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- Xref: sparky comp.arch:8969 comp.sys.ibm.pc.hardware:22260
- Path: sparky!uunet!mcsun!uknet!acorn!eoe!ahaley
- From: ahaley@eoe.co.uk (Andrew Haley)
- Newsgroups: comp.arch,comp.sys.ibm.pc.hardware
- Subject: Re: Does a 487sx shut down the 486sx??
- Message-ID: <1370@eouk9.eoe.co.uk>
- Date: 20 Aug 92 09:44:21 GMT
- References: <1992Aug19.154816.19802@hemlock.cray.com>
- Organization: EO Europe Limited, Cambridge, UK
- Lines: 36
- X-Newsreader: Tin 1.1 PL3
-
- kak1@cray.com (Kevin Kramer) writes:
- : In article <1992Aug19.155448.18248@ilinx.wimsey.bc.ca> brian@ilinx.wimsey.bc.ca (Brian J. Murrell") writes:
- : >ks3l+@andrew.cmu.edu (Kenton Shaver) writes:
- : >
- : >>Could anyone clear this up for me?
- : >>I read it in some magazine, but my ECE
- : >>friend is credulous. Will my 487sx
- : >>just shut the 486sx down and take over?
- : >
- : >That's what I heard. IMHO the 486sx is a *big scam*.
- : >
- : >To get your 486sx you buy a chip which is a functional 486dx with the
- : >co-pro disabled (yes more work than a regular 486dx - yet cheaper!).
- : >At some point in the future you need the co-pro, so you buy a 487sx, which
- : >is just the regular 486dx with a 487sx stamp on it, which shuts down the
- : >486sx crippled chip and takes over the machine running it like the 486dx
- : >it should have been!!
- : >
- : >The above is all rumour I've heard from many sources, and read in a trade
- : >rag. It is not the gospel!!
- : >
- :
- : I don't think it involves more work to make the 486sx chips, they are probably
- : rejected chips because of a fault in the math coprocessor part. So they just
- : disable that section of the chip and now they can use what once was a bad
- : chip. It is a big scam IMHO, I can't see why anyone would buy one of these.
- :
- : Kevin
-
- No, you've got out of date info. Originally the 486sx _was_ a 486
- with the FPU disabled. AFAIK, Intel now have a 486sx die without the
- FPU, which is much cheaper to produce because it is much smaller.
- Intel get up my nose too, but this isn't really a scam. I wouldn't
- buy one, though.
-
- Andrew.
-