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- From: 177wardell@gw.wmich.edu
- Newsgroups: comp.os.os2.advocacy
- Subject: Re: The Cyrix Issue...
- Message-ID: <1993Jan11.224549.7206@gw.wmich.edu>
- Date: 11 Jan 93 22:45:49 EST
- References: <1iqhtjINNdav@gap.caltech.edu> <1993Jan11.023720.22106@wam.umd.edu> <1993Jan10.233443.7189@gw.wmich.edu> <1993Jan11.134151.12062@wam.umd.edu>
- Organization: Western Michigan University
- Lines: 44
-
- In article <1993Jan11.134151.12062@wam.umd.edu>, rsrodger@wam.umd.edu (Yamanari) writes:
- > In article <1993Jan10.233443.7189@gw.wmich.edu> x90wardell@gw.wmich.edu writes:
- >>In article <1993Jan11.023720.22106@wam.umd.edu>, rsrodger@wam.umd.edu (Yamanari) writes:
- >> What we have here is a basic disagreement. I have read in numerous
- >>articles that the Cyrix 486 chip is exactly what was said above:
- >>a 386sx with a 2K onchip cache and a few extra instructions that
- >>are math related. It is NOT a 486 class processor (in terms of
- >>compatibility).
- >
- >
- > The Cyrix chips _are_ 486 chips. They have ALL of the 486
- > instructions (bswap, etc).
- >
- > The differences between the 486SX and the 486SLC/DLC are:
- >
- > 1. The 486 has an 8k cache, the Cyrix chips have a _1_k cache.
- > (not a 2k cache)
- > 2. The 486 uses the 486 pinout, the Cyrix chips are drop in
- > replacements for 386DX (DLC) and 386SX (SLC) chips.
- > 3. the 486 has a built in FPU. The Cyrix chips implement the
- > FPU externally, in the FastMath coprocessor.
- >
- > Obviously, none of the above differences have anything to do with
- > compatibility with a 486SX or DX (if you add the coprocessor). they
- > will result in performance differences, nothing more.
- >
- > If these are not "486 class processors" it is strictly a matter
- > of performance, NOT compatibility.
-
- I still stand by my original post (except I agree, it is a 1K
- cache, not 2K). I have read over and over again that Cyrix's 486SLC is
- only called a 486 for marketting reasons and that it is still basically
- a 386sx (16bit bus, 24bit address, tec) with a few added instructions.
-
- -Brad
-
-
-
- >
- > --
- > Blaming "society" for your problems is like blaming clouds for rain.
- > --- boycott == coercion == censorship == closed mindedness == cowardice ---
- > "Psalms 23:1 The LORD is my shepherd; I shall not want."
- > Shepherds are for sheep. ----- Pain teaches.
-