[TUHS] PDP-7 and Interdata 8/32 Bell System UNIX Installations?

[segaloco via TUHS]

Thanks Ken! I hadn't, even considered the PDP-15. Looks like SimH supports it, that could make for an interesting project...

- Matt G.
On Monday, December 18th, 2023 at 6:12 PM, Ken Thompson <kenbob at gmail.com> wrote:

> the pdp-7 was run on the almost compatible
> pdp-9 and pdp-15 computers.
> i dont think that version of unix ever made
> it out of the research department.
>
> On Mon, Dec 18, 2023 at 5:54 PM segaloco via TUHS <tuhs at tuhs.org> wrote:
>
>> Are there any documented or remembered instances PDP-7 or Interdata 8/32 UNIX being installed on any such machines for use in the Bell System aside from their original hosts? Along similar lines, was the mention of PDP-7 UNIX also supporting the PDP-9 based solely on consistencies in the architecture or did this early version of UNIX actually get bootstrapped on a real PDP-9 at some point?
>>
>> My understanding of the pre-3B-and-VAX landscape of UNIX in the Bell System is predominantly PDP-11 systems, but there was also work in the late 70s regarding 8086 hosts as evidenced in some BSTJ and other publications, and there is the System/370 work (Holmdel?) which I don't know enough about to say whether it technically starts before or after UNIX touches the VAX.
>>
>> Thanks for any info!
>>
>> - Matt G.
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