Messages in this thread | | | Date | Fri, 23 Jan 1998 14:06:17 +1100 | From | Richard Gooch <> | Subject | Re: MTRR patch v1.5 |
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Chris Evans writes: > > On Mon, 19 Jan 1998, Richard Gooch wrote: > > > Hi, Linus. Below is v1.5 of my MTRR patch (set Memory Type Range > > > > Registers to speed frame-buffer access by 2.5x). It includes a patch > > by David Wragg <dpw@doc.ic.ac.uk> to properly set the passive-release > > enable bit (some BIOSes don't do this). > > Does this help at all for normal Pentiums? Isn't there some trick Windows > pulls off to speed up access to PCI cards with mapped memory on normal > Pentiums? etc.?
Pentiums don't have MTRRs. The Windows trick is probably the same linear FB access that XFree86 has been doing for years. The only difference is that M$ spends $10M on advertising this "new feature" (sure, it's new for windoze).
Regards,
Richard....
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