    AST RESEARCH, INC.         TECHNICAL BULLETIN #0925                05-10-94

        POWEREXEC SCREEN BECOMES CORRUPTED IN DOS WINDOW WHILE RUNNING WINDOWS

    PROBLEM:        When a DOS window is opened under Windows, the screen may
                    become corrupted and the text on the screen may be echoed to
                    the right.  This only happens while running DOS under
                    Windows and not in Windows applications.

    CAUSE:          The video drivers supplied with PowerExec notebook systems are
                    specifically designed to run with the internal video
                    sub-system which is based on the Western Digital 90C26 video
                    chip set.  When shipped from AST, every PowerExec notebook is
                    configured with the proper Windows video drivers.  If another
                    video driver is selected, unpredictable results may be
                    experienced.

    SYSTEMS
    AFFECTED:       All PowerExec notebook computers.

    SOLUTION:       Use the Windows video drivers that are supplied with the
                    PowerExec notebook (P/N 910601-033 Rev. A).