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Sample Business Contracts

Underwriting Agreement - 3dfx Interactive Inc.

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                              2,300,000 SHARES(1)

                             3DFX INTERACTIVE, INC.

                                  COMMON STOCK


                             UNDERWRITING AGREEMENT

                                                           _______________, 1998


BANCAMERICA ROBERTSON STEPHENS
NATIONSBANC MONTGOMERY SECURITIES LLC
UBS SECURITIES LLC
  As Representatives of the several Underwriters
c/o Robertson, Stephens & Company LLC
555 California Street
Suite 2600
San Francisco, California  94104

Ladies/Gentlemen:

      3Dfx Interactive, Inc., a California corporation (the "Company"), and
certain shareholders of the Company named in Schedule B hereto (hereafter called
the "Selling Shareholders") address you as the Representatives of each of the
persons, firms and corporations listed in Schedule A hereto (herein collectively
called the "Underwriters") and hereby confirms its agreement with the several
Underwriters as follows:

      1.    Description of Shares. The Company proposes to issue and sell
2,000,000 shares of its authorized and unissued Common Stock, no par value, to
the several Underwriters. The Selling Shareholders, acting severally and not
jointly, propose to sell an aggregate of 300,000 shares of the Company's
authorized and outstanding Common Stock, no par value, to the several
Underwriters. The 2,000,000 shares of Common Stock, no par value, of the Company
to be sold by the Company are hereinafter called the "Company Shares" and the
300,000 shares of Common Stock, no par value, to be sold by the Selling
Shareholders are hereinafter called the "Selling Shareholder Shares." The
Company Shares and the Selling Shareholder Shares are hereinafter collectively
referred to as the "Firm Shares." The Company also proposes to grant to the
Underwriters an option to purchase up to 345,000 additional shares of the
Company's Common Stock, no par value (the "Option Shares"), as provided in
Section 7 hereof. As used in this Agreement, the term "Shares" shall include the
Firm Shares and the Option Shares. All shares of Common Stock, no par value, of
the Company to be outstanding after giving effect to the sales contemplated
hereby, including the Shares, are hereinafter referred to as "Common Stock."

      2.    Representations, Warranties and Agreements of the Company and the
Selling Shareholders.

--------

(1)   Plus an option to purchase up to 345,000 additional shares from the
      Company to cover over-allotments, if any.


<PAGE>   2
            I.    The Company represents and warrants to and agrees with each
Underwriter and each Selling Shareholder that:

                  (a)   A registration statement on Form S-1 (File No.
333-__________) with respect to the Shares, including a prospectus subject to
completion, has been prepared by the Company in conformity with the requirements
of the Securities Act of 1933, as amended (the "Act"), and the applicable rules
and regulations (the "Rules and Regulations") of the Securities and Exchange
Commission (the "Commission") under the Act and has been filed with the
Commission; such amendments to such registration statement, such amended
prospectuses subject to completion and such abbreviated registration statements
pursuant to Rule 462(b) of the Rules and Regulations as may have been required
prior to the date hereof have been similarly prepared and filed with the
Commission; and the Company will file such additional amendments to such
registration statement, such amended prospectuses subject to completion and such
abbreviated registration statements as may hereafter be required. Copies of such
registration statement and amendments, of each related prospectus subject to
completion (the "Preliminary Prospectuses"), and of any abbreviated registration
statement pursuant to Rule 462(b) of the Rules and Regulations have been
delivered to you.

                  If the registration statement relating to the Shares has been
declared effective under the Act by the Commission, the Company will prepare and
promptly file with the Commission the information omitted from the registration
statement pursuant to Rule 430A(a) or, if BancAmerica Robertson Stephens, on
behalf of the several Underwriters, shall agree to the utilization of Rule 434
of the Rules and Regulations, the information required to be included in any
term sheet filed pursuant to Rule 434(b) or (c), as applicable, of the Rules and
Regulations pursuant to subparagraph (1), (4) or (7) of Rule 424(b) of the Rules
and Regulations or as part of a post-effective amendment to the registration
statement (including a final form of prospectus). If the registration statement
relating to the Shares has not been declared effective under the Act by the
Commission, the Company will prepare and promptly file an amendment to the
registration statement, including a final form of prospectus, or, if BancAmerica
Robertson Stephens, on behalf of the several Underwriters, shall agree to the
utilization of Rule 434 of the Rules and Regulations, the information required
to be included in any term sheet filed pursuant to Rule 434(b) or (c), as
applicable, of the Rules and Regulations. The term "Registration Statement" as
used in this Agreement shall mean such registration statement, including
financial statements, schedules and exhibits, in the form in which it became or
becomes, as the case may be, effective (including, if the Company omitted
information from the registration statement pursuant to Rule 430A(a) or files a
term sheet pursuant to Rule 434 of the Rules and Regulations, the information
deemed to be a part of the registration statement at the time it became
effective pursuant to Rule 430A(b) or Rule 434(d) of the Rules and Regulations)
and, in the event of any amendment thereto or the filing of any abbreviated
registration statement pursuant to Rule 462(b) of the Rules and Regulations
relating thereto after the effective date of such registration statement, shall
also mean (from and after the effectiveness of such amendment or the filing of
such abbreviated registration statement) such registration statement as so
amended, together with any such abbreviated registration statement. The term
"Prospectus" as used in this Agreement shall mean the prospectus relating to the
Shares as included in such Registration Statement at the time it becomes
effective (including, if the Company omitted information from the Registration
Statement pursuant to Rule 430A(a) of the Rules and Regulations, the information
deemed to be a part of the Registration Statement at the time it became
effective pursuant to Rule 430A(b) of the Rules and Regulations); provided,
however, that if in reliance on Rule 434 of the Rules and Regulations and with
the consent of BancAmerica Robertson Stephens, on behalf of the several
Underwriters, the Company shall have provided to the Underwriters a term sheet
pursuant to Rule 434(b) or (c), as applicable, prior to the time that a
confirmation is sent or given for purposes of Section 2(10)(a) of the Act, the
term "Prospectus" shall mean the "prospectus subject to completion" (as defined
in Rule 434(g) of the Rules and Regulations) last provided to the Underwriters
by the Company and circulated by the Underwriters to all prospective purchasers
of the Shares (including the information deemed to be a part of the Registration
Statement at the time it became effective pursuant to Rule 434(d) of the Rules
and Regulations). Notwithstanding the foregoing, if any revised prospectus shall
be provided to the Underwriters by the Company for use in connection with the
offering of the Shares that


                                      -2-
<PAGE>   3
differs from the prospectus referred to in the immediately preceding sentence
(whether or not such revised prospectus is required to be filed with the
Commission pursuant to Rule 424(b) of the Rules and Regulations), the term
"Prospectus" shall refer to such revised prospectus from and after the time it
is first provided to the Underwriters for such use. If in reliance on Rule 434
of the Rules and Regulations and with the consent of BancAmerica Robertson
Stephens, on behalf of the several Underwriters, the Company shall have provided
to the Underwriters a term sheet pursuant to Rule 434(b) or (c), as applicable,
prior to the time that a confirmation is sent or given for purposes of Section
2(10)(a) of the Act, the Prospectus and the term sheet, together, will not be
materially different from the prospectus in the Registration Statement.

                  (b)   The Commission has not issued any order preventing or
suspending the use of any Preliminary Prospectus or instituted proceedings for
that purpose, and each such Preliminary Prospectus has conformed in all material
respects to the requirements of the Act and the Rules and Regulations and, as of
its date, has not included any untrue statement of a material fact or omitted to
state a material fact necessary to make the statements therein, in the light of
the circumstances under which they were made, not misleading; and at the time
the Registration Statement became or becomes, as the case may be, effective and
at all times subsequent thereto up to and on the Closing Date (hereinafter
defined) and on any later date on which Option Shares are to be purchased, (i)
the Registration Statement and the Prospectus, and any amendments or supplements
thereto, contained and will contain all material information required to be
included therein by the Act and the Rules and Regulations and will in all
material respects conform to the requirements of the Act and the Rules and
Regulations, (ii) the Registration Statement, and any amendments or supplements
thereto, did not and will not include any untrue statement of a material fact or
omit to state a material fact required to be stated therein or necessary to make
the statements therein not misleading, and (iii) the Prospectus, and any
amendments or supplements thereto, did not and will not include any untrue
statement of a material fact or omit to state a material fact necessary 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 contained in this subparagraph (b) shall apply to information
contained in or omitted from the Registration Statement or Prospectus, or any
amendment or supplement thereto, in reliance upon, and in conformity with,
written information relating to any Underwriter furnished to the Company by such
Underwriter specifically for use in the preparation thereof.

                  (c)   The Company has been duly incorporated and is validly
existing as a corporation in good standing under the laws of the State of
California with full power and authority (corporate and other) to own, lease and
operate its properties and conduct its business as described in the Prospectus;
the Company is duly qualified to do business as a foreign corporation and is in
good standing in each jurisdiction in which the ownership or leasing of its
properties or the conduct of its business requires such qualification, except
where the failure to be so qualified or be in good standing would not have a
material adverse effect on the condition (financial or otherwise), earnings,
operations, business or business prospects (as set forth in the Registration
Statement and Prospectus) of the Company; no proceeding has been instituted in
any such jurisdiction, revoking, limiting or curtailing, or seeking to revoke,
limit or curtail, such power and authority or qualification; the Company is in
possession of and operating in compliance with all authorizations, licenses,
certificates, consents, orders and permits from state, federal and other
regulatory authorities which are material to the conduct of its business, all of
which are valid and in full force and effect; the Company is not in violation of
its charter or bylaws or in default in the performance or observance of any
material obligation, agreement, covenant or condition contained in any material
bond, debenture, note or other evidence of indebtedness, or in any material
lease, contract, indenture, mortgage, deed of trust, loan agreement, joint
venture or other agreement or instrument to which the Company is a party or by
which it or its properties may be bound; and the Company is not in material
violation of any law, order, rule, regulation, writ, injunction, judgment or
decree of any court, government or governmental agency or body, domestic or
foreign, having jurisdiction over the Company or over its properties of which it
has knowledge. The Company does not own or control, directly or indirectly, any
corporation, association or other entity other than 3Dfx Interactive
International, a corporation formed under the laws of Grand Cayman, B.W.I.,
which


                                      -3-
<PAGE>   4
was formed in ________, 1998, does not own, lease or operate any property and
has not conducted any business since inception.

                  (d)   The Company has full legal right, power and authority to
enter into this Agreement and perform the transactions contemplated hereby. This
Agreement has been duly authorized, executed and delivered by the Company and is
a valid and binding agreement on the part of the Company, enforceable in
accordance with its terms, except as rights to indemnification hereunder may be
limited by applicable law and except as the enforcement hereof may be limited by
applicable bankruptcy, insolvency, reorganization, moratorium or other similar
laws relating to or affecting creditors' rights generally or by general
equitable principles; the performance of this Agreement and the consummation of
the transactions herein contemplated will not result in a material breach or
violation of any of the terms and provisions of, or constitute a default under,
(i) any material bond, debenture, note or other evidence of indebtedness, or
under any material lease, contract, indenture, mortgage, deed of trust, loan
agreement, joint venture or other agreement or instrument to which the Company
is a party or by which it or its properties may be bound, (ii) the charter or
bylaws of the Company, or (iii) any law, order, rule, regulation, writ,
injunction, judgment or decree of any court, government or governmental agency
or body, domestic or foreign, having jurisdiction over the Company or over its
properties of which the Company has knowledge. No consent, approval,
authorization or order of or qualification with any court, government or
governmental agency or body, domestic or foreign, having jurisdiction over the
Company or over its properties is required for the execution and delivery of
this Agreement and the consummation by the Company of the transactions herein
contemplated, except such as may be required under the Act or the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), or under state or other
securities or Blue Sky laws, all of which requirements have been satisfied, or
will have been satisfied prior to the Closing Date (as hereinafter defined) in
all material respects.

                  (e)   There is not any pending or, to the best of the
Company's knowledge, threatened action, suit, claim or proceeding against the
Company or any of its officers or any of its properties, assets or rights before
any court, government or governmental agency or body, domestic or foreign,
having jurisdiction over the Company or over its officers or properties or
otherwise which (i) might result in any material adverse change in the condition
(financial or otherwise), earnings, operations, business or business prospects
(as set forth in the Registration Statement and Prospectus) of the Company or
might materially and adversely affect its properties, assets or rights, (ii)
might prevent consummation of the transactions contemplated hereby or (iii) is
required to be disclosed in the Registration Statement or Prospectus and is not
so disclosed; and there are no agreements, contracts, leases or documents of the
Company of a character required to be described or referred to in the
Registration Statement or Prospectus or to be filed as an exhibit to the
Registration Statement by the Act or the Rules and Regulations which have not
been accurately described in all material respects in the Registration Statement
or Prospectus or filed as exhibits to the Registration Statement.

                  (f)   All outstanding shares of capital stock of the Company,
including the Selling Shareholder Shares, have been duly authorized and validly
issued and are fully paid and nonassessable, have been issued in compliance with
all federal and state securities laws, were not issued in violation of or
subject to any preemptive rights or other rights to subscribe for or purchase
securities, and the authorized and outstanding capital stock of the Company is
as set forth in the Prospectus under the caption "Capitalization" as of the date
stated therein and conforms in all material respects to the statements relating
thereto contained in the Registration Statement and the Prospectus (and such
statements correctly state in all material respects the substance of the
instruments defining the capitalization of the Company); the Company Shares and
the Option Shares have been duly authorized for issuance and sale to the
Underwriters pursuant to this Agreement and, when issued and delivered by the
Company against payment therefor in accordance with the terms of this Agreement,
will be duly and validly issued and fully paid and nonassessable, and will be
sold free and clear of any pledge, lien, security interest, encumbrance, claim
or equitable interest; and no preemptive right, 


                                      -4-
<PAGE>   5
co-sale right, registration right, right of first refusal or other similar right
of shareholders exists with respect to any of the Company Shares or Option
Shares or the issuance and sale thereof other than those that have been
expressly waived prior to the date hereof and those that will automatically
expire upon and will not apply to the consummation of the transactions
contemplated on the Closing Date. No further approval or authorization of any
shareholder, the Board of Directors of the Company or others is required for the
issuance and sale or transfer of the Shares except as may be required under the
Act or the Exchange Act, or under state or other securities or Blue Sky laws.
Except as disclosed in or contemplated by the Prospectus and the financial
statements of the Company, and the related notes thereto, included in the
Prospectus, the Company does not have outstanding any options to purchase, or
any preemptive rights or other rights to subscribe for or to purchase, any
securities or obligations convertible into, or any contracts or commitments to
issue or sell, shares of its capital stock or any such options, rights,
convertible securities or obligations. The description of the Company's stock
option, stock bonus and other stock plans or arrangements, and the options or
other rights granted and exercised thereunder, set forth in the Prospectus
accurately and fairly presents the information required to be shown with respect
to such plans, arrangements, options and rights.

                  (g)   Price Waterhouse LLP, which has examined the financial
statements of the Company, together with the related notes, as of December 31,
1996 and 1997, and for each of the years in the three years ended December 31,
1995, 1996 and 1997 filed with the Commission as a part of the Registration
Statement, which are included in the Prospectus, are independent accountants
within the meaning of the Act and the Rules and Regulations; the audited
financial statements of the Company, together with the related notes, and the
unaudited financial information, forming part of the Registration Statement and
Prospectus, fairly present the financial position and the results of operations
of the Company at the respective dates and for the respective periods to which
they apply; and all audited financial statements of the Company, together with
the related notes, and the unaudited financial information, filed with the
Commission as part of the Registration Statement, have been prepared in
accordance with or derived from financial statements prepared in accordance with
generally accepted accounting principles consistently applied throughout the
periods involved except as may be otherwise stated therein. The selected and
summary financial and statistical data included in the Registration Statement
present fairly the information shown therein and have been compiled on a basis
consistent with the audited financial statements presented therein. No other
financial statements are required to be included in the Registration Statement.
No financial statement schedules are required to be included in the Registration
Statement.

                  (h)   Subsequent to the respective dates as of which
information is given in the Registration Statement and Prospectus, there has not
been (i) any material adverse change in the condition (financial or otherwise),
earnings, operations, business or business prospects (as set forth in the
Registration Statement and Prospectus) of the Company, (ii) any transaction that
is material to the Company, except transactions entered into in the ordinary
course of business, (iii) any obligation, direct or contingent, that is material
to the Company, incurred by the Company, except obligations incurred in the
ordinary course of business, (iv) any change in the capital stock or outstanding
indebtedness of the Company that is material to the Company, (v) any dividend or
distribution of any kind declared, paid or made on the capital stock of the
Company, or (vi) any loss or damage (whether or not insured) to the property of
the Company which has been sustained or will have been sustained which has a
material adverse effect on the condition (financial or otherwise), earnings,
operations, business or business prospects (as set forth in the Registration
Statement and Prospectus) of the Company.

                  (i)   Except as set forth in the Registration Statement and
Prospectus, (i) the Company has good and marketable title to all properties and
assets described in the Registration Statement and Prospectus as owned by it,
free and clear of any pledge, lien, security interest, encumbrance, claim or
equitable interest, other than such as would not have a material adverse effect
on the condition (financial or otherwise), earnings, operations, business or
business prospects (as set forth in the Registration Statement and Prospectus)
of the Company, (ii) the agreements to which the Company is a party described in
the 


                                      -5-
<PAGE>   6
Registration Statement and Prospectus are valid agreements, enforceable by the
Company, except as the enforcement thereof may be limited by applicable
bankruptcy, insolvency, reorganization, moratorium or other similar laws
relating to or affecting creditors' rights generally or by general equitable
principles and, to the best of the Company's knowledge, the other contracting
party or parties thereto are not in material breach or material default under
any of such agreements, and (iii) the Company has valid and enforceable leases
for all properties described in the Registration Statement and Prospectus as
leased by it, except as the enforcement thereof may be limited by applicable
bankruptcy, insolvency, reorganization, moratorium or other similar laws
relating to or affecting creditors' rights generally or by general equitable
principles. Except as set forth in the Registration Statement and Prospectus,
the Company owns or leases all such properties as are necessary to its
operations as described in the Prospectus.

                  (j)   The Company has timely filed all necessary federal,
state and foreign income and franchise tax returns and has paid all taxes shown
thereon as due, and there is no tax deficiency that has been or, to the best of
the Company's knowledge, might be asserted against the Company that might have a
material adverse effect on the condition (financial or otherwise), earnings,
operations, business or business prospects (as described in the Registration
Statement and Prospectus) of the Company; and all tax liabilities are adequately
provided for on the books of the Company.

                  (k)   The Company maintains insurance with insurers of
recognized financial responsibility of the types and in the amounts generally
deemed adequate for its business and consistent with insurance coverage
maintained by similar companies in similar businesses, including, but not
limited to, insurance covering real and personal property owned or leased by the
Company against theft, damage, destruction, acts of vandalism and all other
risks customarily insured against, all of which insurance is in full force and
effect; the Company has not been refused any insurance coverage sought or
applied for; and the Company does have not any reason to believe that it will
not be able to renew its existing insurance coverage as and when such coverage
expires or to obtain similar coverage from similar insurers as may be necessary
to continue its business at a cost that would not materially and adversely
affect the condition (financial or otherwise), earnings, operations, business or
business prospects (as described in the Registration Statement and Prospectus)
of the Company.

                  (l)   To the best of Company's knowledge, no labor disturbance
by the employees of the Company exists or is imminent; and the Company is not
aware of any existing or imminent labor disturbance by the employees of any of
its principal suppliers, subassemblers, value added resellers, subcontractors,
original equipment manufacturers, authorized dealers or international
distributors that might be expected to result in a material adverse change in
the condition (financial or otherwise), earnings, operations, business or
business prospects (as described in the Registration Statement and Prospectus)
of the Company. No collective bargaining agreement exists with any of the
Company's employees and, to the best of the Company's knowledge, no such
agreement is imminent.

                  (m)   The Company owns or possesses adequate rights to use all
patents, patent rights, inventions, trade secrets, know-how, trademarks, service
marks, trade names and copyrights which are necessary to conduct its businesses
in all material respects as described in the Registration Statement and
Prospectus; no patents, patent rights, trade secrets, trademarks, service marks,
trade names or copyrights have expired or terminated except such as would not
have a material adverse effect on the condition (financial or otherwise),
earnings, operations, business or business prospects (as described in the
Registration Statement and Prospectus) of the Company; the Company has not
received any notice of, and has no knowledge of, any infringement of or conflict
with asserted rights of the Company by others with respect to any patent, patent
rights, inventions, trade secrets, know-how, trademarks, service marks, trade
names or copyrights other than the ongoing litigation with Sega Enterprises,
Ltd., NEC Corporation and VideoLogic Group, plc. (as described in the
Registration Statement and Prospectus); and the Company has not received any
notice of, and has no knowledge of, any infringement of or conflict with
asserted rights of others with respect to any patent, patent rights, inventions,
trade secrets, know-how, 


                                      -6-
<PAGE>   7
trademarks, service marks, trade names or copyrights which, singly or in the
aggregate, if the subject of an unfavorable decision, ruling or finding, would
have a material adverse effect on the condition (financial or otherwise),
earnings, operations, business or business prospects (as described in the
Registration Statement and Prospectus) of the Company.

                  (n)   The Common Stock is registered pursuant to Section 12(g)
of the Exchange Act and is listed on The Nasdaq National Market, and the Company
has taken no action designed to, or likely to have the effect of, terminating
the registration of the Common Stock under the Exchange Act or delisting the
Common Stock from The Nasdaq National Market, nor has the Company received any
notification that the Commission or the National Association of Securities
Dealers, Inc. ("NASD") is contemplating terminating such registration or
listing.

                  (o)   The Company has been advised concerning the Investment
Company Act of 1940, as amended (the "1940 Act"), and the rules and regulations
thereunder, and has in the past conducted, and intends in the future to conduct,
its affairs in such a manner as to ensure that it will not become an "investment
company" or a company "controlled" by an "investment company" within the meaning
of the 1940 Act and such rules and regulations.

                  (p)   The Company has not distributed and will not distribute
prior to the later of (i) the Closing Date, or any date on which Option Shares
are to be purchased, as the case may be, and (ii) completion of the distribution
of the Shares, any offering material in connection with the offering and sale of
the Shares other than any Preliminary Prospectuses, the Prospectus, the
Registration Statement and other materials, if any, permitted by the Act.

                  (q)   The Company has not at any time during the last five (5)
years (i) made any unlawful contribution to any candidate for foreign office or
failed to disclose fully any contribution in violation of law, or (ii) made any
payment to any federal or state governmental officer or official, or other
person charged with similar public or quasi-public duties, other than payments
required or permitted by the laws of the United States or any jurisdiction
thereof.

                  (r)   The Company has not taken and will not take, directly or
indirectly, any action designed to or that might reasonably be expected to cause
or result in stabilization or manipulation of the price of the Common Stock to
facilitate the sale or resale of the Shares.

                  (s)   Each officer and director of the Company, each Selling
Shareholder and each beneficial owner of shares representing at least five
percent (5%) of the Company's outstanding Common Stock has agreed in writing
that such person will not, until the open of the market on the third trading day
following the date of public disclosure of the Company's financial results for
the fiscal year ending March 31, 1998 (the "Lock-up Period"), offer to sell,
contract to sell, or otherwise sell, dispose of, loan, pledge or grant any
rights with respect to (collectively, a "Disposition") any shares of Common
Stock, any options or warrants to purchase any shares of Common Stock or any
securities convertible into or exchangeable for shares of Common Stock
(collectively, "Securities") now owned or hereafter acquired directly by such
person or with respect to which such person has or hereafter acquires the power
of disposition, otherwise than (x) as a bona fide gift or gifts, provided the
donee or donees thereof agree in writing to be bound by this restriction, (y) as
a distribution to limited partners or shareholders of such person, provided that
the distributees thereof agree in writing to be bound by the terms of this
restriction, or (z) with the prior written consent of BancAmerica Robertson
Stephens. The foregoing restriction is expressly agreed to preclude the holder
of the Securities from engaging in any hedging or other transaction which is
designed to or reasonably expected to lead to or result in a Disposition of
Securities during the Lock-up Period, even if such Securities would be disposed
of by someone other than such holder. Such prohibited hedging or other
transactions would include, without limitation, any short sale (whether or not
against the box) or any purchase, sale or 


                                      -7-
<PAGE>   8
grant of any right (including, without limitation, any put or call option) with
respect to any Securities or with respect to any security (other than a
broad-based market basket or index) that includes, relates to or derives any
significant part of its value from Securities. The foregoing restriction shall
not apply to any Disposition of Securities during the Lock-up Period to the
Underwriter pursuant to this Agreement. Furthermore, such person has also agreed
and consented to the entry of stop transfer instructions with the Company's
transfer agent against the transfer of the Securities held by such person except
in compliance with this restriction. The Company has provided to counsel for the
Underwriters a complete and accurate list of all securityholders of the Company
and the number and type of securities held by each securityholder. The Company
has provided to counsel for the Underwriters true, accurate and complete copies
of all of the agreements pursuant to which its officers, directors and
shareholders have agreed to such or similar restrictions (the "Lock-up
Agreements") presently in effect or effected hereby. The Company hereby
represents and warrants that it will not release any of its officers, directors
or other shareholders from any Lock-up Agreements currently existing or
hereafter effected without the prior written consent of BancAmerica Robertson
Stephens.

                  (t)   Except as set forth in the Registration Statement and
Prospectus, (i) the Company is in compliance with all rules, laws and
regulations relating to the use, treatment, storage and disposal of toxic
substances and protection of health or the environment ("Environmental Laws")
which are applicable to its business, (ii) the Company has received no notice
from any governmental authority or third party of an asserted claim under
Environmental Laws, which claim is required to be disclosed in the Registration
Statement and the Prospectus, (iii) to its knowledge, the Company has not
conducted any activities that would require it to make future material capital
expenditures to comply with Environmental Laws and (iv) no property which is
owned, leased or occupied by the Company has been designated as a Superfund site
pursuant to the Comprehensive Response, Compensation, and Liability Act of 1980,
as amended (42 U.S.C. ss. 9601, et seq.), or otherwise designated as a
contaminated site under applicable state or local law.

                  (u)   The Company maintains a system of internal accounting
controls sufficient to provide reasonable assurances that (i) transactions are
executed in accordance with management's general or specific authorizations,
(ii) transactions are recorded as necessary to permit preparation of financial
statements in conformity with generally accepted accounting principles and to
maintain accountability for assets, (iii) access to assets is permitted only in
accordance with management's general or specific authorization, and (iv) the
recorded accountability for assets is compared with existing assets at
reasonable intervals and appropriate action is taken with respect to any
differences.

                  (v)   There are no outstanding loans, advances (except normal
advances for business expenses in the ordinary course of business) or guarantees
of indebtedness by the Company to or for the benefit of any of the officers or
directors of the Company or any of the members of the families of any of them
that are required to be disclosed in the Registration Statement and Prospectus
that are not so disclosed.

                  (w)   The Company has complied with all provisions of Section
517.075, Florida Statutes relating to doing business with the Government of Cuba
or with any person or affiliate located in Cuba.

            II.   Each Selling Shareholder, severally and not jointly,
represents and warrants to and agrees with each Underwriter and the Company
that:

                  (a)   Such Selling Shareholder now has and on the Closing
Date[, and on any later date on which Option Shares are purchased,] will have
valid marketable title to the Shares to be sold by such Selling Shareholder,
free and clear of any pledge, lien, security interest, encumbrance, claim or
equitable interest other than pursuant to this Agreement; and upon delivery of
such Shares hereunder and payment of the purchase price as herein contemplated,
each of the Underwriters will obtain valid marketable title to the Shares
purchased by it from such Selling Shareholder, free and clear of any pledge,
lien, security interest 


                                      -8-
<PAGE>   9
pertaining to such Selling Shareholder or such Selling Shareholder's property,
encumbrance, claim or equitable interest, including any liability for estate or
inheritance taxes, or any liability to or claims of any creditor, devisee,
legatee or beneficiary of such Selling Shareholder.

                  (b)   Such Selling Shareholder has duly authorized (if
applicable), executed and delivered, in the form heretofore furnished to the
Representatives, an irrevocable Power of Attorney (the "Power of Attorney")
appointing ___________ and ___________ as attorneys-in-fact (collectively, the
"Attorneys" and individually, an "Attorney") and a Letter of Transmittal and
Custody Agreement (the "Custody Agreement") with ______________________________,
as custodian (the "Custodian"); each of the Power of Attorney and the Custody
Agreement constitutes a valid and binding agreement on the part of such Selling
Shareholder, enforceable in accordance with its terms, except as the enforcement
thereof may be limited by applicable bankruptcy, insolvency, reorganization,
moratorium or other similar laws relating to or affecting creditors' rights
generally or by general equitable principles; and each of such Selling
Shareholder's Attorneys, acting alone, is authorized to execute and deliver this
Agreement and the certificate referred to in Section 6(h) hereof on behalf of
such Selling Shareholder, to determine the purchase price to be paid by the
several Underwriters to such Selling Shareholder as provided in Section 3
hereof, to authorize the delivery of the Selling Shareholder Shares under this
Agreement and to duly endorse (in blank or otherwise) the certificate or
certificates representing such Shares or a stock power or powers with respect
thereto, to accept payment therefor, and otherwise to act on behalf of such
Selling Shareholder in connection with this Agreement.

                  (c)   All consents, approvals, authorizations and orders
required for the execution and delivery by such Selling Shareholder of the Power
of Attorney and the Custody Agreement, the execution and delivery by or on
behalf of such Selling Shareholder of this Agreement and the sale and delivery
of the Selling Shareholder Shares under this Agreement (other than, at the time
of the execution hereof (if the Registration Statement has not yet been declared
effective by the Commission), the issuance of the order of the Commission
declaring the Registration Statement effective and such consents, approvals,
authorizations or orders as may be necessary under state or other securities or
Blue Sky laws) have been obtained and are in full force and effect; such Selling
Shareholder, if other than a natural person, has been duly organized and is
validly existing in good standing under the laws of the jurisdiction of its
organization as the type of entity that it purports to be; and such Selling
Shareholder has full legal right, power and authority to enter into and perform
its obligations under this Agreement and such Power of Attorney and Custody
Agreement, and to sell, assign, transfer and deliver the Shares to be sold by
such Selling Shareholder under this Agreement.

                  (d)   Such Selling Shareholder will not, during the Lock-up
Period, effect the Disposition of any Securities now owned or hereafter acquired
directly by such Selling Shareholder or with respect to which such Selling
Shareholder has or hereafter acquires the power of disposition, otherwise than
(i) as a bona fide gift or gifts, provided the donee or donees thereof agree in
writing to be bound by this restriction, (ii) as a distribution to partners or
shareholders of such Selling Shareholder, provided that the distributees thereof
agree in writing to be bound by the terms of this restriction, or (iii) with the
prior written consent of BancAmerica Robertson Stephens. The foregoing
restriction is expressly agreed to preclude the holder of the Securities from
engaging in any hedging or other transaction which is designed to or reasonably
expected to lead to or result in a Disposition of Securities during the Lock-up
Period, even if such Securities would be disposed of by someone other than the
Selling Shareholder. Such prohibited hedging or other transactions would
include, without limitation, any short sale (whether or not against the box) or
any purchase, sale or grant of any right (including, without limitation, any put
or call option) with respect to any Securities or with respect to any security
(other than a broad-based market basket or index) that includes, relates to or
derives any significant part of its value from Securities. The foregoing
restrictions shall not apply to any Disposition of Securities during the Lock-up
Period to the Underwriters pursuant to this Agreement. Such Selling Shareholder
also agrees and consents to the entry of stop transfer instructions with 


                                      -9-
<PAGE>   10
the Company's transfer agent against the transfer of the securities held by such
Selling Shareholder except in compliance with this restriction.

                  (e)   Certificates in negotiable form for all Shares to be
sold by such Selling Shareholder under this Agreement, together with a stock
power or powers duly endorsed in blank by such Selling Shareholder, have been
placed in custody with the Custodian for the purpose of effecting delivery
hereunder.

                  (f)   This Agreement has been duly authorized by each Selling
Shareholder that is not a natural person and has been duly executed and
delivered by or on behalf of such Selling Shareholder and is a valid and binding
agreement of such Selling Shareholder, enforceable in accordance with its terms,
except as rights to indemnification hereunder may be limited by applicable law
and except as the enforcement hereof may be limited by bankruptcy, insolvency,
reorganization, moratorium or other similar laws relating to or affecting
creditors' rights generally or by general equitable principles; and the
performance of this Agreement and the consummation of the transactions herein
contemplated will not result in a breach or violation of any of the terms and
provisions of or constitute a default under any bond, debenture, note or other
evidence of indebtedness, or under any lease, contract, indenture, mortgage,
deed of trust, loan agreement, joint venture or other agreement or instrument to
which such Selling Shareholder is a party or by which such Selling Shareholder,
or any Selling Shareholder Shares hereunder, may be bound or, to the best of 
such Selling Shareholders' knowledge, result in any violation of any law, 
order, rule, regulation, writ, injunction, judgment or decree of any court,
government or governmental agency or body, domestic or foreign, having
jurisdiction over such Selling Shareholder or over the properties of such
Selling Shareholder, or, if such Selling Shareholder is other than a natural
person, result in any violation of any provisions of the charter, bylaws or
other organizational documents of such Selling Shareholder.

                  (g)   Such Selling Shareholder has not taken and will not
take, directly or indirectly, any action designed to or that might reasonably be
expected to cause or result in stabilization or manipulation of the price of the
Common Stock to facilitate the sale or resale of the Shares.

                  (h)   Such Selling Shareholder has not distributed and will
not distribute any prospectus or other offering material in connection with the
offering and sale of the Shares.

                  (i)   All information furnished by or on behalf of such
Selling Shareholder relating to such Selling Shareholder and the Selling
Shareholder Shares that is contained in the representations and warranties of
such Selling Shareholder in such Selling Shareholder's Power of Attorney or set
forth in the Registration Statement or the Prospectus is, and at the time the
Registration Statement became or becomes, as the case may be, effective and at
all times subsequent thereto up to and on the Closing Date was or will be, true,
correct and complete, and does not, and at the time the Registration Statement
became or becomes, as the case may be, effective and at all times subsequent
thereto up to and on the Closing Date (hereinafter defined) will not, contain
any untrue statement of a material fact or omit to state a material fact
required to be stated therein or necessary to make such information not
misleading.

                  (j)   Such Selling Shareholder will review the Prospectus and
will comply with all agreements and satisfy all conditions on its part to be
complied with or satisfied pursuant to this Agreement on or prior to the Closing
Date, and will advise one of its Attorneys and BancAmerica Robertson Stephens
prior to the Closing Date if any statement to be made on behalf of such Selling
Shareholder in the certificate contemplated by Section 6(h) would be inaccurate
if made as of the Closing Date.

                  (k)   Such Selling Shareholder does not have, or has waived
prior to the date hereof, any preemptive right, co-sale right or right of first
refusal or other similar right to purchase any of the Shares 


                                      -10-
<PAGE>   11
that are to be sold by the Company or any of the other Selling Shareholders to
the Underwriters pursuant to this Agreement; such Selling Shareholder does not
have, or has waived prior to the date hereof, any registration right or other
similar right to participate in the offering made by the Prospectus, other than
such rights of participation as have been satisfied by the participation of such
Selling Shareholder in the transactions to which this Agreement relates in
accordance with the terms of this Agreement; and such Selling Shareholder does
not own any warrants, options or similar rights to acquire, and does not have
any right or arrangement to acquire, any capital stock, rights, warrants,
options or other securities from the Company, other than those described in the
Registration Statement and the Prospectus.

                  (l)   Such Selling Shareholder is not aware (without having
conducted any investigation or inquiry) that any of the representations and
warranties of the Company set forth in Section 2.I. above is untrue or
inaccurate in any material respect.

      3.    Purchase, Sale and Delivery of Shares. On the basis of the
representations, warranties and agreements herein contained, but subject to the
terms and conditions herein set forth, the Company and the Selling Shareholders
agree, severally and not jointly, to sell to the Underwriters, and each
Underwriter agrees, severally and not jointly, to purchase from the Company and
the Selling Shareholders, respectively, at a purchase price of $______ per
share, the respective number of Company Shares and Selling Shareholder Shares
set forth opposite the names of the Company and the Selling Shareholders in
Schedule B hereto. The obligation of each Underwriter to the Company and to each
Selling Shareholder shall be to purchase from the Company or such Selling
Shareholder that number of Company Shares or Selling Shareholder Shares, as the
case may be, which (as nearly as practicable, as determined by you) is in the
same proportion to the number of Company Shares or Selling Shareholder Shares,
as the case may be, set forth opposite the name of the Company or such Selling
Shareholder in Schedule B hereto as the number of Firm Shares which is set forth
opposite the name of such Underwriter in Schedule A hereto (subject to
adjustment as provided in Section 10) is the total number of Firm Shares to be
purchased by all Underwriters under this Agreement.

            The certificates in negotiable form for the Selling Shareholder
Shares have been placed in custody (for delivery under this Agreement) under the
Custody Agreement. Each Selling Shareholder agrees that the certificates for the
Selling Shareholder Shares of such Selling Shareholder so held in custody are
subject to the interests of the Underwriters hereunder, that the arrangements
made by such Selling Shareholder for such custody, including the Power of
Attorney is to that extent irrevocable and that the obligations of such Selling
Shareholder hereunder shall not be terminated by the act of such Selling
Shareholder or by operation of law, whether by the death or incapacity of such
Selling Shareholder or the occurrence of any other event, except as specifically
provided herein or in the Custody Agreement. If any Selling Shareholder should
die or be incapacitated, or if any other such event should occur, before the
delivery of the certificates for the Selling Shareholder Shares hereunder, the
Selling Shareholder Shares to be sold by such Selling Shareholder shall, except
as specifically provided herein or in the Custody Agreement, be delivered by the
Custodian 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 Custodian shall have received notice of such death or other event.

            Delivery of definitive certificates for the Firm Shares to be
purchased by the Underwriters pursuant to this Section 3 shall be made against
receipts of wire transfer reference numbers issued by the Federal Reserve System
evidencing payment of the purchase price therefor by the several Underwriters by
wire transfer of immediately available funds to an account specified in writing
by the Company with regard to the Shares being purchased from the Company and to
an account specified in writing by the Custodian with regard to the Shares being
purchased from such Selling Shareholders, at the offices of Wilson Sonsini
Goodrich & Rosati, 650 Page Mill Road, Palo Alto, California 94304 (or at such
other place as may be agreed upon among the Representatives and the Company and
the Attorneys), at 7:00 A.M., San Francisco time (a) on the third (3rd) full
business day following the first day that Shares are traded, (b) if this


                                      -11-
<PAGE>   12
Agreement is executed and delivered after 1:30 P.M., San Francisco time, the
fourth (4th) full business day following the day that this Agreement is executed
and delivered or (c) at such other time and date not later than seven (7) full
business days following the first day that Shares are traded as the
Representatives and the Company and the Attorneys may determine (or at such time
and date to which payment and delivery shall have been postponed pursuant to
Section 10 hereof), such time and date of payment and delivery being herein
called the "Closing Date;" provided, however, that if the Company has not made
available to the Representatives copies of the Prospectus within the time
provided in Section 4(d) hereof, the Representatives may, in their sole
discretion, postpone the Closing Date until no later than two (2) full business
days following delivery of copies of the Prospectus to the Representatives. The
certificates for the Firm Shares to be so delivered will be made available to
you at such office or such other location including, without limitation, in New
York City, as you may reasonably request for checking at least one (1) full
business day prior to the Closing Date and will be in such names and
denominations as you may request, such request to be made at least two (2) full
business days prior to the Closing Date. If the Representatives so elect,
delivery of the Firm Shares may be made by credit through full fast transfer to
the accounts at The Depository Trust Company designated by the Representatives.

            It is understood that you, individually, and not as the
Representatives of the several Underwriters, may (but shall not be obligated to)
make payment of the purchase price on behalf of any Underwriter or Underwriters
whose wire transfer funds shall not have been received by you prior to the
Closing Date for the Firm Shares to be purchased by such Underwriter or
Underwriters. Any such payment by you shall not relieve any such Underwriter or
Underwriters of any of its or their obligations hereunder.

            After the Registration Statement becomes effective, the several
Underwriters intend to make an initial public offering (as such term is
described in Section 11 hereof) of the Firm Shares at an initial public offering
price of $__________ per share. After the initial public offering, the several
Underwriters may, in their discretion, vary the public offering price.

            The information set forth in the last paragraph on the front cover
page (insofar as such information relates to the Underwriters), under the
paragraph on page 2, concerning stabilization and over-allotment by the
Underwriters, and under the first (including the table), second, seventh  and
eighth paragraphs under the caption "Underwriting" in any Preliminary Prospectus
and in the final form of Prospectus filed pursuant to Rule 424(b) constitutes
the only information furnished by the Underwriters to the Company for inclusion
in any Preliminary Prospectus, the Prospectus or the Registration Statement, and
you, on behalf of the respective Underwriters, represent and warrant to the
Company and the Selling Shareholders that the statements made therein do not
include any untrue statement of a material fact or omit to state a material fact
required to be stated therein or necessary to make the statements therein, in
the light of the circumstances under which they were made, not misleading.

      4.    Further Agreements of the Company. The Company agrees with the
several Underwriters that:

                  (a)   The Company will use its best efforts to cause the
Registration Statement and any amendment thereof, if not effective at the time
and date that this Agreement is executed and delivered by the parties hereto, to
become effective as promptly as possible; the Company will use its best efforts
to cause any abbreviated registration statement pursuant to Rule 462(b) of the
Rules and Regulations as may be required subsequent to the date the Registration
Statement is declared effective to become effective as promptly as possible; the
Company will notify you, promptly after it shall receive notice thereof, of the
time when the Registration Statement, any subsequent amendment to the
Registration Statement or any abbreviated registration statement has become
effective or any supplement to the Prospectus has been filed; if the Company
omitted information from the Registration Statement at the time it was
originally declared effective in reliance upon Rule 430A(a) of the Rules and
Regulations, the Company will provide evidence satisfactory to you that the
Prospectus contains such information and has been filed, within the time period
prescribed, 


                                      -12-
<PAGE>   13
with the Commission pursuant to subparagraph (1) or (4) of Rule 424(b) of the
Rules and Regulations or as part of a post-effective amendment to such
Registration Statement as originally declared effective which is declared
effective by the Commission; if the Company files a term sheet pursuant to Rule
434 of the Rules and Regulations, the Company will provide evidence satisfactory
to you that the Prospectus and term sheet meeting the requirements of Rule
434(b) or (c), as applicable, of the Rules and Regulations, have been filed,
within the time period prescribed, with the Commission pursuant to subparagraph
(7) of Rule 424(b) of the Rules and Regulations; if for any reason the filing of
the final form of Prospectus is required under Rule 424(b)(3) of the Rules and
Regulations, it will provide evidence satisfactory to you that the Prospectus
contains such information and has been filed with the Commission within the time
period prescribed; it will notify you promptly of any request by the Commission
for the amending or supplementing of the Registration Statement or the
Prospectus or for additional information; promptly upon your request, it will
prepare and file with the Commission any amendments or supplements to the
Registration Statement or Prospectus which, in the reasonable opinion of counsel
for the several Underwriters ("Underwriters' Counsel"), may be necessary or
advisable in connection with the distribution of the Shares by the Underwriters;
it will promptly prepare and file with the Commission, and promptly notify you
of the filing of, any amendments or supplements to the Registration Statement or
Prospectus which may be necessary to correct any statements or omissions, if, at
any time when a prospectus relating to the Shares is required to be delivered
under the Act, any event shall have occurred as a result of which the Prospectus
or any other prospectus relating to the Shares as then in effect would include
any untrue statement of a material fact or omit to state a material fact
necessary to make the statements therein, in the light of the circumstances
under which they were made, not misleading; in case any Underwriter is required
to deliver a prospectus nine (9) months or more after the effective date of the
Registration Statement in connection with the sale of the Shares, it will
prepare as promptly as practicable upon request, but at the expense of such
Underwriter, such amendment or amendments to the Registration Statement and such
prospectus or prospectuses as may be necessary to permit compliance with the
requirements of Section 10(a)(3) of the Act; and it will file no amendment or
supplement to the Registration Statement or Prospectus which shall not
previously have been submitted to you a reasonable time prior to the proposed
filing thereof or to which you shall reasonably object in writing, subject,
however, to compliance with the Act and the Rules and Regulations and the
provisions of this Agreement.

                  (b)   The Company will advise you, promptly after it shall
receive notice or obtain knowledge, of the issuance of any stop order by the
Commission suspending the effectiveness of the Registration Statement or of the
initiation or threat of any proceeding for that purpose; and it will promptly
use its best efforts to prevent the issuance of any stop order or to obtain its
withdrawal at the earliest possible moment if such stop order should be issued.

                  (c)   The Company will use its best efforts to qualify the
Shares for offering and sale under the securities laws of such jurisdictions as
you may reasonably designate and to continue such qualifications in effect for
so long as may be required for purposes of the distribution of the Shares,
except that the Company shall not be required in connection therewith or as a
condition thereof to qualify as a foreign corporation or to execute a general
consent to service of process in any jurisdiction in which it is not otherwise
required to be so qualified or to so execute a general consent to service of
process. In each jurisdiction in which the Shares shall have been qualified as
above provided, the Company will make and file such statements and reports in
each year as are or may be reasonably required by the laws of such jurisdiction.

                  (d)   The Company will furnish to you, as soon as available,
and, in the case of the Prospectus and any term sheet or abbreviated term sheet
under Rule 434, in no event later than the first (1st) full business day
following the first day that Shares are traded, copies of the Registration
Statement (three of which will be signed and which will include all exhibits),
each Preliminary Prospectus, the Prospectus and any amendments or supplements to
such documents, including any prospectus prepared to permit compliance 


                                      -13-
<PAGE>   14
with Section 10(a)(3) of the Act, all in such quantities as you may from time to
time reasonably request. Notwithstanding the foregoing, if BancAmerica Robertson
Stephens, on behalf of the several Underwriters, shall agree to the utilization
of Rule 434 of the Rules and Regulations, the Company shall provide to you
copies of a Preliminary Prospectus updated in all respects through the date
specified by you in such quantities as you may from time to time reasonably
request.

                  (e)   The Company will make generally available to its
securityholders as soon as practicable, but in any event not later than the
forty-fifth (45th) day following the end of the fiscal quarter first occurring
after the first anniversary of the effective date of the Registration Statement,
an earnings statement (which will be in reasonable detail but need not be
audited) complying with the provisions of Section 11(a) of the Act and covering
a twelve (12) month period beginning after the effective date of the
Registration Statement.

                  (f)   During a period of five (5) years after the date hereof,
the Company will furnish to its shareholders as soon as practicable after the
end of each respective period, annual reports (including financial statements
audited by independent certified public accountants) and unaudited quarterly
reports of operations for each of the first three quarters of the fiscal year,
and will furnish to you and the other several Underwriters hereunder, upon
request (i) concurrently with furnishing such report to its shareholders,
statements of operations of the Company for each of the first three (3) quarters
in the form furnished to the Company's shareholders, (ii) concurrently with
furnishing to its shareholders, a balance sheet of the Company as of the end of
such fiscal year, together with statements of operations, of shareholders'
equity, and of cash flows of the Company for such fiscal year, accompanied by a
copy of the certificate or report thereon of independent certified public
accountants, (iii) as soon as they are available, copies of all reports
(financial or other) mailed to shareholders, (iv) as soon as they are available,
copies of all reports and financial statements furnished to or filed with the
Commission, any securities exchange or the National Association of Securities
Dealers, Inc. ("NASD"), (v) every material press release and every material news
item or article in respect of the Company or its affairs which was generally
released to shareholders or prepared by the Company or any of its subsidiaries,
and (vi) any additional information of a public nature concerning the Company or
its subsidiaries, or its business which you may reasonably request. During such
five (5) year period, if the Company shall have active subsidiaries, the
foregoing financial statements shall be on a consolidated basis to the extent
that the accounts of the Company and its subsidiaries are consolidated, and
shall be accompanied by similar financial statements for any significant
subsidiary which is not so consolidated.

                  (g)   The Company will apply the net proceeds from the sale of
the Shares being sold by it in the manner set forth under the caption "Use of
Proceeds" in the Prospectus.

                  (h)   The Company will maintain a transfer agent and, if
necessary under the jurisdiction of incorporation of the Company, a registrar
(which may be the same entity as the transfer agent) for its Common Stock.

                  (j)   If the transactions contemplated hereby are not
consummated by reason of any failure, refusal or inability on the part of the
Company or any Selling Shareholder to perform any agreement on their respective
parts to be performed hereunder or to fulfill any condition of the Underwriters'
obligations hereunder (other than for noncompliance with paragraph (e) of
Section 6 hereof), or if the Company shall terminate this Agreement pursuant to
Section 11(a) hereof, or if the Underwriters shall terminate this Agreement
pursuant to Section 11(b)(i), the Company will reimburse the several
Underwriters for all out-of-pocket expenses (including fees and disbursements of
Underwriters' Counsel) incurred by the Underwriters in investigating or
preparing to market or marketing the Shares.


                                      -14-
<PAGE>   15
                  (k)   If at any time during the ninety (90) day period after
the Registration Statement becomes effective, any rumor, publication or event
relating to or affecting the Company shall occur as a result of which in your
reasonable opinion the market price of the Common Stock has been or is likely to
be materially affected (regardless of whether such rumor, publication or event
necessitates a supplement to or amendment of the Prospectus), the Company will,
after written notice from you advising the Company to the effect set forth
above, forthwith prepare, consult with you concerning the substance of and
disseminate a press release or other public statement, reasonably satisfactory
to you, responding to or commenting on such rumor, publication or event.

                  (l)   During the Lock-up Period, the Company will not, without
the prior written consent of BancAmerica Robertson Stephens, effect the
Disposition of, directly or indirectly, any Securities other than (i) the sale
of the Firm Shares and the Option Shares; (ii) the Company's issuance of options
or Common Stock under the Company's presently authorized 1995 Employee Stock
Plan, the 1997 Employee Stock Purchase Plan, the 1997 Supplemental Stock Option
Plan and the Director Option Plan, all as described in the Registration
Statement collectively (the "Option Plans"); (iii) Common Stock upon exercise of
any warrants of the Company outstanding as set forth in the Registration
Statement and Prospectus; (iv) securities pursuant to equipment or lease
financing activities entered into in the ordinary course of the Company's
business; or (v) securities to a strategic partner of the Company in conjunction
with an agreement involving a service, technical, manufacturing and/or marketing
collaboration (provided, however, that the strategic partner agree execute a
Lock-Up Agreement for any remaining Lock-Up Period).

                  (m)   During a period of ninety (90) days from the effective
date of the Registration Statement, the Company will not file a registration
statement registering shares under the Option Plans.

      5.    Expenses.

                  (a)   The Company and the Selling Shareholder agrees with 
each Underwriter that:

                        (i)   The Company and the Selling Shareholder will pay
and bear all costs and expenses in connection with the preparation, printing and
filing of the Registration Statement (including financial statements, schedules
and exhibits), Preliminary Prospectuses and the Prospectus and any amendments or
supplements thereto; the printing of this Agreement, the Agreement Among
Underwriters, the Selected Dealer Agreement, the Preliminary Blue Sky Survey and
any Supplemental Blue Sky Survey, the Underwriters' Questionnaire and Power of
Attorney, and any instruments related to any of the foregoing; the issuance and
delivery of the Shares hereunder to the several Underwriters, including transfer
taxes, if any, the cost of all certificates representing the Shares and transfer
agents' and registrars' fees; the fees and disbursements of counsel for the
Company; all fees and other charges of the Company's independent certified
public accountants; the cost of furnishing to the several Underwriters copies of
the Registration Statement (including appropriate exhibits), Preliminary
Prospectus and the Prospectus, and any amendments or supplements to any of the
foregoing; NASD filing fees and the cost of qualifying the Shares under the laws
of such jurisdictions as you may designate (including filing fees and fees and
disbursements of Underwriters' Counsel in connection with such NASD filings and
Blue Sky qualifications); and all other expenses directly incurred by the
Company and the Selling Shareholder in connection with the performance of their
obligations hereunder. Any additional expenses incurred as a result of the sale
of the Shares by the Selling Shareholders will be borne collectively by the
Company and the Selling Shareholders. The provisions of this Section 5(a)(i) are
intended to relieve the Underwriters from the payment of the expenses and costs
which the Selling Shareholders and the Company hereby agree to pay, but shall
not affect any agreement which the Selling Shareholders and the Company may
make, or may have made, for the sharing of any of such expenses and costs. Such
agreements shall not impair the obligations of the Company and the Selling
Shareholders hereunder to the several Underwriters.


                                      -15-
<PAGE>   16
                        (ii)  In addition to its other obligations under Section
8(a) hereof, the Company agrees that, as an interim measure during the pendency
of any claim, action, investigation, inquiry or other proceeding described in
Section 8(a) hereof, it will reimburse the Underwriters on a monthly basis for
all reasonable legal or other expenses incurred in connection with investigating
or defending any such claim, action, investigation, inquiry or other proceeding,
notwithstanding the absence of a judicial determination as to the propriety and
enforceability of the Company's obligation to reimburse the Underwriters for
such expenses and the possibility that such payments might later be held to have
been improper by a court of competent jurisdiction. To the extent that any such
interim reimbursement payment is so held to have been improper, the Underwriters
shall promptly return such payment to the Company together with interest,
compounded daily, determined on the basis of the prime rate (or other commercial
lending rate for borrowers of the highest credit standing) listed from time to
time in The Wall Street Journal which represents the base rate on corporate
loans posted by a substantial majority of the nation's thirty (30) largest banks
(the "Prime Rate"). Any such interim reimbursement payments which are not made
to the Underwriters within thirty (30) days of a request for reimbursement shall
bear interest at the Prime Rate from the date of such request.

                        (iii) In addition to their other obligations under
Section 8(b) hereof, each Selling Shareholder agrees that, as an interim measure
during the pendency of any claim, action, investigation, inquiry or other
proceeding described in Section 8(b) hereof relating to such Selling
Shareholder, it will reimburse the Underwriters on a monthly basis for all
reasonable legal or other expenses incurred in connection with investigating or
defending any such claim, action, investigation, inquiry or other proceeding,
notwithstanding the absence of a judicial determination as to the propriety and
enforceability of such Selling Shareholder's obligation to reimburse the
Underwriters for such expenses and the possibility that such payments might
later be held to have been improper by a court of competent jurisdiction. To the
extent that any such interim reimbursement payment is so held to have been
improper, the Underwriters shall promptly return such payment to the Selling
Shareholders together with interest, compounded daily, determined on the basis
of the Prime Rate. Any such interim reimbursement payments which are not made to
the Underwriters within thirty (30) days of a request for reimbursement shall
bear interest at the Prime Rate from the date of such request.

                  (b)   In addition to their other obligations under Section
8(c) hereof, the Underwriters severally and not jointly agree that, as an
interim measure during the pendency of any claim, action, investigation, inquiry
or other proceeding described in Section 8(c) hereof, they will reimburse the
Company and each Selling Shareholder on a monthly basis for all reasonable legal
or other expenses incurred in connection with investigating or defending any
such claim, action, investigation, inquiry or other proceeding, notwithstanding
the absence of a judicial determination as to the propriety and enforceability
of the Underwriters' obligation to reimburse the Company and each such Selling
Shareholder for such expenses and the possibility that such payments might later
be held to have been improper by a court of competent jurisdiction. To the
extent that any such interim reimbursement payment is so held to have been
improper, the Company and each such Selling Shareholder shall promptly return
such payment to the Underwriters together with interest, compounded daily,
determined on the basis of the Prime Rate. Any such interim reimbursement
payments which are not made to the Company and each such Selling Shareholder
within thirty (30) days of a request for reimbursement shall bear interest at
the Prime Rate from the date of such request.

                  (c)   It is agreed that any controversy arising out of the
operation of the interim reimbursement arrangements set forth in Sections
5(a)(ii), 5(a)(iii) and 5(b) hereof, including the amounts of any requested
reimbursement payments, the method of determining such amounts and the basis on
which such amounts shall be apportioned among the reimbursing parties, shall be
settled by arbitration conducted under the provisions of the Constitution and
Rules of the Board of Governors of the New York Stock Exchange, Inc. or pursuant
to the Code of Arbitration Procedure of the NASD. Any such arbitration must be
commenced by service of a written demand for arbitration or a written notice of
intention to arbitrate, therein electing the arbitration tribunal. In the event
the party demanding arbitration does not make such designation of an arbitration
tribunal in such demand or notice, then the party responding to said demand or
notice is authorized 


                                      -16-
<PAGE>   17
to do so. Any such arbitration will be limited to the operation of the interim
reimbursement provisions contained in Sections 5(a)(ii), 5(a)(iii) and 5(b)
hereof and will not resolve the ultimate propriety or enforceability of the
obligation to indemnify for expenses which is created by the provisions of
Sections 8(a), 8(b) and 8(c) hereof or the obligation to contribute to expenses
which is created by the provisions of Section 8(e) hereof.

      6.    Conditions of Underwriters' Obligations. The obligations of the
several Underwriters to purchase and pay for the Shares as provided herein shall
be subject to the accuracy, as of the date hereof and the Closing Date and any
later date on which Option Shares are to be purchased, as the case may be, of
the representations and warranties of the Company and the Selling Shareholders
herein, to the performance by the Company and the Selling Shareholders of their
respective obligations hereunder and to the following additional conditions:

                  (a)   The Registration Statement shall have become effective
not later than 2:00 P.M., San Francisco time, on the date following the date of
this Agreement, or such later date as shall be consented to in writing by you;
and no stop order suspending the effectiveness thereof shall have been issued
and no proceedings for that purpose shall have been initiated or, to the
knowledge of the Company, any Selling Shareholder or any Underwriter, threatened
by the Commission, and any request of the Commission for additional information
(to be included in the Registration Statement or the Prospectus or otherwise)
shall have been complied with to the satisfaction of Underwriters' Counsel.

                  (b)   All corporate proceedings and other legal matters in
connection with this Agreement, the form of Registration Statement and the
Prospectus, and the registration, authorization, issue, sale and delivery of the
Shares, shall have been reasonably satisfactory to Underwriters' Counsel, and
such counsel shall have been furnished with such papers and information as they
may reasonably have requested to enable them to pass upon the matters referred
to in this Section.

                  (c)   Subsequent to the execution and delivery of this
Agreement and prior to the Closing Date, or any later date on which Option
Shares are to be purchased, as the case may be, there shall not have been any
change in the condition (financial or otherwise), earnings, operations, business
or business prospects (as described in the Registration Statement and
Prospectus) of the Company from that set forth in the Registration Statement or
Prospectus, which, in your reasonable judgment, is material and adverse and that
makes it, in your reasonable judgment, impracticable or inadvisable to proceed
with the public offering of the Shares as contemplated by the Prospectus.

                  (d)   You shall have received on the Closing Date and on any
later date on which Option Shares are to be purchased, as the case may be, the
following opinion of counsel for the Company and the Selling Shareholders, dated
the Closing Date or such later date on which Option Shares are to be purchased
addressed to the Underwriters and with reproduced copies or signed counterparts
thereof for each of the Underwriters, to the effect that:

                        (i)   The Company has been duly incorporated and is
            validly existing as a corporation in good standing under the laws of
            the State of California;

                        (ii)  The Company has the corporate power and authority
            to own, lease and operate its properties and to conduct its business
            as described in the Prospectus;

                        (iii) The Company is duly qualified to do business as a
            foreign corporation and is in good standing in each jurisdiction, if
            any, in which the ownership or leasing of its properties or the
            conduct of its business requires such qualification, except where
            the failure to be so qualified or be in good standing would not have
            a material adverse effect on the condition (financial or otherwise),
            earnings, operations or business of the Company. To such counsel's
            knowledge, the 


                                      -17-
<PAGE>   18
            Company does not own or control, directly or indirectly, any
            corporation, association or other entity other than 3Dfx
            Interactive, a corporation formed under the laws of Grand Cayman,
            B.W.I., which was formed in _________, 1998, does not own, lease or
            operate any property and has not conducted any business since
            inception;

                        (iv)  The authorized, issued and outstanding capital
            stock of the Company is as set forth in the Prospectus under the
            caption "Capitalization" as of the dates stated therein, the issued
            and outstanding shares of capital stock of the Company (including
            the Selling Shareholder Shares) have been duly and validly issued
            and are fully paid and nonassessable, and, to such counsel's
            knowledge, will not have been issued in violation of or subject to
            any preemptive right, co-sale right, registration right, right of
            first refusal or other similar right of shareholders;

                        (v)   The Firm Shares or the Option Shares, as the case
            may be, to be issued by the Company pursuant to the terms of this
            Agreement have been duly authorized and, upon issuance and delivery
            against payment therefor in accordance with the terms hereof, will
            be duly and validly issued and fully paid and nonassessable, and, to
            such counsel's knowledge, will not have been issued in violation of
            or subject to any preemptive right, co-sale right, registration
            right, right of first refusal or other similar right of
            shareholders;

                        (vi)  The Company has the corporate power and authority
            to enter into this Agreement and to issue, sell and deliver to the
            Underwriters the Shares to be issued and sold by it hereunder;

                        (vii) This Agreement has been duly authorized by all
            necessary corporate action on the part of the Company and has been
            duly executed and delivered by the Company and, assuming due
            authorization, execution and delivery by you, is a valid and binding
            agreement of the Company, enforceable in accordance with its terms,
            except insofar as indemnification provisions may be limited by
            applicable law and except as enforceability may be limited by
            bankruptcy, insolvency, reorganization, moratorium or similar laws
            relating to or affecting creditors' rights generally or by general
            equitable principles;

                        (viii) The Registration Statement has become effective
            under the Act and, to such counsel's knowledge, no stop order
            suspending the effectiveness of the Registration Statement has been
            issued and no proceedings for that purpose have been instituted or
            are pending or threatened under the Act;

                        (ix)  The Registration Statement and the Prospectus, and
            each amendment or supplement thereto (other than the financial
            statements (including supporting schedules) and financial data
            derived therefrom as to which such counsel need express no opinion),
            as of the effective date of the Registration Statement, complied as
            to form in all material respects with the requirements of the Act
            and the applicable Rules and Regulations;

                        (x)   The information in the Prospectus under the
            caption "Description of Capital Stock," to the extent that it
            constitutes matters of law or legal conclusions, has been reviewed
            by such counsel and is a fair summary of such matters and
            conclusions; and the forms of certificates evidencing the Common
            Stock and filed as exhibits to the Registration Statement comply
            with the law of the State of California;

                        (xi)  The description in the Registration Statement and
            the Prospectus of the charter and bylaws of the Company and of
            Federal statutes and the General Corporation Law of 


                                      -18-
<PAGE>   19
            the State of California are accurate summaries thereof and fairly
            present the information required to be presented by the Act and the
            applicable Rules and Regulations;

                        (xii) To such counsel's knowledge, there are no
            agreements, contracts, leases or documents to which the Company is a
            party of a character required to be described or referred to in the
            Registration Statement or Prospectus or to be filed as an exhibit to
            the Registration Statement which are not described or referred to
            therein or filed as required;

                        (xiii) The performance of this Agreement and the
            consummation of the transactions herein contemplated (other than
            performance of the Company's indemnification obligations hereunder,
            concerning which no opinion need be expressed) will not (a) result
            in any violation of the Company's charter or bylaws or (b) to such
            counsel's knowledge, result in a material breach or violation of any
            of the terms and provisions of, or constitute a material default
            under, any material bond, debenture, note or other evidence of
            indebtedness, or under any material lease, contract, indenture,
            mortgage, deed of trust, loan agreement, joint venture or other
            agreement or instrument known to such counsel to which the Company
            is a party or by which its properties are bound, or any applicable
            statute, rule or regulation known to such counsel or, to such
            counsel's knowledge, any order, writ or decree of any court,
            government or governmental agency or body having jurisdiction over
            the Company or over any of its property or operations;

                        (xiv) No consent, approval, authorization or order of or
            qualification with any court, government or governmental agency or
            body having jurisdiction over the Company, or over any of its
            properties or operations is necessary in connection with the
            consummation by the Company of the transactions herein contemplated,
            except such as have been obtained under the Act or such as may be
            required under state or other securities or Blue Sky laws in
            connection with the purchase and the distribution of the Shares by
            the Underwriters;

                        (xv)  To such counsel's knowledge, there are no legal or
            governmental proceedings pending or threatened against the Company
            of a character required to be disclosed in the Registration
            Statement or the Prospectus by the Act or the Rules and Regulations,
            other than those described therein;

                        (xvi) To such counsel's knowledge, the Company is not
            presently (a) in material violation of its charter or bylaws, or (b)
            in material breach of any applicable statute, rule or regulation
            known to such counsel or, to such counsel's knowledge, any order,
            writ or decree of any court or governmental agency or body having
            jurisdiction over the Company or over any of its properties or
            operations;

                        (xvii) To such counsel's knowledge, except as set forth
            in the Registration Statement and Prospectus, no holders of Common
            Stock or other securities of the Company have registration rights
            with respect to securities of the Company and, except as set forth
            in the Registration Statement and Prospectus, all holders of
            securities of the Company having rights known to such counsel to
            registration of such shares of Common Stock or other securities,
            because of the filing of the Registration Statement by the Company
            have, with respect to the offering contemplated thereby, waived such
            rights or such rights have expired by reason of lapse of time
            following notification of the Company's intent to file the
            Registration Statement or have included securities in the
            Registration Statement pursuant to the exercise of and in full
            satisfaction of such rights;

                        (xviii) Each Selling Shareholder which is not a natural
            person has full right, power and authority to enter into and to
            perform its obligations under the Power of Attorney and 


                                      -19-
<PAGE>   20
            Custody Agreement to be executed and delivered by it in connection
            with the transactions contemplated herein; the Power of Attorney and
            Custody Agreement of each Selling Shareholder that is not a natural
            person has been duly authorized by such Selling Shareholder; the
            Power of Attorney and Custody Agreement of each Selling Shareholder
            has been duly executed and delivered by or on behalf of such Selling
            Shareholder; and the Power of Attorney and Custody Agreement of each
            Selling Shareholder constitutes the valid and binding agreement of
            such Selling Shareholder, enforceable in accordance with its terms,
            except as the enforcement thereof may be limited by bankruptcy,
            insolvency, reorganization, moratorium or other similar laws
            relating to or affecting creditors' rights generally or by general
            equitable principles;

                        (xix) Each of the Selling Shareholders has full right,
            power and authority to enter into and to perform its obligations
            under this Agreement and to sell, transfer, assign and deliver the
            Shares to be sold by such Selling Shareholder hereunder;

                        (xx)  This Agreement has been duly authorized by each
            Selling Shareholder that is not a natural person and has been duly
            executed and delivered by or on behalf of each Selling Shareholder;
            and

                        (xxi) Upon the delivery of and payment for the Shares as
            contemplated in this Agreement, each of the Underwriters will
            receive valid marketable title to the Shares purchased by it from
            such Selling Shareholder, free and clear of any pledge, lien,
            security interest, encumbrance, claim or equitable interest. In
            rendering such opinion, such counsel may assume that the
            Underwriters are without notice of any defect in the title of the
            Shares being purchased from the Selling Shareholders.

                  In addition, such counsel shall state that such counsel has
participated in conferences with certain officers and other representatives of
the Company, including its independent certified public accountants, and with
you and your counsel, at which the contents of the Registration Statement and
Prospectus and related matters were discussed, and although they have not
verified the accuracy, completeness or fairness of such information, nothing has
come to the attention of such counsel which leads them to believe that, at the
time the Registration Statement became effective and at all times subsequent
thereto up to and on the Closing Date and on any later date on which Option
Shares are to be purchased, the Registration Statement and any amendment or
supplement thereto (other than the financial statements including supporting
schedules and other financial and statistical information derived therefrom, as
to which such counsel need express no comment) 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, or at the
Closing Date or any later date on which the Option Shares are to be purchased,
as the case may be, the Registration Statement, Prospectus and any amendment or
supplement thereto (except as aforesaid) contained any untrue statement of a
material fact or omitted to state a material fact necessary to make the
statements therein, in the light of the circumstances under which they were
made, not misleading.

                  Counsel rendering the foregoing opinion may rely as to
questions of law not involving the laws of the United States or the State of
California upon opinions of local counsel, and as to questions of fact upon
representations or certificates of officers of the Company, the Selling
Shareholders or officers of the Selling Shareholders (when the Selling
Shareholder is not a natural person) and of government officials, in which case
their opinion is to state that they are so relying and that they have no
knowledge of any material misstatement or inaccuracy in any such opinion,
representation or certificate. Copies of any opinion, representation or
certificate so relied upon shall be delivered to you, as Representatives of the
Underwriters, and to Underwriters' Counsel.


                                      -20-
<PAGE>   21
                  (e)   You shall have received on the Closing Date and on any
later date on which Option Shares are to be purchased, as the case may be, an
opinion of Brobeck, Phleger & Harrison LLP, in form and substance satisfactory
to you, with respect to the sufficiency of all such corporate proceedings and
other legal matters relating to this Agreement and the transactions contemplated
hereby as you may reasonably require, and the Company shall have furnished to
such counsel such documents as they may have requested for the purpose of
enabling them to pass upon such matters.

                  (f)   You shall have received on the Closing Date and on any
later date on which Option Shares are to be purchased, as the case may be, a
letter from Price Waterhouse LLP addressed to the Company and the Underwriters,
dated the Closing Date or such later date on which Option Shares are to be
purchased, as the case may be, confirming that they are independent certified
public accountants with respect to the Company within the meaning of the Act and
the applicable published Rules and Regulations and based upon the procedures
described in such 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 five (5) business days prior to the Closing Date or such later
date on which Option Shares are to be purchased, as the case may be, (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 on
which Option Shares are to be purchased, as the case may be, and (ii) setting
forth any revisions and additions to the statements and 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 such letter, or to reflect
the availability of more recent financial statements, data or information. The
letter shall not disclose any change in the condition (financial or otherwise),
earnings, operations, business or business prospects (as described in the
Registration Statement and Prospectus) of the Company from that set forth in the
Registration Statement or Prospectus, which, in your sole judgment, is material
and adverse and that makes it, in your sole judgment, impracticable or
inadvisable to proceed with the public offering of the Shares as contemplated by
the Prospectus. The Original Letter from shall be addressed to or for the use of
the Underwriters in form and substance satisfactory to the Underwriters and
shall (i) represent, to the extent true, that they are independent certified
public accountants with respect to the Company within the meaning of the Act and
the applicable published Rules and Regulations, (ii) set forth their opinion
with respect to their examination of the balance sheet of the Company as of
December 31, 1996 and 1997, and related statements of operations, shareholders'
equity, and cash flows for the years ended December 31, 1995, 1996 and 1997 and
(iii) address other matters agreed upon by Price Waterhouse LLP and you. In
addition, you shall have received from Price Waterhouse LLP a letter addressed
to the Company and made available to you for the use of the Underwriters stating
that their review of the Company's system of internal accounting controls, to
the extent they deemed necessary in establishing the scope of their examination
of the Company's financial statements as of December 31, 1995, 1996 and 1997 did
not disclose any weaknesses in internal controls that they considered to be
material weaknesses.

                  (g)   You shall have received on the Closing Date and on any
later date on which Option Shares are to be purchased, as the case may be, a
certificate of the Company, dated the Closing Date or such later date on which
Option Shares are to be purchased, as the case may be, signed by the Chief
Executive Officer and Chief Financial Officer of the Company, to the effect
that, and you shall be satisfied that:

                        (i)   The representations and warranties of the Company
            in this Agreement are true and correct, as if made on and as of the
            Closing Date or any later date on which Option Shares are to be
            purchased, as the case may be, and the Company has complied with all
            the agreements and satisfied all the conditions on its part to be
            performed or satisfied at or prior to the Closing Date or any later
            date on which Option Shares are to be purchased, as the case may be;


                                      -21-
<PAGE>   22
                        (ii)  No stop order suspending the effectiveness of the
            Registration Statement has been issued and, to the best of the
            Company's knowledge, no proceedings for that purpose have been
            instituted or are pending or threatened under the Act;

                        (iii) When the Registration Statement became effective
            and at all times subsequent thereto up to the delivery of such
            certificate, the Registration Statement and the Prospectus, and any
            amendments or supplements thereto, contained all material
            information required to be included therein by the Act and the Rules
            and Regulations and in all material respects conformed to the
            requirements of the Act and the Rules and Regulations, the
            Registration Statement, and any amendments or supplements thereto,
            did not and does not include any untrue statement of a material fact
            or omit to state a material fact required to be stated therein or
            necessary to make the statements therein not misleading, the
            Prospectus and any amendments or supplements thereto, did not and
            does not include any untrue statement of a material fact or omit to
            state a material fact necessary to make the statements therein, in
            the light of the circumstances under which they were made, not
            misleading, and, since the effective date of the Registration
            Statement, there has occurred no event required to be set forth in
            an amended or supplemented Prospectus which has not been so set
            forth; and

                        (iv)  Subsequent to the respective dates as of which
            information is given in the Registration Statement and Prospectus,
            there has not been (a) any material adverse change in the condition
            (financial or otherwise), earnings, operations, business or business
            prospects (as described in the Registration Statement and
            Prospectus) of the Company, (b) any transaction that is material to
            the Company, except transactions entered into in the ordinary course
            of business, (c) any obligation, direct or contingent, that is
            material to the Company, incurred by the Company, except obligations
            incurred in the ordinary course of business, (d) any change in the
            capital stock or outstanding indebtedness of the Company that is
            material to the Company, (e) any dividend or distribution of any
            kind declared, paid or made on the capital stock of the Company, or
            (f) any loss or damage (whether or not insured) to the property of
            the Company or any of its which has been sustained or will have been
            sustained which has a material adverse effect on the condition
            (financial or otherwise), earnings, operations, business or business
            prospects (as described in the Registration Statement and
            Prospectus) of the Company.

                  (h) You shall be satisfied that, and you shall have received a
certificate, dated the Closing Date from the Attorneys for each Selling
Shareholder to the effect that, as of the Closing Date, they have not been
informed that:

                        (i)   The representations and warranties made by such
            Selling Shareholder herein are not true or correct in any material
            respect on the Closing Date; or

                        (ii)  Such Selling Shareholder has not complied with any
            obligation or satisfied any condition which is required to be
            performed or satisfied on the part of such Selling Shareholder at or
            prior to the Closing Date.

                  (i)   The Company shall have obtained and delivered to you an
agreement from each officer and director of the Company, each Selling
Shareholder and each beneficial owner of shares representing at least five
percent (5%) of the Company's outstanding Common Stock in writing prior to the
date hereof that such person will not, during the Lock-up Period, effect the
Disposition of any Securities now owned or hereafter acquired directly by such
person or with respect to which such person has or hereafter acquires the power
of disposition, otherwise than (i) as a bona fide gift or gifts, provided the
donee or donees thereof agree in writing to be bound by this restriction, (ii)
as a distribution to limited partners or shareholders of such person, provided
that the distributees thereof agree in writing to be bound by the terms of this
restriction, or (iii) with 


                                      -22-
<PAGE>   23
the prior written consent of BancAmerica Robertson Stephens. The foregoing
restriction is expressly agreed to preclude the holder of the Securities from
engaging in any hedging or other transaction which is designed to or reasonably
expected to lead to or result in a Disposition of Securities during the Lock-up
Period, even if such Securities would be disposed of by someone other than the
such holder. Such prohibited hedging or other transactions would including,
without limitation, any short sale (whether or not against the box) or any
purchase, sale or grant of any right (including, without limitation, any put or
call option) with respect to any Securities or with respect to any security
(other than a broad-based market basket or index) that includes, relates to or
derives any significant part of its value from Securities. The foregoing shall
not apply to any Disposition of Securities during the Lock-up Period to the
Underwriters pursuant to this Agreement. Furthermore, such person will have also
agreed and consented to the entry of stop transfer instructions with the
Company's transfer agent against the transfer of the Securities held by such
person except in compliance with this restriction.

                  (j)   The Company and the Selling Shareholders shall have
furnished to you such further certificates and documents as you shall reasonably
request (including certificates of officers of the Company, the Selling
Shareholders or officers of the Selling Shareholders (when the Selling
Shareholder is not a natural person) as to the accuracy of the representations
and warranties of the Company and the Selling Shareholders herein, as to the
performance by the Company and the Selling Shareholders of their respective
obligations hereunder and as to the other conditions concurrent and precedent to
the obligations of the Underwriters hereunder.

                  All such opinions, certificates, letters and documents will be
in compliance with the provisions hereof only if they are reasonably
satisfactory to Underwriters' Counsel. The Company and the Selling Shareholders
will furnish you with such number of conformed copies of such opinions,
certificates, letters and documents as you shall reasonably request.

      7.    Option Shares.

                  (a)   On the basis of the representations, warranties and
agreements herein contained, but subject to the terms and conditions herein set
forth, the Company hereby grants to the several Underwriters, for the purpose of
covering over-allotments in connection with the distribution and sale of the
Firm Shares only, a nontransferable option to purchase up to an aggregate of
345,000 Option Shares at the purchase price per share for the Firm Shares set
forth in Section 3 hereof. Such option may be exercised by the Representatives
on behalf of the several Underwriters on one (1) or more occasions in whole or
in part during the period of thirty (30) days after the date on which the Firm
Shares are initially offered to the public, by giving written notice to the
Company. The number of Option Shares to be purchased by each Underwriter upon
the exercise of such option shall be the same proportion of the total number of
Option Shares to be purchased by the several Underwriters pursuant to the
exercise of such option as the number of Firm Shares purchased by such
Underwriter (set forth in Schedule A hereto) bears to the total number of Firm
Shares purchased by the several Underwriters (set forth in Schedule A hereto),
adjusted by the Representatives in such manner as to avoid fractional shares.

                  Delivery of definitive certificates for the Option Shares to
be purchased by the several Underwriters pursuant to the exercise of the option
granted by this Section 7 shall be made against receipt of a wire transfer
reference number issued by the Federal Reserve System evidencing payment of the
purchase price therefor by the several Underwriters by wire transfer of
immediately available funds, to an account specified in writing by the Company
with regard to the Shares being purchased from the Company. In the event of any
breach of the foregoing, the Company shall reimburse the Underwriters for the
interest lost and any other expenses borne by them by reason of such breach.
Such delivery and payment shall take place at the offices of Wilson Sonsini
Goodrich & Rosati, 650 Page Mill Road, Palo Alto, California 94304, or at such
other place as may be agreed upon among the Representatives and the Company (i)
on the Closing Date, if written notice of the exercise of such option is
received by the Company at least two (2) full business days prior to the Closing



                                      -23-
<PAGE>   24
Date, or (ii) on a date which shall not be later than the third (3rd) full
business day following the date the Company receives written notice of the
exercise of such option, if such notice is received by the Company less than two
(2) full business days prior to the Closing Date.

                  The certificates for the Option Shares to be so delivered will
be made available to you at such office or such other location including,
without limitation, in New York City, as you may reasonably request for checking
at least one (1) full business day prior to the date of payment and delivery and
will be in such names and denominations as you may request, such request to be
made at least two (2) full business days prior to such date of payment and
delivery. If the Representatives so elect, delivery of the Option Shares may be
made by credit through full fast transfer to the accounts at The Depository
Trust Company designated by the Representatives.

                  It is understood that you, individually, and not as the
Representatives of the several Underwriters, may (but shall not be obligated to)
make payment of the purchase price on behalf of any Underwriter or Underwriters
whose wire transfer funds shall not have been received by you prior to the date
of payment and delivery for the Option Shares to be purchased by such
Underwriter or Underwriters. Any such payment by you shall not relieve any such
Underwriter or Underwriters of any of its or their obligations hereunder.

                  (b)   Upon exercise of any option provided for in Section 7(a)
hereof, the obligations of the several Underwriters to purchase such Option
Shares will be subject (as of the date hereof and as of the date of payment and
delivery for such Option Shares) to the accuracy of and compliance with the
representations, warranties and agreements of the Company herein, to the
accuracy of the statements of the Company and officers of the Company made
pursuant to the provisions hereof, to the performance by the Company of its
obligations hereunder, to the conditions set forth in Section 6 hereof, and to
the condition that all proceedings taken at or prior to the payment date in
connection with the sale and transfer of such Option Shares shall be reasonably
satisfactory in form and substance to you and to Underwriters' Counsel, and you
shall have been furnished with all such documents, certificates and opinions as
you may reasonably request in order to evidence the accuracy and completeness of
any of the representations, warranties or statements, the performance of any of
the covenants or agreements of the Company or the compliance with any of the
conditions herein contained.

      8.    Indemnification and Contribution.

                  (a)   The Company agrees to indemnify and hold harmless each
Underwriter against any losses, claims, damages or liabilities, joint or
several, to which such Underwriter may become subject (including without
limitation, in its capacity as an Underwriter or as a "qualified independent
underwriter" within the meaning of Schedule E of the Bylaws of NASD), under the
Act, the Exchange Act, or otherwise, specifically including, but not limited to,
losses, claims, damages or liabilities (or actions in respect thereof) arising
out of or based upon (i) any breach of any representation, warranty, agreement
or covenant of the Company herein contained, (ii) any untrue statement or
alleged untrue statement of any material fact contained in the Registration
Statement, or any amendment or supplement thereto, 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 (iii) any untrue
statement or alleged untrue statement of any material fact contained in any
Preliminary Prospectus or the Prospectus or any amendment or supplement thereto,
or the omission or alleged omission to state therein a material fact required to
be stated therein or necessary to make the statements therein, in the light of
the circumstances under which they were made, not misleading, and agrees to
reimburse each Underwriter for any legal or other expenses reasonably incurred
by it in connection with investigating or defending any such loss, claim,
damage, liability or action; provided, however, that the Company shall not be
liable in any such case to the extent that any such loss, claim, damage,
liability or action arises out of or is based upon an untrue statement or
alleged untrue statement or omission or alleged omission made in the
Registration Statement, such Preliminary Prospectus or the Prospectus, or any
amendment or supplement thereto, in reliance 


                                      -24-
<PAGE>   25
upon, and in conformity with, written information relating to any Underwriter
furnished to the Company by such Underwriter, directly or through you,
specifically for use in the preparation thereof and, provided further, that the
indemnity agreement provided in this Section 8(a) with respect to any
Preliminary Prospectus shall not inure to the benefit of any Underwriter from
whom the person asserting any losses, claims, damages, liabilities or actions
based upon any untrue statement or alleged untrue statement of material fact or
omission or alleged omission to state therein a material fact purchased Shares,
if a copy of the Prospectus in which such untrue statement or alleged untrue
statement or omission or alleged omission was corrected had not been sent or
given to such person within the time required by the Act and the Rules and
Regulations, unless such failure is the result of noncompliance by the Company
with Section 4(d) hereof.

                  The indemnity agreement in this Section 8(a) shall extend upon
the same terms and conditions to, and shall inure to the benefit of, each
person, if any, who controls any Underwriter within the meaning of the Act or
the Exchange Act. This indemnity agreement shall be in addition to any
liabilities which the Company may otherwise have.

                  (b)   Each Selling Shareholder, severally and not jointly,
agrees to indemnify and hold harmless each Underwriter against any losses,
claims, damages or liabilities, joint or several, to which such Underwriter may
become subject (including, without limitation, in its capacity as an Underwriter
or as a "qualified independent underwriter" within the meaning of Schedule E or
the Bylaws of the NASD) under the Act, the Exchange Act or otherwise,
specifically including, but not limited to, losses, claims, damages or
liabilities (or actions in respect thereof) arising out of or based upon (i) any
breach of any representation, warranty, agreement or covenant of such Selling
Shareholder herein contained, (ii) any untrue statement or alleged untrue
statement of any material fact contained in the Registration Statement or any
amendment or supplement thereto, 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 (iii) any untrue statement or alleged
untrue statement of any material fact contained in any Preliminary Prospectus or
the Prospectus or any amendment or supplement thereto, or the omission or
alleged omission to state therein a material fact necessary to make the
statements therein, in the light of the circumstances under which they were
made, not misleading, in the case of subparagraphs (ii) and (iii) of this
Section 8(b) to the extent, but only to the extent, that such untrue statement
or alleged untrue statement or omission or alleged omission was made in
reliance upon and in conformity with written information furnished to the
Company or such Underwriter by such Selling Shareholder, directly or through
such Selling Shareholder's representatives, specifically for use in the
preparation thereof, and agrees to reimburse each Underwriter for any legal or
other expenses reasonably incurred by it in connection with investigating or
defending any such loss, claim, damage, liability or action; provided, however,
that the indemnity agreement provided in this Section 8(b) with respect to any
Preliminary Prospectus shall not inure to the benefit of any Underwriter from
whom the person asserting any losses, claims, damages, liabilities or actions
based upon any untrue statement or alleged untrue statement of a material fact
or omission or alleged omission to state therein a material fact purchased
Shares, if a copy of the Prospectus in which such untrue statement or alleged
untrue statement or omission or alleged omission was corrected had not been sent
or given to such person within the time required by the Act and the Rules and
Regulations, unless such failure is the result of noncompliance by the Company
with Section 4(d) hereof.

            The indemnity agreement in this Section 8(b) shall extend upon the
same terms and conditions to, and shall inure to the benefit of, each person, if
any, who controls any Underwriter within the meaning of the Act or the Exchange
Act. This indemnity agreement shall be in addition to any liabilities which such
Selling Shareholder may otherwise have.

                  (c)   Each Underwriter, severally and not jointly, agrees to
indemnify and hold harmless the Company and each Selling Shareholder against any
losses, claims, damages or liabilities, joint or several, to which the Company
or such Selling Shareholder may become subject under the Act, the Exchange Act,
or otherwise, specifically including, but not limited to, losses, claims,
damages or liabilities (or actions in respect 


                                      -25-
<PAGE>   26
thereof) arising out of or based upon (i) any breach of any representation,
warranty, agreement or covenant of such Underwriter herein contained, (ii) any
untrue statement or alleged untrue statement of any material fact contained in
the Registration Statement or any amendment or supplement thereto, 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
(iii) any untrue statement or alleged untrue statement of any material fact
contained in any Preliminary Prospectus or the Prospectus or any amendment or
supplement thereto, or the omission or alleged omission to state therein a
material fact necessary to make the statements therein, in the light of the
circumstances under which they were made, not misleading, in the case of
subparagraphs (ii) and (iii) of this Section 8(c) to the extent, but only to the
extent, that such untrue statement or alleged untrue statement or omission or
alleged omission was made in reliance upon and in conformity with written
information furnished to the Company by such Underwriter, directly or through
you, specifically for use in the preparation thereof, and agrees to reimburse
the Company and each such Selling Shareholder for any legal or other expenses
reasonably incurred by the Company and each such Selling Shareholder in
connection with investigating or defending any such loss, claim, damage,
liability or action.

            The indemnity agreement in this Section 8(c) shall extend upon the
same terms and conditions to, and shall inure to the benefit of, each officer of
the Company who signed the Registration Statement and each director of the
Company, each Selling Shareholder and each person, if any, who controls the
Company or any Selling Shareholder within the meaning of the Act or the Exchange
Act. This indemnity agreement shall be in addition to any liabilities which each
Underwriter may otherwise have.

                  (d)   Promptly after receipt by an indemnified party under
this Section 8 of notice of the commencement of any action, such indemnified
party shall, if a claim in respect thereof is to be made against any
indemnifying party under this Section 8, notify the indemnifying party in
writing of the commencement thereof but the omission so to notify the
indemnifying party will not relieve it from any liability which it may have to
any indemnified party otherwise than under this Section 8. In case any such
action is brought against any indemnified party, and it notified the
indemnifying party of the commencement thereof, the indemnifying party will be
entitled to participate therein and, to the extent that it shall elect by
written notice delivered to the indemnified party promptly after receiving the
aforesaid notice from such indemnified party, to assume the defense thereof,
with counsel reasonably satisfactory to such indemnified party; provided,
however, that if the defendants in any such action include both the indemnified
party and the indemnifying party and the indemnified party shall have reasonably
concluded that there may be legal defenses available to it and/or other
indemnified parties which are different from or additional to those available to
the indemnifying party, the indemnified party or parties shall have the right to
select separate counsel to assume such legal defenses and to otherwise
participate in the defense of such action on behalf of such indemnified party or
parties. Upon receipt of notice from the indemnifying party to such indemnified
party of the indemnifying party's election so to assume the defense of such
action and approval by the indemnified party of counsel, the indemnifying party
will not be liable to such indemnified party under this Section 8 for any legal
or other expenses subsequently incurred by such indemnified party in connection
with the defense thereof unless (i) the indemnified party shall have employed
separate counsel in accordance with the proviso to the next preceding sentence
(it being understood, however, that the indemnifying party shall not be liable
for the expenses of more than one separate counsel (together with appropriate
local counsel) approved by the indemnifying party representing all the
indemnified parties under Section 8(a), 8(b) or 8(c) hereof who are parties to
such action), (ii) the indemnifying party shall not have employed counsel
satisfactory to the indemnified party to represent the indemnified party within
a reasonable time after notice of commencement of the action or (iii) the
indemnifying party has authorized the employment of counsel for the indemnified
party at the expense of the indemnifying party. In no event shall any
indemnifying party be liable in respect of any amounts paid in settlement of any
action unless the indemnifying party shall have approved the terms of such
settlement; provided that such consent shall not be unreasonably withheld. No
indemnifying party shall, without the prior written consent of the indemnified
party, effect any settlement of any pending or threatened proceeding in respect
of which any indemnified party is or could have been a party and indemnification
could have been sought hereunder by such 


                                      -26-
<PAGE>   27
indemnified party, unless such settlement includes an unconditional release of
such indemnified party from all liability on all claims that are the subject
matter of such proceeding.

                  (e)   In order to provide for just and equitable contribution
in any action in which a claim for indemnification is made pursuant to this
Section 8 but it is judicially determined (by the entry of a final judgment or
decree by a court of competent jurisdiction and the expiration of time to appeal
or the denial of the last right of appeal) that such indemnification may not be
enforced in such case notwithstanding the fact that this Section 8 provides for
indemnification in such case, all the parties hereto shall contribute to the
aggregate losses, claims, damages or liabilities to which they may be subject
(after contribution from others) in such proportion so that, except as set forth
in Section 8( ) hereof, the Underwriters severally and not jointly are
responsible pro rata for the portion represented by the percentage that the
underwriting discount bears to the initial public offering price, and the
Company and the Selling Shareholders are responsible for the remaining portion,
provided, however, that (i) no Underwriter shall be required to contribute any
amount in excess of the amount by which the underwriting discount applicable to
the Shares purchased by such Underwriter exceeds of the amount of damages which
such Underwriter has otherwise required to pay and (ii) no person guilty of a
fraudulent misrepresentation (within the meaning of Section 11(f) of the Act)
shall be entitled to contribution from any person who is not guilty of such
fraudulent misrepresentation. The contribution agreement in this Section 8(e)
shall extend upon the same terms and conditions to, and shall inure to the
benefit of, each person, if any, who controls any Underwriters, the Company or
any Selling Shareholder within the meaning of the Act or the Exchange Act and
each officer of the Company who signed the Registration Statement and each
director of the Company.

                  (f)   The liability of each Selling Shareholder under the
representations, warranties and agreements contained herein and under the
indemnity agreements contained in the provisions of this Section 8 shall be
limited to an amount equal to the initial public offering price of the Selling
Shareholder Shares sold by such Selling Shareholder to the Underwriters minus
the amount of the underwriting discount paid thereon to the Underwriters by such
Selling Shareholder. The Company and such Selling Shareholders 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.

                  (g)   The parties to this Agreement hereby acknowledge that
they are sophisticated business persons who were represented by counsel during
the negotiations regarding the provisions hereof including, without limitation,
the provisions of this Section 8, and are fully informed regarding said
provisions. They further acknowledge that the provisions of this Section 8
fairly allocate the risks in light of the ability of the parties to investigate
the Company and its business in order to assure that adequate disclosure is made
in the Registration Statement and Prospectus as required by the Act and the
Exchange Act.

      9.    Representations, Warranties, Covenants and Agreements to Survive
Delivery. All representations, warranties, covenants and agreements of the
Company, the Selling Shareholders and the Underwriters herein or in certificates
delivered pursuant hereto, and the indemnity and contribution agreements
contained in Section 8 hereof shall remain operative and in full force and
effect regardless of any investigation made by or on behalf of any Underwriter
or any person controlling any Underwriter within the meaning of the Act or the
Exchange Act, or by or on behalf of the Company or any Selling Shareholder or
any of their officers, directors or controlling persons within the meaning of
the Act or the Exchange Act, and shall survive the delivery of the Shares to the
several Underwriters hereunder or termination of this Agreement.

      10.   Substitution of Underwriters. If any Underwriter or Underwriters
shall fail to take up and pay for the number of Firm Shares agreed by such
Underwriter or Underwriters to be purchased hereunder upon tender of such Firm
Shares in accordance with the terms hereof, and if the aggregate number of Firm
Shares which such defaulting Underwriter or Underwriters so agreed but failed to
purchase does not exceed 10% of the Firm 


                                      -27-
<PAGE>   28
Shares, the remaining Underwriters shall be obligated, severally in proportion
to their respective commitments hereunder, to take up and pay for the Firm
Shares of such defaulting Underwriter or Underwriters.

            If any Underwriter or Underwriters so defaults and the aggregate
number of Firm Shares which such defaulting Underwriter or Underwriters agreed
but failed to take up and pay for exceeds 10% of the Firm Shares, the remaining
Underwriters shall have the right, but shall not be obligated, to take up and
pay for (in such proportions as may be agreed upon among them) the Firm Shares
which the defaulting Underwriter or Underwriters so agreed but failed to
purchase. If such remaining Underwriters do not, at the Closing Date, take up
and pay for the Firm Shares which the defaulting Underwriter or Underwriters so
agreed but failed to purchase, the Closing Date shall be postponed for
twenty-four (24) hours to allow the several Underwriters the privilege of
substituting within twenty-four (24) hours (including non-business hours)
another underwriter or underwriters (which may include any nondefaulting
Underwriter) satisfactory to the Company. If no such underwriter or underwriters
shall have been substituted as aforesaid by such postponed Closing Date, the
Closing Date may, at the option of the Company, be postponed for a further
twenty-four (24) hours, if necessary, to allow the Company the privilege of
finding another underwriter or underwriters, satisfactory to you, to purchase
the Firm Shares which the defaulting Underwriter or Underwriters so agreed but
failed to purchase. If it shall be arranged for the remaining Underwriters or
substituted underwriter or underwriters to take up the Firm Shares of the
defaulting Underwriter or Underwriters as provided in this Section 10, (i) the
Company shall have the right to postpone the time of delivery for a period of
not more than seven (7) full business days, in order to effect whatever changes
may thereby be made necessary in the Registration Statement or the Prospectus,
or in any other documents or arrangements, and the Company agrees promptly to
file any amendments to the Registration Statement, supplements to the Prospectus
or other such documents which may thereby be made necessary, and (ii) the
respective number of Firm Shares to be purchased by the remaining Underwriters
and substituted underwriter or underwriters shall be taken as the basis of their
underwriting obligation. If the remaining Underwriters shall not take up and pay
for all such Firm Shares so agreed to be purchased by the defaulting Underwriter
or Underwriters or substitute another underwriter or underwriters as aforesaid
and the Company shall not find or shall not elect to seek another underwriter or
underwriters for such Firm Shares as aforesaid, then this Agreement shall
terminate.

            In the event of any termination of this Agreement pursuant to the
preceding paragraph of this Section 10, neither the Company or any Selling
Shareholder shall be liable to any Underwriter (except as provided in Sections 5
and 8 hereof) nor shall any Underwriter (other than an Underwriter who shall
have failed, otherwise than for some reason permitted under this Agreement, to
purchase the number of Firm Shares agreed by such Underwriter to be purchased
hereunder, which Underwriter shall remain liable to the Company, the Selling
Shareholder and the other Underwriters for damages, if any, resulting from such
default) be liable to the Company or any Selling Shareholder (except to the
extent provided in Sections 5 and 8 hereof).

            The term "Underwriter" in this Agreement shall include any person
substituted for an Underwriter under this Section 10.

      11.   Effective Date of this Agreement and Termination.

                  (a)   This Agreement shall become effective at the earlier of
(i) 6:30 A.M., San Francisco time, on the first full business day following the
effective date of the Registration Statement, or (ii) the time of the initial
public offering of any of the Shares by the Underwriters after the Registration
Statement becomes effective. The time of the initial public offering shall mean
the time of the release by you, for publication, of the first newspaper
advertisement relating to the Shares, or the time at which the Shares are first
generally offered by the Underwriters to the public by letter, telephone,
telegram or telecopy, whichever shall first occur. By giving notice as set forth
in Section 12 before the time this Agreement becomes effective, you, as
Representatives of the several Underwriters, or the Company, may prevent this
Agreement from becoming effective without liability of any party to any other
party, except as provided in Sections 4(j), 5 and 8 hereof.


                                      -28-
<PAGE>   29
                  (b)   You, as Representatives of the several Underwriters,
shall have the right to terminate this Agreement by giving notice as hereinafter
specified at any time on or prior to the Closing Date or on or prior to any
later date on which Option Shares are to be purchased, as the case may be, (i)
if the Company or any Selling Shareholder shall have failed, refused or been
unable to perform any agreement on its part to be performed, or because any
other condition of the Underwriters' obligations hereunder required to be
fulfilled is not fulfilled, including, without limitation, any change in the
condition (financial or otherwise), earnings, operations, business or business
prospects (as described in the Registration Statement and Prospectus) of the
Company from that set forth in the Registration Statement or Prospectus, which,
in your reasonable judgment, is material and adverse, or (ii) if additional
material governmental restrictions, not in force and effect on the date hereof,
shall have been imposed upon trading in securities generally or minimum or
maximum prices shall have been generally established on the New York Stock
Exchange or on the American Stock Exchange or in the over the counter market by
the NASD, or trading in securities generally shall have been suspended on either
such exchange or in the over the counter market by the NASD, or if a banking
moratorium shall have been declared by federal, New York or California
authorities, or (iii) if the Company shall have sustained a loss by strike,
fire, flood, earthquake, accident or other calamity of such character as to
interfere materially with the conduct of the business and operations of the
Company regardless of whether or not such loss shall have been insured, or (iv)
if there shall have been a material adverse change in the general political or
economic conditions or financial markets as in your reasonable judgment makes it
inadvisable or impracticable to proceed with the offering, sale and delivery of
the Shares, or (v) if there shall have been an outbreak or escalation of
hostilities or of any other insurrection or armed conflict or the declaration by
the United States of a national emergency which, in the reasonable opinion of
the Representatives, makes it impracticable or inadvisable to proceed with the
public offering of the Shares as contemplated by the Prospectus. In the event of
termination pursuant to subparagraph (i) above, the Company shall remain
obligated to pay costs and expenses pursuant to Sections 4(j), 5 and 8 hereof.
Any termination pursuant to any of subparagraphs (ii) through (v) above shall be
without liability of any party to any other party except as provided in Sections
5 and 8 hereof.

            If you elect to prevent this Agreement from becoming effective or to
terminate this Agreement as provided in this Section 11, you shall promptly
notify the Company by telephone, telecopy or telegram, in each case confirmed by
letter. If the Company shall elect to prevent this Agreement from becoming
effective, the Company shall promptly notify you by telephone, telecopy or
telegram, in each case, confirmed by letter.

      12.   Notices. All notices or communications hereunder, except as herein
otherwise specifically provided, shall be in writing and if sent to you shall be
mailed, delivered, telegraphed (and confirmed by letter) or telecopied (and
confirmed by letter) to you c/o BancAmerica Robertson Stephens, 555 California
Street, Suite 2600, San Francisco, California 94104, telecopier number (415)
781-0278, Attention: General Counsel with a copy to Brobeck, Phleger & Harrison
LLP, Two Embarcadero Place, 2200 Geng Road, Palo Alto, California 94303,
Attention: Thomas A. Bevilacqua, Esq.; if sent to the Company, such notice shall
be mailed, delivered, telegraphed (and confirmed by letter) or telecopied (and
confirmed by letter) to the Company c/o 3Dfx Interactive, Inc., 4435 Fortan
Drive, San Jose, California 95134, telecopier number (408) 262-8874, Attention:
L. Gregory Ballard, Chief Executive Officer with a copy to Wilson Sonsini
Goodrich & Rosati, 650 Page Mill Road, Palo Alto, California 94304, Attention:
Robert P. Latta, Esq.; if sent to one or more of the Selling Shareholders, such
notice shall be sent mailed, delivered, telegraphed (and confirmed by letter) or
telecopied (and confirmed by letter) to [NAME OF ATTORNEY-IN-FACT FOR SELLING
SHAREHOLDERS], as Attorney-in-Fact for the Selling Shareholders, at [ADDRESS OF
ATTORNEY-IN-FACT], telecopier number (___) ________].

      13.   Parties. This Agreement shall inure to the benefit of and be binding
upon the several Underwriters and the Company and the Selling Shareholders and
their respective executors, administrators, successors and assigns. Nothing
expressed or mentioned in this Agreement is intended or shall be construed to
give any person or entity, other than the parties hereto and their respective
executors, administrators, successors and assigns, and the controlling persons
within the meaning of the Act or the Exchange Act, officers and 


                                      -29-
<PAGE>   30
directors referred to in Section 8 hereof, any legal or equitable right, remedy
or claim in respect of this Agreement or any provisions herein contained, this
Agreement and all conditions and provisions hereof being intended to be and
being for the sole and exclusive benefit of the parties hereto and their
respective executors, administrators, successors and assigns and said
controlling persons and said officers and directors, and for the benefit of no
other person or entity. No purchaser of any of the Shares from any Underwriter
shall be construed a successor or assign by reason merely of such purchase.

            In all dealings with the Company and the Selling Shareholders under
this Agreement, you shall act on behalf of each of the several Underwriters, and
the Company or the Selling Shareholders shall be entitled to act and rely upon
any statement, request, notice or agreement made or given by you jointly or by
BancAmerica Robertson Stephens on behalf of you.

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

      15.   Counterparts. This Agreement may be signed in several counterparts,
each of which will constitute an original.


                                      -30-
<PAGE>   31
            If the foregoing correctly sets forth the understanding among the
Company, the Selling Shareholders and the several Underwriters, please so
indicate in the space provided below for that purpose, whereupon this letter
shall constitute a binding agreement among the Company, the Selling Shareholders
and the several Underwriters.

                                   Very truly yours,

                                   3DFX INTERACTIVE, INC.


                                   By  /s/ L. Gregory Ballard
                                       ----------------------------------------
                                       L. Gregory Ballard
                                       President and Chief Executive Officer


                                   SELLING SHAREHOLDERS


                                   By
                                       ----------------------------------------
                                       Attorney-in-Fact for the Selling
                                       Shareholders named in Schedule B hereto


Accepted as of the date first above written:

BANCAMERICA ROBERTSON STEPHENS
NATIONSBANC MONTGOMERY SECURITIES LLC
UBS SECURITIES LLC

On their behalf and on behalf of each of the 
several Underwriters named in Schedule A hereto.


By   BANCAMERICA ROBERTSON STEPHENS

By   [ROBERTSON, STEPHENS & COMPANY GROUP, L.L.C.]


By   /s/ Kenneth R. Fitzsimmons
     ----------------------------------------
             Authorized Signatory


                                      -31-
<PAGE>   32
                                   SCHEDULE A




                                                                Number of
                                                               Firm Shares
                                                                  To Be
                  Underwriters                                  Purchased
                  ------------                                 -----------
                                                            

BancAmerica Robertson Stephens.............................
NationsBanc Montgomery Securities LLC......................
UBS Securities LLC.........................................
     Total.................................................
                                                               ===========



<PAGE>   33
                                   SCHEDULE B




                                                                Number of
                                                               Firm Company
                                                                Shares To
                     Company                                     Be Sold
             ----------------------                            ------------
                                                            
             3Dfx Interactive, Inc.



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

     Total..................................................   ============





                                                                 Number of
                                                                  Selling
                                                                Shareholder
                                                                   Shares
           Name of Selling Shareholder                           To Be Sold
           ---------------------------                          -----------
                                                            


                                                                -----------

     Total..................................................    ===========