epia m vga + memcpy update
ollie at lanl.gov
Thu Sep 9 12:57:01 CEST 2004
On Thu, 2004-09-09 at 11:58, Richard Smith wrote:
> Li-Ta Lo wrote:
> >>>Did they do anything on the "core" x86emu? Last time I checked,
> >>>XF86 4.4.0 has almost the same x86emu as testbios.
> >>Something is differnt even with 4.3. I can run my ATI M1 bios under
> >>testbios and it dosen't work but X with InitPrimary enabled works.
> > Interesting. Do you have any idea why ?
> Not really. There's lots of variables. I do have machines that
> testbios does work with my M1 bios. But these machines boot a COTS bios
> rather than LB.
> For one thing I think the emu in X handles the reads and writes to the
> timer rather than letting the bios get to the hardware. The stock M1
> bios won't run under vgabios at all. The delay functions go into loops
> that only exit by chance. The X emu will run that code fine.
> I have a modified version of the M1 bios that works around the delay
> issue by effectively removing them so it runs under testbios but it
> still dosen't bring the card to life. Its possible that my "fix" is
> part of the problem since timeing can be critical but I wouldn't expect
> the emulator to running too fast and I don't think too slow would be a
So you still think it is the timer ? Did you try to access the timer
HW in testbios ?
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