19 Dec
2006
19 Dec
'06
11:40 p.m.
On Dec 19, 2006, at 7:26 PM, 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.
-------------------------
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.
Actually I believe this was the case for the Cray 1 and earlier
XMP machines.
-Dave
--
Dave McGuire
Cape Coral, FL