out-of-mainstream minis

tony duell ard at p850ug1.demon.co.uk
Sun Jul 5 00:34:38 CDT 2015

> >> Also, there is no MMU from Motorola for the 68000, so you would have to
> >> design your own.
> >
> > What about the 68451?
> Sigh. I should learn to check things better. I thought it only was
> usable with the 68010, but apparently you could also use it with the
> 68000. My fault.

AFAIK the 68000 and 68010 hardware interfaces are much the same, the big
difference between the 2 processors is what is saved on an exception (as we
have been discussing here). And there is no reason why that would affect an

The 68451 is not a common chip, though. Most people using the 68000/68010
did indeed make their own MMUs. The machine I think of for the 68451 is the
Torch XXX which puts it alongside a 68010 (and a 68450 DMA chip).


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