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 --------------------------------------------------------------------- The information in this data sheet is subject to change without notice. AST Research, Inc. shall not be liable for technical or editorial errors or omissions contained herein; nor for incidental or consequential damages resulting from the furnishing, performance, or use of this material. This material contains information protected by copyright. No part of this material may be reproduced in any form without prior written consent from AST Research, Inc. All rights reserved. --------------------------------------------------------------------- 01