Here's something interesting.
Here we have an 11/73 with a KDJ11-BB processor, and, two MSV11-JE (2MB, PMI) memories.
When I boot my 11/73 in dialog mode (or, if I interrupt the boot with a Ctrl-C and run 'Test'), I get an Error 47 - Memory CSR Error. In fact, one of the MSV11-JE boards has...