On Tuesday, March 25, 2003, at 02:11 AM, Carl Lowenstein wrote:
> There were LSI-11 backplanes with nothing but CD-interconnect slots,
> 9 slots as I recall.  Qbus on AB, interconnect on CD.
> 11/23 systems came that way at one time.
>
> They might not have been wired for 22-bit addressing on the Qbus,
> but that is easy to fix.

   The BA11-SA is the one to use for this...it's wired for 22-bit 
addressing and has a beefy power supply for "serious" boards.

   Other 5.25" Qbus BA11 chassis have 22-bit backplanes but the -SA 
variant is the only one with the studly power supply if memory serves.

      -Dave

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