From: Clem Cole <clemc@ccc.com>
To: Roland <roelof_klaas@yahoo.com>, TUHS main list <tuhs@minnie.tuhs.org>
Subject: Re: [TUHS] Unix for PDP11/20 w/o mmu or paging option
Date: Fri, 17 Sep 2021 12:14:54 -0400 [thread overview]
Message-ID: <CAC20D2OCXQzR4xByTFLpF5X=DekLX5mg-Q7gRwLKsNfo667Szw@mail.gmail.com> (raw)
In-Reply-To: <1359803079.736350.1631894652157@mail.yahoo.com>
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On Fri, Sep 17, 2021 at 12:04 PM Roland via TUHS <tuhs@minnie.tuhs.org>
wrote:
>
> There is a KT11B paging option that makes the PDP11/20 a 18 bit machine.
> It looks a bit like the TC11 DECtape controller. I've got the schematics
> from the internet. But I have no idea how it compares to the later MMU
> units from the software perspective.
>
Love to see them and if you know where you found them.
> The V1 work was for a PDP-7 and is before the first 11/20 was secured.
> The point is that I think there is a hole in the the SW we have.
>
I just looked again at what Warren has -- it is the 11/20 assembler code
that Dennis scanned. I have forgotten that we still had that. I wonder
if it had the KS-11 stuff in it. I'll have to peek
ᐧ
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next prev parent reply other threads:[~2021-09-17 16:15 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
2021-09-17 15:32 ` Clem Cole
2021-09-17 16:04 ` Roland via TUHS
2021-09-17 16:14 ` Clem Cole [this message]
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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