    AST RESEARCH, INC.        TECHNICAL BULLETIN # 1602          10/08/96

    TITLE:  CMOS Audio Settings & Token Ring

    ISSUE

       The CMOS audio settings revert back to the original default
       address (220H) after the Bravo MS or Bravo MS-T system is turned
       OFF. This leads to I/O conflicts with various Token Ring 16/4
       adapters at address A20H.

       This issue affects the following systems: 501951, 501952, 501954,
       501955, 501956, 501972, and 503043.

    BACKGROUND

       N/A

    ACTION

       Upgrade to BIOS version 1.03 (AST part number 905579-037) or
       later. File 05579037.EXE is available from any of AST's On-Line!
       services including:

          AST WWW Site:  http://www.ast.com
          AST On-Line! BBS*:  See IB0001.TXT
          CompuServe:  GO: ASTFORUM
          Prodigy:   JUMP: ASTSUPPORT

          * Refer to IB0001.TXT for a list of AST's
            international BBS numbers.

       To decompress this file, create a temporary directory on your
       hard drive, copy the downloaded file to that directory, and run
       the file.

       For additional information on the Bravo MS/MS-T system BIOS, see
       Software Bulletin # 0285 on any of AST's On-Line! services.

    NOTES

       Add-in adapters using I/O addresses 0A20, 1A20, 2A20 and 3A20
       will conflict with default I/O address 220h which is used by the
       onboard audio.

       This address is usually reserved for sound cards. In the case of
       the various 16/4 adapters, the onboard audio I/O settings in CMOS
       were changed from 220h to 280h. Please read the user
       documentation for your particular adapter.

    TAN 000319MF

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