    =

    AST RESEARCH, INC.         TECHNICAL BULLETIN # 1228                6-20-95

    =

    BRAVO MS VIEWSONIC 20G MONITOR

    PROBLEM

    Overscanning may occur when using a Viewsonic 20G monitor on a Bravo MS
    system.  The image going to the monitor is too large for the monitor's
    viewing area.

    CAUSE

    The Cirrus Logic Winmode video drivers, version 1.21 or earlier, are not
    compatible with the Viewsonic 20G monitor.

    SYSTEMS AFFECTED
    AST PART NUMBER AND DESCRIPTION

    501443-XXX      BRAVO MS 4-100T

    SOLUTION

    Update Winmode to version 1.22 or higher using the Cirrus Logic video
    drivers, AST part numbers 911368-313 through 318.  To obtain the VGA
    driver for Cirrus 543X, version 1.22, download the following files:

    368313.EXE
    368314.EXE
    368315.EXE
    368316.EXE
    368317.EXE
    368318.EXE

    from AST's BBS (817) 230-6850, in the "Systems" file area.  AST's BBS
    supports modem speeds up to 28.8k bps.  The above files will also be
    posted on:

    CompuServe
    Go ASTSUPPORT

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

    For additional information on the Cirrus Logic video drivers, see Software
    Bulletin 0181 in the SBS library of AST's BBS.