18 Sep
2021
18 Sep
'21
12:28 a.m.
The earliest Unix running on the 11/20 requires not only the custom
MMU, but also a fixed-head disk (the genesis of the tiny root
partition?), so I agree with Noel that MINI-UNIX and LSX, while not
"historically correct" for your hardware are a good fit, and that
building a working system on simulated hardware would likely be the
easiest route.
Phil