On Wed, Jun 22, 2022 at 8:06 AM Noel Chiappa <jnc(a)mercury.lcs.mit.edu> wrote:
[c] Fifth Edition UNIX PDP-11/40 June
[d] Sixth Edition UNIX PDP-11/45 May 1975
[e] Seventh Edition UNIX PDP-11/70 January 1979
This table gives an erroneous impression of which versions supported which
PDP-11 models. 4th Edition supported only the /45; 5th Edition added support
for the /40; and the /70 appeared in 6th edition.
I believe that's actually a menu, and that selecting from it will connect you to
an (emulated) machine of the given type running that version of the OS.
Stephen Jones and LCM+L set that up for the Unix 50th anniversary.
- Dan C.