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