From: jmk@plan9.att.com jmk@plan9.att.com
Subject: aux/vga
Date: Tue, 1 Aug 1995 23:24:47 -0400 [thread overview]
Message-ID: <19950802032447.JczzxhUvDwRTmBSHoHmh4FhQpOojhzwmBNDob4phGlU@z> (raw)
the S3 chip (which one is it?) thinks it can do 2x8-bit pixels at a time
at the higher resolutions, but it sounds like it's a standard 8-bit dac and it can't
do that (the dac you gave looks like a typo), so you see the image twice.
the highest clock you can use is 80MHz in this case.
still, it shouldn't be allowed to happen, but the insides of aux/vga are a twisty
mess. more information please.
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>From cse.psu.edu!9fans-outgoing-owner Tue Aug 1 21:44:20 EDT 1995
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From: Boyd Roberts <boyd@plan9.cs.su.oz.au>
Date: Tue, 1 Aug 1995 19:19:14 -0400
To: 9fans@cse.psu.edu
Subject: aux/vga
Message-ID: <199508020919.5148.9.babig@plan9.cs.su.oz.au>
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I have a problem with aux/vga and my Quadtel S3 video board. The standard
/lib/vgadb entry wasn't working so I looked at the board and saw it had a
att20c40-80 chip in in so I changed the ramdac entry, and then reordered
link=3clock ... so it was before the ramdac entry (don't ask me how I
worked this out :-) and changed the clock field to be icd2061a.
Then I run aux/vga -l and the weirdest thing happens: I get two half
screens, side by side, which are identical; the mouse tracks in both
and 8 1/2 runs fine. I think I'm close at this stage, but I'm at a
loss to understand what's happening (the only thing I know about PC
hardware is that diskette rhymes with whiskette). Any clues?
The aux/vga and /lib/vgadb I have come from the pre-release that we have here.
next reply other threads:[~1995-08-02 3:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
1995-08-02 3:24 jmk [this message]
-- strict thread matches above, loose matches on Subject: below --
1995-08-03 0:21 aux/vga Boyd
1995-08-02 15:48 aux/vga Berry
1995-08-01 23:19 aux/vga Boyd
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