On Aug 1, 2021, at 2:45 PM, ben via cctalk <cctalk
at classiccmp.org> wrote:
On 2021-08-01 12:32 p.m., Chuck Guzis via cctalk wrote:
Would the 68K have succeeded if it were not for
Apple and Commodore?
--Chuck
I suspect if they had the proper virtual memory, it would have been
picked
up as a Unix cpu, instead. It is the only common non segemented 16 bit cpu I can think in
that time frame.
Apollo built a workstation company around the 68000. That was hairy because that chip
doesn't handle page faults right. I think they used two of them, running in lock step
one cycle apart so the one behind could be used to save state at a paging exception and
allow it to be restored.
In the 68010 that design oversight was fixed and page faults became properly restartable.
paul