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    AST RESEARCH, INC.          TECHNICAL BULLETIN # 1133A               4-27-95

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    				    MANHATTAN P ERROR IN DOS 5.0 EDIT

    PROBLEM

    A clean boot without CONFIG.SYS from the DOS 5.0 EDIT command shows a "Packed
    File Corrupt" error message on the Manhattan P system.

    CAUSE

    The Gate A20 signal is in the wrong state after the system is booted.
    Gate A20 should be disabled, but instead it was enabled by the BIOS.

    SYSTEMS AFFECTED
    AST PART NUMBER AND DESCRIPTION

    501502-XXX MANHATTAN P 5090 - All Models

    SOLUTION

    The current Manhattan P BIOS, revision 1.09 (AST Part Number 905547-038),
    has fixed the Gate A20 problem.

    File 05547038.EXE can be found on AST's BBS (817) 230-6850, in the "Systems"
    file area.  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 BIOS 1.09, see Software Bulletin # 0178C.