"Gooijen, Henk" wrote: > >Nope, RX02 uses NPR, thus CA1-CB1 must be cut. >RX01 did not use NPR, it was programmed I/O. Nt sure if RX01 has the >CA1-CB1 jumpered on-board ... there are a few (old) UNIBUS modules >that do *not* have a jumper on those two contacts! ah, that's it. I have an RX01 controller. oops. sorry. (donation accepted! :-) -brad