Charles Dickman <chd at chdickman.com> wrote:
There are indications in the KDJ11-B processor spec on
bitsavers that
the M8190 could be used in a multiprocessor configuration. For
example, bit 10 of the Maintenance Register (17 777 750) is labeled
"Multiprocessor Slave" and indicates that the bus arbitrator is
disabled. There is also section 6.6, "Cache Multi-Processor Hooks",
that describes cache features that allow multiprocessor operation.
Would it be as simple as connecting to 11/83 qbus together? And adding
the proper software.
Anybody ever heard of such a thing?
Such a system was put together and tested at DEC with the RSX group
(who did the PDP-11/74 multiprocessor work). I'm told that while it
worked, it wasn't terrible successful, and the project was abandoned.
I was given a gift of one of the CPU modules that was used in the test
and I might still have it around here. I can't recall for certain,
but I think the module required some ECOs to make it work in a
multi-processor configuration.
The person to ask about this, Brian McCarthy, is unfortunately no
longer with us. :-(
Alan Frisbie