EXHIBIT 10.5
SANWA 
BANK
CALIFORNIA

                   AMENDMENT OF COMMERCIAL CREDIT AGREEMENT
                                        
This Amendment of Commercial Credit Agreement ("Amendment") is made and entered
into this 30th day of April, 1997 by and between SANWA BANK CALIFORNIA (the
"Bank") and ATG INC (the "Borrower") with respect to the following:

This Amendment shall be deemed to be a part of and subject to that certain
commercial credit agreement between the parties hereto and dated as of April 19,
1996, as it may have been or be amended from time to time, and any and all
addenda, riders, exhibits and schedules thereto (collectively, the "Agreement").
Unless otherwise defined herein, all terms used in this Amendment shall have the
same meanings as in the Agreement. To the extent that any of the terms or
provisions of this Amendment conflict with those contained in the Agreement, the
terms and provisions contained herein shall control.

WHEREAS, the Borrower and the Bank mutually desire to extend, amend and/or
modify the Agreement.

NOW THEREFORE, for value received and hereby acknowledged, the Borrower and the
Bank agree as follows:

1. Revised Repayment of Principal. The date contained in section 2.02 D of the
Agreement, which is currently April 30, 1997, shall be modified and amended to
be May 30, 1997.

2.  Revised Expiration of the Accounts Receivable Line of Credit Facility. The
date contained in section 2.02 H of the Agreement, which is currently April 30,
1997, shall be modified and amended to be May 30, 1997.

3.  Incorporation Into Agreement. On and after the effective date of this
Amendment, each reference in the Agreement to "this Agreement", "hereunder",
hereof, "herein" or words of like import referring to the Agreement shall mean
and be referenced to the Agreement as amended by this Amendment.

4.  No Waiver. The execution, delivery and performance of this Amendment shall
not, except as expressly provided herein, constitute a waiver of any provision
of, or operate as a waiver of any right, power or remedy of the Bank under, the
Agreement.

5. Confirmation of Other Terms and Conditions. Except as specifically provided
in this Amendment, all other terms, conditions and covenants of the Agreement
which are unaffected by this Amendment shall remain unchanged and shall continue
in full force and effect and the Borrower hereby covenants and agrees to perform
and observe all terms, covenants and agreements provided for in the Agreement,
as hereby amended.


IN WITNESS WHEREOF, this Amendment has been executed by the parties hereto as of
the date first hereinabove written.

IN WITNESS WHEREOF, this Agreement has been executed by the parties hereto as of
the date first hereinabove written.

BANK:                                        BORROWER

SANWA BANK CALIFORNIA                        ATG INC.

By:___________________________________       By:________________________________
   Jo-Jo Kochaphum, Authorized Officer          Doreen Chiu, President