    AST RESEARCH, INC.         TECHNICAL BULLETIN #0764                  07-17-92

            AST POWER PREMIUM SYSTEMS AND HARDWARE CURSOR IMPLEMENTATION

    PROBLEM:       When using the AST Power Premium with Windows 3.X running in
                   32K color video modes, such as 640x480x32K, the mouse cursor
                   will blink when placed over areas of the Windows desktop that
                   are being redrawn.

    CAUSE:         The Western Digital 90C31 VGA controller is not specifically
                   designed to utilize the hardware cursor in 32K (16 bit) color
                   modes.  This limitation is not a problem with the Western
                   Digital controller, but is caused by the lack of a color
                   palette in 32K color mode.  In addition, mouse cursor width
                   and color availability would be adversely affected.

    AFFECTED
    SYSTEMS:       AST  Power Premium systems.

    SOLUTION:      Due to the limitations outlined above, a hardware cursor is
                   not implemented in 32K color mode.