15 Aug
2020
15 Aug
'20
4:08 a.m.
On Fri, 14 Aug 2020, Larry McVoy 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.
Yep, timing was everything in those days (and I'm still amazed at the
people who believe that electricity moves at the speed of light).
Wasn't it Grace Hopper who used to demonstrate a nanosecond by holding up
a foot of wire?
-- Dave