DEC QBUS Backplanes
glen.slick at gmail.com
Fri Apr 17 15:05:42 CDT 2020
On Fri, Apr 17, 2020 at 9:52 AM Bill Gunshannon via cctalk
<cctalk at 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
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
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