> QBUS termination is a complex subject; when you have multiple backplane > sections, connected by cables, each section has 'termination'. That's what this > REV11-E card is; it's also the QBUS 'out' to the card in the 780 CPU which the > console -11 uses to control the /780 CPU. Why it's in the middle slot, I'm not > sure (unless things have been moved around)? >
Pretty sure they have been moved.. > > M8044ee > > m7946 > > MSV11-?? (My list doesn't contain an '-EE', but it's some sort of small MOS > memory, Q18) > RXV11 (RX01 8" floppy disk controller) > > In theory, the M8044-EE should be an "MSV11-DE" (not "MSV11-EE", that would > be an M8045-EE), but none of my documentation, including the M8044 prints, > covers such a variant. Maybe I need to look in the /780 prints, it may be a > special variant for use in the /780 console machines. > The back of the board says M8045 5013128DP1 32K 18bit MOS memory > > M8192 > > LSI-11/73 CPU; a nice machine, if you can eventually get it running. You'll want > a bunch more memory (note that the M8044/8045 cards are Q18, and so you > can only have up to 256KB with them - they _WILL NOT WORK_ in a system > with more than 256KB in it). > > The REV-11 isn't needed in this configuration. The boot PROM for this machine > was actually on the card in the /780 CPU, so eventually you'll need a > replacement - something like a BDV11 or something (they are available, and > not too expensive). > These all seem to have vanished from E-Bay at present. > Noel