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AST RESEARCH, INC.          TECHNICAL BULLETIN # 1407                1-24-96

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		      Bravo MS 4/66d Lockup in Windows NT 3.51


PROBLEM

The Bravo MS 4/66d system may lock up at the log-in screen under Windows 
NT 3.51.


CAUSE

The "byte merging" feature for video memory is turned ON in BIOS versions 
prior to 3.03.


SOLUTION

Update the system to BIOS v3.03 (AST p/n 905539-315) or higher.
File <A HREF="ftp://ftp.ast.com/D-BIOS/05539315.EXE">05539315.EXE</A> can be found on AST's BBS (817) 230-6850.  
AST's BBS supports modem speeds up to 28.8k bps.  The above file will also 
be posted on: 

CompuServe 
Go ASTSUPPORT

AST Worldwide Web Site
http://www.ast.com

For additional information on the Bravo MS 4/66d system BIOS, see 
Software Bulletin # 0174 on all AST's On-Line! forums.


SYSTEMS AFFECTED
AST PART NUMBER AND DESCRIPTION

501442-XXX      Bravo MS 4/66d