I have the DEC cards, but I think that box had a 4 x 4 backplane and came with 16 bit addressing (M7264) and could be upgraded to 18. I'm out of town so I can't really check. You might need a BA11-N, S, or BA23 box to support the Emulex controller.
The Q-bus backplanes can be confusing and I don't trust my memory on them. Paul On Tue, Aug 29, 2017 at 9:52 PM, Douglas Taylor via cctalk < cctalk@classiccmp.org> wrote: > I have a BA11-M box with a backplane that I am sure has been upgraded to > be 22 bit addressing. > > When I got this box it had an 11/23 Dual width Cpu, MXV11-AC with custom > boot ROMs and a 256KB MSV11-P memory board. The memory in the MXV11 had > been disabled so I suspect the backplane was upgraded to 22 bit. > > What I want to do is put a LSI 11/2 (M7270) and/or LSI 11/03 (M7264) into > this box and construct a minimal, basic PDP11. This system would have 64kb > of memory, some kind of serial interface and an Emulex UC07 running a SCSI > disk or SCSI2SD adapter. The OS would be RT11 V5.3. > > Can I operate these Cpu's in a 22 bit backplane? > > If so, does anyone have spare MSV11-DD 64kb memory and DLV11 type serial > cards for sale/trade? > > >
