uVax II questions

<> MVII memory use PMI AND CD slots and the CD slots are not bussed for Q. < <Yes, but the CD slots *are* bussed together. True, the B side of the first goes to the A side of the next. It's not a continious bussing. So if there is a gap the memory chain is broken. <I still can't find a single signal between the KA630 CPU board and the <pair of MS630 memory boards that is not bussed straight through between al <three cards. Other than the bus grant on the A/B Qbus connectors, which <AFAIK doesn't enter into memory addressing in any way. The A/B bus is insignificant for PMI memory. also the singnaling scheme is one of terminated signals with open collecotr drives so a lot isn't apparent on inspection. DEC books I ahve don't explain it either. I do have several working uVAXIIs though. Allison