19 Apr
2008
19 Apr
'08
8:29 a.m.
On Sat, Apr 19, 2008 at 11:02:59AM -0400, der Mouse wrote:
Were they 68000s, though? All the ones double-fault-fix machines I
know of were, I think, using 68010s.
I've never seen a Metheus machine, but I am *certain* the Perkin-Elmer
was dual MC68000 processors, not MC68010.
Besides... you don't _need_ to do funky tricks to implement paged-demand
VM on a 68010... it saves enough state on the stack during a page fault
to restart where it left off when it crossed the page boundary.
That should be one of the reasons the AT&T UNIX PC (7300?) had a 68010
in it - easy-to-implement VM.
-ethan
--
Ethan Dicks, A-333-S Current South Pole Weather at 19-Apr-2008 at 15:20 Z
South Pole Station
PSC 468 Box 400 Temp -85.7 F (-65.4 C) Windchill -116.4 F (-82.5 C)
APO AP 96598 Wind 6.1 kts Grid 81 Barometer 675.9 mb (10783 ft)
Ethan.Dicks at usap.gov http://penguincentral.com/penguincentral.html
Just out of curiosity, were there any machines out
there that were
built from multiple MC68000's CPU's?
In 1983, Metheus corp, did the
classic 68k X 2 cpus to fix the double
bus fault problem on their VLSI design workstation.