On Thu, Jul 30, 2020 at 7:49 AM Noel Chiappa wrote: > - If you get the V1 that ran on an -11/20 (which is mostly compatible with > the /04 and /05), it should run on an /04. (Not sure what you'd use for > mass > storage, on a physical /04, though.) I'm not sure when they dropped the > /20 - > I think V4 n(at the latest)? But V2 and V3 are lost. > Yes, the reconstructed 1st edition may run (though from dates and such, it's somewhere between 1st and 2nd edition), though I've no direct experience with 11/04 hardware, nor ideas on how to bootstrap it onto appropriate physical media... I have it in my head that the 4th edition was rewritten for the 11/45 and removed support for 11/20. I thought I knew why, but could only find part of the story in the manuals... There's a strong note in the 4th edition preface that it applies only to the 'c' version of Unix and the 3rd edition preface has a note saying the manual doesn't apply to the 11/20 version and to look in the 2nd or even 1st edition manuals for that. As others have mentioned, Mini-unix and/or LSX might have a shot, but it might be best characterized as a long shot. Warner