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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