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MUPDF/DGJPP test release! (Users)

posted by Ninho(R) E-mail, 25.02.2011, 11:31

>>> Correcting the MTRR "by hand" (thanks, o my faithful TD) leads to a
> 7-fold
>>> increase in video speed measurements, using the LFB.

>> well, so now also mtrrlfbe works?

I'm awfully sorry, have to report it doesn't :(
Sorry about the delay too, I've been busy with quite different things.

Called as either MTRRLFBE LFB WC - or USER:C0000000:16384 WC, it can't set an MTRR and aborts.
VESA 3.0 SiS [16384 kB]
Silicon Integrated Systems Corp.
LFB address: C0000000h
MTRR setting failed.

Without more info on why/how it fails I can't help any more; maybe you're simply aborting as CPUID doesn't report GenuineIntel ? - I'll be happy to run a debugging version if you wish. Anyhoo, last time I was in the turbo-debugger I made a 10 instructions long that sets the LFB to "write combining" on this sytem, so I'm all set-up now :)

N.B. on the same machine "VESAtest" does set WC properly when instructed to do so, and measurements are OK.




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