MSV11-R doc needed

Noel Chiappa jnc at
Wed May 6 18:59:41 CDT 2020

    > From: Chris Zach


I don't know what that is, but it's not an MSV11-R. Here:

is an MSV11-R.

    > Maybe it's PMI memory without ECC? I count 18 bits across which seems 
    > like the MSV11-Q parity memory.

Alas, there is almost zilch original DEC documentation extant which speaks of
it; not even uNote #28:

which briefly covers all the other late DEC QBUS memories (including the
MSV11-M, which ia otherwise _completely_ un-documented) mentions it.

But I agree that given the 18 chips, it'a probably parity.


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