On 4/17/20 4:05 PM, Glen Slick via cctalk wrote:
On Fri, Apr 17, 2020 at 9:52 AM Bill Gunshannon via cctalk
<cctalk@classiccmp.org> wrote:
I have been sorting thru a bunch of stuff in an effort to
clean the place up (Aren't we all doing that now with all
this time on our hands?) I found a backplane. It says
Digital on it but does not have an H- number. I also
don;t find it listed in any of the lists I can find on
the web.
It has 8 A-B slots and 4 C-D slots. the Four C-D are on
the bottom half of the backplane. I am assuming it is
18 bit and the C-D were intended for things like the 2
board RL controller.
Anybody familiar with this and able to identify it?
Anybody interested in it? It should fit in a USPS
Medium Flat Rate Box.
Sounds similar to a BA123 backplane which has 4 Q22/CD slots and 8
Q22/Q22 slots.
But the BA123 is rather distinctive with a gap then a 13th slot where
the M9058 Signal Distribution Board for the M7555 RQDX3 is installed.
For example BA123 backplane part number 54-17507-01 / 50-17506-01
https://www.ebay.com/itm/DEC-QBUS-BACKPLANE-BA123-DEC-54-17507-01-PDP-11-MICROVAX/263251797600
https://i.ebayimg.com/images/g/LygAAOSwrP9Z2V7z/s-l1600.jpg
Definitely not that. Very small. Just big enough for the
slots I mentioned above. Power strip on one edge and berg
pins for control on the other.
bill
