[TUHS] Fwd: Choice of Unix for 11/03 and 11/23+ Systems

[Henry Bent]

On Fri, 18 Sep 2020 at 23:24, Paul Riley <paul at rileyriot.com> wrote:

>
> Team,
>
> I’ve read thru the FAQ and other sources regarding compatibility of
> Research and other flavours on the PDP-11. I have two physical machines, an
> 11/03 and an 11/23+. I’m choosing which version to use on each machine.
>
> Is LSX the only option on the 11/03, or could I run V6 or Mini-Unix with
> more RAM?
>
> From the FAQ, it says V7 would support 11/23 with kernel recompilation, I
> assume includes 11/23+. I see 2.11BSD would also run on a ‘23 (and + I
> guess) with 1MB or more of RAM, so that would be preferred. I suppose 2.11
> would be preferable.
>
> I also have found another 11/23+ system from a seller here in China.
> There’s the system, and a VT100, and a hard drive I can’t identify. Here’s
> a photo, does anyone know what it is? I may bid for it...
>
> Paul
>
> *Paul Riley*
>

Ultrix 3.1 should support the 11/23+, which would give you memory support
up to 4MB as well as support for TCP/IP if you have a DEQNA.  I don't think
2.11BSD will run on anything without split I/D which the 23 does not have.

Without a closer view of the label I doubt that anyone could give you a
definite identification of that hard drive.

-Henry
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