Re: Multiprocessor Qbus PDP-11

On Fri, Aug 20, 2021 at 7:55 AM Paul Koning wrote: > > > > On Aug 19, 2021, at 7:39 PM, Charles Dickman via cctalk < > cctalk@classiccmp.org> wrote: > > > > There are indications in the KDJ11-B processor spec on bitsavers that the > > M8190 could be used in a multiprocessor configuration. For exa

Re: Multiprocessor Qbus PDP-11

On Aug 20, 2021, at 1:39 PM, Paul Koning via cctalk wrote: > Interestingly enough, I remember another machine that was also called 11/74; > it existed in the RSTS/E lab in Merrimack (NH). That one wasn't an MP > machine; instead, it was an 11/70 with additional microcode to add the CIS > (str

Re: Multiprocessor Qbus PDP-11

On Aug 19, 2021, at 4:39 PM, Charles Dickman via cctalk 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" >

Re: Multiprocessor Qbus PDP-11

> On Aug 20, 2021, at 4:31 PM, John Forecast via cctalk > wrote: > > See: > > > > > for more info on multi-processor PDP-11s including KDJ11-B’s. > > John. Nice. Intere

Re: Multiprocessor Qbus PDP-11

> On Aug 19, 2021, at 7:39 PM, Charles Dickman via cctalk > 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 Sl

Re: Multiprocessor Qbus PDP-11

> On Aug 20, 2021, at 4:07 PM, Guy Sotomayor via cctalk > wrote: > > There were a couple of other PDP-11 multiprocessors that I know of (and used): > > * C.MMP (eventually 16 PDP-11/40e's in an SMP configuration with a > crosspoint switch accessing a large memory). It ran a capability >

Re: Multiprocessor Qbus PDP-11

There were a couple of other PDP-11 multiprocessors that I know of (and used): * C.MMP (eventually 16 PDP-11/40e's in an SMP configuration with a crosspoint switch accessing a large memory).  It ran a capability based OS called Hydra. * CM*  this was a cluster of LSI-11s (as I recall) th

Re: Multiprocessor Qbus PDP-11

Charles Dickman 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

Re: Multiprocessor Qbus PDP-11

> On Aug 19, 2021, at 7:39 PM, Charles Dickman via cctalk > 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 S

Multiprocessor Qbus PDP-11

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.