On Mon, Jul 20, 2020 at 10:46 AM Will Senn <will.senn(a)gmail.com> wrote: You should look at the canonical tuhs archive at https://www.tuhs.org/Archive/Distributions/UCB/2.11BSD/ 1. Is it really pl 431? Yes. It is. > 2. How can I tell? VERSION is always updated, so it is. If you are in doubt, you can look at the patch files that's at https://www.tuhs.org/Archive/Distributions/UCB/2.11BSD/Patches/ and they all update VERSION. > 3. Is it the latest tape image available (I've seen plenty of disk images, > but those are already installed)? Yes. Well, almost. https://www.tuhs.org/Archive/Distributions/UCB/2.11BSD_patch457/ has a tape that's updated to 457, lacking only the last 12 changes. A most current tape hasn't been regenerated, at least in the archives. A quick search of github shows there's a few PiDP-11 oriented versions but I've not looked closely at them. > 4. Is there a howto bring it up to the next patch level document lying > around somewhere? There's two or three efforts to create shell scripts to apply the patches. I've not looked closely at them all yet... > I've seen Warner's work on going the other direction and that's > fascinating in it's own right, but I'd like to see about patching up to > latest When my work is done, there will be a github repo that has all the changes applied, one at a time which can be used to generate context diffs or something else that can be pushed to the PDP-11s that can be updated. Warner