I made a little table of the signals in A & B side
and I can't get them
to line up with those
on the exerciser. I must be missing something. All the other functions
of the exerciser
make sense, as does the internal writing. It's just the "bus" wiring
which seems missing.
Understanding that I know nothing about DEC gear, I do believe that the
exerciser is a passthrough device which disconnects only the signals needed
to exercise the RK05. Maybe this is the missing point.