rmk at toad.rmkhome.com
Tue Jun 13 12:24:28 UTC 2006
Johnny Billquist said:
>> There's actually a cheesy way to do demand paging with microprocessors
>> that don't support demand paging (such as the original 68000--another
>> "16 bit" machine). The way to do this is to run two processors in parallel
>> but skewed by one instruction. If the first one does a bad memory fetch,
>> then the second one will not have fetched the instruction causing the
>> fault so contains restartable machine state. Masscomp sold a machine
>> like this once.
>Didn't the first Apollos do this?
And also the Sun 1.
Rick Kelly rmk at rmkhome.com
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