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Article #2310

Re: PENTIUM BUG: PURITY TEST (UUENCODED BINARY)

#2310
From: Keith Pritchard
Date: Mon, 14 Nov 1994 00:29
27 lines
1881 bytes
Anthony Sidaway (tony@sidaway.demon.co.uk) wrote:
: Guys,
: I'm crossposting this extract from one of the comp.sys.intel Pentium FDIV
: BUG threads to my local network's tech.pc newsgroup to try to solicit some
: local UK responses.  It's a repost of Terje Mathisen's p87test.zip.

: bug.  If you have a Pentium (wherever you're located) please extract the
: enclosed uuencoded program and run it on your system, and report the results
: here.  

This is a Pentium or better cpu, with full CPUID support:
Vendor id = "GenuineIntel"
Make = 05, stepping = 02, model = 02
It has the FDIV bug!
(1.0/824633702449.0)*824633702449.0 is not equal to 1.0!

Result from a very recent Gateway 2000 P5-90 board.... (listed on the 
board as rev10)


Cheers,
Keith
-- 
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 Keith Pritchard   |   keith@datawell.demon.co.uk   |  Its Hard to work in a
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From: keith@datawell.demon.co.uk (Keith Pritchard)
Newsgroups: comp.sys.intel,demon.tech.pc
Subject: Re: PENTIUM BUG: PURITY TEST (UUENCODED BINARY)
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Date: 14 Nov 1994 00:29:23 -0000
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