From: Warner Losh <imp@bsdimp.com>
To: Roland <roelof_klaas@yahoo.com>
Cc: "tuhs@minnie.tuhs.org" <tuhs@minnie.tuhs.org>
Subject: Re: [TUHS] Unix for PDP11/20 w/o mmu or paging option
Date: Fri, 17 Sep 2021 08:33:53 -0600 [thread overview]
Message-ID: <CANCZdfoiTcxy9UL2U=-4ADg+=hSE1-Fd9rB2qociZHtLa5rBBA@mail.gmail.com> (raw)
In-Reply-To: <2007825471.713023.1631887763341@mail.yahoo.com>
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On Fri, Sep 17, 2021 at 8:10 AM Roland via TUHS <tuhs@minnie.tuhs.org>
wrote:
> Hello Unix fanatics,
>
> I have a PDP11/20 and I would love to run an early Unix version on it.
> I've been working on the hardware for a while and I'm getting more and more
> of the pieces back online again. The configuration will be two RK05 hard
> disks, TU56H tape, PC11 paper tape reader/puncher and a RX01 floppy drive.
> Unfortunately I don't have a MMU or paging option. But it seems that the
> earliest versions of Unix do not need the extra memory.
>
> Does anyone have RK05 disk images for these early Unix versions? That
> would be a great help. Otherwise it would be great to have some input about
> how to create a bootable Unix pack for this machine.
>
V5 is the earliest Unix we have contemporary images from. We have fragments
from everything else earlier, including files scavenged/recovered from
early DECtapes and some code recovered from kernel listings from a Unix
course that was put together by Bell Labs...
The Unix 1972 project that some TUHS members did. I think it's in the TUHS
distribution archive, but also on github. I think Warren Toomey's repo is
the canonical one https://github.com/DoctorWkt/unix-jun72 but
https://github.com/c3x04/Unix-1st-Edition-jun72 has a couple of newer fixes
for a docker file to contain the simh simulator. I'm unsure what hardware
that's supported, though. The machine file suggests:
rk03/rk11 177400 disk RK
dc11 174000 tty? (not supp?)
tc11/tu56 177340 dec tape DTn (not showing up in simh?)
rf11/rs11 177460 fixed head disk RF
kw11-l 177546 clock CLK
pc11 177550 paper tape PTR/PTP
asr-33 177560 tty? TTI, TTO
which has an RK03, not sure how close that is to an RK05, so some tweaks
may be needed.
Warner
> A bit about the hardware restoring is on the vcfed forum:
> https://www.vcfed.org/forum/forum/genres/dec/78961-rk05-disk-drive-versions
> https://www.vcfed.org/forum/forum/genres/dec/80723-pdp11-20-restoring
>
> Booting RT11 from RK05
> https://youtu.be/k0tiUcRBPQA
> TU56H tape drive back online
> https://youtu.be/_ZJK3QP9gRA
>
> Thanks in advance!
> Roland Huisman
>
>
>
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next prev parent reply other threads:[~2021-09-17 14:34 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <2007825471.713023.1631887763341.ref@mail.yahoo.com>
2021-09-17 14:09 ` Roland via TUHS
2021-09-17 14:33 ` Warner Losh [this message]
2021-09-17 15:32 ` Clem Cole
2021-09-17 16:04 ` Roland via TUHS
2021-09-17 16:14 ` Clem Cole
2021-09-17 16:44 ` Roland via TUHS
2021-09-17 16:13 ` Warner Losh
2021-09-17 16:17 ` Clem Cole
2021-09-17 16:05 ` Roland via TUHS
2021-09-17 15:35 Noel Chiappa
2021-09-17 18:28 ` Phil Budne
2021-09-17 19:43 ` Clem Cole
2021-09-17 19:51 ` Brantley Coile
2021-09-17 20:07 ` Clem Cole
2021-09-17 21:21 ` Phil Budne
2021-09-17 20:18 Noel Chiappa
2021-09-17 20:47 ` Clem Cole
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