qbus module ID

From: Lyle Bickley <lbickley_at_bickleywest.com>
Date: Thu Feb 3 18:06:32 2005

I think Al has that manual (MSV1J) on bitsavers. If not, I've got one
(EK-MSV1J-UG_001_May85.pdf) and I can email it to you privately if it's not
on bitsavers. I use them in my 11/83.


On Thursday 03 February 2005 14:44, Eric Smith wrote:
> Pete wrote:
> > I have here a M8637 memory module, no additional info on the board to
> > identify which variant, I would be expecting CA or EA, as down one
> > side is printed "QBUS 2MB MOS MEMORY".
> > Any hints on how to work out which it is?
> If it's half-populated, it's a -Bx or -Dx. If it's fully populated,
> it's a -Cx or -Ex. The second letter of the suffix varies depending on
> the manufacturer of the RAM chips. The first character of the module
> suffix is the same as the second character of the MSV11-Jx option part
> number.
> Unfortunately I don't know how to tell the -Bx/-Cx modules, which are
> for use only in the PDP-11/84, from the -Dx/-Ex modules, which can be
> used in the 11/84 or in QBUS/PMI systems. The information needed to
> determine this is probably in the EK-MSV1J-UG user's guide or the
> MP02056 maintenance print set, but I don't have either.
> Eric

Lyle Bickley
Bickley Consulting West Inc.
"Black holes are where God is dividing by zero"
Received on Thu Feb 03 2005 - 18:06:32 GMT

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