3 Aug
2011
3 Aug
'11
1:09 p.m.
When I actually *looked* at the BC11 cable, it appears one end of the
cable uses a M919 card and the other end is a M929 card. It appears
that the cable is straight-through, except for those lines which are
disconnected or tied to a sibling pin.
That sounds right. There are several ground pins that might well be tied
together in the cable. The Unibus cable does not carry power lines (just
signals and grounds). but there is a +5V power pin on a Unibus Out
connector, to power the terminator. That pin is not connected in the
cable. Apart from that, the pinout is the same at both ends.
-tony