Tony Cole's Cray-1

<From: Doug Yowza &lt;yowza(a)yowza.com&gt; <and is populated rather sparsely by chips with date codes from '80 and <'81. The chips seem to be from Fairchild primarily (the 32 F10470's loo <like they might be RAM). From Mr. Cole's "limited edition" markings, I <gather that there were 400 of these boards in his Cray-1. The Cray-1 was ECL-10k fast for it's time but low density and rams for that technology were 1 or 4k ECL bipolar. ECL had several characteristics, FAST, high power consumption and low density. The copper plate worked with a cooling system to conduct the heat away as that machine was impossible to air cool and remain that small. Why small? Conductors propagate singnals at 1nS a foot and a cable of several feet actually represented a significant delay to the overall sheme of things inside. A note: The other commonly known and slightly more recent ECL machine was the DEC VAX9000, built using ECL-100k built on custom air cooled hybrids. It also consumed power in great quantities and had special cooling considerations. <Any idea how much RAM is on the board? Can I interface the board to my <Sinclair ZX-81 to create the world's most perverse hybrid? Your could but the interface would be more than the two combined and it would eat an amazing amount of power. Allison