unix developed on 11/20 with 20 on panel or machine that just said pdp/11?

[Warren Toomey]

Steve Malikoff wrote:
> It states that their 11/20 had a KS-11 memory management unit, was that
> mandatory for running v1 Unix on an 11/20?

I case-insensitively grepped for 'ks.*11' in the Github repository here:
https://github.com/DoctorWkt/unix-jun72
and I didn't see a mention.

> The 1971 Unix Programmer's Manual mentions their
> 11/20 had 24 KB (surely KW?) memory rather than 28KW.

28KB is right. The simh.cfg from the repo says:

set cpu 11/20
set cpu 32K

Cheers, Warren