Date: Mon, 13 May 1996 14:29:42 -0400 (EDT) From: "matthew c. mead" <mmead@Glock.COM> To: blh@nol.net (Brett L. Hawn) Cc: jgreco@brasil.moneng.mei.com, hackers@FreeBSD.ORG, hardware@FreeBSD.ORG Subject: Re: Triton chipset with 256k cache caches 32M only? Message-ID: <199605131829.OAA02591@neon.Glock.COM> In-Reply-To: <Pine.SOL.3.93.960513132335.12515C-100000@dazed.nol.net> from "Brett L. Hawn" at May 13, 96 01:24:52 pm
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Brett L. Hawn writes: > On Mon, 13 May 1996, matthew c. mead wrote: > > Joe Greco writes: > > > > I've got two machine with moderately fast CPUs in > > > > them. One is a Cyrix 6x86 120+ (@100Mhz), and the other > > > > is a P90 (clocked to 100Mhz). When I have 40M in the > > > > machines, the upper 8M is not cached, and my performance > > > > is roughly 2/3 of that when they just have 32M and all of > > > > the memory is cached. > > > > Does anyone know for sure whether or not 256K cache > > > > Triton chipsets only cache up to 32M? Anyone know what > > > > I can do to get the other 8M cached as well? I'd really > > > > like to have that extra 8M in there, but at 2/3 the > > > > performance, it aint gonna happen. Any help is greatly > > > > appreciated! > > > My impression was 64M, based on past discussions with Rod > > > Grimes. > > Hmm. That would then imply that there's something wrong > > with each of these boards, or that the manufacturer is lazy. > > Does anyone know if going to 512K cache will allow me to > > cache on all 40M ram? Thanks! > Assuming that these are Triton-1 chipsets you will find that > anything over 64m leads to non-caching. I would highly suggest > getting some of the new ASUS (just my particular favorite) tr-2 > chipset motherboards, these solve the caching problem along > with many of the other inherent bugs of tr-1 chipsets. Well, I'm positive that anything over 64M will lead to non-caching. I'm also positive that anything over 32M leads to non-caching. Any ideas on what I should do to get the upper 8M (megs 32-39) cached? I'm thinking of purchasing a 512k COAST module, but I want to make sure that will do it before I buy it. -matt -- Matthew C. Mead mmead@Glock.COM http://www.Glock.COM/~mmead/
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