11 Apr
2007
11 Apr
'07
9:32 a.m.
As subject... do 68k CPUs cope with being underclocked? I've got a surplus
8-MHz part from an Amiga, and at the museum we've got a 68000 microprocessor
trainer which is short its CPU. I'm not sure what speed CPU the trainer
expects though (because I haven't looked in any detail :-) but it'll certainly
be 8Mhz or less.
cheers
Jules
11 Apr
11 Apr
10 a.m.
On 4/11/07, Jules Richardson <julesrichardsonuk at yahoo.co.uk> wrote:
As subject... do 68k CPUs cope with being underclocked? I've got a surplus
8-MHz part from an Amiga, and at the museum we've got a 68000 microprocessor
trainer which is short its CPU. I'm not sure what speed CPU the trainer
expects though (because I haven't looked in any detail :-) but it'll certainly
be 8Mhz or less.
Section 10.7 of the Users Manual
(http://iteso.mx/~temoc/micros/MC68000UM.pdf) indicates that 4MHz is
the minimum clock speed for an 8MHz-rated part. I've seen 4MHz-badged
parts, but it was in a 4MHz trainer from about 1982. I don't know
where you'd find performance data on a part that old.
-ethan
6470
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