-10-

                                 Exhibit 4.1

                                      -11-

                              MEGATEST CORPORATION

                             1990 STOCK OPTION PLAN

                   (As amended and restated January 12, 1995)



         1. Purposes of the Plan.  The purposes of this Stock Option Plan are to
attract and retain the best  available  personnel for  positions of  substantial
responsibility, to provide additional incentive to the Employees and Consultants
of the Company and to promote the success of the Company's business.

            Options  granted  hereunder  may  be  either  Incentive  Stock
Options or  Nonstatutory  Stock  Options,  at the discretion of the Board and as
reflected in the terms of the written option agreement.

         2. Definitions.  As used herein, the following definitions shall apply:

                  (a)      "Board" shall mean the Committee, if one has been  or
the Board of Directors appointed, of the Company, if no Committee is appointed.

                  (b)      "Code" shall mean the Internal Revenue Code of 1986, 
as amended.
                  (c)      "Committee"  shall mean the  Committee  appointed by 
the Board of Directors in accordance with paragraph (a) of Section 4 of the 
Plan, if one is appointed.

                  (d)      "Common Stock" shall mean the Common Stock of the 
Company.
                  (e)      "Company" shall mean Megatest Corporation, a  
Delaware corporation.
                  (f)      "Consultant" shall mean any person who is engaged by 
the Company or any Parent or Subsidiary  to  render  consulting services  and is
compensated  for such  consulting  services,  and any  director  of the  Company
whether  compensated  for such services or not provided that if and in the event
the Company registers any class of any equity security pursuant to Section 12 of
the Securities  Exchange Act of 1934, as amended (the "Exchange  Act"), the term
Consultant  shall  thereafter not include  directors who are not compensated for
their services or are paid only a director's fee by the Company.

                  (g)      "Continuous  Status as an Employee or  Consultant" 
shall mean the absence of any  interruption or termination of service as an
Employee or Consultant. Continuous Status as an Employee or Consultant shall not
be considered  interrupted  in the case of sick leave,  military  leave,  or any
other leave of absence approved by the Board;  provided that such leave is for a
period  of not more than 90 days or  reemployment  upon the  expiration  of such
leave is guaranteed by contract or statute.

                                      -12-

                  (h)      "Employee" shall mean any person, including officers 
and  directors,  employed by the Company or any Parent or Subsidiary of the
Company.  The payment of a director's fee by the Company shall not be sufficient
to constitute "employment" by the Company.

                  (i)      "Incentive  Stock Option" shall mean an Option 
intended  to qualify as an  incentive  stock  option  within the meaning of
Section 422 of the Code.

                  (j)      "Nonstatutory Stock Option" shall mean an Option not 
intended to qualify as an Incentive Stock Option.

                  (k)      "Option" shall mean a stock option granted pursuant
to the Plan.

                  (l)      "Optioned Stock" shall mean the Common Stock subject 
to an Option.

                  (m)      "Optionee" shall mean an Employee or Consultant who 
receives an Option.

                  (n)      "Parent" shall mean a "parent corporation", whether 
now or hereafter existing, as defined in Section 424(e) of the Code.

                  (o)      "Plan" shall mean this 1990 Stock Option Plan, as 
amended from time to time.

                  (p)      "Share" shall mean a share of the Common Stock, 
as adjusted in accordance with Section a11 of the Plan.

                  (q)      "Subsidiary" shall mean a "subsidiary corporation", 
whether now or hereafter existing, as defined in Section 424(f) of the Code.

         3.       Stock Subject to the Plan.

                  (a)      Reserved Shares. Subject to the provisions of  
Section 11 of the Plan, the maximum aggregate number of shares which may be
optioned and sold under the Plan is 1,875,000 shares of Common Stock. The Shares
may be authorized, but unissued, or reacquired Common Stock.

                  (b)      Unpurchased  Shares.  If an Option should expire or 
become  unexercisable for any reason without having been exercised in full,
the unpurchased  Shares which were subject thereto shall,  unless the Plan shall
have  been  terminated,  become  available  for  future  grant  under  the Plan.
Notwithstanding  any other  provision of the Plan,  shares issued under the Plan
and later repurchased by the Company shall not become available for future grant
or sale under the Plan.

                  (c)      Annual Grant Limitation.In any fiscal year, the Board
may not grant  options  to  purchase a number of shares  greater  than five
percent (5%) of the shares of the Company's  Common Stock  outstanding the first
day of each such  fiscal  year.  The  number of shares  issuable  under  options
granted in any fiscal year shall be calculated  net of the  aggregate  number of
shares  subject to canceled,  terminated or expired  options  during such fiscal
year.  In the event  that the Board  grants  options to  purchase  less than the
aggregate number shares available for grant in a fiscal year, such deficit would
be added to the shares available for grant in the subsequent fiscal year.

                                      -13-

         4.       Administration of the Plan.

                  (a)      Procedure.

                           (i)      Multiple Administrative Bodies. If 
         permitted by Rule 16b-3, the Plan may be administered by different  
         bodies with respect to Directors, Officers who are not Directors, and
         Employees who are neither Directors nor Officers.
         
                           (ii)     Administration With Respect to Directors and
         Officers  Subject to Section 16(b).  With respect to Option grants made
         to  Employees  who are also  Officers or  Directors  subject to Section
         16(b) of the Exchange  Act, the Plan shall be  administered  by (A) the
         Board,  if the Board may  administer  the Plan in  compliance  with the
         rules  governing  a plan  intended to qualify as a  discretionary  plan
         under  Rule  16b-3,  or (B) a  committee  designated  by the  Board  to
         administer  the Plan,  which  committee  shall be constituted to comply
         with the rules  governing a plan intended to qualify as a discretionary
         plan under Rule 16b-3. Once appointed, such Committee shall continue to
         serve in its designated capacity until otherwise directed by the Board.
         From time to time the Board may increase the size of the  Committee and
         appoint additional members,  remove members (with or without cause) and
         substitute new members, fill vacancies (however caused), and remove all
         members of the Committee and thereafter  directly  administer the Plan,
         all to the extent  permitted by the rules  governing a plan intended to
         qualify as a discretionary plan under Rule 16b-3.

                           (iii)    Administration With Respect to Other Persons
         With respect to Option grants made to Employees or Consultants  who are
         neither  Directors  nor  Officers  of the  Company,  the Plan  shall be
         administered  by (A) the  Board or (B) a  committee  designated  by the
         Board,  which  committee  shall be  constituted  to  satisfy  state and
         federal  laws.  Once  appointed,  such  Committee  shall  serve  in its
         designated  capacity until otherwise  directed by the Board.  The Board
         may increase the size of the Committee and appoint additional  members,
         remove members (with or without cause) and substitute new members, fill
         vacancies (however caused), and remove all members of the Committee and
         thereafter directly administer the Plan, all to the extent permitted by
         state and federal laws.

                  (b) Powers of the Administrator.  Subject to the provisions of
the  Plan,  and in the  case of a  Committee,  subject  to the  specific  duties
delegated  by the Board to such  Committee,  the  Administrator  shall  have the
authority, in its discretion:

                           (i)      to determine the Fair Market Value of the 
         Common Stock, in accordance with Section 8(b) of the Plan;

                           (ii)     to select the Consultants and Employees to 
         whom Options may be granted hereunder;

                                      -14-

                           (iii)    to determine whether and to what extent 
         Options are granted hereunder;

                           (iv)     to determine the number of shares of Common 
         Stock to be covered by each Option granted hereunder;

                           (v)      to approve forms of agreement for use under 
         the Plan;

                           (vi)     to  determine  the  terms  and  conditions, 
         not inconsistent  with  the  terms of the Plan, of  any  award  granted
         hereunder.  Such terms and conditions include,  but are not limited to,
         the  exercise  price,  the time or times when  Options may be exercised
         (which may be based on performance criteria),  any vesting acceleration
         or waiver of forfeiture restrictions, and any restriction or limitation
         regarding  any Option or the shares of Common Stock  relating  thereto,
         based in each case on such  factors as the  Administrator,  in its sole
         discretion, shall determine;

                           (vii)    to reduce the exercise  price of any Option 
         to the then current Fair Market Value if the Fair  Market  Value of the
         Common Stock covered by such Option shall have declined  since the date
         the Option was granted;

                           (viii)   to construe and interpret the terms of the 
         Plan;         

                           (ix)     to prescribe, amend and rescind rules and 
         regulations relating to the Plan;

                           (x)      to modify or amend each Option (subject to 
         Section 13(a) of the Plan);         

                           (xi)     to authorize any person to execute on behalf
         of the Company any instrument required to effect the grant of an 
         Option  previously granted by the Administrator;

                           (xii)    to institute an Option Exchange Program;

                           (xiii)   to determine the terms and restrictions 
         applicable to Options and any Restricted Stock; and

                           (xiv)    to make all other determinations deemed 
         necessary or advisable for administering the Plan.

                  (c)      Effect of Administrator's Decision. 
The Administrator's decisions,  determinations and interpretations shall be
final and binding on all Optionees and any other holders of Options.

                                      -15-

         5.       Eligibility.

                  (a) Nonstatutory Stock Options may be granted to Employees and
Consultants.  Incentive  Stock  Options  may be granted  only to  Employees.  An
Employee or  Consultant  who has been  granted an Option may, if he is otherwise
eligible, be granted an additional Option or Options.

                  (b) Each Option  shall be  designated  in the  written  option
agreement as either an Incentive  Stock Option or a  Nonstatutory  Stock Option.
However,  notwithstanding  such  designations,  to the extent that the aggregate
fair market  value of the Shares with  respect to which  Options  designated  as
Incentive  Stock  Options  are  exercisable  for the first time by any  Optionee
during any calendar year (under all plans of the Company) exceed $100,000,  such
Options shall be treated as Nonstatutory Stock Options.

                  (c) For purposes of Section 5(b),  Options shall be taken into
account in the order in which they were  granted,  and the fair market  value of
the Shares  shall be  determined  as of the time the Option with respect to such
Shares is granted.

                  (d) The Plan shall not confer upon any Optionee any right with
respect to  continuation  of  employment  or  consulting  relationship  with the
Company, nor shall it interfere in any way with his right or the Company's right
to terminate  his  employment or consulting  relationship  at any time,  with or
without cause.

                  (e) The following limitations shall apply to grants of 
Options to Employees:

                           (i) No Employee shall be granted,  in any fiscal year
         of the Company, Options to purchase more than 250,000 Shares.

                           (ii)  In   connection   with   his  or  her   initial
         employment,  an  employee  may be granted  options to purchase up to an
         additional  250,000  shares which shall not count against the limit set
         forth in Section 5(e)(i) above.

                           (iii) The  foregoing  limitations  shall be  adjusted
         proportionately   in  connection  with  any  change  in  the  Company's
         capitalization as described in Section 11.

                           (iv) If an Option is canceled in the same fiscal year
         of the Company in which it was granted (other than in connection with a
         transaction  described  in Section  11),  the  canceled  Option will be
         counted  against  the  limit  set forth in  Section  5(e)(i).  For this
         purpose, if the exercise price of an Option is reduced, the transaction
         will be treated as a cancellation  of the Option and the grant of a new
         Option.

         6.       Term of Plan. The Plan shall become effective upon the  
earlier to occur of its  adoption by the Board of Directors or its approval
by the  stockholders  of the Company.  It shall continue in effect for a term of
ten (10) years unless sooner terminated under Section 13 of the Plan.

                                      -16-

         7. Term of Option.  The term of each  Option  shall be no more than ten
(10)  years  from the  date of  grant  thereof  or such  shorter  term as may be
provided in the Option Agreement.  However,  in the case of an Option granted to
an Optionee who, at the time the Option is granted, owns stock representing more
than ten  percent  (10%) of the  voting  power  of all  classes  of stock of the
Company or any Parent or  Subsidiary,  the term of the Option  shall be five (5)
years from the date of grant  thereof or such shorter term as may be provided in
the Option Agreement.

         8.       Exercise Price and Consideration.

                  (a) The per Share  exercise  price for the Shares to be issued
pursuant to exercise of an Option  shall be such price as is  determined  by the
Board, but shall be subject to the following:

                           (i)      In the case of an Incentive Stock Option

                                    (A)     granted to an Employee who, at the 
         time of the grant of such Incentive Stock Option, owns stock 
         representing more than ten percent (10%) of the voting power of all 
         classes of stock of the Company or any Parent or  Subsidiary,  the per 
         Share  exercise  price shall be no less than 110% of the fair market 
         value per Share on the date of grant.         

                                    (B)     granted to any Employee, the per 
         Share exercise price shall be no less than 100% of the fair market 
         value per Share on the date of grant.

                           (ii)     In the case of a Nonstatutory Stock Option

                                    (A)     granted to a person who, at the  
         time of the grant of such Option, owns stock representing more than  
         ten percent (10%) of the voting power of all classes of stock of the 
         Company or any Parent or Subsidiary, the per Share  exercise price 
         shall be no less than 110% of the fair market value per Share on the 
         date of the grant.

                                    (B)     granted to any person, the per 
         Share exercise price may be less than 100%,  but not less than 85%, of 
         the  fair market value per Share on the date of grant if the Board 
         determines  that a discount from the fair market value is appropriate  
         in lieu of the  payment of a  reasonable amount of salary or a cash 
         bonus to the optionee.
         
                           (iii) In the case of an  Option  granted  on or after
         the effective date of  registration  of any class of equity security of
         the Company pursuant to Section 12 of the Exchange Act and prior to six
         months  after  the  termination  of such  registration,  the per  Share
         exercise  price shall be no less than 100% of the fair market value per
         Share on the date of grant.

                  (b) The fair market value shall be  determined by the Board in
its discretion;  provided,  however, that where there is a public market for the
Common  Stock,  the fair market value per Share shall be the mean of the bid and
asked  prices (or the closing  price per share if the Common  Stock is listed on
the National  Association of Securities Dealers Automated  Quotation  ("NASDAQ")
National  Market) of the Common Stock for the date of grant,  as reported in the

                                      -17-

Wall Street  Journal (or, if not so reported,  as otherwise  reported by NASDAQ)
or, in the event the Common Stock is listed on a stock exchange, the fair market
value per Share shall be the closing price on such exchange on the date of grant
of the Option, as reported in the Wall Street Journal.

                  (c) The  consideration  to be paid for the Shares to be issued
upon exercise of an Option, including the method of payment, shall be determined
by the Board at the time of grant and may  consist  entirely  of (i) cash,  (ii)
check, (iii) promissory note, (iv) other Shares of Common Stock which (x) either
have  been  owned  by the  Optionee  more  than  six (6)  months  on the date of
surrender or were not acquired,  directly or indirectly,  from the Company,  and
(y) have a fair market  value on the date of  surrender  equal to the  aggregate
exercise  price of the Shares as to which said Option  shall be  exercised,  (v)
delivery  of a  properly  executed  exercise  notice  together  with such  other
documentation  as the Board and the  broker,  if  applicable,  shall  require to
effect an exercise of the Option and delivery to the Company of the sale or loan
proceeds  required  to pay the  exercise  price,  (vi) any  combination  of such
methods of payment,  or (vii) such other consideration and method of payment for
the issuance of Shares to the extent permitted under applicable law.

         9.       Exercise of Option.

                  (a)  Procedure  for  Exercise;  Rights as a  Stockholder.  Any
Option  granted  hereunder  shall be  exercisable  at such  times and under such
conditions  as  determined  by the Board,  including  performance  criteria with
respect to the Company and/or the Optionee,  and as shall be  permissible  under
the terms of the Plan.

                       An Option may not be  exercised  for a fraction  of a
Share.

                       An Option shall be deemed to be exercised when written 
notice of such  exercise has been given to the Company in  accordance  with
the terms of the Option by the person  entitled to exercise  the Option and full
payment for the Shares with  respect to which the Option is  exercised  has been
received  by the  Company.  Full  payment  may, as  authorized  by the Board and
reflected in the Option  Agreement,  consist of any  consideration and method of
payment  allowable  under  Section  8(c) of the  Plan.  Until the  issuance  (as
evidenced  by the  appropriate  entry on the books of the  Company  or of a duly
authorized  transfer agent of the Company) of the stock  certificate  evidencing
such  Shares,  no right to vote or receive  dividends  or any other  rights as a
stockholder shall exist with respect to the Optioned Stock,  notwithstanding the
exercise of the Option.  The  Company  shall issue (or cause to be issued)  such
stock  certificate  promptly upon exercise of the Option.  No adjustment will be
made for a dividend  or other  right for which the  record  date is prior to the
date the stock  certificate  is issued,  except as provided in Section 11 of the
Plan.

                       Exercise of an Option in any manner shall result in a 
decrease in the number of Shares which  thereafter  may be available,  both
for purposes of the Plan and for sale under the Option,  by the number of Shares
as to which the Option is exercised.

                                      -18-

                  (b) Termination of Status as an Employee or Consultant. In the
event of  termination  of an  Optionee's  Continuous  Status as an  Employee  or
Consultant,  such  Optionee  may, but only within sixty (60) days (or such other
period  of  time,  not  exceeding  three  (3)  months  as is  determined  by the
Administrator,  with such determination in the case of an Incentive Stock Option
being  made  at the  time  of  grant  of the  Option)  after  the  date  of such
termination  (but in no event later than the date of  expiration  of the term of
such Option as set forth in the Option  Agreement),  exercise  his Option to the
extent that he was entitled to exercise it at the date of such  termination.  To
the extent that he was not  entitled to exercise  the Option at the date of such
termination,  or if he does not exercise  such Option  (which he was entitled to
exercise) within the time specified herein, the Option shall terminate.

                  (c) Disability of Optionee.  Notwithstanding the provisions of
Section 9(b) above,  in the event of  termination  of an  Optionee's  Continuous
Status as an  Employee  or  Consultant  as a result  of his total and  permanent
disability (as defined in Section 22(e)(3) of the Code), he may, but only within
twelve (12) months from the date of such termination (but in no event later than
the date of  expiration  of the term of such  Option as set forth in the  Option
Agreement),  exercise his Option to the extent he was entitled to exercise it at
the date of such termination. To the extent that he was not entitled to exercise
the Option at the date of  termination,  or if he does not exercise  such Option
(which he was entitled to exercise) within the time specified herein, the Option
shall terminate.

                  (d) Death of Optionee.  In the event of the death of an 
Optionee:
                           (i)  during the term of the Option who is at the time
         of his death an  Employee  or  Consultant  of the Company and who shall
         have been in Continuous  Status as an Employee or Consultant  since the
         date of grant of the Option,  the Option may be exercised,  at any time
         within twelve (12) months  following the date of death (but in no event
         later  than the date of  expiration  of the term of such  Option as set
         forth in the Option Agreement), by the Optionee's estate or by a person
         who   acquired   the  right  to  exercise  the  Option  by  bequest  or
         inheritance,  but only to the  extent  the  Optionee  was  entitled  to
         exercise the Option at the date of death; or

                           (ii) within  sixty (60) days (or such other period of
         time  not   exceeding   three  (3)  months  as  is  determined  by  the
         Administrator,  with  such  determination  in the case of an  Incentive
         Stock Option  being made at the time of grant of the Option)  after the
         termination  of  Continuous  Status as an Employee or  Consultant,  the
         Option  may be  exercised,  at  any  time  within  twelve  (12)  months
         following  the date of death  (but in no event  later  than the date of
         expiration  of the  term of such  Option  as set  forth  in the  Option
         Agreement),  by the  Optionee's  estate or by a person who acquired the
         right to exercise the Option by bequest or inheritance, but only to the
         extent  of the  right  to  exercise  that  had  accrued  at the date of
         termination.

                  (e) Rule 16b-3.  Options granted to persons subject to Section
16(b) of the  Exchange  Act must comply with Rule 16b-3 and shall  contain  such
additional  conditions or restrictions as may be required  thereunder to qualify
for the maximum  exemption  from  Section 16 of the Exchange Act with respect to
Plan transactions.

                                      -19-

         10.      Non-Transferability of Options.  The Option may not be sold, 
pledged, assigned, hypothecated,  transferred, or disposed of in any manner
other  than  by  will  or by the  laws of  descent  or  distribution  and may be
exercised, during the lifetime of the Optionee, only by the Optionee.

         11.      Adjustments Upon Changes in Capitalization, Dissolution, 
                  Merger, Asset Sale or Change of Control.

                  (a) Changes in Capitalization.  Subject to any required action
by the stockholders of the Company, the number of shares of Common Stock covered
by each outstanding  Option, and the number of shares of Common Stock which have
been  authorized for issuance under the Plan but as to which no Options have yet
been  granted  or which  have been  returned  to the Plan upon  cancellation  or
expiration of an Option,  as well as the price per share of Common Stock covered
by each such  outstanding  Option,  shall be  proportionately  adjusted  for any
increase or decrease in the number of issued  shares of Common  Stock  resulting
from a  stock  split,  reverse  stock  split,  stock  dividend,  combination  or
reclassification  of the Common Stock,  or any other increase or decrease in the
number  of  issued  shares  of  Common  Stock   effected   without   receipt  of
consideration  by  the  Company;  provided,  however,  that  conversion  of  any
convertible securities of the Company shall not be deemed to have been "effected
without receipt of  consideration."  Such adjustment shall be made by the Board,
whose  determination  in that respect  shall be final,  binding and  conclusive.
Except as  expressly  provided  herein,  no issuance by the Company of shares of
stock of any class, or securities convertible into shares of stock of any class,
shall affect, and no adjustment by reason thereof shall be made with respect to,
the number or price of shares of Common Stock subject to an Option.

                  (b) Dissolution or  Liquidation.  In the event of the proposed
dissolution or liquidation of the Company,  to the extent that an Option has not
been  previously   exercised,   it  will  terminate  immediately  prior  to  the
consummation  of such proposed  action.  However,  in the event the Common Stock
becomes  listed on a national  securities  exchange or is designated or approved
for designation  upon notice of issuance as a national market system security on
an  interdealer  quotation  system by NASDAQ,  such that the exemption  provided
under  Section  25100(o) of the  California  Corporations  Code, as in effect on
January 1, 1992,  applies to the Common Stock, the Board may,  alternatively and
in the exercise of its sole discretion,  declare that any Option shall terminate
as of a date fixed by the Board and give each Optionee the right to exercise his
or her Option as to all or any part of the Optioned Stock,  including  Shares as
to which the Option would not otherwise be exercisable.

                  (c)  Merger  or Asset  Sale.  In the  event of a merger of the
Company with or into another  corporation,  or the sale of substantially  all of
the  assets of the  Company,  each  outstanding  Option  shall be  assumed or an
equivalent option or right shall be substituted by the successor  corporation or
a Parent or  Subsidiary  of the  successor  corporation.  Moreover,  subject  to
subsection (d) below, in the event the Common Stock becomes listed on a national
securities  exchange or is designated or approved for designation upon notice of
issuance as a national market system security on an interdealer quotation system
by NASDAQ,  such that the  exemption  provided  under  Section  25100(o)  of the
California  Corporations  Code, as in effect on January 1, 1992,  applies to the
Common Stock,  and in the further event that the successor  corporation does not

                                      -20-

agree to assume the Option or to substitute an equivalent  option or right,  the
Administrator shall, in lieu of such assumption or substitution, provide for the
Optionee to have the right to exercise  the Option as to all or a portion of the
Optioned  Stock,  including  Shares  as to  which  it  would  not  otherwise  be
exercisable.  If the  Administrator  makes  an  Option  exercisable  in  lieu of
assumption  or  substitution  in the  event of a merger or sale of  assets,  the
Administrator  shall  notify  the  Optionee  that  the  Option  shall  be  fully
exercisable for a period of fifteen (15) days from the date of such notice,  and
the Option will terminate  upon the expiration of such period.  For the purposes
of this  paragraph,  the Option shall be  considered  assumed if,  following the
merger or sale of assets, the option or right confers the right to purchase, for
each Share of  Optioned  Stock  subject to the Option  immediately  prior to the
merger or sale of assets,  the  consideration  (whether  stock,  cash,  or other
securities  or property)  received in the merger or sale of assets by holders of
Common Stock for each Share held on the effective date of the  transaction  (and
if holders were  offered a choice of  consideration,  the type of  consideration
chosen by the  holders  of a  majority  of the  outstanding  Shares);  provided,
however, that if such consideration received in the merger or sale of assets was
not  solely  common  stock  of the  successor  corporation  or its  Parent,  the
Administrator  may,  with  the  consent  of the  successor  corporation  and the
participant,  provide for the  consideration to be received upon the exercise of
the Option, for each Share of Optioned Stock subject to the Option, to be solely
common  stock of the  successor  corporation  or its Parent equal in fair market
value to the per share consideration  received by holders of Common Stock in the
merger or sale of assets.

         12. Time of Granting Options. The date of grant of an Option shall, for
all purposes,  be the date on which the Board makes the  determination  granting
such  Option.  Notice of the  determination  shall be given to each  Employee or
Consultant  to whom an Option is so granted  within a reasonable  time after the
date of such grant.

         13. Amendment and Termination of the Plan.

                  (a)  Amendment  and  Termination.  The  Board  may at any time
amend,  alter,  suspend or discontinue  the Plan, but no amendment,  alteration,
suspension or discontinuation shall be made which would impair the rights of any
Optionee  under any grant  theretofore  made,  without  his or her  consent.  In
addition,  to the extent necessary and desirable to comply with Rule 16b-3 under
the Exchange Act (or any other applicable law or regulation),  the Company shall
obtain stockholder approval of any Plan amendment in such a manner and to such a
degree as required.

                  (b) Effect of Amendment or Termination.  Any such amendment or
termination  of the Plan  shall not  affect  Options  already  granted  and such
Options  shall  remain  in full  force  and  effect as if this Plan had not been
amended or terminated.

         14.  Conditions  Upon  Issuance of Shares.  Shares  shall not be issued
pursuant to the exercise of an Option unless the exercise of such Option and the
issuance  and  delivery of such Shares  pursuant  thereto  shall comply with all
relevant provisions of law, including, without limitation, the Securities Act of
1933,  as amended,  the  Exchange  Act,  the rules and  regulations  promulgated
thereunder,  state  securities  laws and the  requirements of any stock exchange
upon which the Shares  may then be listed,  and shall be further  subject to the

                                      -21-

approval of counsel for the Company with respect to such compliance.

              As a condition to the  exercise of an Option,  the Company may
require the person  exercising  such Option to represent and warrant at the time
of any such exercise that the Shares are being purchased only for investment and
without  any  present  intention  to sell or  distribute  such Shares if, in the
opinion of counsel for the Company,  such a representation is required by any of
the aforementioned relevant provisions of law.

         15.  Reservation of Shares.  The Company, during the term of this  
Plan, will at all times reserve and keep available such number of Shares as
shall be sufficient to satisfy the requirements of the Plan.

              The  inability  of the  Company to obtain  authority  from any
regulatory body having jurisdiction,  which authority is deemed by the Company's
counsel to be necessary to the lawful issuance and sale of any Shares hereunder,
shall relieve the Company of any liability in respect of the failure to issue or
sell  such  Shares  as to which  such  requisite  authority  shall not have been
obtained.

         16.  Option Agreement.  Options shall be evidenced by written option 
agreements in such form as the Board shall approve.