> On 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? > >
Micronote 5 does not list the LSI 11/2 or 11/03 processors as being compatible with Q22. See section II oin http://decvax.50megs.com/doc/uNotes/micronote5.html <http://decvax.50megs.com/doc/uNotes/micronote5.html> for the details. The upgrades to Q22 were commonly done with wire-wrap. You could unwrap the modification.
