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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 05539315.EXE 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