement, including,
without limitation, the placement of the Escrow Shares in escrow and the
appointment of the Shareholders' Agent.

         Section 7.7 FIRPTA. Platform shall, prior to the Closing Date, provide
ESS with a properly executed Foreign Investment and Real Property Tax Act of
1980 ("FIRPTA") FIRPTA Notification Letter, substantially in the form of Exhibit
C attached hereto, which states that shares of capital stock of Platform do not
constitute "United States real property interests" under Section 897(c) of the
Code, for purposes of satisfying ESS obligations under Treasury Regulation
Section 1.1445-2(c)(3). In addition, simultaneously with delivery of such FIRPTA
Notification Letter, Platform shall provide to ESS, as agent for Platform, a
form of notice to the Internal Revenue Service in accordance with the
requirements of Treasury Regulation Section 1.897-2(h)(2) and substantially in
the form of Exhibit C attached hereto, along with written authorization for ESS
to deliver such notice form to the Internal Revenue Service on behalf of
Platform upon the Closing of the Merger.

         Section 7.8 Blue Sky Laws. ESS shall take such steps as may be
necessary to comply with the securities and blue sky laws of all jurisdictions
which are applicable to the issuance of the ESS Common Stock in connection with
the Merger. Platform shall use its best efforts to assist ESS as may be
necessary to comply with the securities and blue sky laws of all jurisdictions
which are applicable in connection with the issuance of ESS Common Stock in
connection with the Merger.

         Section 7.9 Information Statement; Other Filings; Board
Recommendations. As promptly as practicable after the execution of this
Agreement, Platform and ESS will prepare, and distribute the Information
Statement to the shareholders of Platform at the earliest practicable time. As
promptly as practicable after the date of this Agreement, Platform and ESS will
prepare and file any other filings required under the Exchange Act, the
Securities Act or any other Federal, foreign or state securities or blue sky
laws relating to the Merger and the transactions contemplated by this Agreement
(the "OTHER FILINGS"). The Information Statement and the Other Filings will
comply in all material respects with all applicable requirements of law and the
rules and regulations promulgated thereunder. Whenever any event occurs which is
required to be set forth in an amendment or supplement to the Information
Statement or any Other Filing, Platform or ESS, as the case may be, will
promptly inform the other of such 



                                      -39-
<PAGE>   45

occurrence and cooperate in making any appropriate amendment or supplement,
and/or mailing to shareholders of Platform, such amendment or supplement. The
Information Statement will include the recommendation of the Board of Directors
of Platform in favor of adoption and approval of this Agreement and approval of
the Merger.

         Section 7.10 Tax-Free Reorganization. No party shall take any action
either prior to or after the Effective Time that could reasonably be expected to
cause the Merger to fail to qualify as a "reorganization" under Section 368(a)
of the Code.

                                  ARTICLE VIII

                              CONDITIONS TO MERGER

         Section 8.1 Conditions to Each Party's Obligation to Effect the Merger.
The respective obligations of each party to this Agreement to effect the Merger
shall be subject to the satisfaction prior to the Closing Date of the following
conditions:

                  (a) Shareholder Approval. The shareholders of Platform
entitled to vote on or consent to this Agreement and the Merger in accordance
with California Law and Platform's Articles of Incorporation shall have approved
this Agreement, the Merger and the amendment and restatement of Platform's
Articles of Incorporation in accordance with California Law and the Articles of
Incorporation of Platform.

                  (b) Approvals. Other than the filing provided for by Section
1.1, all authorizations, consents, orders or approvals of, or declarations or
filings with, or expirations of waiting periods imposed by, any Governmental
Entity the failure of which to obtain would be reasonably likely to have a
Material Adverse Effect on ESS and its Subsidiaries, taken as a whole, or
Platform shall have been filed, occurred or been obtained.

                  (c) No Injunctions or Restraints; Illegality. No temporary
restraining order, preliminary or permanent injunction or other order issued by
any court of competent jurisdiction or other legal or regulatory restraint or
prohibition preventing the consummation of the Merger or limiting or restricting
ESS' conduct or operation of the business of ESS after the Merger shall have
been issued, nor shall any proceeding brought by a domestic administrative
agency or commission or other domestic Governmental Entity, seeking any of the
foregoing be pending; nor shall there be any action taken, or any statute, rule,
regulation or order enacted, entered, enforced or deemed applicable to the
Merger which makes the consummation of the Merger illegal.

                  (d) Nasdaq. The shares of ESS Common Stock to be issued in the
Merger shall have been approved for listing on the Nasdaq National Market upon
official notice of issuance.

                  (e) Tax Opinions. Platform and ESS shall each have received
written opinions from their respective counsel, Wilson Sonsini Goodrich &
Rosati, Professional Corporation, and Venture Law Group, A Professional
Corporation, in form and substance 



                                      -40-
<PAGE>   46

reasonably satisfactory to them, to the effect that the Merger will constitute a
reorganization within the meaning of Section 368(a) of the Code and such
opinions shall not have been withdrawn; provided, however, that if the counsel
to either Platform or ESS does not render such opinion, this condition shall
nonetheless be deemed to be satisfied with respect to such party if counsel to
the other party renders such opinion to such party. In rendering such opinions
counsel should be entitled to rely upon, and the other parties hereto shall
make, reasonable representations as requested by such counsel for the purpose of
rendering such opinions.

         Section 8.2 Additional Conditions to Obligations of ESS and Sub. The
obligations of ESS and Sub to effect the Merger are subject to the satisfaction
of each of the following conditions, any of which may be waived in writing
exclusively by ESS and Sub:

                  (a) Representations and Warranties. The representations and
warranties of Platform set forth in this Agreement shall be true and correct in
all material respects as of the date of this Agreement and (except to the extent
such representations and warranties speak as of an earlier date) as of the
Closing Date as though made on and as of the Closing Date, except for, (i)
changes contemplated by this Agreement, and (ii) where the failure to be true
and correct would not be reasonably likely to have a Material Adverse Effect on
Platform or a Material Adverse Effect upon the consummation of the transactions
contemplated hereby; and ESS shall have received a certificate signed on behalf
of Platform by the chief executive officer and the chief financial officer of
Platform to such effect.

                  (b) Performance of Obligations of Platform. Platform shall
have performed in all material respects all obligations required to be performed
by it under this Agreement at or prior to the Closing Date; and ESS shall have
received a certificate signed on behalf of Platform by the chief executive
officer and the chief financial officer of Platform to such effect.

                  (c) Blue Sky Laws. ESS shall have received all state
securities or "blue sky" permits and other authorizations necessary to issue
shares of ESS Common Stock pursuant to the Merger.

                  (d) Shares Exchanged. A minimum of 90% of the outstanding
shares of Platform Common Stock, Platform Class B Common Stock and Platform
Preferred Stock shall be converted into the right to receive ESS Common Stock,
as set forth in Section 2.1, as of the Effective Time.

                  (e) Escrow Agreement. The Escrow Agent and Shareholders' Agent
shall have executed and delivered to ESS, the Escrow Agreement.

                  (f) Shareholder's Agreements. Each shareholder of Platform
receiving ESS Common Stock in the Merger shall have executed and delivered to
ESS a Shareholder's Agreement.

                  (g) Opinion of Platform's Counsel. ESS shall have received an
opinion dated the Closing Date of Wilson, Sonsini, Goodrich & Rosati,
Professional Corporation, counsel to Platform, as to the matters in the form
attached hereto as Exhibit D.



                                      -41-
<PAGE>   47

                  (h) Third Party Consents. Except as set forth in the
Disclosure Schedule, ESS shall have been furnished with evidence satisfactory to
it of the consent or approval of those persons whose consent or approval shall
be required in connection with the Merger under any Material Contract of
Platform or otherwise.

                  (i) Resignations of Officers and Directors. The officers and
directors of Platform shall have resigned from their respective positions
effective as of the Effective Time.

                  (j) Expense Statement. ESS shall have received from Platform a
statement of its best estimate of all out-of-pocket expenses incurred by
Platform which are subject to the limitation described in Section 9.3(b). Such
statement shall state that Platform reasonably believes that such amount
constitutes all of such expenses.

                  (k) Shareholder's Waiver of Registration Rights and Other
Agreements. All obligations and liabilities of Platform under (i) the Rights
Agreement dated October 25, 1996 among Platform and the investors identified on
Exhibit A thereto (ii) the Right of First Refusal and Co-Sale Agreement dated as
of October 25, 1996 by and among Paul Tien, Ephraim Kwok, the Company and the
holders of Series C Preferred Stock listed on Exhibit A thereto, (iii) the
Series C Preferred Stock and Warrant Purchase Agreement dated as of October 25,
1996 among the Company and the purchasers listed on the Schedule of Purchasers
thereto, (iv) the Series B Preferred Stock Purchase Agreement dated as of
November 30, 1995 among the Company and the persons listed on Exhibit A thereto,
or (v) the Series A Preferred Stock Purchase Agreement dated as of November 28,
1995 among the Company and the persons listed on Exhibit A thereto, shall have
been terminated.

                  (l) Employment Agreement and Noncompetition Agreement. Each of
Messrs. Paul Tien, Cherng-Yeuan Tsay, Steven Wang, Steven Kin-Ting Wong and Mark
Klonower shall have entered into an Employment Agreement and a Noncompetition
Agreement in substantially the forms attached hereto as Exhibit E and Exhibit F,
respectively.

                  (m) Employee and Consultant Agreements. Except as set forth in
the Disclosure Schedule with respect to this Section 8.2(m), present employees
of and consultants to Platform shall have entered into Confidentiality and
Invention Assignment Agreements with Platform relating to their entire period of
employment with and consultancy to the Company. Such agreements shall be in
substantially the form entered into with Platform's employees and consultants
generally.

                  (n) Notification Letter Issues. No injunctive relief shall
have been granted to any third party by or before any agency, court or tribunal
against Mr. Tien or Platform arising out of or relating to claims or assertions
contained in the Notification Letter which injunctive relief would preclude ESS
or the Surviving Corporation from shipping any Platform Products and is in full
force and effect as of the Closing Date.

                  (o) Exercise of Platform Warrants and Other Convertible
Securities. All Platform Warrants shall have been exercised for Series C
Preferred Stock with the full consideration for such exercise to be delivered to
Platform at the time of the exercise of the 



                                      -42-
<PAGE>   48

Platform Warrants and to consist exclusively of cash, a cashier's check payable
to Platform or a wire transfer. No Series C Preferred Stock shall be issued
pursuant to a Net Issue Exercise (as defined by the Platform Warrant) of any
Platform Warrant. All other options, warrants or other securities convertible
into or exchangeable for Platform Preferred Stock or Platform Common Stock
(other than Platform Options outstanding under the Platform Option Plan) shall
have been converted into Platform Common Stock. Except for the Platform Options,
Platform Preferred Stock and Platform Common Stock, no Platform Warrants or
other options, warrants or other convertible securities issued by Platform shall
be outstanding.

         Section 8.3 Additional Conditions to Obligations of Platform. The
obligation of Platform to effect the Merger is subject to the satisfaction of
each of the following conditions, any of which may be waived, in writing,
exclusively by Platform:

                  (a) Representations and Warranties. The representations and
warranties of ESS and Sub set forth in this Agreement shall be true and correct
in all material respects as of the date of this Agreement and (except to the
extent such representations speak as of an earlier date) as of the Closing Date
as though made on and as of the Closing Date, except for, (i) changes
contemplated by this Agreement, and (ii) where the failure to be true and
correct would not be reasonably likely to have a Material Adverse Effect on ESS
and its Subsidiaries, taken as a whole, or a material adverse effect upon the
consummation of the transactions contemplated hereby; and Platform shall have
received a certificate signed on behalf of ESS by the chief executive officer
and the chief financial officer of ESS to such effect.

                  (b) Performance of Obligations of ESS and Sub. ESS and Sub
shall have performed in all material respects all obligations required to be
performed by them under this Agreement at or prior to the Closing Date; and
Platform shall have received a certificate signed on behalf of ESS by the chief
executive officer and the chief financial officer of ESS to such effect.

                  (c) Opinion of ESS' Counsel. Platform shall have received an
opinion dated the Closing Date of Venture Law Group, A Professional Corporation,
counsel to ESS, as to the matters attached hereto as Exhibit G.

                                   ARTICLE IX

                            TERMINATION AND AMENDMENT

         Section 9.1 Termination. This Agreement may be terminated at any time
prior to the Effective Time, whether before or after approval of the matters
presented in connection with the Merger by the shareholders of Platform:

                  (a) by mutual written consent of ESS and Platform; or

                  (b) by either ESS or Platform, by giving written notice to the
other party, if a court of competent jurisdiction or other Governmental Entity
shall have issued a nonappealable final order, decree or ruling or taken any
other action, in each case having the effect of 



                                      -43-
<PAGE>   49

permanently restraining, enjoining or otherwise prohibiting the Merger, except,
if the party relying on such order, decree or ruling or other action has not
complied with its obligations under Section 7.3 of this Agreement; or

                  (c) by ESS or Platform, by giving written notice to the other
party, if the other party is in breach of any material representation, warranty,
or covenant of such other party contained in this Agreement, which breach shall
not have been cured, if subject to cure, within 10 business days following
receipt by the breaching party of written notice of such breach by the other
party; or

                  (d) by ESS, by giving written notice to Platform, if the
Closing shall not have occurred on or before September 15, 1997 by reason of the
failure of any condition precedent under Section 8.1 or 8.2 (unless the failure
results primarily from a breach by ESS of any representation, warranty, or
covenant of ESS contained in this Agreement); or

                  (e) by Platform, by giving written notice to ESS, if the
Closing shall not have occurred on or before September 15, 1997 by reason of the
failure of any condition precedent under Section 8.1 or 8.3 (unless the failure
results primarily from a breach by Platform of any representation, warranty, or
covenant of Platform contained in this Agreement).

                  (f) by either ESS or Platform if the required approvals of the
shareholders of Platform contemplated by this Agreement shall not have been
obtained by reason of the failure to obtain the required vote upon a vote taken
at a meeting of shareholders, duly convened therefor or at any adjournment
thereof; provided that the right to terminate this Agreement under this Section
9.1(f) shall not be available to any party where the failure to obtain
shareholder approval of such party shall have been caused by the action or
failure to act of such party in breach of this Agreement.

         Section 9.2 Effect of Termination. In the event of termination of this
Agreement as provided in Section 9.1, this Agreement shall immediately become
void and there shall be no liability or obligation on the part of ESS, Platform,
Sub or their respective officers, directors, shareholders or Affiliates, except
as set forth in Section 9.3 and further except to the extent that such
termination results from the willful breach by any party of any of its
representations, warranties or covenants set forth in this Agreement.

         Section 9.3 Fees and Expenses.

                  (a) Except as set forth in this Section 9.3, all fees and
expenses incurred in connection with this Agreement and the transactions
contemplated hereby shall be paid by the party incurring such expenses, whether
or not the Merger is consummated.

                  (b) If the Merger is consummated, all legal, accounting,
investment banking, broker's and finder's fees and expenses incurred by Platform
or its shareholders in connection with the Merger shall be deemed expenses of
the shareholders of Platform to the extent such fees and expenses exceed
$300,000 and shall be borne by the shareholders of Platform to such extent and
will not become obligations of Platform; provided that all accounting fees and
expenses 



                                      -44-
<PAGE>   50

incurred in connection with the audit of Platform's financial statements for use
in the Registration Statement on Form S-4 or the filing of a Form 8-K by ESS
shall be expenses of Platform and shall not be borne by the shareholders of
Platform. Platform will make arrangements for the payments of such fees
acceptable to ESS. Any such fees and expenses in excess of $300,000 incurred by
Platform shall be recoverable from the Escrow Fund (as defined in Section 10.2)
as Damages (as defined in Section 10.1) without regard to the damage threshold
as contemplated by Section 10.4.

                                    ARTICLE X

                           ESCROW AND INDEMNIFICATION

         Section 10.1 Indemnification. From and after the Effective Time and
subject to the limitations contained in Section 10.2, the Former Platform
Shareholders will severally and pro rata, in accordance with their Pro Rata
Portion, indemnify and hold ESS harmless against any loss, expense, liability or
other damage, including attorneys' fees, to the extent of the amount of such
loss, expense, liability or other damage (collectively "DAMAGES") that ESS has
incurred by reason of the breach by Platform of any representation, warranty,
covenant or agreement of Platform contained in this Agreement, or by reason of
any alleged misrepresentation or breach of warranty by Platform made in or
pursuant to Article III of this Agreement, and for which ESS has not received
reimbursement pursuant to insurance or otherwise; provided that the aggregate
liability of the Former Platform Shareholders under this Article X shall in no
event exceed an amount equal to the product of 2,540,000 multiplied by the
Closing Stock Price.

         Section 10.2 Escrow Fund. As security for the indemnities in Section
10.1, as soon as practicable after the Closing Date, the Escrow Shares shall be
registered in the name of the Former Platform Shareholders, and be deposited
with, Chase Trust Company of California (or such other institution selected by
ESS with the reasonable consent of Platform) as escrow agent (the "ESCROW
AGENT"), such deposit to constitute the Escrow Fund (the "ESCROW FUND") and to
be governed by the terms set forth in this Article X and in the Escrow
Agreement. To the extent Escrow Shares are sold from the escrow, the proceeds of
such sale of Escrow Shares ("ESCROW CASH") shall become part of the Escrow. To
the extent Escrow Cash is invested in investments ("ESCROW INVESTMENTS"), such
Escrow Investments (and upon any sale of such Escrow Investments, the Escrow
Cash Proceeds thereof) shall become part of the Escrow Fund. Notwithstanding the
foregoing, the indemnification obligations of the Former Platform Shareholders
pursuant to this Article X shall be limited to the amount and assets deposited
and present in the Escrow Fund and ESS shall not be entitled to pursue any
claims for indemnification under this Article X against the Former Platform
Shareholders directly or personally and the sole recourse of ESS shall be to
make claims against the Escrow Fund in accordance with the terms of the Escrow
Agreement; provided, however, that no such limitations shall apply with respect
to any claim based upon or relating to Platform's lack of ownership of the
Platform Proprietary Rights or Platform Products or any matter referenced in the
Notification Letter (other than any lack of ownership constituting any
infringement by any Platform Proprietary Right on the patent, trademark,
tradename or service mark of any third party which will not be subject to this
proviso).



                                      -45-
<PAGE>   51

         Section 10.3 Damage Threshold. Notwithstanding the foregoing, the
Former Platform Shareholders shall have no liability under Section 10.1 and ESS
may not receive any shares, cash or other assets equal in value to the full
amount of Damages from the Escrow Fund unless and until an Officer's Certificate
or Certificates (as defined in Section 10.5 below) for an aggregate amount of
ESS' Damages in excess of $200,000 has been delivered to the Shareholders' Agent
and to the Escrow Agent; provided, however, that after an Officer's Certificate
or Certificates for an aggregate of at least $200,000 in Damages has been
delivered and liability and the amount of the Damages have been appropriately
resolved under this Article X, ESS shall be entitled to receive Escrow Shares,
Escrow Cash and Escrow Investments (together, the "ESCROW ASSETS") equal in
value to the full amount of Damages identified in such Officer's Certificate or
Certificates.

         Section 10.4 Escrow Periods. The Escrow Fund shall terminate on the
date one year from the date of Closing (the period from the Closing to such date
referred to as the "ESCROW PERIOD"), provided, however, that the value of Escrow
Assets, which, in the reasonable judgment of ESS, subject to the objection of
the Shareholders' Agent and the subsequent arbitration of the matter in the
manner provided in Section 10.8, are necessary to satisfy any unsatisfied claims
specified in any Officer's Certificate theretofore delivered to the Escrow Agent
prior to termination of the relevant Escrow Period with respect to Damages
incurred or litigation pending prior to expiration of the relevant Escrow
Period, shall remain in the Escrow Fund until such claims have been resolved. In
no event will any amount be retained in the Escrow Fund at the end of the Escrow
Period, except as to claims made prior to the end of the Escrow Period that
relate to Damages actually incurred or pending litigation.

         Section 10.5 Claims Upon Escrow Fund. Upon receipt by the Escrow Agent
on or before the last day of the Escrow Period of a certificate signed by any
officer of ESS (an "OFFICER'S CERTIFICATE"):

                      (i) Stating the aggregate amount of ESS' Damages and,

                      (ii) Specifying in reasonable detail the individual items
of such Damages included in the amount so stated, the date each such item was
paid or properly accrued or arose, and the nature of the misrepresentation,
breach of warranty or claim to which such item is related, the Escrow Agent
shall, subject to the provisions of Sections 10.3, 10.7 and 10.8 hereof, deliver
to ESS out of the Escrow Fund, as promptly as practicable, Escrow Assets having
a value equal to such Damages all in accordance with the Escrow Agreement; the
relative amounts of Escrow Shares, Escrow Cash and Escrow Investments shall be
allocated in accordance with the provisions of the Escrow Agreement. Amounts
paid or distributed from the Escrow Fund shall be borne pro rata among the
Holders (as defined in the Escrow Agreement).

         Section 10.6 Valuation. For the purpose of compensating ESS for its
Damages pursuant to this Agreement, the value per share of the Escrow Shares
shall be the Closing Stock Price.

         Section 10.7 Objections to Claims. At the time of delivery of any
Officer's Certificate to the Escrow Agent, a duplicate copy of such Officer's
Certificate shall be delivered to the 



                                      -46-
<PAGE>   52

Shareholders' Agent (as defined in Section 10.9 below) and for a period of
thirty (30) days after such delivery to the Escrow Agent, the Escrow Agent shall
make no delivery of Escrow Assets pursuant to Section 10.4 unless the Escrow
Agent shall have received written authorization from the Shareholders' Agent to
make such delivery. After the expiration of such thirty (30) day period, the
Escrow Agent shall make delivery of the Escrow Shares, Escrow Cash and Escrow
Investments in the Escrow Fund in accordance with Section 10.5, provided that no
such delivery may be made if the Shareholders' Agent shall object in a written
statement to the claim made in the Officer's Certificate, and such statement
shall have been received by the Escrow Agent and ESS prior to the expiration of
such thirty (30) day period.

         Section 10.8 Resolution of Conflicts.

                  (a) In case the Shareholders' Agent shall so object in writing
to any claim or claims by ESS made in any Officer's Certificate, ESS shall have
thirty (30) days after receipt of such objection to respond in a written
statement to the objection of the Shareholders' Agent. If after such thirty (30)
day period there remains a dispute as to any claims, the Shareholders' Agent and
ESS shall attempt in good faith for thirty (30) days to agree upon the rights of
the respective parties with respect to each of such claims. If, after an
objection by the Shareholders' Agent, the Shareholders' Agent and ESS should
come to an agreement, a memorandum setting forth such agreement shall be
prepared and signed by both parties and shall be furnished to the Escrow Agent.
The Escrow Agent shall be entitled to conclusively rely on any such memorandum
and shall distribute the Escrow Shares, Escrow Cash and Escrow Investments from
the Escrow Fund in accordance with the terms of the memorandum.

                  (b) If no such agreement can be reached after good faith
negotiation, either ESS or the Shareholders' Agent may, by written notice to the
other, demand arbitration of the matter unless the amount of the damage or loss
is at issue in pending litigation with a third party, in which event arbitration
shall not be commenced until such amount is ascertained or both parties agree to
arbitration; and in either such event the matter shall be settled by arbitration
conducted by three arbitrators. Within fifteen (15) days after such written
notice is sent, ESS and the Shareholders' Agent shall each select one
arbitrator, and the two arbitrators so selected shall select a third arbitrator.
The decision of the arbitrators as to the validity and amount of any claim in
such Officer's Certificate shall be binding and conclusive upon the parties to
this Agreement, and notwithstanding anything in Section 10.4, the Escrow Agent
shall be entitled to act in accordance with such decision and make or withhold
payments out of the Escrow Fund in accordance with such decision.

                  (c) Judgement upon any award rendered by the arbitrators may
be entered in any court having jurisdiction. Any such arbitration shall be held
in Santa Clara or San Mateo County, California under the commercial rules then
in effect of the American Arbitration Association. The non-prevailing party to
an arbitration shall pay its own expenses, the fees of each arbitrator, the
administrative fee of the American Arbitration Association, and the expenses,
including with limitation, attorneys' fees and costs, incurred by the other
party to the arbitration.



                                      -47-
<PAGE>   53

         Section 10.9 Shareholders' Agent.

                  (a) Herbert Chang shall be constituted and appointed as agent
("SHAREHOLDERS' AGENT") for and on behalf of the Former Platform Shareholders to
give and receive notices and communications, to authorize delivery to ESS of the
Escrow Shares or other property from the Escrow Fund in satisfaction of claims
by ESS, to object to such deliveries, to sell in the open market all or any
portion of the Escrow Shares as instructed in writing by all of the Former
Platform Shareholders, to agree to, negotiate, enter into settlements and
compromises of, and demand arbitration and comply with orders of courts and
awards of arbitrators with respect to such claims, and to take all actions
necessary or appropriate in the judgment of the Shareholders' Agent for the
accomplishment of the foregoing. Such agency may be changed by the holders of a
majority in interest of the Escrow Fund from time to time upon not less than ten
(10) days' prior written notice to ESS. No bond shall be required of the
Shareholders' Agent, and the Shareholders' Agent shall receive no compensation
for his services. Notices or communications to or from the Shareholders' Agent
shall constitute notice to or from each of the Former Platform Shareholders.

                  (b) The Shareholders' Agent shall not be liable for any act
done or omitted hereunder as Shareholders' Agent while acting in good faith and
in the exercise of reasonable judgment, and any act done or omitted pursuant to
the advice of counsel shall be conclusive evidence of such good faith. The
Former Platform Shareholders shall severally and pro rata, in accordance with
their Pro Rata Portion, indemnify the Shareholders' Agent and hold him harmless
against any loss, liability or expense incurred without gross negligence or bad
faith on the part of the Shareholders' Agent and arising out of or in connection
with the acceptance or administration of his duties hereunder under this
Agreement or the Escrow Agreement.

                  (c) The Shareholders' Agent shall have reasonable access to
information about Platform and ESS and the reasonable assistance of Platform's
and ESS' officers and employees for purposes of performing his duties and
exercising his rights under this Article X, provided that the Shareholders'
Agent shall treat confidentially and not disclose any nonpublic information from
or about Platform or ESS to anyone (except on a need to know basis to
individuals who agree to treat such information confidentially).

         Section 10.10 Actions of the Shareholders' Agent. A decision, act,
consent or instruction of the Shareholders' Agent shall constitute a decision of
all of the Former Platform Shareholders for whom shares of ESS Common Stock
otherwise issuable to them are deposited in the Escrow Fund and shall be final,
binding and conclusive upon each such Former Platform Shareholder, and the
Escrow Agent and ESS may rely upon any decision, act, consent or instruction of
the Shareholders' Agent as being the decision, act, consent or instruction of
each and every such Former Platform Shareholder. The Escrow Agent and ESS are
hereby relieved from any liability to any person for any acts done by them in
accordance with such decision, act, consent or instruction of the Shareholders'
Agent.

         Section 10.11 Claims. In the event ESS becomes aware of a third-party
claim which ESS believes may result in a demand against the Escrow Fund, ESS
shall notify the 



                                      -48-
<PAGE>   54

Shareholders' Agent of such claim, and the Shareholders' Agent and the Former
Platform Shareholders for whom shares of ESS Common Stock otherwise issuable to
them are deposited in the Escrow Fund shall be entitled, at their expense, to
participate in any defense of such claim. ESS shall have the right in its sole
discretion to settle any such claim; provided, however, that ESS may not affect
the settlement of any such claim without the consent of the Shareholders' Agent,
which consent shall not be unreasonably withheld; provided further that the
Shareholder's Agent shall be permitted to settle any claim arising out of claims
or assertions contained in the Notification Letter (including any legal fees
relating thereto payable by the Former Platform Shareholders) for an amount up
to the value of the assets remaining in the Escrow Fund; provided, further, any
Damages consisting of legal fees relating thereto shall be paid 90% by the
Escrow Fund and the Former Platform Shareholders and 10% by ESS. In the event
that the Shareholders' Agent has consented to any such settlement, the
Shareholders' Agent shall have no power or authority to object to the amount of
any claim by ESS against the Escrow Fund for indemnity with respect to such
settlement.

                                   ARTICLE XI

                                  MISCELLANEOUS

         Section 11.1 Survival of Representations and Covenants. All
representations, warranties, covenants and agreements of Platform contained in
this Agreement shall survive the Closing and any investigation at any time made
by or on behalf of ESS until one year from the date of Closing; provided that
claims arising out of or relating to any claim or assertion contained in the
Notification Letter shall survive for two years from the date of Closing. If
Escrow Shares or other assets are retained in the Escrow Fund beyond expiration
of the period specified in the Escrow Agreement, then (notwithstanding the
expiration of such time period) the representation, warranty, covenant or
agreement applicable to such claim shall survive until, but only for purposes
of, the resolution of the claim to which such retained Escrow Shares or other
assets relate. All representations, warranties, covenants and agreements of ESS
contained in this Agreement shall terminate as of the Effective Time, provided
that the covenants and agreements contained in Sections 6.5 and 9.3 shall
survive the Closing and shall continue in full force and effect.

         Section 11.2 Notices. All notices and other communications hereunder
shall be in writing and shall be deemed given if delivered personally,
telecopied (which is confirmed) or mailed by registered or certified mail
(return receipt requested) to the parties at the following addresses (or at such
other address for a party as shall be specified by like notice):

                  with a copy to:

             (a)           if to ESS or Sub:
                           ESS Technology, Inc.
                           48401 Fremont Boulevard
                           Fremont, California  94538
                           Attention:  Chief Executive Officer
                           Telecopy No:  (510) 492-1163
                           Telephone No:  (510) 492-1088



                                      -49-
<PAGE>   55




                  with a copy at the same address to the attention of the 
                  Secretary and with a copy to:

                            Venture Law Group
                            A Professional Corporation
                            2800 Sand Hill Road
                            Menlo Park, California  94025
                            Attention:  Tae Hea Nahm
                            Telecopy No:  (415) 854-1121
                            Telephone No:  (415) 854-4488

             (b)             if to Platform, to:

                            Platform Technologies, Inc.
                            920 Hillview Court, Suite 170
                            Milpitas, California  95035
                            Attention:  President
                            Telecopy No:  (408) 934-9578
                            Telephone No:  (408) 934-9579

                  with a copy to:

                            Wilson, Sonsini, Goodrich & Rosati
                            Professional Corporation
                            650 Page Mill Road
                            Palo Alto, California  94304
                            Attention:  Francis Currie
                                        Carmen Chang
                            Telecopy No:  (415) 493-6811
                            Telephone No:  (415) 493-9300

         Section 11.3 Interpretation. When a reference is made in this Agreement
to Sections, such reference shall be to a Section of this Agreement unless
otherwise indicated. The table of contents and headings contained in this
Agreement are for reference purposes only and shall not affect in any way the
meaning or interpretation of this Agreement. Whenever the words "INCLUDE,"
"INCLUDES" or "INCLUDING" are used in this Agreement they shall be deemed to be
followed by the words "WITHOUT LIMITATION." The phrase "MADE AVAILABLE" in this
Agreement shall mean that the information referred to has been made available if
requested by the party to whom such information is to be made available. The
phrases "THE DATE OF THIS AGREEMENT", "THE DATE HEREOF," and terms of similar
import, unless the context otherwise requires, shall be deemed to refer to April
27, 1997.

         Section 11.4 Counterparts. This Agreement may be executed in two or
more counterparts, all of which shall be considered one and the same agreement
and shall become 



                                      -50-
<PAGE>   56

effective when two or more counterparts have been signed by each of the parties
and delivered to the other parties, it being understood that all parties need
not sign the same counterpart.

         Section 11.5 Entire Agreement; No Third Party Beneficiaries. This
Agreement (including the documents and the instruments referred to herein) and
the Transaction Documents (a) constitute the entire agreement and supersede all
prior agreements and understandings, both written and oral, among the parties
with respect to the subject matter hereof or thereof, and (b) are not intended
to confer upon any person other than the parties hereto any rights or remedies
hereunder.

         Section 11.6 Governing Law. This Agreement shall be governed and
construed in accordance with the laws of the State of California without regard
to any applicable conflicts of law.

         Section 11.7 Assignment. Neither this Agreement nor any of the rights,
interests or obligations hereunder shall be assigned by any of the parties
hereto (whether by operation of law or otherwise) without the prior written
consent of the other parties. Subject to the preceding sentence, this Agreement
will be binding upon, inure to the benefit of and be enforceable by the parties
and their respective successors and assigns.

         Section 11.8 Amendment. This Agreement may be amended by the parties
hereto, at any time before or after approval of matters presented in connection
with the Merger by the Shareholders, but after any such shareholder approval, no
amendment shall be made which by law requires the further approval of
shareholders without obtaining such further approval. This Agreement may not be
amended except by an instrument in writing signed on behalf of each of the
parties hereto.

         Section 11.9 Extension; Waiver. At any time prior to the Effective
Time, the parties hereto may, to the extent legally allowed, (i) extend the time
for the performance of any of the obligations or the other acts of the other
parties hereto, (ii) waive any inaccuracies in the representations or warranties
contained herein or in any document delivered pursuant hereto and (iii) waive
compliance with any of the agreements or conditions contained herein. Any
agreement on the part of a party hereto to any such extension or waiver shall be
valid only if set forth in a written instrument signed on behalf of such party.




                                      -51-
<PAGE>   57

         IN WITNESS WHEREOF, ESS, Sub and Platform have caused this First
Amended and Restated Agreement and Plan of Reorganization to be signed by their
respective officers thereunto duly authorized as of the date first written
above.

PLATFORM TECHNOLOGIES, INC.                ESS TECHNOLOGY, INC.



By: /s/ PAUL TIEN                          By: /s/ FRED S.L. CHAN
    -------------                              ------------------
Title: President                           Title: President




                                           EP ACQUISITION CORPORATION



                                            By: /s/ FRED S.L. CHAN
                                                ------------------
                                            Title: President









                  [SIGNATURE PAGE TO FIRST AMENDED AND RESTATED
                      AGREEMENT AND PLAN OF REORGANIZATION]


                                      -52-

<PAGE>   1
                                                                EXHIBIT 20.1


             ESS TECHNOLOGY TO ACQUIRE PLATFORM TECHNOLOGIES, INC.

        FREMONT, CALIFORNIA, April 16 - ESS Technology, Inc. (Nasdaq:ESST)
announced today it has agreed to acquire privately-held Platform Technologies,
Inc., a developer of multimedia subsystems for 2.2 million shares of ESS common
stock. The acquisition will be accounted for as a pooling of interests
transaction and is expected to be completed by June 30, 1997.

        Platform Technologies was incorporated in August 1995. The company has
introduced a PCI-based audio solution that provides DOS game compatibility over
the PCI bus and complies with Microsoft's PC'97, DirectX and WDM standards and
Intel's specifications of AC-97 and PCI 2.1.

        "Platform Technologies has assembled an exceptional group of design
engineers that are proficient in the PCI architecture and how it can be
employed to develop advanced audio products, while providing compatibility with
DOS games," said Fred Chan, chairman and CEO of ESS. "Our goal is to expand our
leadership in audio products and to provide complete, high quality multimedia
solutions."

        "Platform brings us additional advanced technology including resources
and products that complement and add to our product roadmap. They also provide
specialized technology, the PCI-to-PCI bridge, which allows multifunction
multimedia capability such as audio, modem, graphics, and video, on a single
add-in card using only a single PCI slot. With the 


                                     -more-


<PAGE>   2
                                                                          Page 2

ESS TECHNOLOGY TO ACQUIRE PLATFORM . . .

acquisition of Platform Technologies, we believe we will be shipping PCI
products in the second half of 1997."

        ESS Technology, Inc. is a leading supplier of PC audio and digital
video semiconductor solutions for the PC and consumer markets. ESS designs,
develops, and markets highly integrated mixed signal semiconductor and software
solutions for multimedia applications. ESS, headquartered in Fremont,
California, has sales and technical support offices in Beijing and Shenzhen,
China; Tokyo, Japan; Taipei, Taiwan; Hong Kong; and Austin, Texas. ESS
Technology is listed on the Nasdaq Market System under the symbol ESST. World
Wide Web site: http://www.esstech.com


                                      o0o

        The matters discussed in this news release include certain forward
looking statements that involve risks and uncertainties, including the timely
availability and acceptance of new products, the impact of competitive products
and pricing, the dependence on continued growth in demand for PC and consumer
multimedia products, the management of growth of the company, and the other risk
detailed from time to time in the SEC reports of ESS, including the report on
Form 10-K for the fiscal year ended December 31, 1996. Actual results could
differ materially from those projected in the forward looking statements.


<PAGE>   1
                                                                    EXHIBIT 20.2


             ESS TECHNOLOGY ANNOUNCED STOCK REPURCHASE PROGRAM AND
              CONVERSION OF PLATFORM TECHNOLOGIES ACQUISITION FROM
                        POOLING-OF-INTEREST TO PURCHASE

FREMONT, CALIFORNIA, April 29, 1997 -- ESS Technology, Inc. (Nasdaq: ESST) today
announced that its board of directors has authorized the company to repurchase
up to two million shares of its common stock. In addition, ESS announced it
would change its recent acquisition of Platform Technologies, Inc. from a
pooling of interests, as originally announced, to a purchase. The company
expects to issue 2.54 million shares to shareholders of Platform Technologies.

        The conversion of the acquisition to a purchase is expected to result
in a one-time charge in the second quarter for in-process research and
development expenses. The repurchase program calls for shares to be purchased
in the open market or in private transactions from time to time. The
repurchased shares will be used to partially offset the shares issued for
Platform Technologies, Inc.

        "The company's decision was in consideration of the current price of our
common stock," said Fred S. L. Chan, chairman and chief executive officer. "With
the repurchase program and the change of the acquisition to a purchase, we have
the ability to reduce the number of shares outstanding after the acquisition."

        ESS Technology, Inc. is a leading supplier of PC audio and digital video



                                     -more-
<PAGE>   2
ESS TECHNOLOGY ANNOUNCES STOCK REPURCHASE PROGRAM...                    Page 2

semiconductor solutions for the PC and consumer markets. ESS designs, develops,
and markets highly integrated mixed signal semiconductor and software solutions
for multimedia applications. ESS, headquartered in Fremont, California, has
sales and technical support offices in Beijing and Shenzhen, China; Tokyo,
Japan; Taipei, Taiwan; Hong Kong; and Austin, Texas. ESS Technology is listed
on the Nasdaq Market System under the symbol ESST. World Wide Web site:
http://www.esstech.com


                                      o0o

        The matters discussed in this news release include certain forward
looking statements that involve risks and uncertainties, including the timely
availability and acceptance of new products, the impact of competitive products
and pricing, the dependence on continued growth in demand for PC and consumer
multimedia products, the management of growth of the company, and the other
risk detailed from time to time in the SEC reports of ESS, including the report
on Form 10-K for the year ended December 31, 1996. Actual results could differ
materially from those projected in the forward looking statements.


<PAGE>   1
                                                                    EXHIBIT 20.3


                ESS TECHNOLOGY ANNOUNCES COMPLETION OF PLATFORM
           TECHNOLOGIES ACQUISITION AND LOWER THAN EXPECTED Q2 GROWTH

FREMONT, CALIFORNIA, June 12, 1997 -- ESS Technology, Inc. (Nasdaq:ESST) today
announced it has completed its previously-announced acquisition of Platform
Technologies, Inc. for 2.54 million shares of ESS common stock. The acquisition
is being accounted for as a purchase and will result in a charge against second
quarter earnings of approximately $0.64 per share for in-process research and
development. Completion is subject to acceptance of the agreement of merger by
the State of California. The acquisition of Platform Technologies has added to
ESS' development efforts in PCI-based audio solutions that provide DOS game
compatibility over the PCI bus and comply with Microsoft's PC'97, DirectX and
WDM standards and Intel's specifications of AC'97 and PCI 2.1.

        ESS also announced that, based on current information, it expects
second quarter revenues to only grow approximately 22 percent compared to
second quarter last year, primarily due to softer than anticipated seasonal
demand for audio products, especially in the add-in sound card market, and
competitive pricing pressures in the audio and video CD markets. ESS indicated
that, based on current information, it expects net sales for the second
quarter, ending June 30, 1997, to be between $56 and $61 million and earnings
to be between


                                     -more-

<PAGE>   2
ESS TECHNOLOGY, INC. ANNOUNCES COMPLETION OF PLATFORM...               PAGE 2

$0.16 and $0.19 per share before the one-time charge of $0.64 per share
resulting from the acquisition. 

        "We anticipated this quarter might be difficult, because of historic
slow seasonal demand and competitive price pressure and because it is a
transition quarter to our new products for the second half of the year," said
Fred Chan, CEO and chairman. "We are optimistic about the impact of our new
products going forward. All of our lines, including audio, video and
communications, have new products in production that will begin shipping in
June." 

        "The acquisition of Platform Technologies has strengthened our PCI
audio technology development efforts and puts us in a solid position for
advanced audio products. Our communications products are ramping up, and demand
for our video products remains strong."

ESS TECHNOLOGY

        ESS Technology, Inc. is a leading supplier of PC audio and digital
video semiconductor solutions for the PC and consumer markets. ESS designs,
develops, and markets highly integrated mixed signal semiconductor and software
solutions for multimedia applications. ESS, headquartered in Fremont,
California, has sales and technical support offices in Austin and Houston,
Texas; Irvine, California; Beijing and Shenzhen, China; Tokyo, Japan; Taipei,
Taiwan; and Hong Kong. ESS Technology is listed on the Nasdaq Market System
under the symbol ESST. World Wide Web site: http://www.esstech.com

                                      o0o

        The matters discussed in this news release include certain forward
looking statements that involve risks and uncertainties, including the timely
availability and acceptance of new products, the impact of competitive products
and pricing, the dependence on continued growth in demand for PC and consumer
multimedia products, the management of growth of the company, and the other
risk detailed from time to time in the SEC reports of ESS, including the report
on Form 10-K for the year ended December 31, 1996, and Form 10-Q for the
quarter ended March 31, 1997. Actual results could differ materially from those
projected in the forward-looking statements.


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission