> > > > > I am not 1/2 as knowledgeable as others here, but what comes to mind is > "backplane change",
You mean that I have to do modifications to the backplane. No, that is not what I want... > I think you'd leave the M930 where it is and on the 2nd > backplane segment install the M9301. If you don't have a 2nd plane I'd say > you may not be able to use this. Just my GUESS, but I am interested to > learn the correct answer. > The PDP-11/05S I got had a M9301 in it when it arrived and it was installed in a M930 slot (slot 3 AB). So that might be an indication that it could work. But that is a different backplane. If one read notes in the PDP-11/04 printset it says: Do not insert a M930 or M9302 in a MUD slot. Only in the Unibus slots or you will have short circuit. On the other hand it does not say that the M9301 (or M9312) cannot be installed in a unibus slot. It recommends that those boards go into MUD slots. But electrically I cannot see that it shouldn't work. Especially if you jumper W1 - W5. > b > -- > @ BillDeg: > Web: vintagecomputer.net > Twitter: @billdeg <https://twitter.com/billdeg> > Youtube: @billdeg <https://www.youtube.com/user/billdeg> > Unauthorized Bio <http://www.vintagecomputer.net/readme.cfm> >