ALTERA CORP
S-8, 1995-07-17
SEMICONDUCTORS & RELATED DEVICES
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<PAGE>   1
          As filed with the Securities and Exchange Commission on July 14, 1995

                                                    Registration No. 33-________

================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549
                              ____________________

                                    Form S-8
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933

                              ____________________

                               ALTERA CORPORATION
               (Exact name of issuer as specified in its charter)

            CALIFORNIA                                     77-0016691
   (State of incorporation)                             (IRS Employer
                                                      Identification No.)

                              2610 Orchard Parkway
                        San Jose, California  95134-2020
                    (Address of principal executive offices)
                            _______________________

                             1987 Stock Option Plan
                       1987 Employee Stock Purchase Plan
                        1988 Director Stock Option Plan
                            (Full Title of the Plan)
                             ______________________

                                  RODNEY SMITH
                                   President
                               ALTERA CORPORATION
                              2610 Orchard Parkway
                        San Jose, California 95134-2020
                    (Name and address of agent for service)

                                 (408) 894-7000
         (Telephone number, including area code, of agent for service)

                            ________________________

                                   Copies to:
                           THOMAS C. DeFILIPPS, ESQ.
                       WILSON, SONSINI, GOODRICH & ROSATI
                            Professional Corporation
                               650 Page Mill Road
                        Palo Alto, California 94304-1050


================================================================================

<PAGE>   2
<TABLE>
<CAPTION>
                                      CALCULATION OF REGISTRATION FEE
========================================================================================================================


                                                                   Proposed Maximum    Proposed Maximum       Amount of
             Title of Securities                Amount to be        Offering Price         Aggregate        Registration
              to be Registered                   Registered*          Per Share*        Offering Price           Fee
========================================================================================================================
 Common Stock
 <S>                                                 <C>                <C>              <C>                 <C>
   -  1987 Stock Option Plan                         1,300,000          $50.75(1)        $65,975,000.00      $22,750.16
   -  1987 Employee Stock Purchase Plan                200,000           43.14(2)          8,628,000.00        2,975.19
   -  1988 Director Stock Option Plan                  100,000           50.75(1)          5,075,000.00        1,750.01
                                                     ---------                           --------------      ----------
                                                     1,600,000                           $79,678,000.00      $27,475.36
 TOTALS:
</TABLE>


*      All price and share amounts reflect a 2-for-1 split of the Company's
       Common Stock paid May 31, 1995, to shareholders of record on  May 10,
       1995.

(1)    Estimated in accordance with Rule 457(h) solely for the purpose of
       calculating the registration fee on the basis of the average of the high
       and low price reported by The Nasdaq National Market on
       July 12, 1995.

(2)    Estimated in accordance with Rule 457(h) solely for the purpose of
       calculating the registration fee on the basis of 85% of the average of
       the high and low price reported by The Nasdaq National Market on
       July 12, 1995.


                                      -ii-

<PAGE>   3


                                    PART II


               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3.  Information Incorporated by Reference.

         The Registrant hereby incorporates by reference in this Registration
Statement the following documents and information heretofore filed with the
Securities and Exchange Commission:

         1.      The Company's Annual Report on Form 10-K for the year ended
December 31, 1994, filed pursuant to Section 13(a) of the Securities Exchange
Act of 1934, as amended (the "Exchange Act").

         2.      The Company's Quarterly Report on Form 10-Q for the quarter
ended March 31, 1995, filed pursuant to Section 13(a) of the Exchange Act.

         3.      The Company's Report on Form 10-C as filed on May 15, 1995,
pursuant to Section 13(a) of the Exchange Act.

         4.      The Company's Current Report on Form 8-K as filed on June 9,
1995, pursuant to Section 13(a) of the Exchange Act.

         5.      The Company's Current Report on Form 8-K as filed on June 22,
1995, pursuant to Section 13(a) of the Exchange Act.

         6.      The Company's Current Report on Form 8-K as filed on June 23,
1995, pursuant to Section 13(a) of the Exchange Act.

         7.      The description of the Company's Common Stock which is
contained in the Registration Statement on Form 8-A filed on March 18, 1988,
under Section 12 of the Exchange Act, including any amendment or report filed
for the purpose of updating any such description.

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

Item 6.  Indemnification of Directors and Officers.

         The Registrant's Articles of Incorporation and Bylaws require the
Registrant to indemnify officers and directors of the Registrant to the full
extent permitted by Section 317 of the California General Corporation Law and
applicable law.  Section 317 of the California General Corporation law makes
provisions for the indemnification of officers, directors, and other corporate
agents in terms sufficiently broad to indemnify such persons, under certain
circumstances, for liabilities (including reimbursement of expenses incurred)
arising under the Securities Act of 1933, as amended (the "Securities Act").
The Registrant has entered into indemnification agreements to such effect with
its officers and directors.

Item 8.  Exhibits.

<TABLE>
<CAPTION>
            Exhibit
            Number
            ------
             <S>      <C>
              5.1     Opinion of Wilson, Sonsini, Goodrich & Rosati,
                      Professional Corporation
             10.1     1987 Stock Option Plan (Restated Effective May 10, 1995)
             10.2     1987 Employee Stock Purchase Plan (Restated Effective May 10, 1995)
             10.3     1988 Director Stock Option Plan (Restated Effective May 10, 1995)
             23.1     Consent of Price Waterhouse LLP
             23.2     Consent of Wilson, Sonsini, Goodrich & Rosati, 
                      Professional Corporation (contained in Exhibit 5.1)
             24.1     Power of Attorney (see page II-4)
</TABLE>


<PAGE>   4






Item 9. Undertakings.

         (a)     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 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.

                 (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.

         (b)     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.

         (c)     Insofar as indemnification for liabilities arising under the
Securities Act of 1933 may be permitted to directors, officers and controlling
persons of the registrant pursuant to the registrant's Bylaws, indemnification
agreements, or otherwise, the registrant has been advised that in the opinion
of the Securities and Exchange Commission such indemnification is against
public policy as expressed in the 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, 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 Act and will be governed by the final adjudication of such
issue.



                                      II-2


<PAGE>   5


                                   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 San Jose, State of California, on July 14,
1995.


                                                   ALTERA CORPORATION

                                                   By:  /s/ RODNEY SMITH
                                                       -----------------------
                                                       Rodney Smith, President




                                      II-3


<PAGE>   6


                               POWER OF ATTORNEY

         KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints Rodney Smith and Thomas J. Nicoletti
jointly and severally, his attorneys-in-fact, each with the power of
substitution, for him in any and all capacities, to sign any amendments to this
Registration Statement on Form S-8, and to file the same, with exhibits thereto
and other documents in connection therewith, with the Securities and Exchange
Commission, hereby ratifying and confirming all that each of said
attorneys-in-fact, or his substitute or substitutes, may do or cause to be done
by virtue hereof.

         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 date indicated.

<TABLE>
<CAPTION>
<S>                                        <C>                                                 <C>


         SIGNATURE                                TITLE                                                DATE
- ----------------------------               ---------------------                                ------------------


/s/ RODNEY SMITH                           President and Chief Executive Officer
- ----------------------------               (Principal Executive Officer), and                          July 14, 1995
Rodney Smith                               Chairman of the Board of Directors


/s/ THOMAS J. NICOLETI                     Vice President, Finance and Chief
- ----------------------------               Financial Officer (Principal Financial                      July 14, 1995
Thomas J. Nicoletti                        and Accounting Officer)


/s/ PAUL NEWHAGEN                          Vice President, Administration and
- ----------------------------               Director                                                    July 14, 1995   
Paul Newhagen                              

/s/ MICHAEL A. ELLISON
- ----------------------------               Director
Michael A. Ellison                                                                                     July 14, 1995


/s/ ROBERT W. REED                         Director
- ----------------------------
Robert W. Reed                                                                                         July 12, 1995

                    
                                           Director
- ----------------------------                                                                      ____________, 1995
William E. Terry
</TABLE>

                                      II-4

<PAGE>   7





                       SECURITIES AND EXCHANGE COMMISSION

                            WASHINGTON, D.C.  20549


                     _____________________________________

                                    EXHIBITS

                     _____________________________________

                       Registration Statement on Form S-8

                               Altera Corporation

                                 July 14, 1995





<PAGE>   8


                               INDEX TO EXHIBITS

<TABLE>

<CAPTION> 
      Exhibit
      Number                                      Description
- -------------------------------------------------------------------------------------------
       <S>        <C>
        5.1        Opinion of Wilson, Sonsini, Goodrich & Rosati, Professional Corporation
       10.1
                  1987 Stock Option Plan (Restated Effective May 10, 1995)
       10.2
                  1987 Employee Stock Option Plan (Restated Effective May 10, 1995)

       10.3
                  1988 Director Stock Option Plan (Restated Effective May 10, 1995)
       23.1
                  Consent of Price Waterhouse LLP

       23.2       Consent of Wilson, Sonsini, Goodrich & Rosati, Professional Corporation (Contained in
                  Exhibit 5.1)

       24.1       Power of Attorney (See page II-4)
</TABLE>






<PAGE>   1


                                 Exhibit 5.1


                                           July 14, 1995


ALTERA CORPORATION
2610 Orchard Parkway
San Jose, CA 95134-2020

         RE:     REGISTRATION STATEMENT ON S-8

Ladies and Gentlemen:

         We have examined the Registration Statement on Form S-8 to be filed by
Altera Corporation, a California corporation (the "Company"), with the
Securities and Exchange Commission on or about July 17, 1995 (the "Registration
Statement") in connection with the registration under the Securities Act of
1933, as amended, of 1,300,000 shares of Common Stock reserved for issuance
under the 1987 Stock Option Plan (the "1987 Plan"), 200,000 shares of Common
Stock reserved for issuance under the 1987 Employee Stock Purchase Plan (the
"ESPP") and 100,000 shares of Common Stock reserved for issuance under the 1988
Director Stock Option Plan (the "Director Plan") (collectively, the "Shares").
As your counsel, we have examined the proceedings taken and are familiar with
the proceedings proposed to be taken by you in connection with said issuance,
sale and payment of consideration for the Shares to be issued under the 1987
Plan, under the ESPP, or under the Director Plan, as the case may be.

         It is our opinion that, upon completion of the proceedings being taken
or contemplated to be taken by the Company prior to the issuance and sale of
the Shares pursuant to the 1987 Plan, pursuant to the ESPP, or under the
Director Plan, as the case may be, and upon completion of the proceedings being
taken by the Company in order to permit such transactions to be carried out in
accordance with the securities laws of the various states where required, the
Shares, when issued and sold in the manner referred to (i) in the 1987 Plan and
pursuant to the agreement which accompanies each grant under the 1987 Plan,
(ii) in the ESPP and pursuant to the agreement which accompanies the ESPP, or
(iii) in the Director Plan, as the case may be, will be legally and validly
issued, fully paid and nonassessable.

         We consent to the use of this opinion as an exhibit to the Registration
Statement, and further consent to the use of our name wherever appearing in the
Registration Statement and any amendments thereto.

                                        Very truly yours,


                                        WILSON, SONSINI, GOODRICH & ROSATI
                                        Professional Corporation


                                        By:  /s/ THOMAS C. DEFILIPPS
                                            ------------------------------
                                            Thomas C. DeFilipps, Member



<PAGE>   1
                                  EXHIBIT 10.1

                             1987 Stock Option Plan
                       (Restated Effective May 10, 1995)





<PAGE>   2





                               ALTERA CORPORATION

                             1987 STOCK OPTION PLAN

                       (Restated effective May 10, 1995)


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

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

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

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

                 (b)      "Code" shall mean the Internal Revenue Code of 1986,
as amended.

                 (c)      "Committee"  shall mean the Committee appointed by
the Board of Directors in accordance with paragraph (a) of Section 4 of the
Plan, if one is appointed.

                 (d)      "Common Stock" shall mean the Common Stock of the
Company.

                 (e)      "Company" shall mean Altera Corporation, a California
corporation.

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

                 (g)      "Continuous Status as an Employee or Consultant"
shall mean the absence of any interruption or termination of service as an
Employee or Consultant.  Continuous Status as an Employee or Consultant shall
not be considered interrupted in the case of sick leave, military leave, or any
other leave of absence approved by the Board (or the Committee or any other
committee of the Board); provided that, for purposes of Incentive Stock
Options, such leave is for a period of not more

<PAGE>   3

than 90 days or reemployment upon the expiration of such leave is guaranteed by
contract (including certain Company policies) or statute.

                 (h)      "Director" means a member of the Board.

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

                 (j)      "Exchange Act" means the Securities Exchange Act of
1934, as amended.

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

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

                 (m)      "Officer" means a person who is an officer of the
Company within the meaning of Section 16 of the Exchange Act and the rules and
regulations promulgated thereunder.

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

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

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

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

                 (r)      "Plan" shall mean this 1987 Stock Option Plan.

                 (s)      "Rule 16b-3" means Rule 16b-3 of the Exchange Act, or
any successor to Rule 16b-3, as in effect when discretion is being exercised
with respect to the Plan.

                 (t)      "Share" shall mean a share of the Common Stock, as
adjusted in accordance with Section 11 of the Plan.

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




                                      -2-

<PAGE>   4

         3.      Stock Subject to the Plan.  Subject to the provisions of
Section 11 of the Plan, the maximum aggregate number of shares which may be
optioned and sold under the Plan is 8,100,000 shares of Common Stock.  The
Shares may be authorized, but unissued, or reacquired Common Stock.

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

         4.      Administration of the Plan.

                 (a)      Procedure.

                            (i)   Multiple Administrative Bodies.  If permitted
by Rule 16b-3, the Plan may be administered by a Committee appointed by the
Board, which may consist of members of the Board of Directors and/or employees
of the Company, provided that any such Committee containing non-Directors shall
only be authorized to grant options and take other actions with respect to
persons who are not directors or officers of the Company subject to Section 16
of the Exchange Act.

                           (ii)   Administration With Respect to Directors and
Officers Subject to Section 16(b).  With respect to Option grants made to
Employees who are also Officers or Directors subject to Section 16(b) of the
Exchange Act, the Plan shall be administered by (A) the Board, if the Board may
administer the Plan in compliance with the rules governing a plan intended to
qualify as a discretionary plan under Rule 16b-3, or (B) a Committee designated
by the Board to administer the Plan, which Committee shall be constituted to
comply with the rules governing a plan intended to qualify as a discretionary
plan under Rule 16b-3.  Once appointed, such Committee shall continue to serve
in its designated capacity until otherwise directed by the Board.  From time to
time the Board may increase the size of the Committee and appoint additional
members, remove members (with or without cause) and substitute new members,
fill vacancies (however caused), and remove all members of the Committee and
thereafter directly administer the Plan, all to the extent permitted by the
rules governing a plan intended to qualify as a discretionary plan under Rule
16b-3.

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





                                      -3-

<PAGE>   5

                 (b)      Powers of the Board.  Subject to the provisions of
the Plan, the Board shall have the authority, in its discretion: (i) to grant
Incentive Stock Options or Nonstatutory Stock Options; (ii) to determine, upon
review of relevant information and in accordance with Section 8(b) of the Plan,
the fair market value of the Common Stock; (iii) to determine the exercise
price per share of Options to be granted, which exercise price shall be
determined in accordance with Section 8(a) of the Plan; (iv) to determine the
Employees or Consultants to whom, and the time or times at which, Options shall
be granted and the number of shares to be represented by each Option; (v) to
interpret the Plan; (vi) to prescribe, amend and rescind rules and regulations
relating to the Plan; (vii) to determine the terms and provisions of each
Option granted (which need not be identical) and, with the consent of the
holder thereof, modify or amend each Option; (viii) to accelerate or defer
(with the consent of the Optionee) the exercise date of any Option, consistent
with the provisions of Section 5 of the Plan; (ix) to authorize any person to
execute on behalf of the Company any instrument required to effectuate the
grant of an Option previously granted by the Board; and (x) to make all other
determinations deemed necessary or advisable for the administration of the
Plan.

                 (c)      Effect of Board's Decision.  All decisions,
determinations and interpretations of the Board shall be final and binding on
all Optionees and any other holders of any Options granted under the Plan.

         5.      Eligibility.

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

                 (b)      No Incentive Stock Option may be granted to an
Employee which, when aggregated with all other incentive stock options granted
to such Employee by the Company or any Parent or Subsidiary, would result in
Shares having an aggregate fair market value (determined for each Share as of
the date of grant of the Option covering such Share) in excess of $100,000
becoming first available for purchase upon exercise of one or more incentive
stock options during any calendar year.

                 (c)      Section 5(b) of the Plan shall apply only to an
Incentive Stock Option evidenced by an "Incentive Stock Option Agreement" which
sets forth the intention of the Company and the Optionee that such Option shall
qualify as an incentive stock option.  Section 5(b) of the Plan shall not apply
to any Option evidenced by a "Nonstatutory Stock Option Agreement" which sets
forth the intention of the Company and the Optionee that such Option shall be a
Nonstatutory Stock Option.





                                      -4-

<PAGE>   6

                 (d)      The Plan shall not confer upon any Optionee any right
with respect to continuation of employment or consulting relationship with the
Company, nor shall it interfere in any way with his right or the Company's
right to terminate his employment or consulting relationship at any time.

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

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

                           (ii)   In connection with his or her initial
employment, an Employee may be granted Options to purchase up to an additional
250,000 Shares which shall not count against the limit set forth in subsection
(i) above.

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

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

         6.      Term of Plan.  The Plan shall become effective upon the
earlier to occur of its adoption by the Board of Directors or its approval by
the shareholders of the Company as described in Section 17 of the Plan.  It
shall continue in effect for a term of ten (10) years unless sooner terminated
under Section 13 of the Plan.

         7.      Term of Option.  The term of each Option shall be ten (10)
years from the date of grant thereof or such shorter term as may be provided in
the Option Agreement.  However, in the case of an Incentive Stock Option
granted to an Optionee who, at the time the Option is granted, owns stock
representing more than ten percent (10%) of the voting power of all classes of
stock of the Company or any Parent or Subsidiary, the term of the Option shall
be five (5) years from the date of grant thereof or such shorter term as may be
provided in the Incentive Stock Option Agreement.

         8.      Exercise Price and Consideration.

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

                            (i)   In the case of an Incentive Stock Option





                                      -5-

<PAGE>   7

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

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

                           (ii)   In the case of a Nonstatutory Stock Option

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

                                  (B)      granted to any person, the per Share
exercise price shall be no less than 85% of the fair market value per Share on
the date of grant.

                          (iii)   In the case of an Option granted on or after
the effective date of registration of any class of equity security of the
Company pursuant to Section 12 of the Exchange Act and prior to six months
after the termination of such registration, the per Share exercise price shall
be no less than 100% of the fair market value per Share on the date of grant.

                 (b)      The fair market value shall be determined by the
Board in its discretion; provided, however, that where there is a public market
for the Common Stock, the fair market value per Share shall be the mean of the
bid and asked prices (or the closing price per share if the Common Stock is
listed on the National Association of Securities Dealers Automated Quotation
("NASDAQ") National Market System) of the Common Stock for the date of grant,
as reported in the Wall Street Journal (or, if not so reported, as otherwise
reported by the NASDAQ System) or, in the event the Common Stock is listed on a
stock exchange, the fair market value per Share shall be the closing price on
such exchange on the date of grant of the Option, as reported in the Wall
Street Journal.

                 (c)      The consideration to be paid for the Shares to be
issued upon exercise of an Option, including the method of payment, shall be
determined by the Board and may consist entirely of cash, check, promissory
note, other Shares of Common Stock having a fair market value on the date of
surrender equal to the aggregate exercise price of the Shares as to which said
Option shall be exercised, or any combination of such methods of payment, or
such other consideration and method of payment for the issuance of Shares to
the extent permitted under Sections 408 and 409 of the California General
Corporation Law.  In making its determination as to the type of consideration
to accept, the Board shall consider if acceptance of such consideration may be
reasonably expected to benefit the Company (Section 315(b) of the California
General Corporation Law).





                                      -6-

<PAGE>   8

         9.      Exercise of Option.

                 (a)      Procedure for Exercise; Rights as a Shareholder.  Any
Option granted hereunder shall be exercisable at such times and under such
conditions as determined by the Board, including performance criteria with
respect to the Company and/or the Optionee, and as shall be permissible under
the terms of the Plan; provided, however, that an Incentive Stock Option
granted prior to January 1, 1987 (the "Sequential Option") shall not be
exercisable while there is outstanding any Incentive Stock Option which was
granted, before the granting of the Sequential Option, to the same Optionee to
purchase stock of the Company, any Parent or Subsidiary, or any predecessor
corporation of such corporations.  For purposes of this provision, an Incentive
Stock Option shall be treated as outstanding until such option is exercised in
full or expires by reason of lapse of time.

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

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

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

                 (b)      Termination of Status as an Employee or Consultant.
In the event of termination of an Optionee's Continuous Status as an Employee
or Consultant (as the case may be), such Optionee may, but only within thirty
(30) days (or such other period of time, not exceeding three (3) months in the
case of an Incentive Stock Option or six (6) months in the case of a
Nonstatutory Stock Option, as is determined by the Board, with such
determination in the case of an Incentive Stock Option being made at the time
of grant of the Option) after the date of such termination (but in no event
later than the date of expiration of the term of such Option as set forth in
the Option Agreement), exercise his Option to the extent that he was entitled
to exercise it at the date of such termination.  To the extent that he was not
entitled to exercise the Option at the date of such termination, or if he does
not exercise such Option (which he was entitled to exercise) within the time
specified herein, the Option shall terminate.





                                      -7-

<PAGE>   9

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

                 (d)      Death of Optionee.  In the event of the death of an
Optionee:

                            (i)   during the term of the Option who is at the
time of his death an Employee or Consultant of the Company and who shall have
been in Continuous Status as an Employee or Consultant since the date of grant
of the Option, the Option may be exercised, at any time within six (6) months
following the date of death (but in no event later than the date of expiration
of the term of such Option as set forth in the Option Agreement), by the
Optionee's estate or by a person who acquired the right to exercise the Option
by bequest or inheritance, but only to the extent of the right to exercise that
would have accrued had the Optionee continued living and remained in Continuous
Status as an Employee or Consultant six (6) months after the date of death,
subject to the limitation set forth in Section 5(b); or

                           (ii)   within thirty (30) days (or such other period
of time not exceeding three (3) months as is determined by the Board, with such
determination in the case of an Incentive Stock Option being made at the time
of grant of the Option) after the termination of Continuous Status as an
Employee or Consultant, the Option may be exercised,  at any time within six
(6) months following the date of death (but in no event later than the date of
expiration of the term of such Option as set forth in the Option Agreement), by
the Optionee's estate or by a person who acquired the right to exercise the
Option by bequest or inheritance, but only to the extent of the right to
exercise that had accrued at the date of termination.

         10.     Non-Transferability of Options.  Options may not be sold,
pledged, assigned, hypothecated, transferred or disposed of in any manner other
than by will or by the laws of descent and distribution or pursuant to a
qualified domestic relations order as defined by the Code or Title I of the
Employee Retirement Income Security Act, or the rules thereunder.  The
designation of a beneficiary by an Optionee does not constitute a transfer.  An
Option may be exercised, during the lifetime of the Optionee, only by the
Optionee or a transferee permitted by this Section 10.

         11.     Adjustments Upon Changes in Capitalization or Merger. Subject
to any required action by the shareholders of the Company, the number of shares
of Common Stock covered by each outstanding Option, and the number of shares of
Common Stock which have been authorized for issuance under the Plan but as to
which no Options have yet been granted or which have been





                                      -8-

<PAGE>   10

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

                 In the event of the proposed dissolution or liquidation of the
Company, the Option will terminate immediately prior to the consummation of
such proposed action, unless otherwise provided by the Board.  The Board may,
in the exercise of its sole discretion in such instances, declare that any
Option shall terminate as of a date fixed by the Board and give each Optionee
the right to exercise his Option as to all or any part of the Optioned Stock,
including Shares as to which the Option would not otherwise be exercisable.  In
the event of a proposed sale of all or substantially all of the assets of the
Company, or the merger of the Company with or into another corporation, the
Option shall be assumed or an equivalent option shall be substituted by such
successor corporation or a parent or subsidiary of such successor corporation.
If, however, such successor corporation does not agree to fully assume such
options, the Board shall act to fully accelerate the vesting of all of the
shares subject to each outstanding Option such that the Optionee shall have the
right to exercise the Option as to all of the Optioned Stock, including Shares
as to which the Option would not otherwise be exercisable.  If the Board makes
an Option fully exercisable in lieu of assumption or substitution in the event
of a merger or sale of assets, the Board shall notify the Optionee that the
Option shall be fully exercisable for a period of thirty (30) days from the
date of such notice, and the Option will terminate upon the expiration of such
period.

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

         13.     Amendment and Termination of the Plan.

                 (a)      Amendment and Termination.  The Board may amend or
terminate the Plan from time to time in such respects as the Board may deem
advisable; provided that, the following revisions or amendments shall require
approval of the shareholders of the Company in the manner described in Section
17 of the Plan:





                                      -9-

<PAGE>   11

                            (i)   any increase in the number of Shares subject
to the Plan, other than in connection with an adjustment under Section 11 of
the Plan;

                           (ii)   any change in the designation of the class of
persons eligible to be granted Options; or

                          (iii)   if the Company has a class of equity
securities registered under Section 12 of the Exchange Act at the time of such
revision or amendment, any material increase in the benefits accruing to
participants under the Plan.

                 (b)      Shareholder Approval.  If any amendment requiring
shareholder approval under Section 13(a) of the Plan is made subsequent to the
first registration of any class of equity securities by the Company under
Section 12 of the Exchange Act, such shareholder approval shall be solicited as
described in Section 17 of the Plan.

                 (c)      Effect of Amendment or Termination.  Any such
amendment or termination of the Plan shall not affect Options already granted
and such Options shall remain in full force and effect as if this Plan had not
been amended or terminated, unless mutually agreed otherwise between the
Optionee and the Board, which agreement must be in writing and signed by the
Optionee and the Company.

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

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

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

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





                                      -10-

<PAGE>   12

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

         17.     Shareholder Approval.

                 (a)      Continuance of the Plan shall be subject to approval
by the shareholders of the Company within twelve (12) months before or after
the date the Plan is adopted.  If such shareholder approval is obtained at a
duly held shareholders' meeting, it must be obtained by the affirmative vote of
the holders of a majority of the outstanding shares of the Company, or if such
shareholder approval is obtained by written consent, it must be obtained by the
unanimous written consent of all shareholders of the Company; provided,
however, that approval at a meeting or by written consent may be obtained by a
lesser degree of shareholder approval if the Board determines, in its
discretion after consultation with the Company's legal counsel, that such a
lesser degree of shareholder approval will comply with all applicable laws and
will not adversely affect the qualification of the Plan under Section 422A of
the Code.

                 (b)      If and in the event that the Company registers any
class of equity securities pursuant to Section 12 of the Exchange Act, any
required approval of the shareholders of the Company obtained after such
registration shall be solicited substantially in accordance with Section 14(a)
of the Exchange Act and the rules and regulations promulgated thereunder.

                 (c)      If any required approval by the shareholders of the
Plan itself or of any amendment thereto is solicited at any time otherwise than
in the manner described in Section 17(b) hereof, then the Company shall, at or
prior to the first annual meeting of shareholders held subsequent to the later
of (1) the first registration of any class of equity securities of the Company
under Section 12 of the Exchange Act or (2) the granting of an Option hereunder
to an officer or director after such registration, do the following:

                            (i)   furnish in writing to the holders entitled to
vote for the Plan substantially the same information which would be required
(if proxies to be voted with respect to approval or disapproval of the Plan or
amendment were then being solicited) by the rules and regulations in effect
under Section 14(a) of the Exchange Act at the time such information is
furnished; and

                           (ii)   file with, or mail for filing to, the
Securities and Exchange Commission four copies of the written information
referred to in subsection (i) hereof not later than the date on which such
information is first sent or given to shareholders.





                                      -11-

<PAGE>   13

         18.     Information to Optionees.  The Company shall provide to each
Optionee, during the period for which such Optionee has one or more Options
outstanding, copies of all annual reports and other information which are
provided to all shareholders of the Company. The Company shall not be required
to provide such information if the issuance of Options under the Plan is
limited to key employees whose duties in connection with the Company assure
their access to equivalent information.





                                      -12-


<PAGE>   1


                                  EXHIBIT 10.2

                       1987 Employee Stock Purchase Plan
                       (Restated Effective May 10, 1995)






<PAGE>   2




                               ALTERA CORPORATION

                       1987 EMPLOYEE STOCK PURCHASE PLAN

                       (Restated effective May 10, 1995)


         The following constitute the provisions of the 1987 Employee Stock
Purchase Plan of Altera Corporation.

         1.      Purpose.   The purpose of the Plan is to provide employees of
the Company and its Designated Subsidiaries with an opportunity to purchase
Common Stock of the Company through accumulated payroll deductions. It is the
intention of the Company to have the Plan qualify as an "Employee Stock Purchase
Plan" under Section 423 of the Internal Revenue Code of 1986, as amended.  The
provisions of the Plan shall, accordingly, be construed so as to extend and
limit participation in a manner consistent with the requirements of that section
of the Code.

         2.      Definitions.

                 (a)      "Board"  shall mean the Board of Directors of the
Company.

                 (b)      "Code"  shall mean the Internal Revenue Code of 1986,
as amended.

                 (c)      "Common Stock"  shall mean the Common Stock, no par
value, of the Company.

                 (d)      "Company"  shall mean Altera Corporation, a
California corporation.

                 (e)      "Compensation" shall mean all regular straight-time
gross earnings, plus sales commissions and sales incentives, but exclusive of
payments for overtime, shift premium, other incentive compensation, other
incentive payments, bonuses, or other compensation.

                 (f)      "Continuous Status as an Employee" shall mean the
absence of any interruption or termination of service as an Employee.
Continuous Status as an Employee shall not be considered interrupted in the
case of a leave of absence agreed to in writing by the Company, provided that
such leave is for a period of not more than ninety (90) days or reemployment
upon the expiration of such leave is guaranteed by contract or statute.

                 (g)      "Designated Subsidiaries" shall mean the Subsidiaries
which have been designated by the Board from time to time in its sole
discretion as eligible to participate in the Plan.

<PAGE>   3

                 (h)      "Employee" shall mean any person, including an
officer, who is customarily employed for at least twenty (20) hours per week
and more than five (5) months in a calendar year by the Company or one of its
Designated Subsidiaries.

                 (i)      "Exercise Date" shall mean the last day of each
offering period of the Plan.

                 (j)      "Offering Date" shall mean the first day of each
offering period of the Plan.

                 (k)      "Plan" shall mean this Employee Stock Purchase Plan.

                 (l)      "Subsidiary"  shall mean a corporation, domestic or
foreign, of which not less than fifty percent (50%) of the voting shares are
held by the Company or a Subsidiary, whether or not such corporation now exists
or is hereafter organized or acquired by the Company or a Subsidiary.

         3.      Eligibility.

                 (a)      Any person who is an Employee as of the Offering Date
of a given offering period shall be eligible to participate in such offering
period under the Plan, subject to the requirements of paragraph 5(a) and the
limitations imposed by Section 423(b) of the Code.

                 (b)      Any provisions of the Plan to the contrary
notwithstanding, no Employee shall be granted an option under the Plan (i) if,
immediately after the grant, such Employee (or any other person whose stock
would be attributed to such Employee pursuant to Section 425(d) of the Code)
would own stock and/or hold outstanding options to purchase stock possessing
five percent (5%) or more of the total combined voting power or value of all
classes of stock of the Company or of any subsidiary of the Company; or (ii)
which permits his rights to purchase stock under all employee stock purchase
plans (described in Section 423 of the Code) of the Company and its
subsidiaries to accrue at a rate which exceeds Twenty-five Thousand Dollars
($25,000) of fair market value of such stock (determined at the time such
option is granted) for each calendar year in which such option is outstanding
at any time.

         4.      Offering Periods.  The Plan shall be implemented by one
offering during each six- (6) month period of the Plan, commencing on or about
August 16, 1988, and continuing thereafter until terminated in accordance with
paragraph 19 hereof.  The Board shall have the power to change the duration of
offering periods with respect to future offerings without shareholder approval
if such change is announced at least fifteen (15) days prior to the scheduled
beginning of the first offering period to be affected.

         5.      Participation.

                 (a)      An eligible Employee may become a participant in the
Plan by completing a subscription agreement authorizing payroll deduction, on
the form provided by the Company, and filing it with the Company's payroll
office prior to the applicable Offering Date, unless a later time for




                                      -2-

<PAGE>   4

filing the subscription agreement is set by the Board for all eligible
Employees with respect to a given offering.

                 (b)      Payroll deductions for a participant shall commence
on the first payroll following the Offering Date and shall end on the Exercise
Date of the offering to which such authorization is applicable, unless sooner
terminated by the participant as provided in paragraph 6(c) or 10.

         6.      Payroll Deductions.

                 (a)      At the time a participant files his subscription
agreement, he shall elect to have payroll deductions made on each payday during
the offering period in an amount not exceeding ten percent (10%) of the
Compensation which he receives on such payday, and the aggregate of such
payroll deductions during the offering period shall not exceed ten percent
(10%) of his aggregate Compensation during said offering period.

                 (b)      All payroll deductions made by a participant shall be
credited to his account under the Plan.  A participant may not make any
additional payments into such account.

                 (c)      A participant may discontinue his participation in
the Plan as provided in paragraph 10.  A participant may also lower to zero,
but not thereafter increase, the rate of his payroll deductions during the
offering period by notifying the Company in writing.  The decrease shall be
effective fifteen (15) days following the Company's receipt of the
notification.  Should an eligible Employee decide to again participate in the
Plan for future offering periods, he must complete and file with the Company a
new authorization for payroll deduction.

         7.      Grant of Option.

                 (a)      On the Offering Date of each offering period, each
eligible Employee participating in the Plan shall be granted an option to
purchase (at the per-share option price) up to a number of shares of the
Company's Common Stock determined by dividing such Employee's payroll
deductions accumulated during such offering period (not to exceed an amount
equal to ten percent (10%) of his Compensation during the applicable offering
period) by the option price as defined in Section 7(b) herein, subject to the
limitations set forth in Sections 3(b) and 12 hereof, and provided, however,
that in no event shall such option be exercisable for a number of shares in
excess of Twelve Thousand Five Hundred Dollars ($12,500) divided by eighty-five
percent (85%) of the fair market value of a share of the Company's Common Stock
on the Offering Date.  Fair market value of a share of the Company's Common
Stock shall be determined as provided in Section 7(b) herein.

                 (b)      The option price per share of the shares offered in a
given offering period shall be the lower of: (i) eighty-five percent (85%) of
the fair market value of a share of the Common Stock of the Company on the
Offering Date; or (ii) eighty-five percent (85%) of the fair market value of a
share of the Common Stock of the Company on the Exercise Date.  The fair market
value of the





                                      -3-

<PAGE>   5

Company's Common Stock on a given date shall be determined by the Board in its
discretion; provided, however, that where there is a public market for the
Common Stock, the fair market value per share shall be the mean of the bid and
asked prices of the Common Stock for such date, as reported in The Wall Street
Journal (or, if not so reported, as otherwise reported by the National
Association of Securities Dealers Automated Quotation (NASDAQ) System) or, in
the event the Common Stock is listed on a stock exchange, the fair market value
per share shall be the closing price on such exchange on such date, as reported
in The Wall Street Journal.

         8.      Exercise of Option.  Unless a participant withdraws from the
Plan as provided in paragraph 10, his option for the purchase of shares will be
exercised automatically on the Exercise Date of the offering period, and the
maximum number of full shares subject to option will be purchased for him at
the applicable option price with the accumulated payroll deductions in his
account.  The shares purchased upon exercise of an option hereunder shall be
deemed to be transferred to the participant on the Exercise Date.  During his
lifetime, a participant's option to purchase shares hereunder is exercisable
only by him.

         9.      Delivery.  As promptly as practicable after the Exercise Date
of each offering period, the Company shall arrange the delivery to each
participant, as appropriate, of a certificate representing the shares purchased
upon exercise of his option.  Any cash remaining to the credit of a
participant's account under the Plan at the termination of each offering period
which is insufficient to purchase a full share of Common Stock of the Company
shall be credited to the participant's account for the next offering period,
thereby reducing the maximum amount which may be withheld from Compensation
during such next offering period if it would otherwise exceed the limits set
forth in paragraphs 3(b) or 6(a), or, if requested by the participant or if the
participant has elected not to participate for such following period, shall be
returned to said participant.

         10.     Withdrawal; Termination of Employment.

                 (a)      A participant may withdraw all, but not less than
all, the payroll deductions credited to his account under the Plan at any time
prior to the Exercise Date of the offering period by giving written notice to
the Company.  All of the participant's payroll deductions credited to his
account will be paid to him promptly after receipt of his notice of withdrawal,
and his option for the current period will be automatically terminated, and no
further payroll deductions for the purchase of shares will be made during the
offering period.

                 (b)      Upon termination of the participant's Continuous
Status as an Employee prior to the Exercise Date of the offering period for any
reason, including retirement or death, the payroll deductions credited to his
account will be returned to him or, in the case of his death, to the person or
persons entitled thereto under paragraph 14, and his option will be
automatically terminated.

                 (c)      In the event an Employee fails to remain in
Continuous Status as an Employee of the Company for at least twenty (20) hours
per week during the offering period in which the





                                      -4-

<PAGE>   6

employee is a participant, he will be deemed to have elected to withdraw from
the Plan, and the payroll deductions credited to his account will be returned
to him and his option terminated.

                 (d)      A participant's withdrawal from an offering will not
have any effect upon his eligibility to participate in a succeeding offering or
in any similar plan which may hereafter be adopted by the Company.

         11.     Interest.  No interest shall accrue on the payroll deductions
of a participant in the Plan.

         12.     Stock.

                 (a)      The maximum number of shares of the Company's Common
Stock which shall be made available for sale under the Plan shall be one
million four hundred thousand (1,400,000) shares, subject to adjustment upon 
changes in capitalization of the Company as provided in paragraph 18.  If the 
total number of shares which would otherwise be subject to options granted 
pursuant to Section 7(a) hereof on the Offering Date of an offering period 
exceeds the number of shares then available under the Plan (after deduction of 
all shares for which options have been exercised or are then outstanding), the 
Company shall make a pro rata allocation of the shares remaining available for 
option grant in as uniform a manner as shall be practicable and as it shall 
determine to be equitable.  In such event, the Company shall give written 
notice of such reduction of the number of shares subject to the option to each 
Employee affected thereby, and shall similarly reduce the rate of payroll 
deductions, if necessary.

                 (b)      The participant will have no interest or voting right
in shares covered by his option until such option has been exercised.

                 (c)      Shares to be delivered to a participant under the
Plan will be registered in the name of the participant or in the name of the
participant and his spouse.

         13.     Administration.  The Plan shall be administered by the Board
of the Company or a committee of members of the Board appointed by the Board.
The administration, interpretation or application of the Plan by the Board or
its committee shall be final, conclusive and binding upon all participants.
Members of the Board who are eligible Employees are permitted to participate in
the Plan, provided that:

                 (a)      Members of the Board who are eligible to participate
in the Plan may not vote on any matter affecting the administration of the Plan
or the grant of any option pursuant to the Plan.

                 (b)      If a committee is established to administer the Plan,
no member of the Board who is eligible to participate in the Plan may be a
member of the committee.






                                      -5-

<PAGE>   7
         14.     Designation of Beneficiary.

                 (a)      A participant may file a written designation of a
beneficiary who is to receive any shares and cash, if any, from the
participant's account under the Plan in the event of such participant's death
subsequent to the end of the offering period but prior to delivery to him of
such shares and cash.  In addition, a participant may file a written
designation of a beneficiary who is to receive any cash from the participant's
account under the Plan in the event of such participant's death prior to the
Exercise Date of the offering period.

                 (b)      Such designation of beneficiary may be changed by the
participant at any time by written notice.  In the event of the death of a
participant, and in the absence of a beneficiary validly designated under the
Plan who is living at the time of such participant's death, the Company shall
deliver such shares and/or cash to the executor or administrator of the estate
of the participant; or, if no such executor or administrator has been appointed
(to the knowledge of the Company), the Company, in its discretion, may deliver
such shares and/or cash to the spouse or to any one or more dependents or
relatives of the participant; or, if no spouse, dependent or relative is known
to the Company, then to such other person as the Company may designate.

         15.     Transferability.  Neither payroll deductions credited to a
participant's account nor any rights, with regard to the exercise of an option
or to receive shares under the Plan, may be assigned, transferred, pledged or
otherwise disposed of in any way (other than by will, the laws of descent and
distribution or as provided in paragraph 14 hereof) by the participant.  Any
such attempt at assignment, transfer, pledge or other disposition shall be
without effect, except that the Company may treat such act as an election to
withdraw funds in accordance with paragraph 10.

         16.     Use of Funds.  All payroll deductions received or held by the
Company under the Plan may be used by the Company for any corporate purpose,
and the Company shall not be obligated to segregate such payroll deductions.

         17.     Reports.  Individual accounts will be maintained for each
participant in the Plan.  Statements of account will be given to participating
Employees promptly following the Exercise Date, which statements will set forth
the amounts of payroll deductions, the per share purchase price, the number of
shares purchased and the remaining cash balance, if any.

         18.     Adjustments Upon Changes in Capitalization.  Subject to any
required action by the shareholders of the Company, the number of shares of
Common Stock covered by each option under the Plan which has not yet been
exercised and the number of shares of Common Stock which have been authorized
for issuance under the Plan but have not yet been placed under option
(collectively, the "Reserves"), as well as the price per share of Common Stock
covered by each option under the Plan which has not yet been exercised, shall
be proportionately adjusted for any increase or decrease in the number of
issued shares of Common Stock resulting from a stock split, reverse stock
split, stock dividend, combination or reclassification of the Common Stock, or
any other increase or decrease in the number of shares of Common Stock effected
without receipt of consideration by the Company; provided, however, that
conversion of any convertible securities of the Company shall not be deemed to
have been "effected without receipt of consideration."  Such adjustment shall
be made





                                      -6-

<PAGE>   8

by the Board, whose determination in that respect shall be final, binding and
conclusive.  Except as expressly provided herein, no issue by the Company of
shares of stock of any class, or securities convertible into shares of stock of
any class, shall affect, and no adjustment by reason thereof shall be made with
respect to, the number or price of shares of Common Stock subject to an option.

         In the event of the proposed dissolution or liquidation of the
Company, the offering period will terminate immediately prior to the
consummation of such proposed action, unless otherwise provided by the Board.
In the event of a proposed sale of all or substantially all of the assets of
the Company, or the merger of the Company with or into another corporation,
each option under the Plan shall be assumed or an equivalent option shall be
substituted by such successor corporation or a parent or subsidiary of such
successor corporation, unless the Board determines, in the exercise of its sole
discretion and in lieu of such assumption or substitution, that the participant
shall have the right to exercise the option as to all of the optioned stock,
including shares as to which the option would not otherwise be exercisable.  If
the Board makes an option fully exercisable in lieu of assumption or
substitution in the event of a merger or sale of assets, the Board shall notify
the participant that the option shall be fully exercisable for a period of
fifteen (15) days from the date of such notice, and the option will terminate
upon the expiration of such period.

         The Board may, if it so determines in the exercise of its sole
discretion, also make provision for adjusting the Reserves, as well as the
price per share of Common Stock covered by each outstanding option, in the
event that the Company effects one or more reorganizations, recapitalizations,
rights offerings or other increases or reductions of shares of its outstanding
Common Stock, and in the event of the Company being consolidated with or merged
into any other corporation.

         19.     Amendment or Termination.  The Board may at any time terminate
or amend the Plan.  Except as provided in paragraph 18, no such termination can
affect options previously granted, nor may an amendment make any change in any
option theretofore granted which adversely affects the rights of any
participant, nor may an amendment be made without prior approval of the
shareholders of the Company (obtained in the manner described in paragraph 21)
if such amendment would:

                 (a)      Increase the number of shares that may be issued
under the Plan;

                 (b)      Permit payroll deductions at a rate in excess of ten
percent (10%) of the participant's Compensation;

                 (c)      Change the designation of the employees (or class of
employees) eligible for participation in the Plan; or

                 (d)      If the Company has a class of equity securities
registered under Section 12 of the Securities Exchange Act of 1934, as amended
(the "Exchange Act") at the time of such amendment, materially increase the
benefits which may accrue to participants under the Plan.





                                      -7-

<PAGE>   9

         If any amendment requiring shareholder approval under this paragraph
19 of the Plan is made subsequent to the first registration of any class of
equity securities by the Company under Section 12 of the Exchange Act, such
shareholder approval shall be solicited as described in paragraph 21 of the
Plan.

         20.     Notices.  All notices or other communications by a participant
to the Company under or in connection with the Plan shall be deemed to have
been duly given when received in the form specified by the Company at the
location, or by the person, designated by the Company for the receipt thereof.

         21.     Shareholder Approval.

                 (a)      Continuance of the Plan shall be subject to approval
by the shareholders of the Company within twelve (12) months before or after
the date the Plan is adopted.  If such shareholder approval is obtained at a
duly held shareholders' meeting, it must be obtained by the affirmative vote of
the holders of a majority of the outstanding shares of the Company, or if such
shareholder approval is obtained by written consent, it must be obtained by the
unanimous written consent of all shareholders of the Company; provided,
however, that approval at a meeting or by written consent may be obtained by a
lesser degree of shareholder approval if the Board determines, in its
discretion after consultation with the Company's legal counsel, that such a
lesser degree of shareholder approval will comply with all applicable laws and
will not adversely affect the qualification of the Plan under Section 423 of
the Code.

                 (b)      If and in the event that the Company registers any
class of equity securities pursuant to Section 12 of the Exchange Act, any
required approval of the shareholders of the Company obtained after such
registration shall be solicited substantially in accordance with Section 14(a)
of the Exchange Act and the rules and regulations promulgated thereunder.

                 (c)      If any required approval by the shareholders of the
Plan itself or of any amendment thereto is solicited at any time otherwise than
in the manner described in paragraph 21(b) hereof, then the Company shall, at
or prior to the first annual meeting of shareholders held subsequent to the
later of (i) the first registration of any class of equity securities of the
Company under Section 12 of the Exchange Act; or (ii) the granting of an option
hereunder to an officer or director after such registration, do the following:

                          (1)     furnish in writing to the holders entitled to
vote for the Plan substantially the same information which would be required
(if proxies to be voted with respect to approval or disapproval of the Plan or
amendment were then being solicited) by the rules and regulations in effect
under Section 14(a) of the Exchange Act at the time such information is
furnished; and





                                      -8-

<PAGE>   10

                          (2)     file with, or mail for filing to, the
Securities and Exchange Commission four (4) copies of the written information
referred to in subsection (1) hereof not later than the date on which such
information is first sent or given to shareholders.

         22.     Conditions Upon Issuance of Shares.  Shares shall not be
issued with respect to an option unless the exercise of such option and the
issuance and delivery of such shares pursuant thereto shall comply with all
applicable provisions of law, domestic or foreign, including, without
limitation, the Securities Act of 1933, as amended, the Securities Exchange Act
of 1934, as amended, the rules and regulations promulgated thereunder, and the
requirements of any stock exchange upon which the shares may then be listed,
and shall be further subject to the approval of counsel for the Company with
respect to such compliance.

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

         23.     Term of Plan.  The Plan shall become effective upon the earlier
to occur of its adoption by the Board or its approval by the shareholders of the
Company as described in paragraph 21.  It shall continue in effect for a term of
twenty (20) years unless sooner terminated under paragraph 19.





                                      -9-

<PAGE>   1

                                  EXHIBIT 10.3

                        1988 Director Stock Option Plan
                       (Restated Effective May 10, 1995)





<PAGE>   2





                              ALTERA CORPORATION

                       1988 DIRECTOR STOCK OPTION PLAN

                      (Restated effective May 10, 1995)


         1.      Purposes of the Plan.  The purposes of this Director Stock
Option Plan are to attract and retain the best available personnel for service
as Directors of the Company, to provide additional incentive to the Outside
Directors of the Company to serve as Directors, and to encourage their
continued service on the Board.

                 All options granted hereunder shall be "non-statutory stock
options".

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

                 (a)      "Board"  shall mean the Board of Directors of the
Company.

                 (b)      "Common Stock"  shall mean the Common Stock of the
Company.

                 (c)      "Company"  shall mean Altera Corporation, a
California corporation.

                 (d)      "Continuous Status as a Director"  shall mean the
absence of any interruption or termination of service as a Director.

                 (e)      "Director"  shall mean a member of the Board.

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

                 (g)      "Exchange Act"  shall mean the Securities Exchange
Act of 1934, as amended.

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

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

                 (j)      "Optionee"  shall mean an Outside Director who
receives an Option.

                 (k)      "Outside Director"  shall mean a Director who is not
an Employee.

                 (l)      "Parent"  shall mean a "parent corporation", whether
now or hereafter existing, as defined in Section 425(e) of the Internal Revenue
Code of 1986, as amended.

<PAGE>   3

                 (m)      "Plan"  shall mean this 1988 Director Stock Option
Plan, as amended.

                 (n)      "Share"  shall mean a share of the Common Stock, as
adjusted in accordance with Section 11 of the Plan.

                 (o)      "Subsidiary"  shall mean a "subsidiary corporation",
whether now or hereafter existing, as defined in Section 425(f) of the Internal
Revenue Code of 1986, as amended.

         3.      Stock Subject to the Plan.  Subject to the provisions of
Section 11 of the Plan, the maximum aggregate number of Shares which may be
optioned and sold under the Plan is 400,000 Shares (the "Pool") of Common
Stock.  The Shares may be authorized, but unissued, or reacquired Common Stock.

                 If an Option should expire or become unexercisable for any
reason without having been exercised in full, the unpurchased Shares which were
subject thereto shall, unless the Plan shall have been terminated, become
available for future grant under the Plan.

         4.      Administration of and Grants of Options under the Plan.

                 (a)      Administrator.  Except as otherwise required herein,
the Plan shall be administered by the Board.

                 (b)      Procedure for Grants.  All grants of Options
hereunder shall be automatic and non-discretionary and shall be made strictly
in accordance with the following provisions:

                           (i)    No person shall have any discretion to select
which Outside Directors shall be granted Options or to determine the number of
Shares to be covered by Options granted to Outside Directors.

                          (ii)    Each Outside Director shall be automatically
granted an Option to purchase 20,000 Shares (the "First Option") upon the later
to occur of (A) the effective date of this Plan, as determined in accordance
with Section 6 hereof, or (B) the date on which such person first becomes an
Outside Director, whether through election by the shareholders of the Company,
appointment by the Board of Directors to fill a vacancy, or (for an employee
director) by ceasing to be employed by the Company.

                         (iii)    After the First Option has been granted to an
Outside Director, such Outside Director shall thereafter be automatically
granted an Option to purchase 5,000 Shares (a "Subsequent Option") on the day of
each annual shareholders meeting, at which such Outside Director is reelected to
an additional term, occurring after the grant date of such Outside Director's
First Option; provided, however, that in no event shall an Outside Director be
granted Options to purchase in the aggregate more than 50,000 shares.



                                      -2-

<PAGE>   4

                          (iv)    Notwithstanding the provisions of subsections
(ii) and (iii) hereof, in the event that a grant would cause the number of
Shares subject to outstanding Options plus the number of Shares previously
purchased upon exercise of Options to exceed the Pool, then each such automatic
grant shall be for that number of Shares determined by dividing the total number
of Shares remaining available for grant by the number of Outside Directors on
the automatic grant date.  Any further grants shall then be deferred until such
time, if any, as additional Shares become available for grant under the Plan
through action to increase the number of Shares which may be issued under the
Plan or through cancellation or expiration of Options previously granted
hereunder.

                           (v)    The terms of an Option granted hereunder
shall be consistent with the requirements set forth elsewhere in this plan and
shall additionally include the following:

                                  (A)      the Option shall be exercisable only
while the Outside Director remains a Director of the Company, except as set
forth in Section 9 hereof.

                                  (B)      Subsequent Options granted prior to
January 14, 1992 and all First Options shall become exercisable in installments
cumulatively with respect to 25% of the Shares on the first day of the first
year after the date of grant of such First Option and with respect to 2.083% of
the Shares for each month after such anniversary.  Subsequent Options granted
on or after January 14, 1992 shall become exercisable in installments
cumulatively with respect to 8.34% of the shares for each month beginning after
the First Option and all other Subsequent Options, if any, are fully vested.
However, in no event shall any Option be exercisable prior to obtaining
shareholder approval of the Plan in accordance with Section 17 hereof.

                 (c)      Powers of the Board.  Subject to the provisions and
restrictions of the Plan, the Board shall have the authority, in its
discretion:  (i) to determine, upon review of relevant information and in
accordance with Section 8(b) of the Plan, the fair market value of the Common
Stock; (ii) to determine the exercise price per share of Options to be granted,
which exercise price shall be determined in accordance with Section 8(a) of the
Plan; (iii) to interpret the Plan; (iv) to prescribe, amend and rescind rules
and regulations relating to the Plan; (v) to authorize any person to execute on
behalf of the Company any instrument required to effectuate the grant of an
Option previously granted hereunder; and (vi) to make all other determinations
deemed necessary or advisable for the administration of the Plan.

                 (d)      Effect of Board's Decision.  All decisions,
determinations and interpretations of the Board shall be final and binding on
all Optionees and any other holders of any Options granted under the Plan.

                 (e)      Suspension or Termination of Option.  If the President
or his designee reasonably believes that an Optionee has committed an act of
misconduct, the President may suspend the Optionee's right to exercise any
option pending a determination by the Board of Directors (excluding the Outside
Director accused of such misconduct). If the Board of Directors (excluding the
Outside Director accused of such misconduct) determines an Optionee has
committed an act of embezzlement, fraud, dishonesty, nonpayment of an obligation
owed to the Company, breach of fiduciary duty or deliberate disregard of





                                      -3-

<PAGE>   5

the Company rules resulting in loss, damage or injury to the Company, or if an
Optionee makes an unauthorized disclosure of any Company trade secret or
confidential information, engages in any conduct constituting unfair
competition, induces any Company customer to breach a contract with the Company
or induces any principal for whom the Company acts as agent to terminate such
agency relationship, neither the Optionee nor his estate shall be entitled to
exercise any option whatsoever.  In making such determination, the Board of
Directors (excluding the Outside Director accused of such misconduct) shall act
fairly and shall give the Optionee an opportunity to appear and present
evidence on Optionee's behalf at a hearing before a committee of the Board.

         5.      Eligibility.  Options may be granted only to Outside
Directors.  All Options shall be automatically granted in accordance with the
terms set forth in Section 4(b) hereof.  An Outside Director who has been
granted an Option may, if he is otherwise eligible, be granted an additional
Option or Options in accordance with such provisions.

                 The Plan shall not confer upon any Optionee any right with
respect to continuation of service as a Director or nomination to serve as a
Director, nor shall it interfere in any way with any rights which the Director
or the Company may have to terminate his directorship at any time.

         6.      Term of Plan.  The Plan shall become effective upon the
earlier to occur of its adoption by the Board of Directors or its approval by
the shareholders of the Company as described in Section 17 of the Plan.  It
shall continue in effect for a term of ten (10) years unless sooner terminated
under Section 13 of the Plan.

         7.      Term of Option.  The term of each Option shall be ten (10)
years from the date of grant thereof.

         8.      Exercise Price and Consideration.

                 (a)      Exercise Price.  The per Share exercise price for the
Shares to be issued pursuant to exercise of an Option shall be 100% of the fair
market value per Share on the date of grant of the Option.

                 (b)      Fair Market Value.  The fair market value shall be
determined by the Board in its discretion; provided, however, that where there
is a public market for the Common Stock, the fair market value per Share shall
be the mean of the bid and asked prices of the Common Stock in the
over-the-counter market on the date of grant, as reported in the Wall Street
Journal (or, if not so reported, as otherwise reported by the National
Association of Securities Dealers Automated Quotation ("NASDAQ") System) or, in
the event the Common Stock is traded on the NASDAQ National Market System or
listed on a stock exchange, the fair market value per Share shall be the
closing price on such system or exchange on the date of grant of the Option, as
reported in the Wall Street Journal.

                 (c)      Form of Consideration.  The consideration to be paid
for the Shares to be issued upon exercise of an Option shall consist entirely
of cash, check, other Shares of Common Stock having





                                      -4-

<PAGE>   6

a fair market value on the date of surrender equal to the aggregate exercise
price of the Shares as to which said Option shall be exercised, or any
combination of such methods of payment.

         9.      Exercise of Option.

                 (a)      Procedure for Exercise; Rights as a Shareholder. Any
Option granted hereunder shall be exercisable at such times as are set forth in
Section 4(b) hereof; provided, however, that no Options shall be exercisable
until shareholder approval of the Plan in accordance with Section 17 hereof has
been obtained.

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

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

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

                 (b)      Termination of Status as a Director.  In the event of
the termination of the Outside Director's Continuous Status as a Director, he
may, but only within thirty (30) days after the date of such termination,
exercise his Option to the extent that he was entitled to exercise it at the
date of such termination.  To the extent that he was not entitled to exercise
an Option at the date of such termination, or if he does not exercise such
Option (which he was entitled to exercise) within the time specified herein,
the Option shall terminate.

                 (c)      Disability of Optionee.  Notwithstanding the
provisions of Section 9(b) above, in the event a Director is unable to continue
his service as a Director with the Company as a result of his total and
permanent disability (as defined in Section 22(e)(3) of the Internal Revenue
Code), he may, but only within three (3) months from the date of termination,
exercise his Option to the extent he was entitled to exercise it at the date of
such termination.  To the extent that he was not entitled to exercise the
Option at the date of termination, or if he does not exercise such Option
(which he was entitled to exercise) within the time specified herein, the
Option shall terminate.





                                      -5-

<PAGE>   7

                 (d)      Death of Optionee.  In the event of the death of an
Optionee:

                           (i)    during the term of the Option who is at the
time of his death a Director of the Company and who shall have been in
Continuous Status as a Director since the date of grant of the Option, the
Option may be exercised, at any time within six (6) months following the date of
death, by the Optionee's estate or by a person who acquired the right to
exercise the Option by bequest or inheritance, but only to the extent of the
right to exercise that would have accrued had the Optionee continued living and
remained in Continuous Status a Director for six (6) months after the date of
death.

                          (ii)    within thirty (30) days after the termination
of Continuous Status as a Director, the Option may be exercised, at any time
within six (6) months following the date of death, by the Optionee's estate or
by a person who acquired the right to exercise the Option by bequest or
inheritance, but only to the extent of the right to exercise that had accrued
at the date of termination.

         10.     Non-Transferability of Options.  Options may not be sold,
pledged, assigned, hypothecated, transferred or disposed of in any manner other
than by will or by the laws of descent and distribution or pursuant to a
qualified domestic relations order as defined by the Code or Title I of the
Employee Retirement Income Security Act, or the rules thereunder.  The
designation of a beneficiary by an Optionee does not constitute a transfer.  An
Option may be exercised, during the lifetime of the Optionee, only by the
Optionee or a transferee permitted by this Section 10.

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

                 In the event of the proposed dissolution or liquidation of the
Company, the Option will terminate immediately prior to the consummation of
such proposed action, unless otherwise provided by the Board.  The Board may,
in the exercise of its sole discretion in such instances, declare that any
Option shall terminate as of a date fixed by the Board and give each Optionee
the right to exercise his Option as to all or any part of the Optioned Stock,
including Shares as to which the Option would not otherwise be exercisable.  In
the event of a proposed sale of all or substantially all of the assets of the
Company, or





                                      -6-

<PAGE>   8

the merger of the Company with or into another corporation, the Option shall be
assumed or an equivalent option shall be substituted by such successor
corporation or a parent or subsidiary of such successor corporation.  If
however such successor corporation does not agree to fully assume such options,
the Board shall act to fully accelerate the vesting of all of the shares
subject to each outstanding option such that the Optionee shall have the right
to exercise the Option as to all of the Optioned Stock, including Shares as to
which the Option would not otherwise be exercisable. If the Board makes an
Option fully exercisable in lieu of assumption or substitution in the event of
a merger or sale of assets, the Board shall notify the Optionee that the Option
shall be fully exercisable for a period of thirty (30) days from the date of
such notice, and the Option will terminate upon the expiration of such period.

         12.     Time of Granting Options.  The date of grant of an Option
shall, for all purposes, be the date determined in accordance with Section 4(b)
hereof.  Notice of the determination shall be given to each Outside Director to
whom an Option is so granted within a reasonable time after the date of such
grant.

         13.     Amendment and Termination of the Plan.

                 (a)      Amendment and Termination.  The Board may amend or
terminate the Plan from time to time in such respects as the Board may deem
advisable; provided that, the following revisions or amendments shall require
approval of the shareholders of the Company in the manner described in Section
17 of the Plan:

                           (i)    any increase in the number of Shares subject
to the Plan, other than in connection with an adjustment under Section 11 of
the Plan; or

                          (ii)    any change in the designation of the class of
persons eligible to be granted Options; or

                         (iii)    any material increase in the benefits
accruing to participants under the Plan; or

                          (iv)    any change in the number of shares subject to
Options to be granted hereunder or in the terms thereof as set forth in Section
4(b) hereof.

         Notwithstanding the foregoing, the provisions set forth in Section
4(b) of this Plan (and any other Sections of this Plan that affect the formula
award terms required to be specified in this Plan by Rule 16b-3) shall not be
amended more that once every six months, other than to comport with changes in
the Code, the Employee Retirement Income Security Act, or the rules thereunder.

                 (b)      Shareholder Approval.  Shareholder approval of any
amendment requiring shareholder approval under Section 13(a) of the Plan shall
be solicited as described in Section 17 of the Plan.





                                      -7-

<PAGE>   9

                 (c)      Effect of Amendment or Termination.  Any such
amendment or termination of the Plan shall not affect Options already granted
and such Options shall remain in full force and effect as if this Plan had not
been amended or terminated, unless mutually agreed otherwise between the
Optionee and the Board, which agreement must be in writing and signed by the
Optionee and the Company.

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

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

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

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

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

         17.     Shareholder Approval.

                 (a)      Continuance of the Plan shall be subject to approval
by the shareholders of the Company at or prior to the first annual meeting of
shareholders held subsequent to the granting of an Option hereunder.  If such
shareholder approval is obtained at a duly held shareholders' meeting, it may
be obtained by the affirmative vote of the holders of a majority of the
outstanding shares of the Company present or represented and entitled to vote
thereon.  If such shareholder approval is obtained by written consent, it may
be obtained by the written consent of the holders of a majority of the
outstanding shares of the Company.

                 (b)      Any required approval of the shareholders of the
Company shall be solicited substantially in accordance with Section 14(a) of
the Exchange Act and the rules and regulations promulgated thereunder.





                                      -8-

<PAGE>   10

         18.     Information to Optionees.  The Company shall provide to each
Optionee, during the period for which such Optionee has one or more Options
outstanding, copies of all annual reports to shareholders, proxy statements and
other information provided to all shareholders of the Company.





                                      -9-


<PAGE>   1



                                  EXHIBIT 23.1

                        Consent of Price Waterhouse LLP


        We hereby consent to the incorporation by reference in the Registration
Statement on Form S-8 of Altera Corporation of our report dated  January 18,
1995 appearing on page 28 of the Annual Report to Shareholders  which is
incorporated by reference in the Annual Report on Form 10-K.



PRICE WATERHOUSE LLP
San Jose, California
July 14, 1995



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