From: cummings@hammer.prime.com (Kevin Cummings) Subject: Re: FAQ: Yes, the Dimond Stealth works in 1024x768 Date: 15 Dec 1992 19:02:29 GMT
In article <1992Dec12.121717.12683@galileo.cc.rochester.edu>, ctne_ltd@uhura.cc.rochester.edu (Chris Newbold) writes:
> In <badger.724106648@phylo> badger@phylo.life.uiuc.edu (Jonathan Badger) writes:
>
> >> My Diamond Stealth works fine with 640x480x256, but I am unable to
> >> get a higher resolution out of it.
>
> >>Uhoh, the poor wretch is S***t Out of Luck.
>
> >>The trick of getting the clock freq. right on Diamond Stealth is by
> >>doing some heavy, trade-secret, wizardry that the manufacturer won't
> >>talk about. This means that Linux won't support Diamond Sealth.
>
> >It is time to clear up this confusion. The Diamond Stealth works fine
> >in 1024x768x256 -- the trick is to run Windows first (in 1024x768). This sets
> >the clocks.
>
> >What we really need is a program that can set the clocks within Linux. I often
> >think the reason this hasn't been written is philosophical rather than
>
> I think the easiest way to do this is to put a few more instructions in
> startup.S. Just kick it into 1024x768x256 and then back to text mode. At this
> point, you can still use the BIOS.
Yes, but setup.S is getting pretty full. There's not much room left.
You'll probably want to removed some code and make it a custom patch.
> It's ugly, but at least you don't have to go back and boot DOS every time you
> need to reset the clocks...
Better would be to program the PLL directly through the IO ports. I suspect that
this will require some special LINUX system calls that I am not yet familiar
with.
> Using Diamond Stealth happily at 1024x768x256,
> -Chris
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Kevin J. Cummings ComputerVision Services
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Framingham, Mass. Framingham, Mass.
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Std. Disclaimer: "Mr. McKittrick, after careful consideration,
I've come to the conclusion that your new
defense system SUCKS..." -- War Games
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