Looking for....RL02 controller for PDP-8E M8433?

--- Patrick Finnegan <pat(a)purdueriots.com> wrote: I don't know. In this particular thread what I mean by "custom cable" is that one end of a 1/2" diameter cable with many twisted pairs has an RL01/RL02 end, the other has a 40-pin Berg connector with no obviously visible pattern to it. The RL11 and RLV11 use a flat ribbon cable and a transition bracket. It's obvious from simple inspection which pins go where. The RL8A and RLV12 cables that I have seen have different part numbers. I would quote chapter and verse, but I do not know which box mine are in to lay hands on them. :-( Hmm... I have never seen anyone do that, but in theory, if you have the signals lined up, it should work. Do you have the docs for the RLV12 and the RL02 to verify what signals go where? There's a *possibility* you have a simple mirror-image problem. I have seen that sort of thing crop up with flat cables and odd arrangements before - think of the issues with DEC SDI drives and cables - odd numbers of cables between the drive and controller don't work - you need those transition brackets and a pair of cables in-between to flip and reflip the signals around. DEC stuff is designed not to smoke (in 99.995% of cases) when you plug something in backwards. It shouldn't take verifying more than a handful of signals to establish if your current cabling does the right thing or not. -ethan