GATEFIELD CORP
S-8, 1997-12-16
ELECTRONIC COMPUTERS
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<PAGE>

      As filed with the Securities and Exchange Commission on December 16, 1997
                                   Registration No. 33-
                              SECURITIES AND EXCHANGE COMMISSION
                                   Washington, D.C. 20549
                                  _____________________

                                        FORM S-8
                                REGISTRATION STATEMENT
                            UNDER THE SECURITIES ACT OF 1933
                                  ______________________

                                  GATEFIELD CORPORATION
                    (Exact name of registrant as specified in its charter)

                  Delaware                                41-1404495 
       (State or other jurisdiction of                   (I.R.S. employer 
       incorporation or organization)                   identification no.)
                                   ______________________

                                     47100 Bayside Parkway
                                   Fremont, California  94538
                (Address of principal executive offices, including zip code)
                                           
                                  1993 Stock Option Plan
                                  1996 Stock Option Plan
                       1995 Non-employee Directors Stock Option Plan
                                Employee Stock Purchase Plan
                                   1984 Stock Option Plan
                                             
                                  (Full titles of the Plans)
                                    ________________________
                                           
                                       James R. Fiebiger 
                                       President and CEO           
                                      Zycad Corporation
                                     47100 Bayside Parkway
                                   Fremont, California 94538
                                        (510) 623 4400
                               (Name, address and telephone number,
                           including area code, of agent for service)
                                           
                                          Copy to:
                                   Douglas E. Klint, Esq.
                        Vice President, Secretary and General Counsel
                                    GateField Corporation
                                   47100 Bayside Parkway
                                 Fremont, California 94538
                                       (510) 623 4400
                                           
                               CALCULATION OF REGISTRATION FEE

<TABLE>
<CAPTION>
                                                 Proposed         Proposed
    Name                  Title of                Amount           Maximum            Maximum           Amount of
     of                   Securities to           to be         Offering Price        Aggregate         Registration
    Plan                  be Registered         Registered        per Share         Offering Price      fee
    -------------         ----------------    --------------    -------------       ----------------    ---------------
    <S>                   <C>                 <C>               <C>                 <C>                 <C>
    1993 Stock            Common Stock     
    Option Plan           $0.01 par value        3,000,000       $1.53(1)           $4,590,000(1)       $1,391.10

</TABLE>

<PAGE>
<TABLE>
    <S>                   <C>                 <C>               <C>                 <C>                 <C>
    1996 Stock            Common Stock
    Option Plan           $0.01 par value          750,000      $1.53(1)            $1,147,500(1)       $  347.77

    1995 Director         Common Stock
    Stock Option          $0.01 par value          200,000      $1.53(1)            $  306,000(1)       $   92.74
    Plan

    Employee              Common Stock             500,000      $1.53(1)            $  765,000(1)       $  231.85
    Stock Purchase        $0.01 par value
    Plan

    1984 Stock            Common Stock             550,000      $1.53               $  841,500          $  255.03
    Option Plan           $0.01 par value
   
</TABLE>

    (1)  Estimated pursuant to Rule 457(c) solely for the purpose of
    calculating the amount of the registration fee based on the average high
    and low prices of the Common Stock as reported on NASDAQ on December 11,
    1997.
<PAGE>
                                GATEFIELD CORPORATION
                          REGISTRATION STATEMENT ON FORM S-8
                                           
                                           
PART II - INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3.   Incorporation of Documents by Reference.

    The following documents filed with the Securities and Exchange Commission 
(the "Commission") are incorporated herein by reference.

(a)  The Registrant's annual report on Form 10-K for the fiscal year ended 
December 31, 1996.
 
(b)  The description of the Registrant's Common Stock contained in the 
Registrant's Registration Statement on Form 8-A filed on April 23, 1984 with 
the Commission under Section 12(b) of the Securities Exchange Act of 1934, as 
amended (the "Exchange Act"), including any amendment or report filed for the 
purpose of updating such description.

(c)  The Registrant's quarterly reports on Form 10-Q for the quarter ended 
September 30, 1997.

(d)  The Registrant's current reports on Form 8-K dated January 15, 1997, 
April 30, 1997, May 15, 1997 and September 5, 1997.

All documents subsequently filed by the Registrant pursuant to Sections 
13(a), 13(c), 14 and 15(d) of the Exchange Act, prior to the filing of a 
post-effective amendment which indicates that all securities registered 
hereby have been sold or which deregisters all securities then remaining 
unsold, shall be deemed incorporated by reference herein and to be a part 
hereof from the date of the filing of such documents.

Item 4.   Description of Securities.

          Not applicable.

Item 5.   Interests of Named Experts and Counsel.
              
    The validity of the issuance of the shares of  the shares of Common Stock 
being registered hereby are being passed upon for the Registrant by Douglas 
E. Klint, Esq., Vice President, Secretary and General Counsel of the 
Registrant. Mr. Klint currently holds options for 110,000 shares of Common 
Stock under the Registrant's 1993 Stock Option Plan which options are not 
vested or exercisable. 

Item 6.   Indemnification of Directors and Officers.

         As permitted by Section 145 of the Delaware General Corporation Law, 
the Registrant's Certificate of Incorporation includes a provision that 
eliminates the personal liability of its directors for monetary damages for 
breach or alleged breach of their duty of care. The Registrant also maintains 
a limited amount of director and officer liability insurance.  In addition, as 
permitted by Section 145 of the Delaware General Corporation Law, the Bylaws 
of the Registrant provide that:  (i) the Registrant is required to indemnify 
its directors, officers and employees, and persons serving in such capacities 
in other business enterprises (including, for example, subsidiaries of the 
Registrant) at the Registrant's request, to the fullest extent permitted by 
Delaware law, including those circumstances in which indemnification would 
otherwise be discretionary; (ii) the Registrant is required to advance 
expenses, as incurred, to such directors, officers and employees in 
connection with defending a proceeding (except that it is not required to 
advance expenses to a person against whom the Registrant brings a claim for 
breach of the duty of loyalty, failure to act in good faith, intentional 
misconduct, knowing violation of law or deriving an improper personal 
benefit); (iii) the rights conferred in the Bylaws are not exclusive and the 
Registrant is authorized to enter into indemnification agreements with such 
directors, officers and employees; (iv) the Registrant is required to 
maintain director and officer liability insurance to the extent reasonably 
available;

<PAGE>

and (v) the Registrant may not retroactively amend the Bylaw provisions in a 
way that is adverse to such directors, officers and employees.

         The Registrant's policy is to enter into indemnity agreements with 
each of its executive officers and directors that provide the maximum 
indemnity allowed to officers and directors by Section 145 of the Delaware 
General Corporation Law, as well as certain additional procedural 
protections.  In addition, the Registrant's Bylaws and  indemnity agreements 
provide that officers and directors will be indemnified to the fullest 
possible extent not prohibited by law against all expenses (including 
attorney's fees) and settlement amounts paid or incurred by them in any 
action or proceeding, including any derivative action by or in the right of 
the Registrant, on account of their services as directors or officers of the 
Registrant or as directors or officers of any other company or enterprise 
when they are serving in such capacities at the request of the Registrant.  
No indemnity will be provided, however, to any director or officer on account 
of conduct that is adjudicated to be knowingly fraudulent, deliberately 
dishonest or willful misconduct.  The indemnity agreements also provide that 
no indemnification will be available if a final court adjudication determines 
that such indemnification is not lawful, or in respect of any accounting of 
profits made from the purchase or sale of securities of the Registrant in 
violation of Section 16(b) of the Exchange Act.

         The indemnity agreements entered into between the Registrant and its 
officers or directors, may be sufficiently broad to permit indemnification of 
the Registrant's officers and directors for liabilities arising under the 
Securities Act of 1933, as amended (the "Securities Act").

Item 7.   Exemption from Registration Claimed.

          Not applicable.

Item 8.   Exhibits.

4.1       The Registrant's 1993 Stock Option Plan.

4.2       The Registrant's 1996 Stock Option Plan.

4.3       The Registrant's 1995 Non-employee Directors Stock Option Plan.

4.4       The Registrant's Employee Stock Purchase Plan

4.5       The Registrant's 1984 Stock Option Plan.

5.1       Opinion of Douglas E. Klint.

23.1      Consent of Douglas E. Klint (included in Exhibit 5.01).

23.2      Consent of Deloitte & Touche LLP.

24.1      Power of Attorney (see pages 5 and 6).

Item 9.   Undertakings.

    The undersigned Registrant hereby undertakes:

(1) To file, during any period in which offers or sales are being made, a 
post-effective amendment to this Registration Statement:

    (i)   To include any prospectus required by Section 10 (a)(3) of the
          Securities Act of 1933;
<PAGE>

    (ii)  To reflect in the prospectus any facts or events arising after the 
    effective date of the Registration Statement (or the most recent 
    post-effective amendment thereof) which, individually or in the 
    aggregate, represent a fundamental change in the information set forth in 
    the Registration Statement;
    
    (iii) To include any material information with respect to the plan of 
    distribution not previously disclosed in the Registration Statement or 
    any material change to such information in the Registration Statement. 
    Provided, however, that paragraphs (1)(i) and (1)(ii) above do not apply 
    if the information required to be included in a post-effective amendment 
    by those paragraphs is contained in periodic reports filed by the 
    Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act 
    that are incorporated by reference in the Registration Statement.

(2)  That, for the purpose of determining any liability under the Securities 
Act, each such post-effective amendment shall be deemed to be a new 
registration statement relating to the securities offered therein, and the 
offering of such securities at that time shall be deemed to be the initial 
bona fide offering thereof.

(3)  To remove from registration by means of a post-effective amendment any 
of the securities being registered which remain unsold at the termination of 
the offering.  The undersigned Registrant hereby undertakes that, for 
purposes of determining any liability under the Securities Act, each filing 
of the Registrant's annual report pursuant to Section 13(a) or Section 15(d) 
of the Exchange Act (and, where applicable, each filing of an employee 
benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) 
that is incorporated by reference in the Registration Statement shall be 
deemed to be a new registration statement relating to the securities offered 
therein, and the offering of such securities at that time shall be deemed to 
be the initial bona fide offering thereof.
    
    The undersigned Registrant hereby undertakes that, for purposes of 
determining any liability under the Securities Act of 1933, each filing of 
the Registrant's annual report pursuant to Section 13(a) or Section 15(d) of 
the Exchange Act of 1934 that is incorporated by reference in the 
registration statement shall be deemed to be a new registration statement 
relating to the securities offered therein, and the offering of such 
securities at that time shall be deemed to be the initial bona fide offering 
thereof.

         Insofar as indemnification for liabilities arising under the 
Securities Act may be permitted to directors, officers and controlling 
persons of the Registrant pursuant to provisions discussed in Item 6 hereof, 
or otherwise, the Registrant has been advised that in the opinion of the 
Commission such indemnification is against public policy as expressed in the 
Securities Act and is, therefore, unenforceable.  In the event that a claim 
for indemnification against such liabilities (other than the payment by the 
Registrant of expenses incurred or paid by a director, officer or controlling 
person of the Registrant in the successful defense of any action, suit or 
proceeding) is asserted by such director, officer or controlling person in 
connection with the securities being registered hereby, the Registrant will, 
unless in the opinion of its counsel the matter has been settled by 
controlling precedent, submit to a court of appropriate jurisdiction the 
question whether such indemnification by it is against public policy as 
expressed in the Securities Act and will be governed by the final 
adjudication of such issue.

<PAGE>

                                    POWER OF ATTORNEY

          KNOW ALL MEN BY THESE PRESENTS that each individual and corporation 
whose signature appears below constitutes and appoints Douglas E. Klint,  his 
true and lawful attorney-in-fact and agent with full power of substitution, 
for him or it and in his or its name, place and stead, in any and all 
capacities, to sign any and all amendments (including post-effective 
amendments) to this Registration Statement on Form S-8, and to file the same 
with all exhibits thereto and all documents in connection therewith, with the 
Securities and Exchange Commission, granting until said attorneys-in-fact and 
agents, and each of them, full power and authority to do and perform each and 
every act and thing requisite and necessary to be done in and about the 
premises, as fully to all intents and purposes as he or it might or could do 
in person, hereby ratifying and confirming all that said attorneys-in-fact 
and agents or any of them, or his or their substitute or substitutes, may 
lawfully do or cause to be done by virtue hereof.

<PAGE>
                                       SIGNATURES
                                           
     Pursuant to the requirements of the Securities Act of 1933, the 
Registrant certifies that it has reasonable grounds to believe that it meets 
all of the requirements for filing on Form S-8 and has duly caused this 
Registration Statement to be signed on its behalf by the undersigned, 
thereunto duly authorized, in the City of Fremont, State of California, on 
this 12th day of December, 1997.

         GATEFIELD CORPORATION


         By:  /s/ James R. Fiebiger
              James R. Fiebiger,
              President and Chief Executive Officer


Pursuant to the requirements of the Securities Act of 1933, this Registration 
Statement has been signed by the following persons in the capacities and on 
the dates indicated.

  Signature                       Title                         Date

Principal Executive
Officer:

/s/ James R. Fiebiger          President, Chief Executive   December 12, 1997
James R. Fiebiger               Officer and Director

Principal Financial
Officer:

/s/Stephen Flory               Chief Financial Officer      December 12, 1997
Stephen Flory                   and Treasurer            
                        
Additional Directors:

/s/ Horst G. Sandfort          Director                     December 12, 1997
Horst G. Sandfort


/s/ Benjamin Huberman          Director                     December 12, 1997
Benjamin Huberman

<PAGE>
                                     Exhibit Index
                                           
Exhibit 
Number                Description
- -------               -----------

4.1           The Registrant's 1993 Stock Option Plan.

4.2           The Registrant's 1996 Stock Option Plan.

4.3           The Registrant's 1995 Non-employee Directors Stock Option Plan

4.4           The Registrant's Employee Stock Purchase Plan

4.5           The Registrant's 1984 Stock Option Plan

5.1           Opinion of Douglas E. Klint.

23.1          Consent of Douglas E. Klint (included in Exhibit 5.01).

23.2          Consent of Deloitte & Touche LLP.

24.1          Power of Attorney (see pages 5 and 6).



<PAGE>

EXHIBIT 4.1
                                           
                                GATEFIELD CORPORATION
                                1993 STOCK OPTION PLAN
                              As Adopted August 16, 1993
                                           
1. PURPOSE OF PLAN

This Plan shall be known as the "GateField Corporation 1993 Stock Option 
Plan" and is hereinafter referred to as the "Plan." The purpose of the Plan 
is to aid in maintaining and developing personnel capable of assuring the 
future success of the Company, to offer such personnel additional incentives 
to put forth maximum efforts for the success of the business, and to afford 
them an opportunity to acquire a proprietary interest in the Company through 
stock options as provided herein.

Options granted under this Plan may be either incentive stock options 
("Incentive Stock Options") within the meaning of Section 422A of the 
Internal Revenue Code of 1986, as amended (the "Code"), or options which do 
not qualify as Incentive Stock Options.

2. STOCK SUBJECT TO PLAN

Subject to the Provisions of Section 13 hereof, the stock to be subject to 
options under the Plan shall be the Company's authorized Common Stock, par 
value $0.10 per share. Such shares may be either authorized by unissued 
shares, or issued shares which have been required by the Company. Subject to 
the adjustment as provided in Section 13 hereof, the maximum number of shares 
on which options may be exercised under this Plan shall be 3,000,000 shares. 
If an option under the Plan expires, or for any reason is terminated or 
unexercised with respect to any shares, such shares shall again be available 
for options thereafter granted during the term of the Plan.

3. ADMINISTRATION OF PLAN

(a)  The Plan shall be administered by a committee (the "Committee") of two or
     more directors of the Company, none of whom shall be officers or employees
     of the Company and all of whom shall be "disinterested persons" with
     respect to the Plan within the meaing of Rule 16b-3(d)(3) under the
     Securities Exchange Act of 1934 as in effect on the date this Plan is
     adopted by the Board of Directors. The members of the Committee shall be
     appointed by and serve at the pleasure of the Board or Directors.

(b)  The Committee shall have plenary authority in its discretion, but subject
     to the express provisions of the Plan, to determine: (i) the purchase price
     of the Common Shares covered by each option, (ii) the employees to whom and
     the time or times at which such options shall be granted and the number of
     shares to be subject to each option, (iii) the form of payment to be made
     upon the exercise of an SAR as provided in Section 9 hereof, either cash,
     common stock of the Company or a combination thereof, (iv) the terms of
     exercise of each option, (v) to accelerate the time at which all or any
     part of an option may be exercised, (vi) to amend or modify the terms of
     any option with the consent of the options (vii) to interpret the Plan,
     (viii) to prescribe, amend and rescind rules and regulations relating to
     the Plan, (ix) to determine the terms and provisions of each option
     agreement under this Plan (which agreements need not be identical),
     including the designation of those options intended to be incentive Stock
     Options, and (x) to make all other determinations necessary

<PAGE>

     or advisable for the administration of the Plan, subject to the 
     exclusive authority of the Board of Directors under Section 14 herein to 
     amend or terminate the Plan. The Committee's determinations on the 
     foregoing matters, unless otherwise disapproved by the Board of 
     Directors of the Company, shall be final and conclusive; provided, 
     however, that the Committee's determinations with respect to the matters 
     set forth in clauses (ii) and (iii) above shall be final and conclusive 
     without any right of disapproval by the Board of Directors of the 
     Company.

(c)  The Committee shall select one of its members as its Chairman and shall
     hold its meetings at such times and places as it may determine. A majority
     of its members shall constitute a quorum. All determinations of the
     Committee shall be made by not less than a majority of its members. Any
     decision or determination reduced to writing and signed by all of the
     members of the Committee shall be fully effective as if it had been made by
     a majority vote at a meeting duly called and held. The granting of an
     option pursuant to the Plan shall be effective only if a written agreement
     shall have been duly executed and delivered by and on behalf of the Company
     and the employee to whom such right is granted. The Committee may appoint a
     Secretary and may make such rules and regulations for the conduct of its
     business as it shall deem advisable.

4. ELIGIBILITY

Options may only be granted under this Plan to any full or part-time employee 
(which term as used herein includes, but is not limited to, officers and 
directors who are also employees) of the Company and of its present and 
future subsidiary corporations (herein called "subsidiaries").  In 
determining the employees to whom options shall be granted and the number of 
shares subject to each option, the Committee may take into account the nature 
of services rendered by the respective employees, their present and potential 
contributions to the success of the Company and such other factors as the 
Committee in its discretion shall deem relevant. A person who has been 
granted an option under this Plan may be granted an additional option or 
options under the Plan if the Committee shall so determine.

5. PRICE

The option price for all incentive Stock Options granted under the Plan shall 
be determined by the Committee but shall not be less than 100% of the fair 
market value of the Common Stock at the date of granting of such option. The 
option price for options granted under the Plan which do not qualify as 
Incentive Stock Options shall also be determined by the Committee but may be 
less than 100% of the fair market value of the Common Stock. For purposes of 
the preceding sentence and for all other valuation purposes under the Plan, 
the fair market value of the Common Stock shall be as reasonably determined 
by the Committee, but shall not be less than the average of the closing 
representative bid and asked prices of the Common Stock as reported on the 
National Association of Securities Dealers Automated Quotation System, if 
applicable, or, if the Common Stock is then traded on a national securities 
exchange, closing price of the stock on such exchange on the date as of which 
fair market value is being determined. If on the date of grant of any option 
granted under the Plan, the Common Stock of the Company is not publicly 
traded, the Committee shall make a good faith attempt to satisfy the option 
price requirement of this Section 5 and in connection therewith shall take 
such action as it deems necessary or advisable.

6. TERM

Each option and all rights and obligations thereunder shall, subject to the 
provisions of Section 10, expire on the date determined by the Committee and 
specified in the option agreement. The Committee shall be under no duty to 
provide terms of like duration for options granted under the Plan, but the 
term of an option may not extend more than ten (10) years from the date of 
granting the option.

<PAGE>

7. EXERCISE OF OPTION

(a)  The Committee shall have full and complete authority to determine,
     subject to Section 10 herein, whether the option will be
     exercisable in full at any time or from time to time during the
     term of the option, or to provide for the exercise thereof in
     such installments, upon the occurrence of such events and at such
     time during the term of the option as the Committee may
     determine.

(b)  The exercise of any option granted hereunder shall only be effective
     at such time as counsel to the Company shall have determined that
     the issuance and delivery of Common Stock pursuant to such
     exercise will not violate any state or federal securities or
     other laws. An optionee desiring to exercise an option may be
     required by the Company, as a condition of the effectiveness of
     any exercise of an option granted hereunder, to agree in writing
     that all Common Stock to be acquired pursuant to such exercise
     shall be held for his or her own account without a view to any
     further distribution thereof, that the certificates for such
     shares shall bear an appropriate legend to that effect and that
     such shares will not be transferred or disposed of except in
     compliance with applicable federal and state securities laws. The
     Company may, in its sole discretion, defer   the effectiveness of
     any exercise of an option granted hereunder in order to allow the
     issuance of Common Stock pursuant thereto to be made pursuant to
     registration or an exemption from registration or other methods
     for compliance available under federal or state securities laws.
     The Company shall be under no obligation to effect the
     registration pursuant to the Securities Act of 1933 of any Common
     Stock to be issued hereunder or to effect similar compliance
     under any state laws. The Company shall inform the optionee in
     writing of its decision to defer the effectiveness of the
     exercise of an option granted hereunder. During the period that
     the effectiveness of the exercise of an option has been deferred,
     the optionee may, by written notice, withdraw such exercise and
     obtain the refund of any amount paid with respect thereto.

(c)  An optionee electing to exercise an option shall give written notice
     to the Company of such election and of the number of shares
     subject to such exercise. The full purchase price of such shares
     shall be tendered with such notice of exercise. Payment shall be
     made to the Company either in cash (including check, bank draft
     or money order), or, at the discretion of the Committee, (i) by
     delivering the Company's Common Stock already owned by the
     Optionee having a fair market value equal to the full purchase
     price of the shares, or (ii) a combination of cash and such
     shares, provided, however, that an optionee shall not be entitled
     to tender shares of the Company's Common Stock pursuant to
     successive, substantially simultaneous exercises of options
     granted under this or any other stock option plan of the Company.
     The fair market value of such shares shall be determined as
     provided in Section 5 herein. Until such person has been issued a
     certificate or certificates for the shares subject to such
     exercise, he shall possess no rights as a stockholder with
     respect to such shares.

8. ADDITIONAL RESTRICTIONS

The Committee shall have full and complete authority to determine whether all 
or any part of the Common Stock of the Company acquired upon exercise of any 
of the options granted under the Plan shall be subject to restrictions on the 
transferability thereof or any other restrictions affecting in any manner the 
Optionee's rights with respect thereto.

9. ALTERNATIVE STOCK APPRECIATION RIGHTS

<PAGE>

(a)  GRANT. At the time of grant of an option under the Plan (or at any 
     time thereafter as to options which are not incentive Stock Options), 
     the Committee, in its discretion, may grant to the holder of such option 
     an alternative Stock Appreciation Right ("SAR") for all or any part of 
     the number of the shares covered by the holder's option. Any such SAR 
     may be exercised as an alternative, but not in addition to, an option 
     granted hereunder, and any exercise of an SAR shall reduce an option by 
     the same number of shares as to which the SAR is exercised. An SAR 
     granted to an option holder shall provide that such SAR, if exercised, 
     must be exercised within the time period specified therein. Such 
     specified time period may be less than (but may not be greater than) the 
     time period during which the corresponding option may be exercised. An 
     SAR may be exercised only when tne corresponding option is eligible to 
     be exercised. The failure of the holder of an SAR to exercise such SAR 
     within the time period specified shall not reduce his option rights. If 
     an SAR is granted for a number of shares less than the total number of 
     shares covered by the corresponding option the Committee may later (as 
     to options which are not Incentive Stock Options) grant to the 
     optionholder an additional SAR covering additional shares, provided, 
     however, that the aggregate amount of all SARs held by any optionholder 
     shall at no time exceed the total number of shares covered by his 
     unexercised options. 

(b)  EXERCISE. The holder of any option which by its terms is exercisable who 
     also holds an SAR may, in lieu of exercising his option, elect to 
     exercise his SAR, subject, however, to the limitation on time of 
     exercise hereinafter set forth. Such SAR shall be exercised by the 
     delivery to the Company of a written notice which shall state that the 
     optionee elects to exercise his SAR as to the number of shares specified 
     in the notice and which shall further state what portion, if any, of the 
     SAR exercise amount (hereinafter defined) the holder thereof requests be 
     paid to him in cash and what portion, if any, he requests be paid to him 
     in Common Stock of the Company. The Committee promptly shall cause to be 
     paid to such holder the SAR exercise amount either in cash. in Common 
     Stock of the Company, or any combination of cash and stock as the 
     Committee may determine. Such determination may be either in accordance 
     with the request made by the holder of the SAR or in the sole and 
     absolute discretion of the Committee. The SAR exercise amount is the 
     excess of the fair market value of one share of the Company's Common 
     Stock on the date of exercise over the per share option price for the 
     option in respect of which the SAR was granted multiplied by the number 
     of shares as to which the SAR is exercised. For the purposes hereof, the 
     fair market value of the Company's shares shall be determined as 
     provided in Section 5 herein. An SAR may be exercised only when the SAR 
     exercise amount is positive.

(c)  LIMITATION ON DATE OF EXERCISE. A SAR may not be exercised for cash 
     during the first six months after the date of grant of the SAR and any 
     related stock option, except that this limitation need not apply if 
     death or disability of the holder occurs prior to the expiration of the 
     six-month period. Any election to receive cash in full or partial 
     settlement of a SAR, and any exercise of a SAR for cash, shall be made 
     only during the third business day through the twelfth business day 
     following the release for publication of the Company's regular quarterly 
     or annual summary statements of sales and earnings; but this restriction 
     shall not apply to any exercise of a SAR for cash where the exercise 
     date meets the following three tests: (i) the date is automatic or fixed 
     in advance under the terms of the Plan, (ii) the date is at least six 
     months after the date of grant of SAR, and (iii) the date is outside the 
     control of the holder.

(d)  OTHER PROVISIONS OF PLAN APPLICABLE. All provisions of this Plan 
     applicable to options granted hereunder shall apply with equal effect to 
     an SAR. No SAR shall be transferable otherwise than by will or the laws 
     of descent and distribution and a SAR may be exercised during the 
     lifetime of the holder thereof, only by such holder.

<PAGE>

10. EFFECT OF TERMINATION OF EMPLOVMENT OR DEATH

(a)  In the event that an optionee shall cease to be employed by the Company 
     or its subsidiaries, if any. for any reason other than his gross and 
     willful misconduct or his death or disability, such optionee shall have 
     the right to exercise the option at any time within three (3) months 
     after such termination of employment to the extent of the full number of 
     shares he was entitled to purchase under the option on the date of 
     termination, subject to the condition that no option shall be 
     exercisable after the expiration of the term of the option.

(b)  In the event that an optionee shall cease to be employed by the Company 
     or its subsidiaries, if any, by reason of his gross and willful 
     misconduct during the course of his employment; including but not 
     limited to wrongful appropriation of funds of his employer or the 
     commission of a gross misdemeanor or felony. the option shall be 
     terminated as of the date of the misconduct.

(c)  If the optionee shall die while in the employ of the Company or a 
     subsidiary, if any, or within three (3) months after termination of 
     employment for any reason other than gross and willful misconduct, or 
     become disabled (within the meaning of Code Section 105(d)(4)) while in 
     the employ of the Company or a subsidiary, if any, and such optionee 
     shall not have fully exercised the option, such option may be exercised 
     at any time within twelve (12) months after his death or such disability 
     by the personal representatives, administrators, or if applicable 
     guardian, of the optionee or by any person or persons to whom the option 
     is transferred by will or the applicable laws of descent and 
     distribution, to the extent of the full number of shares he was entitled 
     to purchase under the option on the date of death, disability or 
     termination of employment, if earlier, and subject to the condition that 
     no option shall be exercisable after the expiration of the term of the 
     option.

(d)  Nothing in the Plan or in any agreement thereunder shall confer on any 
     employee any right to continue in the employ of the Company or any of 
     its subsidiaries or affect, in any way, the right of the Company or any 
     of its subsidiaries to terminate his employment at any time.

11. 10-PERCENT SHAREHOLDER RULE
 
Notwithstanding any other provision in the Plan, if at the time an option is 
otherwise to be granted pursuant to the Plan the optionee owns directly or 
indirectly (within the meaning of Section 425(d) of the Code) Common Stock of 
the Company possessing more than ten percent (10%) of the total combined 
voting power of all classes of stock of the Company or its parent or 
subsidiary corporations, if any, (within the meaning of Section 422A(b)(6) of 
the Code) then any incentive Stock Option to be granted to such optionee 
pursuant to the Plan shall satisfy the requirements of Section 422A(c)(8) of 
the Code, and the option price shall be not less than 110% of the fair market 
value of the Common Stock of the Company determined as described herein. and 
such option by its terms shall not be exercisable after the expiration of 
five (5) years from the date such option is granted.

12. NON-TRANSFERABILITY

 No option granted under the Plan shall be transferable by an optionee, 
otherwise than by will or the laws of descent or distribution as provided in 
Section 10(c) herein. During the lifetime of an optionee the option shall be 
exercisable only by such optionee

<PAGE>

13. DILUTION OR OTHER ADJUSTMENTS

If there shall be any change in the Common Stock through merger, 
consolidation, reorganization, recapitalization. stock dividend (of whatever 
amount), stock split or other change in the corporate structure, appropriate 
adjustments in the Plan and outstanding options and SAR's shall be made by 
the Committee. In the event of any such changes, adjustments shall include, 
where appropriate, changes in the aggregate number of shares subject to the 
Plan, the number of shares and the price per share subject to outstanding 
options and the amount payable upon exercise of outstanding SAR's, in order 
to prevent dilution or enlargement of option or SAR rights.

14. AMENDMENT OR DISCONTINUANCE OF PLAN

The Board of Directors may amend or discontinue the Plan at any time. Subject 
to the provisions of Section 14 no amendment of the Plan, however, shall 
without shareholder approval: (i) decrease the minimum option price provided 
in Section 5 herein, (ii) extend the maximum option term under Section 6, or 
(iii) materially modify the eligibility requirements for participation in the 
Plan. The Board of Directors shall not alter or impair any option theretofore 
granted under the Plan without the consent of the holder of the option.

15. TIME OF GRANTING

Nothing contained in the Plan or in any resolution adopted or to be adopted 
by the Board of Directors or by the Stockholders of the Company, and no 
action taken by the Committee or the Board of Directors (other than the 
execution and delivery of an option), shall constitute the granting of an 
option hereunder.

16. EFFECTIVE DATE AND TERMINATION OF PLAN

(a)  The Plan was approved by the Board of Directors on August 16, 1993.

(b)  Unless the Plan shall have been discontinued as provided in Section 14 
     hereof, the Plan shall terminate August 15, 2003. No option may be 
     granted after such termination, but termination of the Plan shall not, 
     without the consent of the options alter or impair any rights or 
     obligations under any option theretofore granted.


<PAGE>
EXHIBIT 4.2

                                GATEFIELD CORPORATION
                                1996 STOCK OPTION PLAN
                                           
1. PURPOSE OF PLAN

This Plan shall be known as the "GateField Corporation 1996 Stock Option 
Plan" and is hereinafter referred to as the "Plan." The purpose of the Plan 
is to aid in maintaining and developing personnel capable of assuring the 
future success of the Company, to offer such personnel additional incentives 
to put forth maximum efforts for the success of the business, and to afford 
them an opportunity to acquire a proprietary interest in the Company through 
stock options as provided herein.

Options granted under this Plan may be either incentive stock options 
("Incentive Stock Options") within the meaning of Section 422A of the 
Internal Revenue Code of 1986, as amended (the "Code"), or options which do 
not qualify as Incentive Stock Options.

2. STOCK SUBJECT TO PLAN

Subject to the Provisions of Section 13 hereof, the stock to be subject to 
options under the Plan shall be the Company's authorized Common Stock, par 
value $0.10 per share. Such shares may be either authorized by unissued 
shares, or issued shares which have been required by the Company. Subject to 
the adjustment as provided in Section 13 hereof, the maximum number of shares 
on which options may be exercised under this Plan shall be 750,000 shares. If 
an option under the Plan expires, or for any reason is terminated or 
unexercised with respect to any shares, such shares shall again be available 
for options thereafter granted during the term of the Plan.

3. ADMINISTRATION OF PLAN

(a)  The Plan shall be administered by a committee (the "Committee") of two 
     or more directors of the Company, none of whom shall be officers or 
     employees of the Company and all of whom shall be "disinterested 
     persons" with respect to the Plan within the meaing of Rule 16b-3(d)(3) 
     under the Securities Exchange Act of 1934 as in effect on the date this 
     Plan is adopted by the Board of Directors. The members of the Committee 
     shall be appointed by and serve at the pleasure of the Board or 
     Directors.

(b)  The Committee shall have plenary authority in its discretion, but 
     subject to the express provisions of the Plan, to determine: (i) the 
     purchase price of the Common Shares covered by each option, (ii) the 
     employees to whom and the time or times at which such options shall be 
     granted and the number of shares to be subject to each option, (iii) the 
     form of payment to be made upon the exercise of an SAR as provided in 
     Section 9 hereof, either cash, common stock of the Company or a 
     combination thereof, (iv) the terms of exercise of each option, (v) to 
     accelerate the time at which all or any part of an option may be 
     exercised, (vi) to amend or modify the terms of any option with the 
     consent of the options (vii) to interpret the Plan, (viii) to prescribe, 
     amend and rescind rules and regulations relating to the Plan, (ix) to 
     determine the terms and provisions of each option agreement under this 
     Plan (which agreements need not be identical), including the designation 
     of those options intended to be incentive Stock Options, and (x) to make 
     all other determinations necessary or advisable for the administration 
     of the Plan, subject to the exclusive authority of the Board of 
     Directors under Section 14 herein to amend or terminate the Plan. The 

<PAGE>

     Committee's determinations on the foregoing matters, unless otherwise 
     disapproved by the Board of Directors of the Company, shall be final and 
     conclusive; provided, however, that the Committee's determinations with 
     respect to the matters set forth in clauses (ii) and (iii) above shall 
     be final and conclusive without any right of disapproval by the Board of 
     Directors of the Company.

(c)  The Committee shall select one of its members as its Chairman and shall 
     hold its meetings at such times and places as it may determine. A 
     majority of its members shall constitute a quorum. All determinations of 
     the Committee shall be made by not less than a majority of its members. 
     Any decision or determination reduced to writing and signed by all of 
     the members of the Committee shall be fully effective as if it had been 
     made by a majority vote at a meeting duly called and held. The granting 
     of an option pursuant to the Plan shall be effective only if a written 
     agreement shall have been duly executed and delivered by and on behalf 
     of the Company and the employee to whom such right is granted. The 
     Committee may appoint a Secretary and may make such rules and 
     regulations for the conduct of its business as it shall deem advisable.

4. ELIGIBILITY

Options may only be granted under this Plan to any full or part-time employee 
(which term as used herein includes, but is not limited to, officers and 
directors who are also employees) of the Company and of its present and 
future subsidiary corporations (herein called "subsidiaries").  In 
determining the employees to whom options shall be granted and the number of 
shares subject to each option, the Committee may take into account the nature 
of services rendered by the respective employees, their present and potential 
contributions to the success of the Company and such other factors as the 
Committee in its discretion shall deem relevant. A person who has been 
granted an option under this Plan may be granted an additional option or 
options under the Plan if the Committee shall so determine.

5. PRICE

The option price for all incentive Stock Options granted under the Plan shall 
be determined by the Committee but shall not be less than 100% of the fair 
market value of the Common Stock at the date of granting of such option. The 
option price for options granted under the Plan which do not qualify as 
Incentive Stock Options shall also be determined by the Committee but may be 
less than 100% of the fair market value of the Common Stock. For purposes of 
the preceding sentence and for all other valuation purposes under the Plan, 
the fair market value of the Common Stock shall be as reasonably determined 
by the Committee, but shall not be less than the average of the closing 
representative bid and asked prices of the Common Stock as reported on the 
National Association of Securities Dealers Automated Quotation System, if 
applicable, or, if the Common Stock is then traded on a national securities 
exchange, closing price of the stock on such exchange on the date as of which 
fair market value is being determined. If on the date of grant of any option 
granted under the Plan, the Common Stock of the Company is not publicly 
traded, the Committee shall make a good faith attempt to satisfy the option 
price requirement of this Section 5 and in connection therewith shall take 
such action as it deems necessary or advisable.

6. TERM

Each option and all rights and obligations thereunder shall, subject to the
provisions of Section 10, expire on the date determined by the Committee and
specified in the option agreement. The Committee shall be

<PAGE>

under no duty to provide terms of like duration for options granted under the 
Plan, but the term of an option may not extend more than ten (10) years from 
the date of granting the option.

7. EXERCISE OF OPTION

(a)  The Committee shall have full and complete authority to determine, 
     subject to Section 10 herein, whether the option will be exercisable in 
     full at any time or from time to time during the term of the option, or 
     to provide for the exercise thereof in such installments, upon the 
     occurrence of such events and at such time during the term of the option 
     as the Committee may determine.

(b)  The exercise of any option granted hereunder shall only be effective at 
     such time as counsel to the Company shall have determined that the 
     issuance and delivery of Common Stock pursuant to such exercise will not 
     violate any state or federal securities or other laws. An optionee 
     desiring to exercise an option may be required by the Company, as a 
     condition of the effectiveness of any exercise of an option granted 
     hereunder, to agree in writing that all Common Stock to be acquired 
     pursuant to such exercise shall be held for his or her own account 
     without a view to any further distribution thereof, that the 
     certificates for such shares shall bear an appropriate legend to that 
     effect and that such shares will not be transferred or disposed of 
     except in compliance with applicable federal and state securities laws. 
     The Company may, in its sole discretion, defer   the effectiveness of 
     any exercise of an option granted hereunder in order to allow the 
     issuance of Common Stock pursuant thereto to be made pursuant to 
     registration or an exemption from registration or other methods for 
     compliance available under federal or state securities laws. The Company 
     shall be under no obligation to effect the registration pursuant to the 
     Securities Act of 1933 of any Common Stock to be issued hereunder or to 
     effect similar compliance under any state laws. The Company shall inform 
     the optionee in writing of its decision to defer the effectiveness of 
     the exercise of an option granted hereunder. During the period that the 
     effectiveness of the exercise of an option has been deferred, the 
     optionee may, by written notice, withdraw such exercise and obtain the 
     refund of any amount paid with respect thereto.

(c)  An optionee electing to exercise an option shall give written notice to 
     the Company of such election and of the number of shares subject to such 
     exercise. The full purchase price of such shares shall be tendered with 
     such notice of exercise. Payment shall be made to the Company either in 
     cash (including check, bank draft or money order), or, at the discretion 
     of the Committee, (i) by delivering the Company's Common Stock already 
     owned by the Optionee having a fair market value equal to the full 
     purchase price of the shares, or (ii) a combination of cash and such 
     shares, provided, however, that an optionee shall not be entitled to 
     tender shares of the Company's Common Stock pursuant to successive, 
     substantially simultaneous exercises of options granted under this or 
     any other stock option plan of the Company. The fair market value of 
     such shares shall be determined as provided in Section 5 herein. Until 
     such person has been issued a certificate or certificates for the shares 
     subject to such exercise, he shall possess no rights as a stockholder 
     with respect to such shares.

8. ADDITIONAL RESTRICTIONS

The Committee shall have full and complete authority to determine whether all or
any part of the Common Stock of the Company acquired upon exercise of any of the
options granted under the Plan shall be subject

<PAGE>

to restrictions on the transferability thereof or any other restrictions 
affecting in any manner the Optionee's rights with respect thereto.

9. ALTERNATIVE STOCK APPRECIATION RIGHTS
            
(a)  GRANT. At the time of grant of an option under the Plan (or at any time 
     thereafter as to options which are not incentive Stock Options), the 
     Committee, in its discretion, may grant to the holder of such option an 
     alternative Stock Appreciation Right ("SAR") for all or any part of the 
     number of the shares covered by the holder's option. Any such SAR may be 
     exercised as an alternative, but not in addition to, an option granted 
     hereunder, and any exercise of an SAR shall reduce an option by the same 
     number of shares as to which the SAR is exercised. An SAR granted to an 
     option holder shall provide that such SAR, if exercised, must be 
     exercised within the time period specified therein. Such specified time 
     period may be less than (but may not be greater than) the time period 
     during which the corresponding option may be exercised. An SAR may be 
     exercised only when tne corresponding option is eligible to be 
     exercised. The failure of the holder of an SAR to exercise such SAR 
     within the time period specified shall not reduce his option rights. If 
     an SAR is granted for a number of shares less than the total number of 
     shares covered by the corresponding option the Committee may later (as 
     to options which are not Incentive Stock Options) grant to the 
     optionholder an additional SAR covering additional shares, provided, 
     however, that the aggregate amount of all SARs held by any optionholder 
     shall at no time exceed the total number of shares covered by his 
     unexercised options. 

(b)  EXERCISE. The holder of any option which by its terms is exercisable who 
     also holds an SAR may, in lieu of exercising his option, elect to 
     exercise his SAR, subject, however, to the limitation on time of 
     exercise hereinafter set forth. Such SAR shall be exercised by the 
     delivery to the Company of a written notice which shall state that the 
     optionee elects to exercise his SAR as to the number of shares specified 
     in the notice and which shall further state what portion, if any, of the 
     SAR exercise amount (hereinafter defined) the holder thereof requests be 
     paid to him in cash and what portion, if any, he requests be paid to him 
     in Common Stock of the Company. The Committee promptly shall cause to be 
     paid to such holder the SAR exercise amount either in cash. in Common 
     Stock of the Company, or any combination of cash and stock as the 
     Committee may determine. Such determination may be either in accordance 
     with the request made by the holder of the SAR or in the sole and 
     absolute discretion of the Committee. The SAR exercise amount is the 
     excess of the fair market value of one share of the Company's Common 
     Stock on the date of exercise over the per share option price for the 
     option in respect of which the SAR was granted multiplied by the number 
     of shares as to which the SAR is exercised. For the purposes hereof, the 
     fair market value of the Company's shares shall be determined as 
     provided in Section 5 herein. An SAR may be exercised only when the SAR 
     exercise amount is positive.

(c)  LIMITATION ON DATE OF EXERCISE. A SAR may not be exercised for cash 
     during the first six months after the date of grant of the SAR and any 
     related stock option, except that this limitation need not apply if 
     death or disability of the holder occurs prior to the expiration of the 
     six-month period. Any election to receive cash in full or partial 
     settlement of a SAR, and any exercise of a SAR for cash, shall be made 
     only during the third business day through the twelfth business day 
     following the release for publication of the Company's regular quarterly 
     or annual summary statements of sales and earnings; but this restriction 
     shall not apply to any exercise of a SAR for cash where the

<PAGE>

     exercise date meets the following three tests: (i) the date is automatic 
     or fixed in advance under the terms of the Plan, (ii) the date is at 
     least six months after the date of grant of SAR, and (iii) the date is 
     outside the control of the holder.

(d)  OTHER PROVISIONS OF PLAN APPLICABLE. All provisions of this Plan 
     applicable to options granted hereunder shall apply with equal effect to 
     an SAR. No SAR shall be transferable otherwise than by will or the laws 
     of descent and distribution and a SAR may be exercised during the 
     lifetime of the holder thereof, only by such holder.

10. EFFECT OF TERMINATION OF EMPLOVMENT OR DEATH

(a)  In the event that an optionee shall cease to be employed by the Company 
     or its subsidiaries, if any. for any reason other than his gross and 
     willful misconduct or his death or disability, such optionee shall have 
     the right to exercise the option at any time within three (3) months 
     after such termination of employment to the extent of the full number of 
     shares he was entitled to purchase under the option on the date of 
     termination, subject to the condition that no option shall be 
     exercisable after the expiration of the term of the option.

(b)  In the event that an optionee shall cease to be employed by the Company 
     or its subsidiaries, if any, by reason of his gross and willful 
     misconduct during the course of his employment; including but not 
     limited to wrongful appropriation of funds of his employer or the 
     commission of a gross misdemeanor or felony. the option shall be 
     terminated as of the date of the misconduct.

(c)  If the optionee shall die while in the employ of the Company or a 
     subsidiary, if any, or within three (3) months after termination of 
     employment for any reason other than gross and willful misconduct, or 
     become disabled (within the meaning of Code Section 105(d)(4)) while in 
     the employ of the Company or a subsidiary, if any, and such optionee 
     shall not have fully exercised the option, such option may be exercised 
     at any time within twelve (12) months after his death or such disability 
     by the personal representatives, administrators, or if applicable 
     guardian, of the optionee or by any person or persons to whom the option 
     is transferred by will or the applicable laws of descent and 
     distribution, to the extent of the full number of shares he was entitled 
     to purchase under the option on the date of death, disability or 
     termination of employment, if earlier, and subject to the condition that 
     no option shall be exercisable after the expiration of the term of the 
     option.

(d)  Nothing in the Plan or in any agreement thereunder shall confer on any 
     employee any right to continue in the employ of the Company or any of 
     its subsidiaries or affect, in any way, the right of the Company or any 
     of its subsidiaries to terminate his employment at any time.

11. 10-PERCENT SHAREHOLDER RULE
 
Notwithstanding any other provision in the Plan, if at the time an option is
otherwise to be granted pursuant to the Plan the optionee owns directly or
indirectly (within the meaning of Section 425(d) of the Code) Common Stock of
the Company possessing more than ten percent (10%) of the total combined voting
power of all classes of stock of the Company or its parent or subsidiary
corporations, if any, (within the meaning of Section 422A(b)(6) of the Code)
then any incentive Stock Option to be granted to such

<PAGE>

optionee pursuant to the Plan shall satisfy the requirements of Section 
422A(c)(8) of the Code, and the option price shall be not less than 110% of 
the fair market value of the Common Stock of the Company determined as 
described herein. and such option by its terms shall not be exercisable after 
the expiration of five (5) years from the date such option is granted.

12. NON-TRANSFERABILITY

No option granted under the Plan shall be transferable by an optionee, 
otherwise than by will or the laws of descent or distribution as provided in 
Section 10(c) herein. During the lifetime of an optionee the option shall be 
exercisable only by such optionee.

13. DILUTION OR OTHER ADJUSTMENTS

If there shall be any change in the Common Stock through merger, 
consolidation, reorganization, recapitalization. stock dividend (of whatever 
amount), stock split or other change in the corporate structure, appropriate 
adjustments in the Plan and outstanding options and SAR's shall be made by 
the Committee. In the event of any such changes, adjustments shall include, 
where appropriate, changes in the aggregate number of shares subject to the 
Plan, the number of shares and the price per share subject to outstanding 
options and the amount payable upon exercise of outstanding SAR's, in order 
to prevent dilution or enlargement of option or SAR rights.

14. AMENDMENT OR DISCONTINUANCE OF PLAN

The Board of Directors may amend or discontinue the Plan at any time. Subject to
the provisions of Section 14 no amendment of the Plan, however, shall without
shareholder approval: (i) decrease the minimum option price provided in Section
5 herein, (ii) extend the maximum option term under Section 6, or (iii)
materially modify the eligibility requirements for participation in the Plan.
The Board of Directors shall not alter or impair any option theretofore granted
under the Plan without the consent of the holder of the option.

15. TIME OF GRANTING

Nothing contained in the Plan or in any resolution adopted or to be adopted by
the Board of Directors or by the Stockholders of the Company, and no action
taken by the Committee or the Board of Directors (other than the execution and
delivery of an option), shall constitute the granting of an option hereunder.

16. EFFECTIVE DATE AND TERMINATION OF PLAN

(a)  The Plan was approved by the Board of Directors on October 29, 1996.

(b)  Unless the Plan shall have been discontinued as provided in Section 14 
     hereof, the Plan shall terminate October 29, 2006. No option may be 
     granted after such termination, but termination of the Plan shall not, 
     without the consent of the options alter or impair any rights or 
     obligations under any option theretofore granted.


<PAGE>
EXHIBIT 4.3
                                           
                                GATEFIELD CORPORATION
                                           
             1995 STOCK OPTLON DIRECTORS PLAN FOR NON-EMPLOYEE DIRECTORS
                                           
                                      ARTICLE I

                                 PURPOSES OF THE PLAN
                                           
     The purposes of the GateField Corporation 1995 Stock Option Directors 
Plan for Non-Employee Directors (the "1995 Directors Plan") are to attract 
and retain the services of experienced and knowledgeable non-employee 
directors of GateField Corporation (the "Corporation"), and to provide an 
incentive for such directors to increase their proprietary interest in the 
Corporation's long-term success and progress.

                                      ARTICLE II
                                           
                             SHARES SUBJECT TO THE  PLAN
                                           
     The total number of shares of common stock, par value $.10 per share of 
the Corporation (the "Shares"), for which options may be granted under the 
1995 Directors Plan is 200,000 shares, subject to adjustment in accordance 
with Article VI hereof. The Shares shall be authorized and unissued shares 
and shall include shares representing the unexercised portion of any option 
granted under the 1995 Directors Plan which expires or terminates without 
being exercised in full.

                                     ARTICLE III
                                           
                              ADMINISTRATION OF THE PLAN
                                           
     The 1995 Directors Plan shall be administered by the Board of Directors 
of the Corporation (the "Board") or, in the event the Board shall appoint 
and/or authorize a Compensation Committee to administer the 1995 Directors 
Plan, by such committee. The administrator of the 1995 Directors Plan shall 
hereinafter be referred to as the "Plan Administrator". Subject to the terms 
of the 1995 Directors Plan, the Plan Administrator shall have the power to 
construe the provisions of the 1995 Directors Plan, to determine all 
questions arising thereunder and to adopt and amend such rules and 
regulations for the administration of the 1995 Directors Plan as it may deem 
desirable.

                                      ARTICLE IV

                              PARTICIPATION IN THE PLAN
                                           
     Each person who is serving as a director of the Corporation who is not 
an employee of the Corporation or any subsidiary ("Director") shall receive 
options to acquire such number of shares under the 1995 Directors Plan as set 
forth immediately below.

                 (i) 15,000 shares to any person who is newly elected as a 
Director after the date of approval of the 1995 Directors Plan by the 
stockholders of the Corporation upon such subsequent date that such Director 
is elected to such position by the stockholders of the Corporation (the 
"Initial Grant"); and
                 
                 (ii)   7,50O shares annually subsequent to the year in which 
the 1995 Directors Plan is approved by the stockholders of the Corporation, 
such option to be granted as of the date of the Corporation's annual meeting 
of stockholders held in such year, whether or not such Director is a nominee 
for Director at such meeting (the "Annual Grant").

<PAGE>

Notwithstanding the foregoing, in no event shall any Director receive options 
to purchase in the aggregate more than 100,000 Shares pursuant to this 1995 
Directors Plan. Grants under the 1995 Directors Plan shall commence upon the 
approval of the 1995 Directors Plan by the stockholders of the Corporation.

                                      ARTICLE VI
                                     OPTION TERMS
                                           
Each option granted to a Director under the 1995 Directors Plan and the 
issuance of Shares thereunder shall be subject to the following terms.

A. OPTION AGREEMENT.  Each option granted under the 1995 Directors Plan shall 
be evidenced by an option agreement (an "Agreement") duly executed on behalf 
of the Corporation and by the Director to whom such option is granted. Each 
Agreement shall comply with and be subject to the terms and conditions of the 
1995 Directors Plan. Any Agreement may contain such other terms, provisions 
and conditions not inconsistent with the 1995 Directors Plan as may be 
determined by the Plan Administrator. No option shall be granted within the 
meaning of the 1995 Directors Plan and no purported grant of any option shall 
be effective until an Agreement shall have been duly executed on behalf of 
the Corporation and the Director to whom the option is to be granted.

B. OPTION EXERCISE PRICE.  The option exercise price for an option granted 
under the 1995 Directors Plan shall be the fair market value of the Shares 
covered by the option at the time the Plan Administrator acts to grant the 
option. For purposes of the 1995 Directors Plan, "fair market value" is 
defined as the mean between the bid and ask prices quoted on the close of the 
day of grant on the National Association of Securities Dealers Automatic 
Quotation System.

C. TIME AND  MANNER OF EXERCISE OF OPTION.  Options from the Initial 
Grant shall vest and are exercisable two (2) years after their grant and may 
be exercised in full at one time or in part from time to time.  Options from 
the Annual Grant shall vest and are exercisable one (1) year after their 
grant and may be exercisable in full at one point or in part from time to 
time.  Any option may be exercised by giving written notice, signed by the 
person exercising the option, to the Corporation stating the number of Shares 
with respect to which the option is being exercised, accompanied by payment 
in full for such Shares, which payment may be in whole or in part in shares 
already owned by the person or persons exercising the option, valued at fair 
market value at the time of such exercise.

D. TERM OF OPTIONS. Each option shall expire not more than ten (10) 
years from the date of the granting thereof, but shall be subject to earlier 
termination as follows:

                 (i) in the event of the death of an optionee, the vested 
portion of the option granted to such optionee may be exercised within one 
(I) year after the date of death of such optionee or prior to the date on 
which the option expires by its terms, whichever is earlier, by the estate of 
such optionee, or by any person or persons whom the optionee shall have 
designated in writing on forms prescribed by and filed with the Corporation 
or, if no such designation has been made by the person or persons to whom the 
optionee's rights have passed, by will or the laws of descent and 
distribution.

                 (ii) in the event that an optionee ceases to be a Director, 
the options granted to such optionee may be exercised by him or her within 
one (1) year after the date such optionee ceases to be a Director or prior to 
the date on which the option expires by its terms, whichever is earlier.

E. TRANSFERABILITY.  The right of any optionee to exercise an option granted 
to him or her under the 1995 Directors Plan shall not be assignable or 
transferable by such optionee otherwise than by  will or the laws of descent 
and distribution, and any such option shall be exercisable during the 
lifetime of such optionee only by optionee.

<PAGE>

F. PARTICIPANTS OR SUCCESSOR'S RIGHTS AS SHAREHOLDER.  Neither the recipient 
of an option under the 1995 Directors Plan nor his or her successor(s) in 
interest shall have any rights as a stockholder of the Corporation with 
respect to any Shares subject to an option granted to such person until such 
person becomes a holder of record of such Shares.

G. REGULATORY APPROVAL AND COMPLIANCE. The Corporation shall not be required 
to issue any certificate or certificates for shares of its stock upon the 
exercise of an option granted under the Plan, or record as a holder of record 
of such Shares the name of the individual exercising an option under the 
Plan, without obtaining to the Plan Administrator's complete satisfaction, 
the approval of all regulatory bodies deemed necessary by the Plan 
Administrator and without complying to the Plan Administrator's complete 
satisfaction, with all rules and regulations under federal, state or local 
law deemed applicable by the Plan Administrator.

                                      ARTICLE VI
                                           
                                 CAPITAL ADJUSTMENTS
                                           
The aggregate number of Shares with respect to which options may be granted 
under the Plan as provided in Article II, the number of Shares subject to 
each outstanding option, and the price per share specified in each such 
option, may all be adjusted, as the Plan Administrator shall determine at its 
sole discretion or as may be required, for any increase or decrease in the 
number of issued shares of common stock of the Corporation resulting from a 
subdivision or consolidation of shares or any other similar capital 
adjustment, the payment of a stock dividend, or other increase or decrease in 
such shares effected without receipt of consideration by, or a merger or 
consolidation of, the Corporation, or the sale of all or substantially all of 
the assets of, or the liquidation of, the Corporation.

                                     ARTICLE VII
                                           
                                EXPENSES OF  THE PLAN
                                           
     All costs and expenses of the adoption and administration of the Plan 
shall be borne by the Corporation, and none of such expenses shall be charged 
to any optionee.

                                     ARTICLE VIII
                                           
                               APPROVAL OF STOCKHOLDERS
                                           
     The  Plan shall be subject to approval by the vote of stockholders 
holding at least a majority of the voting stock of the Corporation, voting in 
person or by proxy  a duly held stockholders' meeting.

                                      ARTICLE IX
                                           
                        TERMINATION AND AMENDMENT OF THE PLAN
                                           
The Board may amend, terminate or suspend the Plan at any time, in its sole 
and absolute discretion; provided, however, that if required by Section 16(b) 
of the Securities Exchange Act of 1934, as amended, the approval of 
stockholders will be required for any amendment which shall (a} increase the 
number of Shares subject to the Plan; (b) reduce the option price below 100% 
of the market value of the Shares subject to the option at the time the 
option was granted; (c) increase beyond 100,000 the number of Shares for 
which options may be granted to each Director; (d) change the timing with 
respect to which such options are granted or exercisable; or (c) otherwise 
require stockholder approval under applicable law, including Section 16(b).

                                      ARTICLE X
                                           
                                    EFFECTIVE DATE
                                           
The effective date of the Plan shall be the date on which the Plan is approved
by the stockholders of the Corporation.

<PAGE>
EXHIBIT 4.4
                                           
                            EMPLOYEES' STOCK PURCHASE PLAN
                                           
                                ARTICLE 1. DEFINITIONS
                                           
     To provide the employees of Zycad Corporation (the "Company") and its 
wholly-owned subsidiaries an opportunity to acquire a proprietary interest in 
the Company through the purchase of its Common Stock and thus develop a 
stronger incentive to work for the continued success of the Company, the 
Company adopts the Employees' Stock Purchase Plan.

     Section 1.01. "PLAN" means the Employees' Stock Purchase Plan, the terms 
and provisions of which are set forth herein.

     Section 1.02. "COMPANY" means Zycad Corporation and its wholly-owned 
subsidiaries.

     Section 1.03. "SHARES" means the shares of Common Stock of Zycad 
Corporation.

     Section 1.04. "PARTICIPANT" means a Regular Permanent Employee of the 
Company who is eligible to participate in the Plan and who has elected to 
participate in the Plan in the manner set forth in the Plan.

     Section 1.05. "CURRENT COMPENSATION" means all regular wage, salary and 
commission payments paid by the Company to a Participant in accordance with 
the terms of his employment, but excluding annual bonus payments and all 
other forms of special compensation.

     Section 1.06. "FISCAL YEAR" means the period from January 1 to the 
succeeding December 31.

     Section 1.07. "PERMANENT FULL-TIME EMPLOYEE" of the Company means all 
employees of the Company (including officers or employees of the Company) 
except (i) employees customarily employed less than 20 hours weekly, (ii) any 
employee who has not been an employee of the Company for at least 30 days 
immediately prior thereto, provided that an approved leave of absence or 
lay-off shall not be deemed to terminate the employee's continuous employment 
with the Company and (iii) employees who, immediately after an option is 
granted, own directly or indirectly within the meaning of Section 423(b)(3) 
and Section 425(d) of the Internal Revenue Code of 1954, as amended, stock 
possessing five percent (5%) or more of the total combined voting power or 
value of all the classes of the shares of the Company or its parent or 
subsidiary corporations, if any.

     Section 1.08. "STOCK OPTION ACCOUNT" means the individual account 
established by the Company to which payroll deductions are credited.

     Section 1.09. "COMMITTEE" means the Stock Plan Committee described in 
Section 10.01.

     Section 1.10. "PURCHASE PERIOD" means the three-month periods beginning 
on January 1, April 1, July 1 and October 1 of each year and which coincide 
with the Company's quarterly Fiscal Year periods.

     ARTICLE 2. ELIGIBLE EMPLOYEES AND ELECTION TO PARTICIPATE

     Section 2.01. Each Permanent Full-time Employee of the Company shall be 
eligible to participate in the Plan commencing with the January 1, April 1, 
July 1 or October 1 on which, or next following the date on which, he becomes 
a Permanent Full-time Employee.  Subject to the provisions of ARTICLE 6, a 
Permanent Full-time Employee is defined IN SECTION 1.07.

<PAGE>

     Section 2.02. An eligible employee may elect to participate in the Plan 
by completing an "Election to Participate and Payroll Deduction 
Authorization" form (which authorizes regular payroll deductions from the 
employee's Current Compensation beginning with the first payroll period 
ending on or after the eligibility date determined in accordance with Section 
2.01 and continuing until the employee withdraws from the Plan or ceases to 
be eligible to participate in the Plan).

       ARTICLE 3. PAYROLL DEDUCTIONS AND STOCK OPTION ACCOUNT

     Section 3.01. A Participant may elect payroll deductions of any multiple 
of one percent but not less than three percent or more than ten percent of 
his Current Compensation.  A Participant's election hereunder is irrevocable 
when made; provided, however, that a Participant may at any time increase or 
decrease the percentage of his payroll deduction within the foregoing 
limitations by filing a "Notice of Change" form, such change to become 
effective only upon receipt thereof by the Company and with respect to the 
first payroll period commencing after the beginning of the next Purchase 
Period.

     Section 3.02. Payroll deductions shall be credited currently to the 
Participant's Stock Option Account.  A Participant may not make any separate 
cash payment into his Stock Option Account.

     Section 3.03. No interest will be paid upon payroll deductions or on any 
amount credited to, or on deposit in, a Participant's Stock Option Account.

                          ARTICLE 4. GRANTING OF OPTIONS
                                           
            Section 4.01. On the first business day of each Purchase Period 
each Participant shall automatically receive an option to purchase on the 
last business day of that Purchase Period, that number of whole Shares, not 
less than ten (10), as could be purchased at a price equal to the price 
specified in Section 4.02 with the entire credit balance in the Participant's 
Stock Option Account on the last business day of that Purchase Period (but 
not to exceed 800 Shares); provided, however, that no option shall be deemed 
to be granted or received hereunder which would permit a Participant to 
purchase Shares under this Plan and under all other employee stock purchase 
plans, if any, of the Company at a rate which exceeds $25,000 in fair market 
value of shares (determined at the time the option is granted) for each 
calendar year, as provided in Section 423(b)(8) of the Internal Revenue Code 
of 1954, as amended.

            Section 4.02. In the event of the exercise of an option under 
termination of employment of a Participant other than by reason of death, the 
option price shall be the fair market value of the Shares on the date on 
which the option is granted.  In all other circumstances, the option price 
shall be the lesser of (i) the fair market value of the Shares on the date on 
which the option is granted on the first day of the Purchase Period or (ii) 
the fair market value of the Shares on the last day of the Purchase Period on 
which the option is exercised by purchase of Shares, in each case rounded up 
to the next higher full cent.  The fair market value on any day shall be the 
mean between the closing bid and the asked prices, as determined by the 
Committee after such consultation with such dealers or quotation service as 
the Committee may determine.

            ARTICLE 5. EXERCISE OF OPTIONS; TERMINATION OF EMPLOYMENT

            Section 5.01. On the last day of the Purchase Period for which an 
option is granted pursuant to the Plan or, if sooner, upon termination of 
employment of the Participant other than by reason of death, such option 
shall automatically be exercised for the full number of full Shares (not in 
excess of the number of Shares covered by the option granted to him pursuant 
to Section 4.01) purchasable from moneys in the Participant's Stock Option 
Account unless the Participant withdraws from the Plan prior to such date or 
such termination of employment, as the case may be.  To the extent not 
exercisable on such date, the option shall terminate.  Approved leave of 
absence or lay-off shall not be deemed a termination of employment for the 
purposes of the Plan.

<PAGE>

      Section 5.02. Any funds remaining in a Participant's Stock Option 
Account after the exercise or termination of an option shall be refunded 
promptly to the Participant.

                      ARTICLE 6. WITHDRAWAL FROM THE PLAN; DEATH
                                           
     Section 6.01. A Participant may, at any time, by written notice to the 
Company, withdraw from the Plan and cease making any further payroll 
deductions.  In such event, the Company shall refund, within 30 days, the 
entire balance, if any, in the Participant's Stock Option Account.  Once an 
employee withdraws from the Plan, he shall not be eligible to re-enter the 
Plan until the next Fiscal Year.

     Section 6.02. Participation in the Plan shall cease upon the date of 
death of a Participant.  In the event of the death of a Participant, the 
amount credited to the Participant's Stock Option Account shall be refunded 
within 30 days to his estate; provided that if during his lifetime a 
Participant has delivered to the Company a notice in writing, upon a form 
furnished by the Company, to pay such amount in event of his death to a 
specified person or persons such amount, in event of the Participant's death, 
shall be refunded to such person or persons whose designation as aforesaid 
has not been revoked by the Participant during his lifetime.

                          ARTICLE 7. TRANSFERABILITY
                                           
     Section 7.01. Options granted hereunder may not be assigned, 
transferred, pledged or hypothecated (whether by operation of law or 
otherwise) and shall not be subject to execution, attachment or similar 
process.  Any attempted assignment, transfer, pledge, hypothecation or other 
disposition or levy of attachment or similar process upon the option shall be 
null and void and without effect.  The option may be exercised only by the 
Participant.

     Section 7.02. The funds accumulated in the Stock Option Account may not 
be assigned, transferred, pledged or hypothecated in any way, and any 
attempted assignment, transfer, pledge, hypothecation or other disposition of 
the funds accumulated in the Stock Option Account shall be null and void and 
without effect.

                       ARTICLE 8. SHARE CERTIFICATES

     Section 8.01. As soon as practicable after the exercise of an option, 
the Company will cause to be delivered to the Participant a certificate 
representing the Shares purchased upon such exercise.

     Section 8.02. The Company shall not be required to issue or deliver any 
certificate representing Shares purchased upon the exercise of options prior 
to registration under the Securities Act of 1933, as amended, or registration 
or qualification under any state law if such registration is required.  The 
Company will use its best efforts to accomplish such registration, if and to 
the extent required, not later than a reasonable time following the exercise 
of the option, and delivery of share certificates may be deferred until such 
registration is accomplished.

     Section 8.03. An employee shall have no interest in the Shares covered 
by his option until a share certificate representing the same is issued.

     Section 8.04. The share certificates representing Shares issued under 
the Plan shall be registered in the name of the Participant or jointly with a 
right of survivorship in the name of the Participant and another person, as 
the Participant may direct.

                   ARTICLE 9. EFFECTIVE DATE AND AMENDMENT 
                                OR TERMINATION OF PLAN
                                           
     Section 9.01. The Plan shall become effective on May 1, 1987.

<PAGE>

     Section 9.02. The Board of Directors of the Company may at any time 
terminate or amend the Plan except that no amendment shall be made without 
prior approval of the shareholders which would (i) authorize an increase in 
the number of shares which may be purchased under the Plan, except as 
provided in Section 11.01, (ii)  permit the issuance of Shares before payment 
therefore in full, (iii)  increase the rate of payroll deductions above 10% 
of Current Compensation or (iv) reduce the price per share at which the 
Shares may be purchased.

     Section 9.03. The Plan shall automatically terminate on December 31, 
1998.

                    ARTICLE 10. STOCK PLAN COMMITTEE
                                           
     Section 10.01. The Plan shall be administered by a Stock Plan Committee 
consisting of three employees of the Company, appointed by the Board of 
Directors of the Company.  In administering the Plan, it will be necessary to 
follow various laws and regulations.  It may be necessary from time to time 
to change or waive requirements of the Plan to conform with the law, to meet 
special circumstances not anticipated or covered in the Plan, or to carry on 
successful operations of the Plan.  Therefore, the Company reserves the 
right, exercisable by the Committee or by its Board of Directors, to make 
variations in the provisions of the Plan for such purposes and to determine 
any questions which may arise regarding interpretation and application of the 
provisions of the Plan.  The determination of the Committee or of the Board 
of Directors as to the interpretation and operation of the Plan shall be 
final and conclusive, provided that any such determination by the Committee 
shall be subject to review by the Board of Directors.

               ARTICLE 11. STOCK DIVIDEND OR RECLASSIFICATION
                            MERGER OR CONSOLIDATION
                                           
     Section 11.01. 'If a record date for a stock dividend or for a 
reclassification by way of split-up or reduction in the number of Shares 
shall occur during an option period, appropriate adjustments in the number of 
shares and option prices shall be made to give effect thereto on an equitable 
basis. Similarly, on the payment of any stock dividend or reclassification by 
way of split-up or reduction in the number of shares, the total number of 
shares authorized by SECTION 12.01 to be sold under the Plan shall be 
adjusted accordingly.

     Section 11.02. If the Company is merged into or consolidated with one or 
more corporations during an option period, appropriate adjustments shall be 
made to give effect thereto on an equitable basis in terms of issuance of 
shares consolidated corporation, as the case may be.

            ARTICLE 12. SHARES TO BE SOLD

     Section 12.01. The Shares to be issued and sold under the Plan may be 
treasury shares or unissued shares, or the Company may purchase shares for 
sale under the Plan.  Except as provided in SECTION 11.01, the aggregate 
number of Shares to be sold under the Plan shall not exceed 100,000 Shares.

             ARTICLE 13. NOTICES; CONSTRUCTION
                                           
     Section 13.01. Notices to the Stock Plan Committee shall be addressed as 
follows:
            
     Section 13.02. The Company intends that the Plan qualify as an "employee 
stock purchase plan" under Section 423 of the Internal Revenue Code of 1986, 
as amended, and, therefore, the Plan shall be construed in a manner 
consistent therewith if so approved.  All employees granted options under the 
Plan shall have the same rights and privileges consistent with the terms of 
the Plan.

<PAGE>

EXHIBIT 4.5

                                  ZYCAD CORPORATION
                                1984 STOCK OPTION PLAN


     1.  PURPOSE OF PLAN.

     This Plan shall be known as the "Zycad Corporation 1984 Stock Option 
Plan" and is hereinafter referred to as the "Plan".  The purpose of the Plan 
is to aid in maintaining and developing personnel capable of assuring the 
future success of the Company, to offer such personnel additional incentives 
to put forth maximum efforts for the success of the business, and to afford 
them an opportunity to acquire a proprietary interest in the Company through 
stock options as provided herein.  Options granted under this Plan may be 
either incentive stock options ("Incentive Stock Options") within the meaning 
of Section 422A of the Internal Revenue Code of 1986, as amended (the 
"Code"), or options which do not qualify as Incentive Stock Options.

     2.  STOCK SUBJECT TO PLAN

     Subject to the provisions of Section 13 hereof, the stock to be subject 
to options under the Plan shall be the Company's authorized Common Stock, par 
value $0.10 per share.  Such shares may be either authorized but unissued 
shares, or issued shares which have been reacquired by the Company.  Subject 
to the adjustment as provided in Section 13 hereof, the maximum number of 
shares on which options may be exercised under this Plan shall be 3,000,000 
shares.  If an option under the Plan expires, or for any reason is terminated 
or unexercised with respect to any shares, such shares shall again be 
available for options thereafter granted during the term of the Plan.

     3.  ADMINISTRATION OF PLAN.

           (a)  The Plan shall be administered by a committee (the 
"Committee") of three or more directors of the Company, none of whom shall be 
officers or employees of the Company and all of whom shall be "disinterested 
persons" with respect to the Plan within the meaning of Rule 16b-3(d)(3) 
under the Securities Exchange Act of 1934 as in effect on the date this Plan 
is adopted by the Board of Directors.  The members of the Committee shall be 
appointed by and serve at the pleasure of the Board of Directors.

           (b)  The Committee shall have plenary authority in its discretion, 
but subject to the express provisions of this Plan, to determine: (i) the 
purchase price of the Common Shares covered by each option, (ii) the 
employees to whom and the time or times at which such options shall be 
granted and the number of shares to be subject to each option, (iii) the form 
of payment to be made upon the exercise of an SAR as provided in Section 9 
hereof, either cash, common stock of the Company or a combination thereof, 
(iv) the terms of exercise of each option, (v) to accelerate the time at 
which all or any part of an option may be exercised, (vi) to amend or modify 
the terms of any option with the consent of the optionee, (vii) to interpret 
the Plan, (viii) to prescribe, amend and rescind rules and regulations 
relating to the Plan, (ix) to determine the terms and provisions of each 
option agreement under this Plan (which agreements need not be identical), 
including the designation of those options intended to be Incentive Stock 
options, and (x) to make all other determinations necessary or advisable for 
the administration of the Plan, subject to the exclusive authority of the 
Board of Directors under Section 14 herein to amend or terminate the Plan.  
The Committee's determinations on the foregoing matters, unless otherwise 
disapproved by the Board of Directors of the Company, shall be final and 
conclusive; provided, however, that the Committee's determinations with 
respect to the matters set forth in clauses (ii) and (iii) above shall be 
final and conclusive without any right of disapproval by the Board of 
Directors of the Company.

           (c)  The Committee shall select one of its members as its Chairman 
and shall hold its meetings at such times and places as it may determine.  A 
majority of its members shall constitute a quorum.  All determinations of the 
Committee shall be made by not less than a majority of its members.  Any 
decision or determination reduced to writing and signed by all of the members 
of the Committee shall be fully effective as if it had been made by a 
majority vote at a meeting duly called and held.  The granting of an option 
pursuant to the Plan 

<PAGE>

shall be effective only if A written agreement shall 
have been duly executed and delivered by and on behalf of the Company and the 
employee to whom such right is granted.  The Committee may appoint a 
Secretary and may make such rules and regulations for the conduct of its 
business as it shall deem advisable.

     4.  ELIGIBILITY.

     Options may only be granted under this Plan to any full or part-time 
employee (which term as used herein includes, but is not limited to, officers 
and directors who are also employees) of the Company and of its present and 
future subsidiary corporations (herein called "subsidiaries").  In 
determining the employees to whom options shall be granted and the number of 
shares subject to each option, the Committee may take into account the nature 
of services rendered by the respective employees, their present and potential 
contributions to the success of the Company and such other factors as the 
Committee in its discretion shall deem relevant.  A person who has been 
granted an option under this Plan may be granted an additional option or 
options under the Plan if the Committee shall so determine; provided, 
however, that (a) for Incentive Stock Options granted before January 1, 1987, 
the aggregate fair market value (determined as of the time the option is 
granted) of the Common Stock for which any employee may be granted such 
Incentive Stock Options in any calendar year (under all Plans described in 
subsection (b)(8) of Section 422A of the Code of his employer corporation and 
its parent and subsidiary corporations) shall not exceed $100,000 plus any 
unused limit carryover to such year, determined in the manner set forth in 
Section 422A(c)(4) of the Code, and (b) for Incentive Stock Options granted 
after December 31, 1986, the aggregate fair market value (determined at the 
time the Incentive Stock Option is granted) of the stock with respect to 
which all Incentive Stock Options are exercisable for the first time by an 
employee during any calendar year (under all Plans described in Section 
422A(b)(7) of the Code of his employer corporation and its parent and 
subsidiary corporations) shall not exceed $100,000.

     5. PRICE.  The option price for all Incentive Stock Options granted 
under the Plan shall be determined by the Committee but shall not be less 
than 100% of the fair market value of the Common Stock at the date of 
granting of such option.  The option price for options granted under the Plan 
which do not qualify as Incentive Stock Options shall also be determined by 
the Committee but may be less than 100% of the fair market value of the 
Common Stock.  For purposes of the preceding sentence and for all other 
valuation purposes under the Plan, the fair market value of the Common Stock 
shall be as reasonably determined by the Committee, but shall not be less 
than the average of the closing representative bid and asked prices of the 
Common Stock as reported on the National Association of Securities Dealers 
Automated Quotation System, if applicable, or, if the Common Stock is then 
traded on a national securities exchange, the closing price of the stock on 
such exchange on the date as of which fair market value is being determined.  
If on the date of grant of any option granted under the Plan, the Common 
Stock of the Company is not publicly traded, the Committee shall make a good 
faith attempt to satisfy the option price requirement of this Section 5 and 
in connection therewith shall take such action as it deems necessary or 
advisable.

     6. TERM.  Each option and all rights and obligations thereunder shall, 
subject to the provisions of Section 10, expire on the date determined by the 
Committee and specified in the option agreement.  The Committee shall be 
under no duty to provide terms of like duration for options granted under the 
Plan, but the term of an option may not extend more than ten (10) years from 
the date of granting the option.

     7.  EXERCISE OF OPTION.  

           (a)  The Committee shall have full and complete authority to 
determine, subject to Section 10 herein, whether the option will be 
exercisable in full at any time or from time to time during the term of the 
option, or to provide for the exercise thereof in such installments, upon the 
occurrence of such events and at such time during the term of the option as 
the Committee may determine.

           (b)  No Incentive Stock Option granted before January 1, 1987, 
shall be exercisable while there is outstanding (within the meaning of 
subsection (c)(7) of Section 422A of the Code) any other Incentive Stock 
Option which was previously granted to the optionee to purchase stock in the 
Company or in a corporation which (at the time of the grant) was a parent or 
subsidiary corporation of the Company, or a predecessor corporation of any of 
such corporations.

<PAGE>

           (c)  The exercise of any option granted hereunder shall only be 
effective at such time as counsel to the Company shall have determined that 
the issuance and delivery of Common stock pursuant to such exercise will not 
violate any state or federal securities or other laws.  An optionee desiring 
to exercise an option may be required by the Company, as a condition of the 
effectiveness of any exercise of an option granted hereunder, to agree in 
writing that all Common Stock to be acquired pursuant to such exercise shall 
be held for his or her own account without a view to any further distribution 
thereof, that the certificates for such shares shall bear an appropriate 
legend to that effect and that such shares will not be transferred or 
disposed of except in compliance with applicable federal and state securities 
laws.  The Company may, in its sole discretion, defer the effectiveness of 
any exercise of an option granted hereunder in order to allow the issuance of 
Common Stock pursuant thereto to be made pursuant to registration or an 
exemption from registration or other methods for compliance available under 
federal or state securities laws.  The Company shall be under no obligation 
to effect the registration pursuant to the Securities Act of 1933 of any 
Common Stock to be issued hereunder or to effect similar compliance under any 
state laws.  The Company shall inform the optionee in writing of its decision 
to defer the effectiveness of the exercise of an option granted hereunder.  
During the period that the effectiveness of the exercise of an option has 
been deferred, the optionee may, by written notice, withdraw such exercise 
and obtain the refund of any amount paid with respect thereto.

           (d)  An optionee electing to exercise an option shall give written 
notice to the Company of such election and of the number of shares subject to 
such exercise.  The full purchase price of such shares shall be tendered with 
such notice of exercise.  Payment shall be made to the Company either in cash 
(including check, bank draft or money order), or, at the discretion of the 
Committee, (i) by delivering the Company's Common Stock already owned by the 
Optionee having a fair market value equal to the full purchase price of the 
shares, or (ii) a combination of cash and such shares; provided, however, 
that an optionee shall not be entitled to tender shares of the Company's 
Common Stock pursuant to successive, substantially simultaneous exercises of 
options granted under this or any other stock option plan of the Company.  
The fair market value of such shares shall be determined as provided in 
Section 5 herein.  Until such person has been issued a certificate or 
certificates for the shares subject to such exercise, he shall possess no 
rights as a stockholder with respect to such shares.

     8.  ADDITIONAL RESTRICTIONS

The Committee shall have full and complete authority to determine whether all 
or any part of the Common Stock of the Company acquired upon exercise of any 
of the options granted under the Plan shall be subject to restrictions on the 
transferability thereof or any other restrictions affecting in any manner the 
Optionee's rights with respect thereto.

     9.  ALTERNATIVE STOCK APPRECIATION RIGHTS.

           (a)  GRANT.  At the time of grant of an option under the Plan (or 
at any time thereafter as to options which are not Incentive Stock Options), 
the Committee, in its discretion, may grant to the holder of such option an 
alternative Stock Appreciation Right ("SAR") for all or any part of the 
number of shares covered by the holder's option.  Any such SAR may be 
exercised as an alternative, but not in addition to, an option granted 
hereunder, and any exercise of an SAR shall reduce an option by the same 
number of shares as to which the SAR is exercised.  An SAR granted to an 
optionholder shall provide that such SAR, if exercised, must be exercised 
within the time period specified therein.  Such specified time period may be 
less than (but may not be greater than) the time period during which the 
corresponding option may be exercised. An SAR may be exercised only when the 
corresponding option is eligible to be exercised.  The failure of the holder 
of an SAR to exercise such SAR within the time period specified shall not 
reduce his option rights.  If an SAR is granted for a number of shares less 
than the total number of shares covered by the corresponding option the 
Committee may later (as to options which are not Incentive Stock Options) 
grant to the optionholder an additional SAR covering additional shares, 
provided, however, that the aggregate amount of all SARs held by any 
optionholder shall at no time exceed the total number of shares covered by 
his unexercised options.

           (b)  EXERCISE.  The holder of any option which by its terms is 
exercisable who also holds an SAR may, in lieu of exercising his option, 
elect to exercise his SAR, subject, however, to the limitation on time of 
exercise hereinafter set forth.  Such SAR shall be exercised by the delivery 
to the Company of a written notice 

<PAGE>

which shall state that the optionee elects to exercise his SAR as to the 
number of shares specified in the notice and which shall further state what 
portion, if any, of the SAR exercise amount (hereinafter defined) the holder 
thereof requests be paid to him in cash and what portion, if any, he requests 
be paid to him in Common Stock of the Company.  The Committee promptly shall 
cause to be paid to such holder the SAR exercise amount either in cash, in 
Common Stock of the Company, or any combination of cash and stock as the 
Committee may determine.  Such determination may be either in accordance with 
the request made by the holder of the SAR or in the sole and absolute 
discretion of the Committee.  The SAR exercise amount is the excess of the 
fair market value of one share of the Company's Common Stock on the date of 
exercise over the per share option price for the option in respect of which 
the SAR was granted multiplied by the number of shares as to which the SAR is 
exercised.  For the purposes hereof, the fair market value of the Company's 
shares shall be determined as provided in Section 5 herein.  An SAR may be 
exercised only when the SAR exercise amount is positive.

           (c)  LIMITATION ON DATE OF EXERCISE.  A SAR may not be exercised 
for cash during the first six months after the date of grant of the SAR and 
any related stock option, except that this limitation need not apply if death 
or disability of the holder occurs prior to the expiration of the six-month 
period.  Any election to receive cash in full or partial settlement of a SAR, 
and any exercise of a SAR for cash, shall be made only during the third 
business day through the twelfth business day following the release for 
publication of the Company's regular quarterly or annual summary statements 
of sales and earnings; but this restriction shall not apply to any exercise 
of a SAR for cash where the exercise date meets the following three tests: 
(i) the date is automatic or fixed in advance under the terms of the Plan, 
(ii) the date is at least six months after the date of grant of the SAR, and 
(iii) the date is outside the control of the holder.

           (d)  OTHER PROVISIONS OF PLAN APPLICABLE.  All provisions of this 
Plan applicable to options granted hereunder shall apply with equal effect to 
an SAR. No SAR shall be transferable otherwise than by will or the laws of 
descent and distribution and a SAR may be exercised during the lifetime of 
the holder thereof, only by such holder.

     10.  EFFECT OF TERMINATION OF EMPLOYMENT OR DEATH.

           (a)  In the event that an optionee shall cease to be employed by 
the Company or its subsidiaries, if any, for any reason other than his gross 
and willful misconduct or his death or disability, such optionee shall have 
the right to exercise the option at any time within three months after such 
termination of employment to the extent of the full number of shares he was 
entitled to purchase under the option on the date of termination, subject to 
the condition that no option shall be exercisable after the expiration of the 
term of the option. 

           (b)  In the event that an optionee shall cease to be employed by 
the Company or its subsidiaries, if any, by reason of his gross and willful 
misconduct during the course of his employment, including but not limited to 
wrongful appropriation of funds of his employer or the commission of a gross 
misdemeanor or felony, the option shall be terminated as of the date of the 
misconduct.

           (c)  If the optionee shall die while in the employ of the Company 
or a subsidiary, if any, or within three months after termination of 
employment for any reason other than gross and willful misconduct, or become 
disabled (within the meaning of Code Section 105(d)(4)) while in the employ 
of the Company or a subsidiary, if any, and such optionee shall not have 
fully exercised the option, such option may be exercised at any time within 
twelve months after his death or such disability by the personal 
representatives, administrators, or if applicable guardian, of the optionee 
or by any person or persons to whom the option is transferred by will or the 
applicable laws of descent and distribution, to the extent of the full number 
of shares he was entitled to purchase under the option on the date of death, 
disability or termination of employment, if earlier, and subject to the 
condition that no option shall be exercisable after the expiration of the 
term of the option.

           (d)  Nothing in the Plan or in any agreement thereunder shall 
confer on any employee any right to continue in the employ of the Company or 
any of its subsidiaries or affect, in any way, the right of the Company or 
any of its subsidiaries to terminate his employment at any time.

<PAGE>

     11.  10% PERCENT SHAREHOLDER RULE

     Notwithstanding any other provision in the Plan, if at the time an 
option is otherwise to be granted pursuant to the Plan the optionee owns 
directly or indirectly (within the meaning of Section 425(d) of the Code) 
Common Stock of the Company possessing more than ten percent (10%) of the 
total combined voting power of all classes of stock of the Company or its 
parent or subsidiary corporations, if any, (within the meaning of Section 
422A(b)(6) of the Code) then any Incentive Stock Option to be granted to such 
optionee pursuant to the Plan shall satisfy the requirements of Section 
422A(c)(8) of the Code, and the option price shall be not less than 110% of 
the fair market value of the COMMON Stock of the Company determined as 
described herein, and such option by its terms shall not be exercisable after 
the expiration of five (5) years from the date such option is granted.

     12.  NON-TRANSFERABILITY.

     No option granted under the Plan shall be transferable by an optionee, 
otherwise than by will or the laws of descent or distribution as provided in 
Section 10(c) herein.  During the lifetime of an optionee the option shall be 
exercisable only by such optionee.

     13.  DILUTION OR OTHER ADJUSTMENTS.

     If there shall be any change in the Common Stock through merger, 
consolidation, reorganization, recapitalization, stock dividend (of whatever 
amount), stock split or other change in the corporate structure, appropriate 
adjustments in the Plan and outstanding options and SAR's shall be made by 
the .Committee.  In the event of any such changes, adjustments shall include, 
where appropriate, changes in the aggregate number of shares subject to the 
Plan, the number of shares and the price per share subject to outstanding 
options and the amount payable upon exercise of outstanding SAR's, in order 
to prevent dilution or enlargement of option or SAR rights.                

     14.  AMENDMENT OR DISCONTINUANCE OF PLAN.

     The Board of Directors may amend or discontinue the Plan at any time.  
Subject to the provisions of Section 14 no amendment of the Plan, however, 
shall without shareholder approval: (i) increase the maximum number of shares 
under the Plan as provided in Section 2 herein, (ii) decrease the minimum 
option price provided in Section 5 herein, (iii) extend the maximum option 
term under Section 6, or (iv) materially modify the eligibility requirements 
for participation in the Plan.  The Board of Directors shall not alter or 
impair any option theretofore granted under the Plan without the consent of 
the holder of the option.

     15.  TIME OF GRANTING.

     Nothing contained in the Plan or in any resolution adopted or to be 
adopted by the Board of Directors or by the Stockholders of the Company, and 
no action taken by the Committee or the Board of Directors (other than the 
execution and delivery of an option), shall constitute the granting of an 
option hereunder.

     16.  EFFECTIVE DATE AND TERMINATION OF PLAN.

           (a)  The Plan was approved by the Board of Directors on March 5, 
1984, and shall be approved by the stockholders of the Company within twelve 
(12) months thereof.

           (b)  Unless the Plan shall have been discontinued as provided in 
section 14 hereof, the Plan shall terminate March 4, 1994.  No option may be 
granted after such termination, but termination of the Plan shall not, 
without the consent of the optionee, alter or impair any rights or 
obligations under any option theretofore granted.

<PAGE>
EXHIBIT 5.1

December 15, 1997

GateField Corporation
47100 Bayside Parkway
Fremont, California 94538

Re:  Registration Statement on Form S-8

Ladies and Gentlemen:

I have examined the Registration Statement on Form S-8 to be filed by you 
with the Securities and Exchange Commission on or about December 16, 1997 (the 
"Registration Statement") in connection with the registration under the 
Securities Act of 1933,of, and the related authorization for you to issue, up 
to 3,000,000 shares of your Common Stock (the "Stock") pursuant to the 
exercise of options or purchase rights granted or to be granted by you under 
your 1993 Stock Option Plan (the "1993 Plan); and up to 750,000 shares of 
your Stock pursuant to the exercise of options or purchase rights granted or 
to be granted by you under your 1996 Stock Option Plan (the "1996 Plan); and 
up to 200,000 shares of your Stock pursuant to the exercise of options or 
purchase rights granted or to be granted by you under your 1995 Non-employee 
Directors Stock Option Plan (the "1995 Plan); and up to 500,000 shares of 
your Stock pursuant to your Employee Stock Purchase Plan (the "Employee Stock 
Purchase Plan"), and up to 550,000 shares of your Stock pursuant to the 
exercise of options or purchase rights granted or to be granted by you under 
your 1984 Stock Option Plan (the "1984 Plan").

As your counsel, I have examined the proceedings taken by you in connection 
with the adoption of the 1993 Plan, the 1996 Plan, the 1995 Plan, the 
Employee Stock Purchase Plan, and the 1984 Plan and the granting of options 
thereunder.

It is my opinion that shares of Stock to be issued and sold under the 
Registration Statement and that are authorized for issuance pursuant to the 
exercise of stock options granted or to be granted under the 1993 Plan, the 
1996 Plan, the 1995 Plan, the Employee Stock Purchase Plan, and the 1984 Plan 
if issued and sold under the Registration Statement in the manner referred to 
in the relevant Prospectus associated with the Registration Statement, the 
1993 Plan, the 1996 Plan, the 1995 Plan, the Employee Stock Purchase Plan, 
and the 1984 Plan and accompanying stock options will be legally issued, 
fully paid and non-assessable.

I consent to the use of this opinion as an exhibit to the Registration 
Statement and further consent to all references to me, if any, in the 
Registration Statement and any amendments thereto.

Very truly yours,

Douglas E. Klint, Esq.


<PAGE>
EXHIBIT 23.2

INDEPENDENT AUDITORS' CONSENT

We consent to the incorporation by reference in this Registration Statement 
of GateField Corporation (formerly Zycad Corporation) on Form S-8 of our 
reports dated March 11, 1997 (April 14, 1997 as to the last paragraph of Note 
5 and as to Note 11) (which report on the financial statements expresses an 
unqualified opinion and includes an explanatory paragraph relating to an 
uncertainty of the Company's ability to continue as a going concern), 
appearing in and incorporated by reference in the Annual Report on Form 10-K 
of Zycad Corporation for the year ended December 31, 1996.

DELOITTE & TOUCHE

San Jose, California
December 15, 1997


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