Stupid lusers...

From: John Ruschmeyer <jruschme_at_exit109.com>
Date: Sat Jun 6 23:25:35 1998

Ethan Dicks wrote:
> There
> was a UNIX box, made by Perkin-Elmer that had two 68000 processors
> coupled to implement page faulting. When the main processor would fault,
> the secondary would load the desired page into RAM and restart the
> primary at the new page. Ugly. That's why Sun used the 68010 early on.
> You access non-existent memory, get a page-fault trap, your kernel
> figures out where to put the wanted memory and returns from the trap.
> Your code never knows that milliseconds have elapsed.

Actually, I believe it was the original Sun 1 which used the double
68000s.
Perkin-Elmer did make a 68000 Unix box, the 7350. It actually could run
three diffent OS's:

        Personal IRIX
        Uniplus System 3
        MicroXelos (Uniplus-derived SVR2)

Interestingly, the MicroXelos kernel was smart enough to know about the
68010. If you installed one in a 7350, it would use different trap
handling code.

Tony Eros (you still out there?) has my old one which was upgraded with
a 68010.

<<<John>>>
Received on Sat Jun 06 1998 - 23:25:35 BST