19 Dec
2006
19 Dec
'06
6:29 p.m.
Billy Pettit wrote:
Brent Hilpert wrote: I always
kind of liked the idea of making an entire processor out of just one basic
gate/IC type.
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Didn't Seymour Cray do this on one of his later machines? The Cray 2?
Seems like it was a 5 input And gate.
But then he always did like to minimalize. The 6600, his first big iron,
used one transistor type tied together in different ways to make gates, flip
flops and timing circuits. He used circles and squares to denote gates -
but whther they were And or Ors depended on what fed them. Ah, twas fun to
work with. And I loved the esthetics of the logic diagrams. All those
little squares and circles had a kind of magic to them.
Billy
I have a web page (http://www.cs.ubc.ca/~hilpert/e/gates/index.html)
where I'm accumulating the diversity of symbols that have been used for
logic gates. If you have a scan or reference for the Cray/6600 symbols I'd be
interested in adding them.