24 Oct
2005
24 Oct
'05
9:01 a.m.
Johnny Billquist wrote:
I'd say that's wrong. Considering that the
VAX8650 microcode engine runs
at 68 MHz and manages about 7 times the 11/780, you're optimistic.
The 8650 have a very large microcode word, actually have three (or was
it four?) microcode engines running in parallell, and some very advanced
cacheing and pipelining to speed it up to get even that far.
Also compared to a smaller machine -- remember you have floating point
stuff as well
as the basic instruction set. I forgot about that too. That is a fast
engine -- about 15 ns.
Johnny