Exhibit 4(r)


                              COMMISSION AGREEMENT

PARTIES:  GARDEX INTERNATIONAL LIMITED ("GARDEX")
         (a British Virgin Islands Corporation)

          ASE (Chung-Li) Inc. ("ASECL")
         (a Taiwan Corporation)

DATE: August 1, 2003

                                    AGREEMENT

1.   Services to be rendered. ASECL hereby retains GARDEX to provide the sales
     services to ASECL as a Sales Agency with the following terms.

     To be non-exclusive world-wide sales agent for all present and future
     products and services to be specified by ASECL in writing with the
     following authority:

(a). Identify customers for ASECL products and services;

(b). Within such limitations relating to price, delivery and other key terms as
     ASECL may from time to time specify in writing, and subject to acceptance
     by ASECL (by telex or otherwise) negotiate sales contracts as ASECL's
     agent.

2.   Compensation to GARDEX. For services hereunder, ASECL shall pay monthly
     compensation to GARDEX in respect of net export sales (outside of Taiwan),
     the compensation amount is 0.50% of the total monthly export sales.

     The above scheme of compensation payment is applicable from August 1, 2003
     to July 31, 2004. Compensation payment thereafter is subject to further
     negotiation on a yearly basis between ASECL and GARDEX.

     All payments to GARDEX shall be in US dollars. Currency conversions, where
     necessary, shall be based on the prevailing free-market rates of the time
     the payment is earned (not at the time of payment) as quoted in the Wall
     Street Journal or other authoritative source.

3.   Term of Agreement. This agreement is effective from August 1, 2003 and
     shall expire on July 31, 2004 unless earlier terminated by (i) mutual
     agreement, or (ii) ASECL on at least 30 days' prior written notice with or
     without cause. Neither


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     expiration nor termination of this Agreement shall terminate the
     obligation of ASECL to pay GARDEX for services rendered with respect to
     sales following such date that result from orders received prior to such
     date.

4.   Representative and Covenants.

(a). GARDEX agree to use its best efforts to perform its obligations hereunder
     and to give priority to ASECL over all other customers of GARDEX in terms
     of management time, and efforts. GARDEX will not enter into any management
     consulting, sales, agency or similar relationship, nor engage in
     activities, that would result in a conflict with GARDEX's duties under
     this Agreement.

(b). Each party will provide to the other on a regular basis such documentation
     as may reasonably be required to enable the other party to be assured of
     compliance with this Agreement, and shall permit the other party to
     inspect its books of account and other records at such a reasonable times
     as the other party may request.

(c). All confidential information received or learned by GARDEX relating to
     ASECL's business and products shall be kept in confidence by GARDEX and
     neither used by GARDEX nor disclosed to any other person for any purpose
     outside this Agreement.

5.   Governing Law and Jurisdiction. This Agreement shall be governed and
     construed under the laws of Republic of China unless the parties agree in
     writing to voluntary arbitration. The Courts in the Republic of China
     shall have exclusive jurisdiction to hear and decide any case or
     controversy arising out of this Agreement.

     Each party consents to in person jurisdiction over it by such courts and
     to service of process by registered mail sent to its principal business
     address.


                                        ASE (Chung-Li) Inc.
                                        BY:

                                            /s/ T.S. Chen
                                            -----------------------------------


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                                        GARDEX INTERNATIONAL LIMITED
                                        BY:

                                            /s/ Philip Nicholls
                                            -----------------------------------