Question about DEC PMI Processors & Gear Acquisition

29 Dec 2012

...
   That's
basically the crux of my question. I don't really need/want
 PMI memory, as the backplane I have doesn't support PMI as it's all
 Q22 ABAB.  Does that follow?  PMI is a non-bus (private!) ribbon cable jumper
 from CPU to RAM. 
I'm fairly sure it does, fairly sure that PMI memory depends on having
non-Qbus connections on the C-D half of its slot.  There are two major
reasons I think this: (1) I've seen it documented that way and never
seen the contrary claimed, and (2) I can't imagine why DEC (of that
era) would have built backplanes with two kinds of slots, with all the
potential for error that entails, if there were no need for it.

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Question about DEC PMI Processors & Gear Acquisition