    AST RESEARCH, INC.         TECHNICAL BULLETIN #0710A                 10-28-91

                       SCO OPEN DESKTOP IN 800X600 VIDEO MODE

    PROBLEM:     When using the Open Desktop release 1.0 and 1.11 in SuperVGA
                 (800x600x16) mode, vertical bars and multiple horizontal images
                 are displayed on the screen.  The 640x480 and 640x350 modes work
                 fine.

    CAUSE:       The "grafinfo" file for the video contains some additional
                 information which is only required for the AST VGA Plus card.

    SYSTEMS
    AFFECTED:    All systems with integrated video.

    SOLUTION:    To fix this problem complete the following steps:
                 (Lines starting with the # sign indicate commands that should be
                 entered at the root prompt).

                 1) Bring the system down to single user mode (init 1).
                 2) # cd /usr/lib/grafinfo/paradise.
                 3) # cp vgaplus.xgi vgaplus.orig (you are saving the
                    file vgaplus.xgi as vgaplus.orig).
                 4) Edit the file vgaplus.xgi.
                 5) Search for, and remove the following two lines
                    from the file:

                 out (0x3CE,0x0B); out(0x3CF,0x44); / *256k 16 bit */
                 out (0x3CE,0x0C); out(0x3CF,0);

                 6) Save the file and exit you editor.
                 7) # mkdev graphics.
                 8) Select "update" from the main menu.
                 9) Choose the Paradise VGA Plus from the list of
                    Adapters.
                10) Choose the VGA 800x600 16-color option from the
                    list of Modes.
                11) Press return twice to accept the Default
                    configuration, and accept the current setting.
                12) Choose "Quit" from the main menu, then "save".
                    (This will update the grafinfo database to reflect
                    the changes you have made to the file).

    The system does not need to be re-booted, just go back to multiuser mode and
    ODT will now work in 800x600 mode.  This updated file will work correctly on
    the regular VGA Plus board also.