PDP-11/34A bring up
pete at dunnington.plus.com
Mon Nov 8 17:17:17 CST 2010
Ethan Dicks wrote:
>> Did the transition (which I'm sure has a more proper DEC name) originally
>> come with the RL01/02? The RL11 or equiv controller? or with the rack?
> I _think_ it was part of the cab kit with the controller.
All the ones I've seen were supplied that way, as part of the controller
> The arrangements I know of are...
> RL8A - round cable with a ZIF end for the drive and a 2x20 "Berg" end
> for the controller
BC80J, described as 13 twisted pairs.
> RLV11/RLV12 - round cable with ZIF end for the drive and a 2x20 Berg
> end for the controller, but a different DEC P/N than the RL8A cable
> (not positive and if true, don't remember why it's different).
BC80M/KG. It's listed as 13 twisted pairs shielded. Was the BC80J not
That was used for 11/23-Plus systems with an RLV12 and dual RL02s, but
all the RLV11s and some RLV12s I've seen in the UK had the same
arrangement you described for the RL11 - flat cable from controller to
rack bracket, round grey cables with ZIFs on both ends from rack bracket
to drive, and drive to drive. Most of the QBus RL-based systems I've
seen were complete 11T23 or 11T03 systems in a cabinet with two RL01 or
two RL02 and a CPU box. The 11T23 manual says "A BC06R 40-conductor
ribbon cable connects to J1 on the disk control module. The other end
of this cable connects to a transition bracket on a mounting bar located
above the PDP-11/23."
Sadly it gives the part numbers for the I/O cables (BC20J, aka
70-12122-10) and the terminator (70-12293) but not the transition
connector. And guess which page of my IPB fiche is missing :-(
Pete Peter Turnbull
University of York
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