STB SYSTEMS, INC.

                                 1,800,000 SHARES(1)

                                     COMMON STOCK


                               UNDERWRITING AGREEMENT

                                                              November __, 1996

HAMBRECHT & QUIST LLC
COWEN & COMPANY
  c/o Hambrecht & Quist LLC
One Bush Street
San Francisco, CA 94104

Ladies and Gentlemen:

     STB Systems, Inc., a Texas corporation (herein called the Company),
proposes to issue and sell  1,500,000 shares of its authorized but unissued
Common Stock, $.01 par value (herein called the Common Stock), and the
shareholders of the Company named in Schedule II hereto (herein collectively
called the Selling Securityholders) propose to sell an aggregate of 300,000
shares of Common Stock of the Company (said 1,800,000 shares of Common Stock
being herein called the Underwritten Stock). The Selling Securityholders propose
to grant to the Underwriters (as hereinafter defined) an option to purchase up
to 270,000 additional shares of Common Stock (herein called the Option Stock and
with the Underwritten Stock herein collectively called the Stock).  The Common
Stock is more fully described in the Registration Statement and the Prospectus
hereinafter mentioned.

     The Company and the Selling Securityholders severally hereby confirm the
agreements made with respect to the purchase of the Stock by the several
underwriters, for whom you are acting, named in Schedule I hereto (herein
collectively called the Underwriters, which term shall also include any
underwriter purchasing Stock pursuant to Section 3(b) hereof).  You represent
and warrant that you have been authorized by each of the other Underwriters to
enter into this Agreement on its behalf and to act for it in the manner herein
provided.

     1.   REGISTRATION STATEMENT.  The Company has filed with the Securities and
Exchange Commission (herein called the Commission) a registration statement on
Form S-1 (No. 333-14313), including the related preliminary prospectus, for the
registration under the Securities Act of 1933, as amended (herein called the
Securities Act) of the Stock.  Copies of such registration statement and of 

____________
   (1) Plus an option to purchase from the Selling Securityholders up to 
270,000 additional shares to cover over-allotments.




each amendment thereto, if any, including the related preliminary prospectus 
(meeting the requirements of Rule 430A of the rules and regulations of the 
Commission) heretofore filed by the Company with the Commission have been 
delivered to you.

     The term Registration Statement as used in this agreement shall mean such
registration statement, including all exhibits and financial statements, all
information omitted therefrom in reliance upon Rule 430A and contained in the
Prospectus referred to below, and any information deemed to be part thereof at
the time of effectiveness pursuant to Rule 434, in the form in which it became
effective, and any registration statement filed pursuant to Rule 462(b) of the
rules and regulations of the Commission with respect to the Stock (herein called
a Rule 462(b) registration statement), and, in the event of any amendment
thereto after the effective date of such registration statement (herein called
the Effective Date), shall also mean (from and after the effectiveness of such
amendment) such registration statement as so amended (including any Rule 462(b)
registration statement).  The term Prospectus as used in this Agreement shall
mean the prospectus (including any prospectus subject to completion meeting the
requirements of Rule 430(a) or 430A of the Commission provided by the Company
with any term sheet meeting the requirements of Rule 434(b)) relating to the
Stock first filed with the Commission pursuant to Rule 424(b) and Rule 430A (or
if no such filing is required, as included in the Registration Statement) and,
in the event of any supplement or amendment to such prospectus after the
Effective Date, shall also mean (from and after the filing with the Commission
of such supplement or the effectiveness of such amendment) such prospectus as so
supplemented or amended.  The term Preliminary Prospectus as used in this
Agreement shall mean each preliminary prospectus included in such registration
statement prior to the time it becomes effective.

     The Registration Statement has been declared effective under the Securities
Act, and no post-effective amendment to the Registration Statement has been
filed as of the date of this Agreement. The Company has caused to be delivered
to you copies of each Preliminary Prospectus and has consented to the use of
such copies for the purposes permitted by the Securities Act. 

     2.   REPRESENTATIONS AND WARRANTIES OF THE COMPANY AND THE SELLING
SECURITYHOLDERS.

     (a)  Each of the Company and William E. Ogle, a Selling Securityholder,
hereby represents and warrants as follows:

          (i)  Each of the Company and its subsidiaries has been duly 
     incorporated and is validly existing as a corporation in good standing 
     under the laws of the jurisdiction of its incorporation, has full power 
     and authority to own or lease its properties and conduct its business 
     as described in the Registration Statement and the Prospectus and as 
     being conducted, and is duly qualified as a foreign corporation and in 
     good standing in all jurisdictions in which the character of the 
     property owned or leased or the nature of the business transacted by it 
     makes qualification necessary (except where the failure to be so 
     qualified would not have a material adverse effect on the business, 
     properties, financial condition or results of operations of the Company 
     and its subsidiaries, taken as a whole).
     
          (ii) Since the respective dates as of which information is given 
     in the Registration Statement and the Prospectus, there has not been 
     any materially adverse change in the business, properties, financial 
     condition or results of operations of the Company and its subsidiaries, 
     taken as a whole, whether or not arising from transactions in the 
     ordinary course of business, other than as set forth in the 
     Registration Statement and the Prospectus, and since such dates, except 
     in the ordinary course of business, neither the Company nor any of its 
     subsidiaries has 

                                       -2-




entered into any material transaction not referred to in the Registration 
Statement and the Prospectus.

     (iii)     The Registration Statement and the Prospectus comply, in all 
material respects, with the provisions of the Securities Act and the rules 
and regulations of the Commission thereunder as in effect on the date hereof; 
on the Effective Date, the Registration Statement did not contain any untrue 
statement of a material fact and did not omit to state any material fact 
required to be stated therein or necessary in order to make the statements 
therein not misleading; and, on the Effective Date the Prospectus (including 
any supplement thereto required under Canadian provincial laws in connection 
with the offer and sale of the Stock in Canada) did not and, on the Closing 
Date and any later date on which Option Stock is to be purchased, will not 
contain any untrue statement of a material fact or omit to state any material 
fact necessary in order to make the statements therein, in the light of the 
circumstances under which they were made, not misleading; PROVIDED, HOWEVER, 
that none of the representations and warranties in this subparagraph (iii) 
shall apply to statements in, or omissions from, the Registration Statement 
or the Prospectus made in reliance upon and in conformity with information 
furnished in writing to the Company by or on behalf of the Underwriters 
through you or by a Selling Securityholder expressly for use in the 
Registration Statement or the Prospectus.

     (iv) Any term sheet and prospectus subject to completion provided by the 
Company to the Underwriters for use in connection with the offering and sale 
of the Stock pursuant to Rule 434 under the Securities Act together are not 
materially different from the prospectus included in the Registration 
Statement as filed with the Commission (exclusive of any information deemed 
to be a part thereof by virtue of Rule 434(d)).

     (v)  The Stock is duly and validly authorized, is (or, in the case of 
shares of the Stock to be sold by the Company, will be, when issued and sold 
to the Underwriters against payment therefor as provided herein) duly and 
validly issued, fully paid and nonassessable and conforms to the description 
thereof in the Prospectus.  No further approval or authority of the 
shareholders or the Board of Directors of the Company will be required for 
the transfer and sale of the Stock to be sold by the Selling Securityholders 
or the issuance and sale of the Stock as contemplated herein.

     (vi) The Stock to be sold by the Selling Securityholders is listed for 
trading on the Nasdaq National Market, and prior to the Closing Date the 
Stock to be issued and sold by the Company will be authorized for listing by 
the Nasdaq National Market upon official notice of issuance.

     (vii)     The Company and its subsidiaries have good and marketable 
title to all material personal property owned by them, in each case free and 
clear of all liens, encumbrances and defects except such as are described in 
the Prospectus or such as do not materially affect the value of such property 
and do not interfere with the use made and proposed to be made of such 
property by the Company and its subsidiaries; and all real property and 
buildings used in or necessary for the conduct of the business of the Company 
and its subsidiaries are held by them under valid, subsisting and enforceable 
leases with such exceptions as are not material and do not materially 
interfere with the use made and proposed to be made of such property and 
buildings by the Company and its subsidiaries.

                                       -3-




     (viii)    The Company has an authorized capitalization as set forth in 
the Prospectus, all of the outstanding shares of capital stock of the Company 
have been duly and validly authorized and issued, are fully paid and 
nonassessable and conform to the description thereof contained in the 
Prospectus and the number of issued and outstanding shares of Common Stock is 
as set forth in the Prospectus; all of the issued shares of capital stock of 
STB Assembly, Inc., a Texas corporation (herein called Assembly), STB de 
Mexico, S.A. (formerly known as Industrias Fronterizas de Chihuahua, S.A. de 
C.V.), a Mexican corporation (herein called IFC), and Maquilados 
Continentales de Ciudad Juarez, S.A. de C.V., a Mexican corporation (herein 
called MCCJ) (Assembly, IFC and MCCJ being the only subsidiaries of the 
Company and being referred to collectively herein as the subsidiaries), have 
been duly and validly authorized and issued, are fully paid and 
non-assessable and (except for one share of common stock of IFC, representing 
0.04% of the issued and outstanding capital stock of IFC) all the outstanding 
capital stock of Assembly, IFC and MCCJ are owned directly or indirectly by 
the Company, free and clear of all liens, encumbrances, equities or claims.

     (ix) The Company has full power and authority to enter into this 
Agreement and to issue, sell and deliver to the Underwriters the Stock to be 
sold by it hereunder, and this Agreement has been duly authorized, executed 
and delivered by the Company.

     (x)  The issue and sale by the Company to the Underwriters of the Stock 
to be sold by it hereunder and the compliance by the Company with all of the 
provisions of this Agreement and the consummation of the transactions herein 
contemplated will not conflict with or result in a breach or violation of any 
of the terms or provisions of, or constitute a default under, any indenture, 
mortgage, deed of trust, loan agreement, sale/leaseback agreement or other 
agreement or instrument to which the Company or any of its subsidiaries is a 
party or by which the Company or any of its subsidiaries is bound or to which 
any of the property or assets of the Company or any of its subsidiaries is 
subject, nor will such action result in any violation of the provisions of 
the Articles of Incorporation, as amended, or the Bylaws, as amended, of the 
Company or any statute or any order, rule or regulation of any court or 
government agency or body having jurisdiction over the Company or any of its 
subsidiaries or any of their properties; and no consent, approval, 
authorization, order, registration or qualification of or with any such court 
or governmental agency or body is required for the issue and sale of the 
Stock to be sold by the Company hereunder or the consummation by the Company 
of the transactions contemplated by this Agreement, except the registration 
under the Act of the Stock and such consents, approvals, authorizations, 
registrations or qualifications as may be required under state securities or 
Blue Sky laws or by the National Association of Securities Dealers, Inc. (the 
NASD) in connection with the purchase and distribution of the Stock by the 
Underwriters.

     (xi) Except for the litigation styled TEICH V. STB SYSTEMS, INC. ET AL., 
filed on or about September 6, 1995 in the Texas State District Court of 
Dallas County (Citation No. 95-9681-G), which has been fully disclosed to you 
prior to the date hereof and is accurately described in the Registration 
Statement and Prospectus, there are no legal or governmental proceedings 
pending to which the Company or any of its subsidiaries is a party or of 
which any property of the Company or any of its subsidiaries is the subject 
which, if determined adversely to the Company or any of its subsidiaries, 
would individually or in the aggregate have a material adverse effect on the 
consolidated financial position, shareholders' equity or results of 
operations of the Company and its subsidiaries, taken as a whole; and, to the 
best of the Company's knowledge, no such proceedings are threatened or 
contemplated by governmental authorities or threatened by others.

                                       -4-






     (xii)     Price Waterhouse, who have certified financial statements of 
the Company and its subsidiaries, are independent public accountants as 
required by the Act and the rules and regulations of the Commission 
thereunder.

     (xiii)    The pro forma financial information of the Company and its 
subsidiaries included in the Registration Statement and Prospectus presents 
fairly, in all material respects, the information shown therein, and the 
assumptions used in the preparation thereof are reasonable.

     (xiv)     The Company and its subsidiaries, taken as a whole, own, or 
possess adequate rights to use, all the patents, trademarks, service marks, 
trade names and copyrights (herein called Intellectual Property) necessary 
for the present and currently planned conduct of the business of the Company 
and its subsidiaries, taken as a whole.  To the best knowledge of the 
Company, there is no infringement on the Intellectual Property rights of the 
Company or its subsidiaries by others that could materially adversely affect 
the business or condition, financial or otherwise, of the Company and its 
subsidiaries, taken as a whole, and, to the best knowledge of the Company, 
none of the activities engaged in by the Company or any of its subsidiaries 
infringes or conflicts with Intellectual Property rights of others in a 
manner that could materially adversely affect the business or condition, 
financial or otherwise, of the Company and its subsidiaries, taken as a whole.

     (xv) No person has any right to require the Company to register any 
securities under the Securities Act and, except as disclosed in the 
Prospectus, no person has any option, preemptive right or other right to 
subscribe for or purchase any securities of the Company or of any subsidiary 
of the Company.

     (xvi)     The Company has provided or made available to you originals or 
complete and accurate copies of all agreements, contracts, corporate records, 
financial statements, business plans, product literature and other 
instruments and documents material to the business or operations of the 
Company and its subsidiaries, taken as a whole, and has responded fully to 
all requests for documents and information submitted to it by or for you, and 
the Company has provided or made available to you all updates of or 
supplements to any such document or information to the extent necessary to 
reflect new developments or additional information relevant thereto.

     (xvii)    Except as otherwise fully disclosed to you prior to the date 
hereof, the Company's results of operations during the fourth quarter of the 
fiscal year ended October 31, 1996 are consistent in all material respects 
with the anticipated results of operations for such quarter previously 
provided to you by the Company, and no aspect of such performance requires 
the modification or supplementation of any information contained in the 
Registration Statement or any Preliminary Prospectus.

     (xviii)   No officer, director, nominee for director or shareholder of 
the Company has any direct or indirect affiliation or association with any 
NASD member, except that Lawrence E. Wesneski, a director of the Company, is 
President and Chief Executive Officer and an equity owner of Hoak Breedlove 
Wesneski & Co. (HBW), which is a member of the NASD.  The Company's 
transactions and relationships with HBW and its predecessors are fully and 
accurately described in the Prospectus.

                                       -5-




     (xix)     Except as disclosed in the Prospectus, no person has the right 
to any payment (including without limitation any finder's fee) in connection 
with the offering or sale of the Stock.

     (xx) The Company has complied with all provisions of Section 517.075, 
Florida Statutes (Chapter 92-198, Laws of Florida).

(b)  Each of the Selling Securityholders hereby represents and warrants as 
follows:

     (i)  Such Selling Securityholder has good and marketable title to all 
the shares of Stock to be sold by such Selling Securityholder hereunder, free 
and clear of all liens, encumbrances, equities, security interests and claims 
whatsoever, with full right and authority to deliver the same pursuant to 
this Agreement and the Power of Attorney (as hereinafter defined), and that 
upon the delivery of and payment for such shares of the Stock hereunder, the 
several Underwriters will receive good and marketable title thereto, free and 
clear of all liens, encumbrances, equities, security interests and claims 
whatsoever.

     (ii) Such Selling Securityholder has full right, power and authority to 
enter into this Agreement and the Power of Attorney (as defined herein) and 
to sell, assign, transfer and deliver the Stock to be sold by such Selling 
Securityholder hereunder, and this Agreement and the Power of Attorney have 
each been duly executed and delivered by or on behalf of such Selling 
Securityholder and are the legal, valid and binding agreements of such 
Selling Securityholder, enforceable in accordance with their respective terms.

     (iii)     Such Selling Securityholder has granted a power of attorney 
(herein called the Power of Attorney) to William E. Ogle and Bryan F. Keyes 
(herein called the Attorneys-in-Fact) to purchase all requisite stock 
transfer tax stamps, to sign this Agreement, to agree on the price at which 
the shares of Stock being sold by such Selling Securityholder are to be sold 
to the Underwriters, to deliver and accept payment for such Stock on behalf 
of such Selling Securityholder, and to execute all instruments and documents, 
and to take all actions, necessary to carry out the provisions of this 
Agreement on behalf of such Selling Securityholder; prior to the date of this 
Agreement, each Selling Securityholder has delivered to the Attorneys-in-Fact 
a certificate or certificates in negotiable form evidencing the shares of 
Stock (including Option Stock) to be sold by such Selling Securityholder, to 
be held by the Attorneys-in-Fact until such time as the Attorneys-in-Fact 
shall deliver such shares of Stock to the Underwriters in accordance with 
this Agreement and the Power of Attorney or, if this Agreement is terminated 
prior to such delivery, shall return such shares of Stock to the Selling 
Securityholder.  Such Selling Securityholder specifically agrees that the 
shares of Stock represented by the certificates so held for such Selling 
Securityholder are subject to the interests of the several Underwriters and 
the Company, that the Power of Attorney is to that extent irrevocable, and 
that the obligations of such Selling Securityholder shall not be terminated 
by any act of such Selling Securityholder or by operation of law, whether by 
the death or incapacity of such Selling Securityholder or the occurrence of 
any other event; if any such death, incapacity or other such event should 
occur before the delivery of such shares of Stock hereunder, certificates for 
such shares of Stock shall be delivered by the Attorneys-in-Fact in 
accordance with the terms and conditions of this Agreement as if such death, 
incapacity or other event had not occurred, regardless of whether the 
Attorneys-in-Fact shall have received notice of such death, incapacity or 
other event.

                                       -6-




     (iv) All consents, approvals, authorizations and orders necessary for 
the execution and delivery by such Selling Securityholder of this Agreement 
and the Power of Attorney, and for the sale and delivery of the shares of 
Stock to be sold by such Selling Securityholder hereunder, have been 
obtained, and the sale of the shares of Stock to be sold by such Selling 
Securityholder hereunder and the compliance by such Selling Securityholder 
with all of the provisions of this Agreement and the Power of Attorney and 
the consummation of the transactions herein contemplated will not conflict 
with or result in a breach or violation of any of the terms or provisions of, 
or constitute a default under, any statute, any indenture, mortgage, deed of 
trust, loan agreement or other material agreement or instrument to which such 
Selling Securityholder is a party or by which such Selling Securityholder is 
bound or to which any of the property or assets of such Selling 
Securityholder is subject, or any order, rule or regulation of any court or 
governmental agency or body having jurisdiction over such Selling 
Securityholder or the property of such Selling Securityholder.

     (v)  Such Selling Securityholder has not taken and will not take, 
directly or indirectly, any action designed to cause or which might 
reasonably be expected to cause or result in, stabilization or manipulation 
of the price of the Common Stock.

     (vi) Such Selling Securityholder has not retained or dealt with any 
broker or finder, other than the Underwriters, with respect to the 
transactions contemplated hereby.

     (vii)     To the extent that any statements or omissions made in the 
Registration Statement, any Preliminary Prospectus, the Prospectus or any 
amendment or supplement thereto are made in reliance upon and in conformity 
with written information furnished to the Company by such Selling 
Securityholder expressly for use therein, such Preliminary Prospectus and the 
Registration Statement did, and the Prospectus and any further amendments or 
supplements to the Registration Statement and the Prospectus will, when they 
become effective or are filed with the Commission, as the case may be, 
conform in all material respects to the requirements of the Act and the rules 
and regulations of the Commission thereunder and not contain any untrue 
statement of a material fact or omit to state any material fact required to 
be stated therein or necessary to make the statements therein not misleading.

     (viii)    Except as set forth in the Prospectus, such Selling 
Securityholder does not own, beneficially or of record, and does not have any 
option, preemptive right or other right to subscribe for or purchase, or any 
claim against, any shares of capital stock or other securities of the Company 
or of any subsidiary of the Company; such Selling Securityholder has no right 
to require the Company to register under the Act any of the shares of Common 
Stock owned by him.

     (ix) Such Selling Securityholder has reviewed the Registration Statement 
and Prospectus and, although such Selling Securityholder has not 
independently verified the accuracy or completeness of all the information 
contained therein, nothing has come to the attention of such Selling 
Securityholder that would lead such Selling Securityholder to believe that:  
(A) on the Effective Date, the Registration Statement contained any untrue 
statement of a material fact or omitted to state any material fact required 
to be stated therein or necessary in order to make the statements therein not 
misleading; or (B) on the date of the Prospectus as set forth on the cover 
page thereof the Prospectus contained or, on the Closing Date and any later 
date on which Option Stock is to be purchased, will contain any untrue 
statement of a material fact or omitted or will omit to state any material 
fact necessary in order to make the 

                                       -7-





     statements therein, in the light of the circumstances under which they 
     were made, not misleading.

     3.   PURCHASE OF THE STOCK BY THE UNDERWRITERS.

     (a)  On the basis of the representations and warranties and subject to the
terms and conditions herein set forth, the Company agrees to issue and sell
1,500,000 shares of the Underwritten Stock to the several Underwriters, each
Selling Securityholder agrees to sell to the several Underwriters the number of
shares of the Underwritten Stock set forth in Schedule II opposite the name of
such Selling Securityholder, and each of the Underwriters agrees to purchase
from the Company and the Selling Securityholders the respective aggregate number
of shares of Underwritten Stock set forth opposite its name in Schedule I.  The
price at which such shares of Underwritten Stock shall be sold by the Company
and the Selling Securityholders and purchased by the several Underwriters shall
be $___ per share.  The obligation of each Underwriter to the Company and each
of the Selling Securityholders shall be to purchase from the Company and the
Selling Securityholders that number of shares of the Underwritten Stock which
represents the same proportion of the total number of shares of the Underwritten
Stock to be sold by each of the Company and the Selling Securityholders pursuant
to this Agreement as the number of shares of the Underwritten Stock set forth
opposite the name of such Underwriter in Schedule I hereto represents of the
total number of shares of the Underwritten Stock to be purchased by all
Underwriters pursuant to this Agreement, as adjusted by you in such manner as
you deem advisable to avoid fractional shares.  In making this Agreement, each
Underwriter is contracting severally and not jointly; except as provided in
paragraphs (b) and (c) of this Section 3, the agreement of each Underwriter is
to purchase only the respective number of shares of the Underwritten Stock
specified in Schedule I.

     (b)  If for any reason one or more of the Underwriters shall fail or 
refuse (otherwise than for a reason sufficient to justify the termination of 
this Agreement under the provisions of Section 8 or 9 hereof) to purchase and 
pay for the number of shares of the Stock agreed to be purchased by such 
Underwriter or Underwriters, the Company or the Selling Securityholders shall 
immediately give notice thereof to you, and the non-defaulting Underwriters 
shall have the right within 24 hours after the receipt by you of such notice 
to purchase, or procure one or more other Underwriters to purchase, in such 
proportions as may be agreed upon between you and such purchasing Underwriter 
or Underwriters and upon the terms herein set forth, all or any part of the 
shares of the Stock which such defaulting Underwriter or Underwriters agreed 
to purchase.  If the non-defaulting Underwriters fail so to make such 
arrangements with respect to all such shares and portion, the number of 
shares of the Stock which each non-defaulting Underwriter is otherwise 
obligated to purchase under this Agreement shall be automatically increased 
on a pro rata basis to absorb the remaining shares and portion which the 
defaulting Underwriter or Underwriters agreed to purchase; PROVIDED, HOWEVER, 
that the non-defaulting Underwriters shall not be obligated to purchase the 
shares and portion which the defaulting Underwriter or Underwriters agreed to 
purchase if the aggregate number of such shares of the Stock exceeds 10% of 
the total number of shares of the Stock which all Underwriters agreed to 
purchase hereunder.  If the total number of shares of the Stock which the 
defaulting Underwriter or Underwriters agreed to purchase shall not be 
purchased or absorbed in accordance with the two preceding sentences, the 
Company and the Selling Securityholders shall have the right, within 24 hours 
next succeeding the 24-hour period above referred to, to make arrangements 
with other underwriters or purchasers satisfactory to you for purchase of 
such shares and portion on the terms herein set forth.  In any such case, 
either you or the Company and the Selling Securityholders shall have the 
right to postpone the Closing Date determined as provided in Section 5 hereof 
for not more than seven business days after the date originally fixed as the 
Closing Date pursuant to said Section 5 in order that any necessary 

                                       -8-




changes in the Registration Statement, the Prospectus or any other documents 
or arrangements may be made. If neither the non-defaulting Underwriters nor 
the Company and the Selling Securityholders shall make arrangements within 
the 24-hour periods stated above for the purchase of all the shares of the 
Stock which the defaulting Underwriter or Underwriters agreed to purchase 
hereunder, this Agreement shall be terminated without further act or deed and 
without any liability on the part of the Company or the Selling 
Securityholders to any non-defaulting Underwriter and without any liability 
on the part of any non-defaulting Underwriter to the Company or the Selling 
Securityholders.  Nothing in this paragraph (b), and no action taken 
hereunder, shall relieve any defaulting Underwriter from liability in respect 
of any default of such Underwriter under this Agreement.

     (c)  On the basis of the representations, warranties and covenants herein
contained, and subject to the terms and conditions herein set forth, each of the
Selling Securityholders grants an option to the several Underwriters to
purchase, severally and not jointly, up to 90,000 shares in the aggregate of the
Option Stock from such Selling Securityholder at the same price per share as the
Underwriters shall pay for the Underwritten Stock.  Said option may be exercised
only to cover over-allotments in the sale of the Underwritten Stock by the
Underwriters and may be exercised in whole or in part at any time (but not more
than once) on or before the thirtieth day after the date of this Agreement upon
written or telegraphic notice by you to the Attorneys-in-Fact setting forth the
aggregate number of shares of the Option Stock as to which the several
Underwriters are exercising the option and the date on which such shares of the
Option Stock are to be delivered, as determined by you but in no event earlier
than the date that the Underwritten Stock is delivered hereunder.  Delivery of
certificates for the shares of Option Stock, and payment therefor, shall be made
as provided in Section 5 hereof.  The number of shares of the Option Stock to be
purchased by each Underwriter shall be the same percentage of the total number
of shares of the Option Stock to be purchased by the several Underwriters as
such Underwriter is purchasing of the Underwritten Stock, as adjusted by you in
such manner as you deem advisable to avoid fractional shares.  If the
Underwriters elect to purchase less than all 270,000 shares of Option Stock,
then one-third of the shares of Option Stock purchased by all the Underwriters
pursuant to such election shall be purchased from each of the Selling
Securityholders.

     4.   OFFERING BY UNDERWRITERS.

     (a)  The terms of the initial public offering by the Underwriters of the
Stock to be purchased by them hereunder shall be as set forth in the Prospectus.
The Underwriters may from time to time change the public offering price after
the closing of the initial public offering and increase or decrease the
concessions and discounts to dealers as they may determine.

     (b)  The information set forth in the last paragraph on the front cover
page, the last paragraph on the inside front cover page and under "Underwriting"
(excluding the last sentence of the sixth paragraph, regarding the Company's
indemnification of the Selling Securityholders) in the Registration Statement, 
in any Preliminary Prospectus and in the Prospectus relating to the Stock filed
by the Company (insofar as such information relates to the Underwriters) 
constitutes the only information furnished by the Underwriters to the Company 
for inclusion in the Registration Statement, any Preliminary Prospectus, and 
the Prospectus, and you on behalf of the respective Underwriters represent and 
warrant to the Company that the statements made therein are correct.

     5.   DELIVERY OF AND PAYMENT FOR THE STOCK.

     (a)  Delivery of certificates for the shares of the Underwritten Stock and
the Option Stock (if the option granted by Section 3(c) hereof shall have been
exercised not later than 9:00 A.M., Dallas time, on the date two business days
preceding the Closing Date), and payment therefor, shall be made 

                                       -9-





at the office of Thompson & Knight, A Professional Corporation, 1700 Pacific 
Avenue, Suite 3300, Dallas, Texas, at 9:00 a.m., Dallas time, on the fourth 
business day after the date of this Agreement, or at such time on such other 
day, not later than seven full business days after such fourth business day, 
as shall be agreed upon in writing by the Company, the Selling 
Securityholders and you.  The date and hour of such delivery and payment 
(which may be postponed as provided in Section 3(b) hereof) are herein called 
the Closing Date.

     (b)  If the option granted by Section 3(c) hereof shall be exercised after
9:00 a.m., Dallas time, on the date two business days preceding the Closing
Date, delivery of certificates for the shares of Option Stock, and payment
therefor, shall be made at the office of Thompson & Knight, A Professional
Corporation, 1700 Pacific Avenue, Suite 3300, Dallas, Texas, at 9:00 a.m.,
Dallas time, on the third business day after the exercise of such option.

     (c)  Payment for the Stock purchased from the Company shall be made to the
Company or its order, and payment for the Stock purchased from each Selling
Securityholder shall be made payable to such Selling Securityholder or his
order, but delivered to the Attorneys-in-Fact, for the account of the Selling
Securityholders, in each case by one or more certified or official bank check or
checks in same day funds.  Certificates for the Stock to be delivered to you
shall be registered in such name or names and shall be in such denominations as
you may request at least two business days before the Closing Date, in the case
of Underwritten Stock, and at least two business days prior to the purchase
thereof, in the case of the Option Stock.  Certificates for the Underwritten
Stock will be made available to the Underwriters for inspection, checking and
packaging at the offices of Lewco Securities Corporation, 2 Broadway, New York,
New York 10004 on the business day prior to the Closing Date, and certificates
for the Option Stock will be made available for such purpose at such address by
3:00 p.m., New York time, on the business day preceding the date of purchase.

     It is understood that you, individually and not on behalf of the
Underwriters, may (but shall not be obligated to) make payment to the Company
and the Selling Securityholders as stated above for shares to be purchased by
any Underwriter whose check shall not have been received by you on the Closing
Date or any later date on which Option Stock is purchased for the account of
such Underwriter.  Any such payment by you shall not relieve such Underwriter
from any of its obligations hereunder.

     6.   FURTHER AGREEMENTS OF THE COMPANY.  The Company covenants and agrees
as follows:

          (a)  The Company will (i) prepare and timely file with the 
     Commission under Rule 424(b) a Prospectus containing information 
     previously omitted at the time of effectiveness of the Registration 
     Statement in reliance on Rule 430A and (ii) file any amendment to the 
     Registration Statement or supplement to the Prospectus (including the 
     issuance or filing of any term sheet within the meaning of Rule 434) 
     only if (x) you shall previously have been advised and furnished with a 
     copy of such document, (y) you shall not have reasonably objected in 
     writing to the filing of such document and (z) such document is in 
     compliance with the Securities Act and the rules and regulations of the 
     Commission.

          (b)  The Company will promptly notify each Underwriter in the 
     event of (i) the request by the Commission for amendment of the 
     Registration Statement or for supplement to the Prospectus or for any 
     additional information, (ii) the issuance by the Commission of any stop 
     order suspending the effectiveness of the Registration Statement, (iii) 
     the institution or notice of intended institution of any action or 
     proceeding for that purpose, (iv) the receipt by the Company of any 
     notification with respect to the suspension of the qualification of the 
     Stock 

                                     -10-




for sale in any jurisdiction, or (v) the receipt by it of notice of the 
initiation or threatening of any proceeding for such purpose.  The Company 
will make every reasonable effort to prevent the issuance of such a stop 
order and, if such an order shall at any time be issued, to obtain the 
withdrawal thereof at the earliest possible moment.

     (c)  The Company (i) on or before the Closing Date, will deliver to you 
a signed copy of the Registration Statement as originally filed and of each 
amendment thereto filed prior to the time the Registration Statement becomes 
effective and, promptly upon the filing thereof, a signed copy of each 
post-effective amendment, if any, to the Registration Statement (together 
with, in each case, all exhibits thereto unless previously furnished to you) 
and will also deliver to you, for distribution to the Underwriters, a 
sufficient number of additional conformed copies of each of the foregoing 
(but without exhibits) so that one copy of each may be distributed to each 
Underwriter, (ii) as promptly as practicable, will deliver to you and send to 
the several Underwriters, at such office or offices as you may designate, as 
many copies of the Prospectus as you may reasonably request, and (iii) 
thereafter from time to time during the period in which a prospectus is 
required by law to be delivered by an Underwriter or dealer, likewise will 
send to the Underwriters as many additional copies of the Prospectus and as 
many copies of any supplement to the Prospectus and of any amended 
prospectus, filed by the Company with the Commission, as you may reasonably 
request for the purposes contemplated by the Securities Act.

     (d)  If at any time during the period in which a prospectus is required 
by law to be delivered by an Underwriter or dealer any event relating to or 
affecting the Company, or of which the Company shall be advised in writing by 
you, shall occur as a result of which it is necessary, in the opinion of 
counsel for the Company or of counsel for the Underwriters, to supplement or 
amend the Prospectus in order to make the Prospectus not misleading in the 
light of the circumstances existing at the time it is delivered to a 
purchaser of the Stock, the Company will forthwith prepare and file with the 
Commission a supplement to the Prospectus or an amended prospectus so that 
the Prospectus as so supplemented or amended will not contain any untrue 
statement of a material fact or omit to state any material fact necessary in 
order to make the statements therein, in the light of the circumstances 
existing at the time such Prospectus is delivered to such purchaser, not 
misleading.  If the Underwriters shall propose to vary the terms of the 
offering of the Stock by reason of changes in general market conditions or 
otherwise, you will advise the Company in writing of the proposed variation, 
and, if in the opinion either of counsel for the Company or of counsel for 
the Underwriters such proposed variation requires that the Prospectus be 
supplemented or amended, the Company will forthwith prepare and file with the 
Commission a supplement to the Prospectus or an amended prospectus setting 
forth such variation.  The Company authorizes the Underwriters and all 
dealers to whom any of the Stock may be sold by the several Underwriters to 
use the Prospectus, as from time to time amended or supplemented, in 
connection with the sale of the Stock in accordance with the applicable 
provisions of the Securities Act and the applicable rules and regulations 
thereunder for such period.

     (e)  Prior to the filing thereof with the Commission, the Company will 
submit to you, for your information, a copy of any post-effective amendment 
to the Registration Statement and any supplement to the Prospectus or any 
amended prospectus proposed to be filed.

     (f)  The Company will cooperate, when and as requested by you, in the 
qualification of the Stock for offer and sale under the securities or blue 
sky laws of such jurisdictions as you may designate and, during the period in 
which a prospectus is required by law to be delivered 

                                       -11-




by an Underwriter or dealer, in keeping such qualifications in good standing 
under said securities or blue sky laws; PROVIDED, HOWEVER, that the Company 
shall not be obligated to file any general consent to service of process or 
to qualify as a foreign corporation in any jurisdiction in which it is not so 
qualified.  The Company will, from time to time, prepare and file such 
statements, reports, and other documents as are or may be required to 
continue such qualifications in effect for so long a period as you may 
reasonably request for distribution of the Stock.

     (g)  During a period of two years commencing with the date hereof, the
Company will furnish to you, and to each Underwriter who may so request in
writing, copies of all periodic and special reports furnished to shareholders of
the Company and of all information, documents and reports filed with the
Commission.

     (h)  Not later than the 45th day following the end of the fiscal quarter
first occurring after the first anniversary of the Effective Date, the Company
will make generally available to its security holders an earning statement in
accordance with Section 11(a) of the Securities Act and Rule 158 thereunder.

     (i)  The Company agrees with the Underwriters to pay all costs and 
expenses incident to the performance of the Company's and the Selling 
Securityholders' obligations under this Agreement, including all costs and 
expenses incident to (i) the preparation, printing and filing with the 
Commission and the National Association of Securities Dealers, Inc. ("NASD") 
of the Registration Statement, any Preliminary Prospectus and the Prospectus, 
(ii) the furnishing to the Underwriters of copies of any Preliminary 
Prospectus and of the several documents required by paragraph (c) of this 
Section 6 to be so furnished, (iii) the copying of this Agreement and related 
documents delivered to the Underwriters, (iv) the preparation, printing and 
filing of all supplements and amendments to the Prospectus referred to in 
paragraph (d) of this Section 6, (v) the furnishing to you and the 
Underwriters of the reports and information referred to in paragraph (g) of 
this Section 6 and (vi) the printing and issuance of stock certificates, 
including the transfer agent's fees.  

     (j)  The Company agrees to reimburse you, for the account of the several
Underwriters, for state or Canadian provincial blue sky, registration or private
placement fees and related disbursements (including counsel fees and
disbursements and cost of copying memoranda for the Underwriters) paid by or for
the account of the Underwriters or their counsel in qualifying the Stock under
state or provincial securities or blue sky laws and in the review of the
offering by the NASD.

     (k)  The provisions of paragraphs (i) and (j) of this Section are intended
to relieve the Underwriters from the payment of the expenses and costs which the
Company hereby agrees to pay and shall not affect any agreement which the
Company and the Selling Securityholders may make, or may have made, for the
sharing of any such expenses and costs.  Without limiting the foregoing, all
fees and expenses of counsel for each Selling Securityholder and all
underwriters' discounts and commissions in respect of the sale of the Stock to
be sold hereunder by such Selling Securityholder shall be paid by such Selling
Securityholder.

     (l)  The Company and each of the Selling Securityholders hereby agrees
that, without the prior written consent of Hambrecht & Quist LLC on behalf of
the Underwriters, the Company or such Selling Securityholder, as the case may
be, will not, for a period of 90 

                                       -12-




     days following the commencement of the public offering of the Stock by 
     the Underwriters, directly or indirectly, (i) issue, sell, offer, 
     contract to sell, transfer the economic risk of ownership in, make any 
     short sale, pledge or otherwise transfer or dispose of any shares of 
     Common Stock or any securities convertible into or exchangeable or 
     exercisable for or any rights to purchase or acquire Common Stock, 
     whether any such transaction is to be settled by delivery of Common 
     Stock or such other securities, in cash or otherwise.  The foregoing 
     sentence shall not apply to (A) the Stock to be sold to the Underwriters 
     pursuant to this Agreement, (B) shares of Common Stock issued by the 
     Company upon the exercise of options granted under the stock option 
     plans of the Company (herein called the Option Plans) or pursuant to the 
     Company's 1995 Employee Stock Option Purchase Plan (herein called the 
     Employee Plan), all as described in footnote (2) to the table under the 
     caption "Capitalization" and under the caption "Management" in the 
     Preliminary Prospectus, and (C) options to purchase Common Stock granted 
     under the Option Plans or deemed granted under the Employee Plan.

     7.   INDEMNIFICATION AND CONTRIBUTION.

     (a)  Subject to the provisions of paragraph (f) of this Section 7, 
the Company and the Selling Securityholders jointly and severally agree 
to indemnify and hold harmless each Underwriter and each person 
(including each partner or officer thereof) who controls any Underwriter 
within the meaning of Section 15 of the Securities Act from and against 
any and all losses, claims, damages or liabilities, joint or several, to 
which such indemnified parties or any of them may become subject under 
the Securities Act, the Securities Exchange Act of 1934, as amended 
(herein called the Exchange Act), or the common law or otherwise, and 
the Company and the Selling Securityholders jointly and severally agree 
to reimburse each such Underwriter and controlling person for any legal 
or other expenses (including, except as otherwise hereinafter provided, 
reasonable fees and disbursements of counsel) incurred by the respective 
indemnified parties in connection with defending against any such 
losses, claims, damages or liabilities or in connection with any 
investigation or inquiry of, or other proceeding which may be brought 
against, the respective indemnified parties, in each case arising out of 
or based upon (i) any untrue statement or alleged untrue statement of a 
material fact contained in the Registration Statement (including the 
Prospectus as part thereof and any Rule 462(b) registration statement) 
or any post-effective amendment thereto (including any Rule 462(b) 
registration statement), or the omission or alleged omission to state 
therein a material fact required to be stated therein or necessary to 
make the statements therein not misleading, or (ii) any untrue statement 
or alleged untrue statement of a material fact contained in any 
Preliminary Prospectus or the Prospectus (as amended or as supplemented 
if the Company shall have filed with the Commission any amendment 
thereof or supplement thereto) or the omission or alleged omission to 
state therein a material fact necessary in order to make the statements 
therein, in the light of the circumstances under which they were made, 
not misleading; PROVIDED, HOWEVER, that (1) the indemnity agreements of 
the Company and the Selling Securityholders contained in this paragraph 
(a) shall not apply to any such losses, claims, damages, liabilities or 
expenses if such statement or omission was made in reliance upon and in 
conformity with information furnished as herein stated or otherwise 
furnished in writing to the Company by or on behalf of any Underwriter 
for use in any Preliminary Prospectus or the Registration Statement or 
the Prospectus or any such amendment thereof or supplement thereto; (2) 
the indemnity agreements of the Company and the Selling Securityholders 
contained in this paragraph (a) with respect to any Preliminary 
Prospectus shall not inure to the benefit of any Underwriter from whom 
the person asserting any such losses, claims, damages, liabilities or 
expenses purchased the Stock which is the subject thereof (or to the 
benefit of any person controlling such Underwriter) if at or prior to 
the written confirmation of the sale of such Stock a copy of the 
Prospectus (or the Prospectus as amended or supplemented) was not sent 
or delivered to such person and the untrue statement or omission of a 
material fact contained in such 

                                       -13-




Preliminary Prospectus was corrected in the Prospectus (or the 
Prospectus as amended or supplemented) unless the failure is the result 
of noncompliance by the Company with paragraph (c) of Section 6 hereof; 
and (3) each Selling Securityholder shall only be liable under this 
paragraph with respect to (A) information pertaining to such Selling 
Securityholder furnished by or on behalf of such Selling Securityholder 
expressly for use in any Preliminary Prospectus or the Registration 
Statement or the Prospectus or any such amendment thereof or supplement 
thereto or (B) facts that would constitute a breach of any 
representation or warranty of such Selling Securityholder set forth in 
Section 2 hereof.  The indemnity agreements of the Company and the 
Selling Securityholders contained in this paragraph (a) and the 
representations and warranties of the Company and the Selling 
Securityholders contained in Section 2 hereof shall remain operative and 
in full force and effect regardless of any investigation made by or on 
behalf of any indemnified party and shall survive the delivery of and 
payment for the Stock.

     (b)  Each Underwriter severally agrees to indemnify and hold 
harmless the Company, each of its officers who signs the Registration 
Statement on his own behalf or pursuant to a power of attorney, each of 
its directors, each other Underwriter and each person (including each 
partner or officer thereof) who controls the Company or any such other 
Underwriter within the meaning of Section 15 of the Securities Act, and 
each Selling Securityholder from and against any and all losses, claims, 
damages or liabilities, joint or several, to which such indemnified 
parties or any of them may become subject under the Securities Act, the 
Exchange Act, or the common law or otherwise and to reimburse each of 
them for any legal or other expenses (including, except as otherwise 
hereinafter provided, reasonable fees and disbursements of counsel) 
incurred by the respective indemnified parties in connection with 
defending against any such losses, claims, damages or liabilities or in 
connection with any investigation or inquiry of, or other proceeding 
which may be brought against, the respective indemnified parties, in 
each case arising out of or based upon (i) any untrue statement or 
alleged untrue statement of a material fact contained in the 
Registration Statement (including the Prospectus as part thereof and any 
Rule 462(b) registration statement) or any post-effective amendment 
thereto (including any Rule 462(b) registration statement) or the 
omission or alleged omission to state therein a material fact required 
to be stated therein or necessary to make the statements therein not 
misleading or (ii) any untrue statement or alleged untrue statement of a 
material fact contained in the Prospectus (as amended or as supplemented 
if the Company shall have filed with the Commission any amendment 
thereof or supplement thereto) or the omission or alleged omission to 
state therein a material fact necessary in order to make the statements 
therein, in the light of the circumstances under which they were made, 
not misleading, if (in the case of clause (i) or (ii)) such statement or 
omission was made in reliance upon and in conformity with information 
furnished as herein stated or otherwise furnished in writing to the 
Company by or on behalf of such indemnifying Underwriter for use in the 
Registration Statement or the Prospectus or any such amendment thereof 
or supplement thereto.  The indemnity agreement of each Underwriter 
contained in this paragraph (b) shall remain operative and in full force 
and effect regardless of any investigation made by or on behalf of any 
indemnified party and shall survive the delivery of and payment for the 
Stock.

     (c)  Each party indemnified under the provision of paragraphs (a) 
and (b) of this Section 7 agrees that, upon the service of a summons or 
other initial legal process upon it in any action or suit instituted 
against it or upon its receipt of written notification of the 
commencement of any investigation or inquiry of, or proceeding against, 
it in respect of which indemnity may be sought on account of any 
indemnity agreement contained in such paragraphs, it will promptly give 
written notice (herein called the Notice) of such service or 
notification to the party or parties from whom indemnification may be 
sought hereunder.  No indemnification provided for in such paragraphs 
shall be available to any party who shall fail so to give the Notice if 
the party to whom such Notice was not given was unaware of the action, 
suit, investigation, inquiry or proceeding to which the Notice would 
have related and was 

                                       -14-




prejudiced by the failure to give the Notice, but the omission so to notify 
such indemnifying party or parties of any such service or notification shall 
not relieve such indemnifying party or parties from any liability which it or 
they may have to the indemnified party for contribution or otherwise than on 
account of such indemnity agreement.  Any indemnifying party shall be 
entitled at its own expense to participate in the defense of any action, suit 
or proceeding against, or investigation or inquiry of, an indemnified party.  
Any indemnifying party shall be entitled, if it so elects within a reasonable 
time after receipt of the Notice by giving written notice (herein called the 
Notice of Defense) to the indemnified party, to assume (alone or in 
conjunction with any other indemnifying party or parties) the entire defense 
of such action, suit, investigation, inquiry or proceeding, in which event 
such defense shall be conducted, at the expense of the indemnifying party or 
parties, by counsel chosen by such indemnifying party or parties and 
reasonably satisfactory to the indemnified party or parties; PROVIDED, 
HOWEVER, that (i) if the indemnified party or parties reasonably determine 
that there may be a conflict between the positions of the indemnifying party 
or parties and of the indemnified party or parties in conducting the defense 
of such action, suit, investigation, inquiry or proceeding or that there may 
be legal defenses available to such indemnified party or parties different 
from or in addition to those available to the indemnifying party or parties, 
then counsel for the indemnified party or parties, upon written notice to the 
indemnifying parties, shall be entitled to conduct the defense to the extent 
reasonably determined by such counsel to be necessary to protect the 
interests of the indemnified party or parties and (ii) in any event, the 
indemnified party or parties shall be entitled to have counsel chosen by such 
indemnified party or parties participate in, but not conduct, the defense.  
If, within a reasonable time after receipt of the Notice, an indemnifying 
party gives a Notice of Defense and the counsel chosen by the indemnifying 
party or parties is reasonably satisfactory to the indemnified party or 
parties, the indemnifying party or parties will not be liable under 
paragraphs (a) through (c) of this Section 7 for any legal or other expenses 
subsequently incurred by the indemnified party or parties in connection with 
the defense of the action, suit, investigation, inquiry or proceeding, except 
that (A) the indemnifying party or parties shall bear the legal and other 
expenses incurred in connection with the conduct of the defense as referred 
to in clause (i) of the proviso to the preceding sentence and (B) the 
indemnifying party or parties shall bear such other expenses as it or they 
have authorized to be incurred by the indemnified party or parties.  If, 
within a reasonable time after receipt of the Notice, no Notice of Defense 
has been given, the indemnifying party or parties shall be responsible for 
any legal or other expenses incurred by the indemnified party or parties in 
connection with the defense of the action, suit, investigation, inquiry or 
proceeding.

     (d)  If the indemnification provided for in this Section 7 is 
unavailable or insufficient to hold harmless an indemnified party under 
paragraph (a) or (b) of this Section 7, then each indemnifying party, in lieu 
of indemnifying such indemnified party, shall contribute to the amount paid 
or payable by such indemnified party as a result of the losses, claims, 
damages or liabilities referred to in paragraph (a) or (b) of this Section 7 
(i) in such proportion as is appropriate to reflect the relative benefits 
received by each indemnifying party from the offering of the Stock or (ii) if 
the allocation provided by clause (i) above is not permitted by applicable 
law, in such proportion as is appropriate to reflect not only the relative 
benefits referred to in clause (i) above but also the relative fault of each 
indemnifying party in connection with the statements or omissions that 
resulted in such losses, claims, damages or liabilities, or actions in 
respect thereof, as well as any other relevant equitable considerations.  The 
relative benefits received by the Company and the Selling Securityholders on 
the one hand and the Underwriters on the other shall be deemed to be in the 
same respective proportions as the total net proceeds from the offering of 
the Stock received by the Company and the Selling Securityholders and the 
total underwriting discount received by the Underwriters, as set forth in the 
table on the cover page of the Prospectus, bear to the aggregate public 
offering price of the Stock. Relative fault shall be determined by reference 
to, among other things, whether the untrue or alleged 

                                      -15-




untrue statement of a material fact or the omission or alleged omission to 
state a material fact relates to information supplied by each indemnifying 
party and the parties' relative intent, knowledge, access to information and 
opportunity to correct or prevent such untrue statement or omission.  

     The parties agree that it would not be just and equitable if 
contributions pursuant to this paragraph (d) were to be determined by pro 
rata allocation (even if the Underwriters were treated as one entity for such 
purpose) or by any other method of allocation which does not take into 
account the equitable considerations referred to in the first sentence of 
this paragraph (d).  The amount paid by an indemnified party as a result of 
the losses, claims, damages or liabilities, or actions in respect thereof, 
referred to in the first sentence of this paragraph (d) shall be deemed to 
include any legal or other expenses reasonably incurred by such indemnified 
party in connection with investigation, preparing to defend or defending 
against any action or claim which is the subject of this paragraph (d). 
Notwithstanding the provisions of this paragraph (d), no Underwriter shall be 
required to contribute any amount in excess of the underwriting discount 
applicable to the Stock purchased by such Underwriter. No person guilty of 
fraudulent misrepresentation (within the meaning of Section 11(f) of the 
Securities Act) shall be entitled to contribution from any person who was not 
guilty of such fraudulent misrepresentation.  The Underwriters' obligations 
in this paragraph (d) to contribute are several in proportion to their 
respective underwriting obligations and not joint.  

     Each party entitled to contribution agrees that upon the service of a 
summons or other initial legal process upon it in any action instituted 
against it in respect of which contribution may be sought, it will promptly 
give written notice of such service to the party or parties from whom 
contribution may be sought, but the omission so to notify such party or 
parties of any such service shall not relieve the party from whom 
contribution may be sought from any obligation it may have hereunder or 
otherwise (except as specifically provided in paragraph (c) of this Section 
7).

     (e)  Neither the Company nor the Selling Securityholders will, without 
the prior written consent of each Underwriter, settle or compromise or 
consent to the entry of any judgment in any pending or threatened claim, 
action, suit or proceeding in respect of which indemnification may be sought 
hereunder (whether or not such Underwriter or any person who controls such 
Underwriter within the meaning of Section 15 of the Securities Act or Section 
20 of the Exchange Act is a party to such claim, action, suit or proceeding) 
unless such settlement, compromise or consent includes an unconditional 
release of such Underwriter party and each such controlling person from all 
liability arising out of such claim, action, suit or proceeding.

     (f)  The liability of each Selling Securityholder under such Selling 
Securityholder's representations and warranties contained in Section 2 hereof 
and under the indemnity and reimbursement agreements contained in the 
provisions of this Section 7 and Section 11 hereof shall be limited to an 
amount equal to the total net proceeds from the sale of the Stock sold by 
such Selling Securityholder to the Underwriters.  In addition, no Selling 
Securityholder shall be liable under the indemnity and reimbursement 
agreements of Sections 7 and 11 hereof unless and until the Underwriters have 
made written demand on the Company for payment under such Sections which 
shall not have been paid by the Company within 60 days after receipt of such 
demand.  The Company and the Selling Securityholders may agree, as among 
themselves and without limiting the rights of the Underwriters under this 
Agreement, as to the respective amounts of such liability for which they each 
shall be responsible.

     8.   TERMINATION.  This Agreement may be terminated by you at any time
prior to the Closing Date by giving written notice to the Company and the
Selling Securityholders if after the date 

                                       -16-




of this Agreement trading in the Common Stock shall have been suspended, or 
if there shall have occurred (i) the engagement in major hostilities or an 
escalation of major hostilities by the United States or the declaration of 
war or a national emergency by the United States on or after the date hereof, 
(ii) any outbreak of hostilities or other national or international calamity 
or crisis or change in economic or political conditions if the effect of such 
outbreak, calamity, crisis or change in economic or political conditions in 
the financial markets of the United States would, in the Underwriters' 
reasonable judgment, make the offering or delivery of the Stock 
impracticable, (iii) suspension of trading in securities generally or a 
material adverse decline in value of securities generally on the New York 
Stock Exchange, the American Stock Exchange, or The Nasdaq Stock Market, or 
limitations on prices (other than limitations on hours or numbers of days of 
trading) for securities on either such exchange or system, (iv) the 
enactment, publication, decree or other promulgation of any federal or state 
statute, regulation, rule or order of, or commencement of any proceeding or 
investigation by, any court, legislative body, agency or other governmental 
authority which in the Underwriters' reasonable opinion materially and 
adversely affects or will materially or adversely affect the business or 
operations of the Company, (v) declaration of a banking moratorium by either 
federal or New York State authorities or (vi) the taking of any action by any 
federal, state or local government or agency in respect of its monetary or 
fiscal affairs which in the Underwriters' reasonable opinion has a material 
adverse effect on the securities markets in the United States.  If this 
Agreement shall be terminated pursuant to this Section 8, there shall be no 
liability of the Company or the Selling Securityholders to the Underwriters 
and no liability of the Underwriters to the Company or the Selling 
Securityholders (in each case, including without limitation any liability for 
loss of anticipated profits); PROVIDED, HOWEVER, that in the event of any 
such termination the Company agrees to indemnify and hold harmless the 
Underwriters from all costs or expenses incident to the performance of the 
obligations of the Company and the Selling Securityholders under this 
Agreement, including all costs and expenses referred to in paragraphs (i) and 
(j) of Section 6 hereof.

     9.   CONDITIONS OF UNDERWRITERS' OBLIGATIONS.  The obligations of the
several Underwriters to purchase and pay for the Stock shall be subject to the
performance by the Company and by the Selling Securityholders of all their
respective obligations to be performed hereunder at or prior to the Closing Date
or any later date on which Option Stock is to be purchased, as the case may be,
and to the following further conditions:

          (a)  The Registration Statement shall have become effective; and 
     no stop order suspending the effectiveness thereof shall have been 
     issued and no proceedings therefor shall be pending or threatened by 
     the Commission.

          (b)  The legality and sufficiency of the sale of the Stock 
     hereunder and the validity and form of the certificates representing 
     the Stock, all corporate proceedings and other legal matters incident 
     to the foregoing, and the form of the Registration Statement and of the 
     Prospectus (except as to the financial statements contained therein), 
     shall have been approved at or prior to the Closing Date by Thompson & 
     Knight, A Professional Corporation, counsel for the Underwriters.
     
          (c)  You shall have received from Locke Purnell Rain Harrell (A 
     Professional Corporation), counsel for the Company; Lic. Jose Reyes 
     Ferring, Mexican counsel for the Company; and Joe French & Associates, 
     P.C., counsel for the Selling Securityholders, opinions addressed to 
     the Underwriters and dated the Closing Date, covering the matters set 
     forth in Annexes A, B and C hereto, respectively, and if Option Stock is
     purchased at any date after the Closing Date, additional opinions from 
     each such counsel, addressed to the Underwriters and 

                                       -17-




dated such later date, confirming that the statements 
expressed as of the Closing Date in such opinions remain valid as of such 
later date.

     (d)  You shall be satisfied that (i) as of the Effective Date, the 
statements made in the Registration Statement and the Prospectus were true 
and correct, the Registration Statement did not contain any untrue statement 
of a material fact and did not omit to state any material fact required to be 
stated therein or necessary in order to make the statements therein not 
misleading and the Prospectus did not contain any untrue statement of a 
material fact or omit to state any material fact necessary in order to make 
the statements therein, in light of the circumstances under which they were 
made, not misleading, (ii) since the Effective Date, no event has occurred 
which, in the opinion of counsel to the Company or counsel to the 
Underwriters, should have been set forth in a supplement or amendment to the 
Prospectus which has not been set forth in such a supplement or amendment, 
(iii) since the respective dates as of which information is given in the 
Registration Statement in the form in which it originally became effective 
and the Prospectus contained therein, there has not been any material adverse 
change or any development involving a prospective material adverse change in 
or affecting the business, properties, financial condition or results of 
operations of the Company and its subsidiaries, taken as a whole, whether or 
not arising from transactions in the ordinary course of business, and, since 
such dates, except in the ordinary course of business, neither the Company 
nor any of its subsidiaries has entered into any material transaction not 
referred to in the Registration Statement in the form in which it originally 
became effective and the Prospectus contained therein, (iv) neither the 
Company nor any of its subsidiaries has any material contingent obligations 
which are not disclosed in the Registration Statement and the Prospectus, (v) 
there are not any pending or known threatened legal proceedings to which the 
Company or any of its subsidiaries is a party or of which property of the 
Company or any of its subsidiaries is the subject which are material and 
which are not disclosed in the Registration Statement and the Prospectus, 
(vi) the representations and warranties of the Company and the Selling 
Securityholders herein are true and correct in all material respects as of 
the Closing Date or any later date on which Option Stock is to be purchased, 
as the case may be, and (vii) there has not occurred any event specified in 
the first sentence of Section 8 which, in your reasonable judgment, makes it 
impracticable to make a public offering of the Stock.

     (e)  You shall have received on the Closing Date and on any later date 
on which Option Stock is purchased a certificate, dated the Closing Date or 
such later date, as the case may be, and signed by the President and the 
Chief Financial Officer of the Company, stating that the respective signers 
of said certificate have carefully examined the Registration Statement in the 
form in which it originally became effective and the Prospectus contained 
therein and any supplements or amendments thereto, and that the statements 
included in clauses (i) through (vii) of paragraph (d) of this Section 9 are 
true and correct.

     (f)  You shall have received from Price Waterhouse LLP, a letter or 
letters, addressed to the Underwriters and dated the Closing Date and any 
later date on which Option Stock is purchased, confirming that they are 
independent public accountants with respect to the Company within the meaning 
of the Securities Act and the applicable published rules and regulations 
thereunder and based upon the procedures described in their letter delivered 
to you concurrently with the execution of this Agreement (herein called the 
Original Letter), but carried out to a date not more than three business days 
prior to the Closing Date or such later date on which Option Stock is 
purchased (i) confirming, to the extent true, that the statements and 
conclusions set forth in the Original Letter are accurate as of the Closing 
Date or such later date, as the case may be, and (ii) setting forth any 
revisions and additions to the statements and 

                                       -18-




     conclusions set forth in the Original Letter which are necessary to 
     reflect any changes in the facts described in the Original Letter since 
     the date of the Original Letter or to reflect the availability of more 
     recent financial statements, data or information.  The letters shall 
     not disclose any change, or any development involving a prospective 
     change, in or affecting the business or properties of the Company or 
     any of its subsidiaries which, in your sole reasonable judgment, makes 
     it impractical or inadvisable to proceed with the public offering of 
     the Stock or the purchase of the Option Stock as contemplated by the 
     Prospectus.
     
          (g)  You shall have been furnished evidence in usual written or 
     telegraphic form from the appropriate authorities of the several 
     jurisdictions, or other evidence satisfactory to you, of the 
     qualification referred to in paragraph (f) of Section 6 hereof.

          (h)  Prior to the Closing Date, the Stock to be issued and sold by 
     the Company shall have been duly authorized for listing by the Nasdaq 
     National Market upon official notice of issuance.
     
          (i)  On or prior to the Closing Date, you shall have received from 
     all directors and executive officers of the Company agreements, in form 
     reasonably satisfactory to Hambrecht & Quist LLC, stating that without 
     the prior written consent of Hambrecht & Quist LLC on behalf of the 
     Underwriters, such person will not, for a period of 90 days following 
     the commencement of the public offering of the Stock by the 
     Underwriters, directly or indirectly, sell, offer, contract to sell, 
     transfer the economic risk of ownership in, make any short sale, pledge 
     or otherwise transfer or dispose of any shares of Common Stock or any 
     securities convertible into or exchangeable or exercisable for or any 
     rights to purchase or acquire Common Stock.
     
     All the agreements, opinions, certificates and letters mentioned above 
or elsewhere in this Agreement shall be deemed to be in compliance with the 
provisions hereof only if Thompson & Knight, A Professional Corporation, 
counsel for the Underwriters, shall be satisfied that they comply in form and 
scope.

     In case any of the conditions specified in this Section 9 shall not be 
fulfilled, this Agreement may be terminated by you by giving written notice 
to the Company and to the Selling Securityholders.  Any such termination 
shall be without liability of the Company or the Selling Securityholders to 
the Underwriters and without liability of the Underwriters to the Company or 
the Selling Securityholders (in each case, including without limitation any 
liability for loss of anticipated profits); PROVIDED, HOWEVER, that (i) in 
the event of such termination, the Company agrees to indemnify and hold 
harmless the Underwriters from all costs or expenses incident to the 
performance of the obligations of the Company and the Selling Securityholders 
under this Agreement, including all costs and expenses referred to in 
paragraphs (i) and (j) of Section 6 hereof, and (ii) if this Agreement is 
terminated by you because of any refusal, inability or failure on the part of 
the Company or the Selling Securityholders to perform any agreement herein, 
to fulfill any of the conditions herein, or to comply with any provision 
hereof other than by reason of a default by any of the Underwriters, the 
Company will reimburse the Underwriters severally upon demand for all 
out-of-pocket expenses (including reasonable fees and disbursements of 
counsel) that shall have been incurred by them in connection with the 
transactions contemplated hereby.

                                       -19-




     10.  CONDITIONS OF THE OBLIGATION OF THE COMPANY AND THE SELLING 
SECURITYHOLDERS.  The obligation of the Company and the Selling 
Securityholders to deliver the Stock shall be subject to the conditions that 
(a) the Registration Statement shall have become effective and (b) no stop 
order suspending the effectiveness thereof shall be in effect and no 
proceedings therefor shall be pending or threatened by the Commission.

     In case either of the conditions specified in this Section 10 shall not 
be fulfilled, this Agreement may be terminated by the Company and the Selling 
Securityholders by giving written notice to you. Any such termination shall 
be without liability of the Company and the Selling Securityholders to the 
Underwriters and without liability of the Underwriters to the Company or the 
Selling Securityholders (in each case, including without limitation any 
liability for loss of anticipated profits); PROVIDED, HOWEVER, that in the 
event of any such termination the Company agrees to indemnify and hold 
harmless the Underwriters from all costs or expenses incident to the 
performance of the obligations of the Company and the Selling Securityholders 
under this Agreement, including all costs and expenses referred to in 
paragraphs (i) and (j) of Section 6 hereof.

     11.  REIMBURSEMENT OF CERTAIN EXPENSES.  In addition to their other 
obligations under Section 7 of this Agreement (and subject, in the case of a 
Selling Securityholder, to the provisions of paragraph (f) of Section 7), the 
Company and the Selling Securityholders hereby jointly and severally agree to 
reimburse on a quarterly basis the Underwriters for all reasonable legal and 
other expenses incurred in connection with investigating or defending any 
claim, action, investigation, inquiry or other proceeding arising out of or 
based upon any statement or omission, or any alleged statement or omission, 
described in paragraph (a) of Section 7 of this Agreement and in respect of 
which the Underwriters have given to the Company or the Selling 
Securityholders any Notice required by Section 7(c) (and provided the 
Underwriters would be entitled to conduct the investigation or defense 
thereof pursuant to Section 7(c)), notwithstanding the absence of a judicial 
determination as to the propriety and enforceability of the obligations under 
this Section 11 and the possibility that such payments might later be held to 
be improper; PROVIDED, HOWEVER, that (i) to the extent any such payment is 
ultimately held to be improper, the persons receiving such payments shall 
promptly refund them and (ii) such persons shall provide to the Company, upon 
request, reasonable assurances of their ability to effect any refund, when 
and if due.

     12.  PERSONS ENTITLED TO BENEFIT OF AGREEMENT.  This Agreement shall 
inure to the benefit of the Company, the Selling Securityholders and the 
several Underwriters and, with respect to the provisions of Section 7 hereof, 
the several parties (in addition to the Company, the Selling Securityholders 
and the several Underwriters) indemnified under the provisions of said 
Section 7, and their respective personal representatives, successors and 
assigns.  Nothing in this Agreement is intended or shall be construed to give 
to any other person, firm or corporation any legal or equitable remedy or 
claim under or in respect of this Agreement or any provision herein 
contained.  The term "successors and assigns" as herein used shall not 
include any purchaser, as such purchaser, of any of the Stock from any of the 
several Underwriters.

     13.  NOTICES.  Except as otherwise provided herein, all communications 
hereunder shall be in writing or by facsimile and, if to the Underwriters, 
shall be mailed, transmitted by facsimile or delivered to Hambrecht & Quist 
LLC, One Bush Street, San Francisco, California 94104; and if to the Company, 
shall be mailed, transmitted by facsimile or delivered to it at its office, 
1651 North Glenville Drive, Richardson, Texas 75081, Attention: Chief 
Executive Officer; and if to the Selling Securityholders, shall be mailed, 
transmitted by facsimile or delivered to the Selling Securityholders in care 
of William E. Ogle and Bryan F. Keyes, Attorneys-in-Fact, at the Company's 
address at such

                                     -20-



office. Notwithstanding the foregoing, any notice delivered to a Selling 
Securityholder, as an indemnifying or indemnified party, after the Closing 
Date in accordance with Section 7 shall be addressed and delivered to such 
Selling Securityholder at the Company's address as specified in this 
paragraph, rather than to the Attorneys-in-Fact.  All notices given by 
facsimile shall be promptly confirmed by letter.

     14.  MISCELLANEOUS.  The reimbursement, indemnification and contribution
agreements contained in this Agreement and the representations, warranties and
covenants in this Agreement shall remain in full force and effect regardless of
(a) any termination of this Agreement, (b) any investigation made by or on
behalf of any Underwriter or controlling person thereof, or by or on behalf of
the Company or the Selling Securityholders or their respective directors or
officers, and (c) delivery and payment for the Stock under this Agreement;
PROVIDED, HOWEVER, that if this Agreement is terminated prior to the Closing
Date, the provisions of paragraph (l) of Section 6 hereof shall be of no further
force or effect.

     This Agreement may be executed in two or more counterparts, each of which
shall be deemed an original, but all of which together shall constitute one and
the same instrument.

     This Agreement shall be governed by, and construed in accordance with, the
laws of the State of California.





                                     -21-



     Please sign and return to the Company and to the Selling Securityholders 
in care of the Company the enclosed duplicates of this letter, whereupon this 
letter will become a binding agreement among the Company, the Selling 
Securityholders and the several Underwriters in accordance with its terms.

                                      Very truly yours,

                                      STB SYSTEMS, INC.



                                      By
                                        ----------------------------------------
                                        William E. Ogle, Chief Executive Officer
                                            and Chairman of the Board



                                      SELLING SECURITYHOLDERS:

                                      WILLIAM E. OGLE
                                      WILLIAM D. BALTHASER, JR.
                                      MARK S. SIMS



                                      By
                                        ----------------------------------------
                                        William E. Ogle, Individually and as
                                            Attorney-in-Fact acting on 
                                            behalf of each of the other 
                                            Selling Securityholders



The foregoing Agreement is hereby confirmed
and accepted as of the date first above written.

HAMBRECHT & QUIST LLC
COWEN & COMPANY
     By Hambrecht & Quist LLC



By
  ----------------------------------------------
               , Managing Director,
      Acting on behalf of the several Underwriters,
      including themselves, named in Schedule I hereto.

                                     -22-



                                  SCHEDULE I

                                 UNDERWRITERS

                                                              NUMBER OF
                                                              SHARES OF
                                                            UNDERWRITTEN
                                                             STOCK TO BE
     UNDERWRITERS                                             PURCHASED
     ------------                                           ------------

Hambrecht & Quist LLC.....................................              

Cowen & Company...........................................              




                                                            ------------
     Total................................................   1,800,000
                                                            ------------
                                                            ------------




                                  SCHEDULE II

                            SELLING SECURITYHOLDERS






                                                  NUMBER OF     NUMBER OF SHARES
                                                  SHARES OF      OF OPTION STOCK
                                                UNDERWRITTEN      TO BE SOLD IF
                                                 STOCK TO BE     MAXIMUM OPTION
     NAME OF SELLING SECURITYHOLDER                 SOLD           EXERCISED
     ------------------------------             ------------    ----------------

William E. Ogle...........................         100,000            90,000
William D. Balthaser, Jr..................         100,000            90,000
Mark S. Sims..............................         100,000            90,000

                                                ------------    ----------------
     Total................................         300,000           270,000
                                                ------------    ----------------
                                                ------------    ----------------


                                    ANNEX A

                    MATTERS TO BE COVERED IN THE OPINION OF
            LOCKE PURNELL RAIN HARRELL (A PROFESSIONAL CORPORATION),
                            COUNSEL FOR THE COMPANY

     (i)    the Company has been duly incorporated and is validly existing as 
a corporation in good standing under the laws of the State of Texas and has 
full power and authority to own or lease its properties and conduct its 
business as described in the Registration Statement;

     (ii)   the Company has no subsidiaries other than Assembly, IFC and 
MCCJ; Assembly has been duly incorporated and is validly existing as a 
corporation in good standing under the laws of its jurisdiction of 
incorporation; all of the issued shares of capital stock of Assembly have 
been duly and validly authorized and issued, are fully paid and 
nonassessable, and such shares are owned directly by the Company, free and 
clear of all liens, encumbrances, equities or claims; and to the best of such 
counsel's knowledge, no options, warrants or other rights to purchase, 
agreements or other obligations to issue or other rights to convert any 
obligations into shares of capital stock or ownership interests in Assembly 
are outstanding;

     (iii)  the authorized capital stock of the Company and the number of 
issued and outstanding shares of such capital stock is as set forth under the 
caption "Capitalization" in the Prospectus; proper corporate proceedings have 
been taken validly to authorize such authorized capital stock; all of the 
outstanding shares of such capital stock (including the shares of Stock, when 
issued and paid for by the Underwriters) have been duly and validly issued 
and are fully paid and nonassessable; and no preemptive rights of, or rights 
of refusal in favor of, shareholders exist with respect to the Stock, or the 
issue and sale thereof, pursuant to the Articles of Incorporation or Bylaws 
of the Company and, to the knowledge of such counsel, there are no 
contractual preemptive rights, rights of first refusal or rights of co-sale 
which exist and have not been waived with respect to the Stock being sold by 
the Selling Securityholders or the issue and sale of the Stock;

     (iv)   the Registration Statement has become effective under the 
Securities Act and, to the best of such counsel's knowledge, no stop order 
suspending the effectiveness of the Registration Statement or suspending or 
preventing the use of the Prospectus is in effect and no proceedings for that 
purpose have been instituted or are pending or contemplated by the Commission;

     (v)    the Registration Statement and the Prospectus (except as to the 
financial statements and schedules and other financial data contained 
therein, as to which such counsel need express no opinion) comply as to form 
in all material respects with the requirements of the Securities Act and with 
the rules and regulations of the Commission thereunder;

     (vi)   the information required to be set forth in the Registration 
Statement in answer to Item 10 (insofar as it relates to such counsel) and 
Items 9 and 11(c) (insofar as such information constitutes a summary of legal 
matters) of Form S-1 is to the best of such counsel's knowledge accurately 
and adequately set forth therein in all material respects or no response is 
required with respect to such Items;

     (vii)  such counsel do not know of any franchises, contracts, leases, 
documents or legal proceedings, pending or threatened, which in the opinion 
of such counsel are of a character



required to be described in the Registration Statement or the Prospectus or 
to be filed as exhibits to the Registration Statement, which are not 
described and filed (or incorporated by reference) as required;

     (viii) the Underwriting Agreement has been duly authorized, executed and 
delivered by the Company and is the legal, valid and binding agreement of the 
Company enforceable in accordance with its terms (except to the extent the 
enforceability of the indemnification and contribution provisions of Section 
7 of the Underwriting Agreement may be limited by federal or state securities 
laws or by public policy considerations as expressed in such laws as 
construed by courts of competent jurisdiction, and except as enforceability 
may be limited by bankruptcy, insolvency, reorganization, moratorium and 
other laws affecting creditors' rights generally and by general principles of 
equity);

     (ix)   the issue and sale by the Company of the shares of Stock sold by 
the Company as contemplated by the Underwriting Agreement will not conflict 
with, or result in a breach of, the Articles of Incorporation or Bylaws of 
the Company or any of its subsidiaries or any agreement or instrument known 
to such counsel to which the Company or any of its subsidiaries is a party or 
any applicable law or regulation (assuming compliance with the securities 
registration and qualification requirements under applicable state securities 
or blue sky laws), or so far as is known to such counsel, any order, writ, 
injunction or decree, of any jurisdiction, court or governmental 
instrumentality;

     (x)    to the best of such counsel's knowledge, no holders of securities 
of the Company have any rights to the registration of shares of Common Stock, 
or other securities, because of the filing of the Registration Statement by 
the Company;

     (xi)   no consent, approval, authorization or order of any court or 
governmental agency or body is required for the consummation by the Company 
of the transactions contemplated in the Underwriting Agreement, except such 
as have been obtained under the Securities Act and such as may be required 
under state securities or blue sky laws or by the National Association of 
Securities Dealers, Inc. in connection with the purchase and distribution of 
the Stock by the Underwriters;

     (xii)  such counsel have no reason to believe that the Registration 
Statement or the Prospectus (A) contains any untrue statement of a material 
fact with respect to patents, trade secrets, trademarks, service marks or 
other proprietary information or materials (herein called Intellectual 
Property) owned or used by the Company, or the manner of its use thereof, or 
(B) omits to state any material fact relating to Intellectual Property owned 
or used by the Company, or the manner of its use thereof, that is required to 
be stated in the Registration Statement or the Prospectus or is necessary to 
make the statements therein not misleading; and

     (xiii) to the best of such counsel's knowledge, there are no pending or 
threatened legal or governmental proceedings or infringement claims relating 
to Intellectual Property owned or used by the Company. 


                    ____________________________________



     In addition to the matters set forth above, counsel rendering the 
foregoing opinion shall also include a statement to the effect that nothing 
has come to the attention of such counsel that leads them to believe that the 
Registration Statement (except as to the financial statements and schedules 
and other financial and statistical data contained or incorporated by 
reference therein, as to which such counsel need not express any opinion or 
belief) at the Effective Date contained any untrue statement of a material 
fact or omitted to state a material fact required to be stated therein or 
necessary to make the statements therein not misleading, that the Prospectus 
(except as to the financial statements and schedules and other financial and 
statistical data contained or incorporated by reference therein, as to which 
such counsel need not express any opinion or belief) as of its date or at the 
Closing Date (or any later date on which Option Stock is purchased), 
contained or contains any untrue statement of a material fact or omitted or 
omits to state a material fact necessary in order to make the statements 
therein, in light of the circumstances under which they were made, not 
misleading.



                                     ANNEX B

                    MATTERS TO BE COVERED IN THE OPINION OF
                            LIC. JOSE REYES FERRING,
                         MEXICAN COUNSEL FOR THE COMPANY


     (i)    each of IFC and MCCJ has been duly incorporated and is validly 
existing as a corporation in good standing under the laws of its jurisdiction 
of incorporation; and

     (ii)   all of the issued shares of capital stock of IFC and MCCJ have 
been duly and validly authorized and issued, are fully paid and 
nonassessable, and (except for one share of common stock of IFC, representing 
0.04% of the issued and outstanding capital stock of IFC) all the outstanding 
shares of capital stock of IFC and MCCJ are owned directly or indirectly by 
the Company, free and clear of all liens, encumbrances, equities or claims.



                                     ANNEX C

                   MATTERS TO BE COVERED IN THE OPINION OF
                         JOE FRENCH & ASSOCIATES, P.C.,
                   COUNSEL FOR THE SELLING SECURITYHOLDERS


     (i)    the Power of Attorney has been duly executed and delivered by 
each Selling Securityholder and constitutes a valid and binding agreement of 
such Selling Securityholder enforceable in accordance with its terms (except 
as enforceability may be limited by bankruptcy, insolvency, moratorium and 
other laws affecting creditors' rights generally and by general principles of 
equity);

     (ii)   the Underwriting Agreement has been duly executed and delivered 
by or on behalf of each Selling Securityholder and is the legal, valid and 
binding agreement of such Selling Securityholder enforceable in accordance 
with its terms (except to the extent the enforceability of the 
indemnification provisions of Section 7 of the Underwriting Agreement may be 
limited by public policy considerations as expressed in the Act as construed 
by courts of competent jurisdiction, and except as enforceability may be 
limited by bankruptcy, insolvency, moratorium and other laws affecting 
creditors' rights generally and by general principles of equity); and the 
sale of the Stock to be sold by such Selling Securityholder hereunder and the 
compliance by such Selling Securityholder with all of the provisions of the 
Underwriting Agreement and the Power of Attorney and the consummation of the 
transactions therein contemplated will not (a) conflict with the laws of the 
State of Texas or the federal laws of the United States by which such Selling 
Securityholder is bound, or (b) result in a breach or violation of any order, 
rule or regulation known to such counsel of any court or governmental agency 
or body which, to such counsel's knowledge, has jurisdiction over such 
Selling Securityholder or the Common Stock of such Selling Securityholder;

     (iii)  no consent, approval, authorization or order of any court or 
governmental agency or body is required for the consummation of the 
transactions contemplated by the Underwriting Agreement in connection with 
the Stock to be sold by such Selling Securityholder hereunder, except such as 
have been obtained under the Act and such as may be required by the NASD or 
under state securities or Blue Sky laws in connection with the purchase and 
distribution of such Stock by the Underwriters; 

     (iv)   each Selling Securityholder is the sole record and beneficial 
owner of the Stock to be sold by such Selling Securityholder pursuant to the 
Underwriting Agreement; upon delivery of the Stock to be sold by such Selling 
Securityholder thereunder, the Underwriters who purchase and pay for such 
Stock will obtain good, valid and marketable title to such Stock, free of all 
adverse claims, assuming the Underwriters purchase such Stock in good faith 
and without notice of any such adverse claim within the meaning of the 
Uniform Commercial Code; and

     (v)    except as set forth in the Prospectus, and to the best knowledge 
of such counsel, none of the Selling Securityholders owns, beneficially or of 
record, nor does any Selling Securityholder have any option granted by the 
Company, preemptive right or other right to subscribe for or purchase from 
the Company, or any claim against, any shares of capital stock or other 
securities of the Company or of any subsidiary of the Company; and none of 
the Selling Securityholders has any right to require the Company to register 
under the Act any of the shares of Common Stock owned by him.