home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.os.os2.advocacy
- Path: sparky!uunet!haven.umd.edu!wam.umd.edu!rsrodger
- From: rsrodger@wam.umd.edu (Yamanari)
- Subject: Re: The Cyrix Issue...
- Message-ID: <1993Jan11.134151.12062@wam.umd.edu>
- Sender: usenet@wam.umd.edu (USENET News system)
- Nntp-Posting-Host: rac1.wam.umd.edu
- Organization: University of Maryland, College Park
- References: <1iqhtjINNdav@gap.caltech.edu> <1993Jan11.023720.22106@wam.umd.edu> <1993Jan10.233443.7189@gw.wmich.edu>
- Date: Mon, 11 Jan 1993 13:41:51 GMT
- Lines: 33
-
- 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.
-
- --
- 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.
-