Re: [TUHS] Will pdp 11/04 run unix?

[Clem Cole <clemc@ccc.com>]

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s/note the data/note the date/  <-- dyslexic typing -- sigh.

On Thu, Jul 30, 2020 at 9:53 AM Clem Cole <clemc@ccc.com> 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 <will.senn@gmail.com> 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
>>
>>

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