Article View: comp.arch
Article #1788Re: Claimed bug in 80286
From: ody
Date: Wed, 09 Aug 1989 13:08
Date: Wed, 09 Aug 1989 13:08
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2104 bytes
In article <1473@crdgw1.crd.ge.com> hammondr@sunroof.crd.ge.com (richard a hammond) writes:
| 1) Intel did not claim that there were NO chips in the field with the bug!
| Just that NEW chips didn't have the bug. Pretty shady attitude if you
| ask me. This means that if you're writing software for a '286 then you
| need to know about the bug, as Martyn said, people assume it is the
| your software's fault.
|
| 2) As pointed out in the elided part of the article and Dick Dunn's comments,
| the bug has been known for a while by some people, but I assume that it
| isn't documented by Intel?
My recollection is that the bug was documented by Intel at the time
they were selling the chip, and that they gave up a fix which was 4-5
gates (or so, 1 chip did it as I recall).
|
| 3) Seems fair to say that the bug cost them time - whether the project would
| have been late for other reasons or not.
Seems fair to say that they didn't have the bug list which matched
their CPU. It undoubtedly did cost them time.
|
| 4) Is there a way to get a list of known (and suspected?) bugs for exisiting
| chips. As a compiler writer it would be useful to know what to avoid.
| Note that compiler writers often aren't in the hardware design area that
| might have long known about a bug.
Intel has been resonably good about that, at least if you're a larger
organization than a garage.
bill davidsen (davidsen@crdos1.crd.GE.COM)
{uunet | philabs}!crdgw1!crdos1!davidsen
"Stupidity, like virtue, is its own reward" -me
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!watmath!att!dptg!rutgers!cs.utexas.edu!uunet!crdgw1!sungod!davidsen From: davidsen@sungod.crd.ge.com (ody) Newsgroups: comp.arch Subject: Re: Claimed bug in 80286 Message-ID: <1596@crdgw1.crd.ge.com> Date: 9 Aug 89 13:08:13 GMT References: <1717@brwa.inmos.co.uk> <15963@vail.ICO.ISC.COM> <852@scaup.cl.cam.ac.uk> <1473@crdgw1.crd.ge.com> Sender: news@crdgw1.crd.ge.com Reply-To: davidsen@crdos1.UUCP (bill davidsen) Organization: General Electric Corp. R&D, Schenectady, NY Lines: 32