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* Re: [TUHS] Will pdp 11/04 run unix?
@ 2020-07-30 21:37 Noel Chiappa
  2020-07-31  7:10 ` Angelo Papenhoff
  0 siblings, 1 reply; 11+ messages in thread
From: Noel Chiappa @ 2020-07-30 21:37 UTC (permalink / raw)
  To: tuhs; +Cc: jnc

    > From: Angelo Papenhoff

    > I believe 11/20 UNIX also needs the EAE.

Some applications might have used it (the story about the KS11 bug with the
KW11-A confirms they did use it on that machine), but I found no trace of use
of it in a quick scan of the entire Version 1 source (the one which is
extant).

Also, the first file in the OS source:

  https://www.tuhs.org/cgi-bin/utree.pl?file=V1/u0.s

lists the addresses of all device registers, and the KE11-A isn't there.

If the KE11 is needed to run some application on the -11/04, there are
KE11-B's (program compatible, but a single hex card) available, ISTR.  For
emulation, something (SIMH?) supports it, since the TV -11 on ITS (now running
in emulation,I'm pretty sure) uses it.

	 Noel

^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [TUHS] Will pdp 11/04 run unix?
@ 2020-07-30 17:20 Noel Chiappa
  0 siblings, 0 replies; 11+ messages in thread
From: Noel Chiappa @ 2020-07-30 17:20 UTC (permalink / raw)
  To: tuhs; +Cc: jnc

    > From: Clem Cole

    > And if you could find a KS-11 MMU that Ken and Dennis had for the 11/20
    > ... we can't even find documentation about it (Ken's surviving code is
    > the best doc we have).

Where is that code? The Version 1 at TUHS appears to pre-date it.

It would be great to have a look at it, we might be able to partially document
the KS11 using it. (Ken had only vague memories of the KS11.)


    > From: Ronald Natalie

    > There's always MiniUnix.

Ah; I didn't realize that was something different from LSX (the LSI-11
system).

	Noel

^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [TUHS] Will pdp 11/04 run unix?
@ 2020-07-30 13:47 Noel Chiappa
  2020-07-30 14:08 ` Ronald Natalie
                   ` (2 more replies)
  0 siblings, 3 replies; 11+ messages in thread
From: Noel Chiappa @ 2020-07-30 13:47 UTC (permalink / raw)
  To: tuhs; +Cc: jnc

    > From: Will Senn

    > can I run Unix on a PDP 11/04? 

No, it doesn't have memory management, so not any of the well-known 'stock'
versions (V5/V6/etc).
Two choices, though:

- If you get the V1 that ran on an -11/20 (which is mostly compatible with
the /04 and /05), it should run on an /04. (Not sure what you'd use for mass
storage, on a physical /04, though.) I'm not sure when they dropped the /20 -
I think V4 n(at the latest)? But V2 and V3 are lost.

- There's a 'Unix' for the LSI-11, and with minor changes (the LSI-11 isn't
100% compatible with other MMU-less 11's, but the changes are minor, e.g.
MOS, written in MACRO-11, was conditionalized to run on both the LSI-11
and the -11/20) it should run on an /04.

	Noel

^ permalink raw reply	[flat|nested] 11+ messages in thread
* [TUHS] Will pdp 11/04 run unix?
@ 2020-07-30 13:16 Will Senn
  2020-07-30 13:53 ` Clem Cole
  0 siblings, 1 reply; 11+ messages in thread
From: Will Senn @ 2020-07-30 13:16 UTC (permalink / raw)
  To: TUHS main list

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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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^ permalink raw reply	[flat|nested] 11+ messages in thread

end of thread, other threads:[~2020-07-31  7:11 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-07-30 21:37 [TUHS] Will pdp 11/04 run unix? Noel Chiappa
2020-07-31  7:10 ` Angelo Papenhoff
  -- strict thread matches above, loose matches on Subject: below --
2020-07-30 17:20 Noel Chiappa
2020-07-30 13:47 Noel Chiappa
2020-07-30 14:08 ` Ronald Natalie
2020-07-30 16:13 ` Warner Losh
2020-07-30 18:00   ` Heinz Lycklama
2020-07-30 18:55 ` Angelo Papenhoff
2020-07-30 13:16 Will Senn
2020-07-30 13:53 ` Clem Cole
2020-07-30 14:01   ` Clem Cole

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