Messages in this thread | | | Date | Fri, 7 Feb 1997 08:08:17 -0700 (MST) | From | Derrik Pates <> | Subject | Re: Pentium memcpy patch. Unintended effect? |
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On Fri, 7 Feb 1997 aidas@ixsrs4.ix.netcom.com wrote:
> > I patched and compiled 2.1.25 with the Pentium memcpy patch. Everything > works fine, except for Quake. Now, Quake runs a fair bit choppier. > > I'm not really concerned about Quake. I'm more concerned whether this is > some kind of defect in my hardware, or simply a side effect of the design > of Quake. The latter seems more likely. > > The system is a P133, 32MB EDO RAM, Premio motherboard (model unknown), > XFree86 3.2.
This is because the 3-D object modeling scheme used in Quake makes HEAVY use of the FPU. When you're doing large memcpy()s and such, it starts competing for access to the FPU. This is where your problem is at. If you can live with the extra bit of choppiness, go for it. I'm still on 2.0.27, and last I played Quake (Pentium 90, 16 MB RAM, S3 868 vid card w/2 MB RAM), it was not noticable to me, and I do use the Pentium memcpy patch on my box.
Derrik Pates dpates@cavern.nmsu.edu
"What'll you two lovable plush toys have?" "How 'bout a root beer popsicle and an Orange Julius? What about you, Max?" "Dishwater! And put it in a dirty glass!" -Sam & Max "Fair Wind to Java"
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