Exhibit 4.8
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                        INTEGRATED SILICON SYSTEMS, INC.

                           INCENTIVE STOCK OPTION PLAN

         1. Grant of Options. The proper officers of Integrated Silicon Systems,
Inc. (the "Corporation"), a North Carolina corporation, are hereby authorized by
majority vote of the Board of Directors of the Corporation to issue stock
options from time to time on the Corporation's behalf to any one or more persons
who at the date of such grant are full-time salaried employees of the
Corporation determined by the Board of Directors to be "key employees," that is,
employees important to the success of the Corporation. Any option granted under
this Plan shall be granted within ten years from the data hereof.

         2. Amount of Stock. The aggregate amount of stock which may be
purchased pursuant to options granted under this Plan shall be 81,377 shares of
the Corporation's common stock.

         3. Limitation. The amount of aggregate fair market value of the stock
(determined at the time of the grant of the option) for which any employee may
be granted options hereunder in any calendar year shall not exceed the sum of
(i) $100,000 plus (ii) a carry-over amount for any year after 1980, but prior to
the calendar year under consideration, which is determined as one half of the
amount by which $100,000 exceeds the value (at the time of the grant) of the
stock for which options were granted in any such prior year, but carried over
for not more than three years. For this purpose, options granted in any year
shall be deemed to first use up the $100,000 current year limitation, and then
the carry-over amount from the earliest available year.

         4. Exercise. Any option granted pursuant to this Plan shall contain
provisions, established by the Corporation's Beard of Directors, setting forth
the manner of exercise of such option. In no event, however, shall any option
granted to a person then owning more than 10% (including stock which must be
attributed to him) of the voting power of all classes of the Corporation's stock
be exercisable by its terms after the expiration of five years from the date of
the grant thereof, nor shall any other option granted hereunder be exercisable
by its terms after the expiration of ten years from the date of the grant
thereof.

         5. Nontransferability. The terms of any option granted under this Plan
shall include a provision making such option nontransferable by the optionee,
except upon death, and exercisable during the optionee's lifetime only by the
optionee.

         6. Purchase Price. The purchase price for a share of the stock subject
to any option granted hereunder shall be not less than the fair market value of
the stock on the date of the grant of the option, said fair market value is to
be determined in good faith at the time of the grant of such option by decision
of the Corporation's Board of Directors and said fair market value is to be
determined without regard to any restriction, other than a restriction which, by
its terms will, never lapse; provided, however, that in the case of an option
granted to any person then owning more than 10% (including stock which must be
attributed to him) of the voting power of all classes of the Corporation' s
stock, the purchase price per share of the stock subject to the option shall be
not less than 110% of the fair market value of the stock on the date of the
grant of the option, determined in good faith as aforesaid.

         7. Stockholder Approval; Effective Date. At a meeting of the
stockholders of the Corporation within the period of 12 months following the
effective date of the adoption of this Plan by the Corporation's Board of
Directors, this Plan will be presented for consideration and approval by the
stockholders. The effective date of this Plan is November 17, 1986.

         8. Stock Reserve. The Corporation shall at all times during the term of
this Plan reserve and keep available such number of shares of its common stock
as will be sufficient to satisfy the requirements of this Plan, and shall pay
all fees and expenses necessarily incurred by the Corporation in connection with
the exercise of options granted hereunder.


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         9. Other Terms. Any option granted hereunder shall contain such other
and additional terms, not inconsistent with the terms of this Plan, which are
deemed necessary or desirable by the Board of Directors, or by legal counsel to
the Corporation, and such other terms shall include those which, together with
the terms of this Plan, shall constitute such option as an "Incentive Stock
Option" within the meaning of Section 422A of the Internal Revenue Code.

                                           INTEGRATED SILICON SYSTEMS, INC.



                                           -------------------------------------
                                           James P. Poitras


                                           -------------------------------------
                                           Achilles A. Dosio