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Article #613301Re: System/360--detailed engineering description (AFIPS 1964)
From: Jon Elson
Date: Thu, 10 Aug 2017 19:07
Date: Thu, 10 Aug 2017 19:07
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hanc...@bbs.cpcn.com wrote: > The AFIPS bulletin for 1964 (link below) contains a detailed > engineering description of S/360, including the model 30. > Interesting reading, good history, explains the logic circuits. > > http://bitsavers.informatik.uni- stuttgart.de/pdf/afips/1964-10_%2326_Part_1.pdf > pg 205 Very interesting stuff! I've been digging into some of the 7094 docs, and found that the 7094 was a VERY sophisticated machine. For instance, they apparently had Booth's tree multiply/divide hardware, as the integer multiplies ran 2 - 4 machine cycles, the divides 4-9 cycles, and the floating point multiply/divides were roughly twice that. Well, that explains where the 240K transistors went! So, in fact, mid-scale 360's were a DOWN-grade from a 7094! I don't quite know what the actual execution times were, but I'm guessing only something like a 360/65 could beat it. The last version of the 7094 also had pretty darn fast memory. Jon
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