Re: DUAL Systems documentation
Herb Peyerl <[email protected]>
| Newsgroups | gmane.os.netbsd.ports.m68k |
|---|---|
| Message-ID | <[email protected]> |
On Feb 22, 2014, at 3:12 AM, Erik Fair wrote: > An aside, before Motorola shipped the mc68010, I saw another solution to the faulted-instruction state save problem from MassComp: their CPU board had two mc68k CPUs on it, one running a cycle behind the other, so a page fault would stop them both, the missing page could be paged in (I think they designed their own MMU; long since forgotten), and then execution resumed on the second, following CPU which hadn't taken the memory-access fault. Throw hardware at the problem ... Isn't that what the first Apollo did? (DN100)..