29 May
2009
29 May
'09
12:56 a.m.
On 28 May 2009 at 20:09, Patrick Finnegan wrote:
For certain, ILLIAC, but the 6500 was 2 6400 CPUs sharing a common
memory and PPU set. Doubtless there were other 60's era machines to
do the same, but no others readily come to mind. Each CPU in the
6500 had no hardware-defined way to tell what the other was doing.
The PPUs could exchange jump them selectively and I seem to recall
that when CEJ/MEJ came along, one or the other, but not both, could
be in monitor mode.
--Chuck
CDC 6500?
(Purdue used to own one). There's also the 6700
(6600+6400 in the same box).
Perhaps, but I don't own one of those, so it didn't spring to mind. :)
Of course, there were a large number of master/slave CPU arrangements
from various computer vendors as well before SMP (or at least before
it was popular).