On Tuesday, March 25, 2003, at 02:30 AM, der Mouse wrote:
>>> Unless you're willing to live with just the on-board 1M, you will
>>> also want memory boards, which call for CD-interconnect slots.  The
>>> most Q/CD slots I know of occur in the BA123[%], with four, [...]
>
>> There were LSI-11 backplanes with nothing but CD-interconnect slots,
>> 9 slots as I recall.  Qbus on AB, interconnect on CD.
>
> The CD interconnect is standard?  I had been assuming it was something
> MicroVAX-specific.

   Oh yes, absolutely.  Some Qbus peripherals that were clearly designed 
only for use in PDP-11s *require* a backplane with a CD interconnect.  
The RLV11, a two-board RL01/02 controller, comes to mind.  Further, it 
will smoke (literally) if plugged into a Q-Q backplane.  Don't ask me 
how I know this.

           -Dave

--
Dave McGuire             "I've grown hair again, just
St. Petersburg, FL           for the occasion."       -Doc Shipley