10 Dec
2001
10 Dec
'01
2:08 a.m.
"Carlini, Antonio" wrote:
Tweaking a MicroVAX II won't buy
you much. I doubt you could bump the
clock by much more than say 20% without
something going horribly wrong. And the
uVAX II is a fairly well balanced system:
the memory cycle is just about right for
the CPU (I think it works out that the CPU
cycle time matches the memory cycle
time - hence no need for cache).
Playing around with my 'Prehistoric' cpu, the best speed I can manage is
a memory cycle of 333 ns.( 12 Mhz/4 ). It is the I/O chips that slow me
down - not main memory. I expect much the same if you try to reto-fit
faster main memory.
--
Ben Franchuk --- Pre-historic Cpu's --
www.jetnet.ab.ca/users/bfranchuk/index.html