Multiprocessor Qbus PDP-11
paulkoning at comcast.net
Fri Aug 20 15:14:49 CDT 2021
> On Aug 20, 2021, at 4:07 PM, Guy Sotomayor via cctalk <cctalk at classiccmp.org> 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
> based OS called Hydra.
> * CM* this was a cluster of LSI-11s (as I recall) that were
> hierachially interconnected to allow for distributed operation (I
> think it was potentially capable of running with 255 nodes). I don't
> recall what OS CM* used.
> Of course both of the above did not use off the shelf OS's or software.
> TTFN - Guy
Did you ever run across an ALGOL-68 compiler for either of these? At one time (while at the U of Illinois I think, late 1970s, or perhaps a few years later at DEC) I had a set of DECtapes that contained the run time libraries for that compiler. I think they were in Bliss, and PDP-10 format DECtapes. I lost them at some point, unfortunately, and I never had the compiler itself.
Some vague memory says it was an ALGOL-68 subset; most compilers were, ALGOL-68 is a rather difficult language to compile if you want to support the whole thing.
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