pdp11/84 PMI memory: What is the problem with Q bus?

[Noel Chiappa]

    > From: Jerry Weiss

    > uNOTE # 028 indicates that MSV-11 JB/JC (M8637-B/C) doesn't do block
    > mode.

I went and looked at uNOTE #28, after I found it (it's not in the initial set
of uNOTEs, but in the second set - the so-called 'OEM uNOTEs"; note that the
numbers were re-used between the two sets, so there are _two different_ uNOTE
#28's).

I couldn't find anything there about the JB/JC not doing block mode? All it
says is they "can not be used in a Q-BUS system due to gate array
incompatibilities".

	Noel