[TUHS] Will pdp 11/04 run unix?

[Warner Losh]

On Thu, Jul 30, 2020 at 7:49 AM Noel Chiappa <jnc at mercury.lcs.mit.edu>
wrote:

> - 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.
>

Yes, the reconstructed 1st edition may run (though from dates and such,
it's somewhere between 1st and 2nd edition), though I've no direct
experience with 11/04 hardware, nor ideas on how to bootstrap it onto
appropriate physical media...

I have it in my head that the 4th edition was rewritten for the 11/45 and
removed support for 11/20. I thought I knew why, but could only find part
of the story in the manuals...

There's a strong note in the 4th edition preface that it applies only to
the 'c' version of Unix and the 3rd edition preface has a note saying the
manual doesn't apply to the 11/20 version and to look in the 2nd or even
1st edition manuals for that.

As others have mentioned, Mini-unix and/or LSX might have a shot, but it
might be best characterized as a long shot.

Warner
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