s/note the data/note the date/ <-- dyslexic typing -- sigh. On Thu, Jul 30, 2020 at 9:53 AM Clem Cole wrote: > PDP 11/04, like 11/03,11/05, 11/15, 11/20 lacks an MMU. So the > traditional releases from Research, USG, UCB will not boot. > That said, V1 which ran without it might work with some tweeking as they > did not yet have one. And if you could find a KS-11 MMU that Ken and > Dennis had for the 11/20 (which was designed by DEC CSS), theoretically > next versions could be made to run. The problem is that while many of us > have looked a: we can not find a KS-11 in real life (CSS did make that > many), b: we can't even find documentation about it (Ken's surviving code > is the best doc we have). > > FYI: go to bitsavers and download a copy of the PDP-11 Processor > Handbook, but note the data. You probably will want (at least) both > an early and a later one, as the later ones often dropped details about > some of the models that were not being manufactured. For instance, I have > a couple of different ones, and the '78 version really one talks about > 04/34/45/55/60 - the previous processors like 03/15/40 are not included. > So you need an early 70's version to include them, and later versions for > the 44/90 etc. > > BTW: Page 4 of same, have a graphic showing the HW requirements for the > DEC OS's. On the X-axis is the OS, the Y axis the model. RT-11, MUMPS-11, > RSX-11M, RS-11S are the only OS's that were supported for the 04. > > Here is a hint, if the processor could not support RSTS, it is unlikely it > could support UNIX. > > > > On Thu, Jul 30, 2020 at 9:17 AM Will Senn wrote: > >> The question is can I run Unix on a PDP 11/04? I've dug around and it's >> unclear to me, so I'm asking y'all. >> >> Will >> >> -- >> GPG Fingerprint: 68F4 B3BD 1730 555A 4462 7D45 3EAA 5B6D A982 BAAF >> >>