20 Jan
1999
20 Jan
'99
11:43 a.m.
<Seriously, how slow can you clock a Pentium and still have it run?
I think it's dynamic processor like the 8080 so there is a minimum clock
that is likley a few Mhz.
<More generally, can you build an IMSAI style box (with more LEDs :-) aroun
<a Pentium and be able to single step the processor?
Well, the imsai front pannel would have little relevance to the activities
of the CPU due to internal cache and prefetch.
Allison
20 Jan
20 Jan
11:51 a.m.
On Wed, 20 Jan 1999, Allison J Parent wrote:
Well, the imsai front pannel would have little
relevance to the activities
of the CPU due to internal cache and prefetch.
Rumor has it that you can disable cache and prefetch by using the secret
ICE mode. Maybe BillG could commission an ICE maker to build a cool front
panel for his PC.
-- Doug
21 Jan
21 Jan
1:24 a.m.
I think it's dynamic processor like the 8080 so
there is a minimum clock
that is likley a few Mhz.
Many of the faster CPUs these days have PLLs up front, so the minimum
clock speed may be a a function of the PLLs locking window.
The 68332 had (has, as I think it is still being made) a very interesting
feature - if the crystal fails (stops oscillating), the PLL will still
keep going and generate an interupt telling you that your crystal has
died! Just do not trust what the timers on the chip say, as that PLL will
tend to drift...
William Donzelli
william(a)ans.net
9470
days inactive
9471
days old
2 comments
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