these RTL or what?
mcguire at neurotica.com
Mon Oct 8 11:21:45 CDT 2007
On Oct 6, 2007, at 10:49 AM, Allison wrote:
> The magical thing that really impacted logic design indirectly be
> it discrete transistors or the fastest of the fast was simply size.
> The faster the logic was the closer all the sourrounding bits had
> to be to capitalize on it. Otherwise the rule of thumb of 1nS/ft
> took over never minding load capacitances. Witness the Cray round
> machine (YMP?).
Many Cray designs used that trick. The original Cray-1 was C-
shaped (for more than one reason I suspect!) as was the XMP family.
Many members of the YMP family used curved segments, but only the
earlier models. The Cray-2 was also C-shaped.
Port Charlotte, FL
Farewell Ophelia, 9/22/1991 - 7/25/2007
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