14 Nov
2007
14 Nov
'07
4:52 p.m.
Chuck Guzis wrote:
On 14 Nov 2007 at 9:48, Eric J Korpela wrote:
I'm reasonably sure that the MicroVAX II (KA630) didn't use a cache
because
the CPU cycle time matched the memory cycle time exactly. 200ns is the
time that sticks in my mind for some reason ...
Antonio
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14/11/2007 09:27
Ah, the good old days when processor and memory
operated at nearly
the same speed.
That hasn't been true probably since the 1950's. Core was slow
compared to CPU speeds and drum was even slower, particularly if
random access was employed. Modern memory is actually a closer match
to CPU speed than drum ever was.