Article View: comp.arch
Article #2911Re: Compaq find problem with chip
From: Rick Kwan
Date: Mon, 06 Nov 1989 21:34
Date: Mon, 06 Nov 1989 21:34
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In article <2800@ganymede.inmos.co.uk> conor@inmos.co.uk (Conor O'Neill) writes:
>Reproduced from Electronics Weekly, Wed, November 1, 1989, front page:
>(without permission)
>
>Two design faults have been discovered in Intel's million transistor 80486
>microprocessor chip which was first unveiled last April and has been in
>production since August.
>
>Both faults are in the chip's floating point unit: one affects its ability
>to correctly calculate trigonometrical functions such as tangents, cosines
Anyone know:
1. how long (man-years and/or calendar years) it took to write
the test vectors to exercise the 486, and roughly how many
vectors are involved? (I heard that the 386 took 3 years.)
2. what kind of system was used for testing (Trillium, Sentry,
or what)?
I assume this is an absolutely full-custom chip. Yes?
Rick Kwan
Sun Microsystems - Intercontinental Operations
kenobi@sun.UUCP or kenobi%lightsabre@sun.COM
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!attcan!uunet!cs.utexas.edu!sun-barr!newstop!sun!lightsabre!kenobi From: kenobi%lightsabre@Sun.COM (Rick Kwan) Newsgroups: comp.arch,comp.sys.intel,comp.sys.ibm.pc Subject: Re: Compaq find problem with chip Message-ID: <127471@sun.Eng.Sun.COM> Date: 6 Nov 89 21:34:27 GMT References: <2719@ganymede.inmos.co.uk> <2725@ganymede.inmos.co.uk> <2800@ganymede.inmos.co.uk> Sender: news@sun.Eng.Sun.COM Reply-To: kenobi@sun.UUCP (Rick Kwan) Organization: Sun Microsystems, Mountain View Lines: 23