Article View: alt.folklore.computers
Article #821Cambridge University floating point
From: dbr... David Brooks
Date: Tue, 09 Jan 1990 15:59
Date: Tue, 09 Jan 1990 15:59
21 lines
1599 bytes
1599 bytes
This was told to me by Peter Hammersley...is he still in operation? Ferranti only made three Atlas II's. One was the Cambridge University "Titan", and a second was up the road at the CAD Centre (the third was doing secret things at Aldermaston: the black sheep of the family). Titan got the new computer lab late in the 60s, so the university computing service was moved to the CAD Centre for the duration of the lab switch. Peter was involved in running the benchmarks just to ensure the machines operated the same. They didn't. It turned out that Titan's floating-point accumulator (a complex beast with the ability to lock individual words of core while it ruminated) had been wired up wrong, and nobody had caught it. The university had placed great reliance on that faulty machine; Max Perutz (structure of haemoglobin) and Fred Hoyle were among its users. No wonder the steady state theory had problems... -- David Brooks dbr...@osf.org Open Software Foundation uunet!osf.org!dbrooks Cambridge class of '71 (the real Cambridge)
Technical Details
Message-ID:
<2529@paperboy.OSF.ORG>Path:
mbox-mo1.pugleaf.net!gmdzi!unido!mcsun!uunet!samsung!think!paperboy!osf.org!dbrooksShow Full Headers
Complete Article Headers
Path: mbox-mo1.pugleaf.net!gmdzi!unido!mcsun!uunet!samsung!think!paperboy!osf.org!dbrooks From: dbr...@osf.org (David Brooks) Newsgroups: alt.folklore.computers Subject: Cambridge University floating point Keywords: inaccuracy benchmark Message-ID: <2529@paperboy.OSF.ORG> Date: 9 Jan 90 15:59:24 GMT Sender: ne...@OSF.ORG Reply-To: dbr...@osf.org (David Brooks) Organization: Open Software Foundation Lines: 21 Posted: Tue Jan 9 16:59:24 1990 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit