From mboxrd@z Thu Jan 1 00:00:00 1970 From: dot at dotat.at (Tony Finch) Date: Sat, 15 Aug 2020 16:18:52 +0100 Subject: [COFF] [TUHS] A/UX [was Linux is on-topic] In-Reply-To: References: <202008141739.07EHdn2U1381389@darkstar.fourwinds.com> <4F69D0BB-C6C8-443C-A5A2-0F0C1E5578B0@cfcl.com> <20200815012003.GQ32735@mcvoy.com> Message-ID: moving to COFF ... Thomas Paulsen wrote: > >I'm sure everyone here knows this, but the Cray 1 (I think, the one > that had what looked like a circular bench seat around the bottom) was > designed like that because the clock was at the center and the clock > signal went to all the boards and was right because all the clock lines > to the boards were the same length.< > > you mean that? https://upload.wikimedia.org/wikipedia/commons/f/f7/Cray-1-deutsches-museum.jpg I found the Cray 1M site planning reference manual very interesting - here's a summary with links to the actual documents http://www.howtospotapsychopath.com/2012/06/15/they-called-it-big-iron-for-a-reason/ Tony. -- f.anthony.n.finch http://dotat.at/ Ardnamurchan Point to Cape Wrath: North or northeast 3 to 5, becoming variable 2 at times. Slight or moderate, becoming smooth or slight between Barra and Canna. Fog patches. Moderate or good, occasionally very poor.