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).