The Last of The Line

[Johnny Billquist]

"Glen Slick" <glen.slick at gmail.com> skrev:

 > On 5/17/07, Rod Smallwood <RodSmallwood at mail.ediconsulting.co.uk> wrote:
 >> > OK we have a change
 >> >
 >>> > >PMI memory goes in slots 1 and 2, CPU goes in 3
 >>> > >joe lang
 >> >
 >> > Rod
 >> >
 >
 > From my understanding of this after looking at various manuals this is
 > true for an 11/73 or 11/83 with an H9872 backplane in a BA23 box, but
 > not for an 11/84.

Correct. So if people could stop assuming that an 11/84 have a q-bus, we 
would get a long way towards clearing this up.
If people don't know about the 11/84 or 11/94, don't write answers based 
on your knowledge of the q-bus based KDJ11 setups.

 > Figure 8-6 in EK-PDP94-MG-001_Sep90.pdf shows a PDP-11/84-A backplane
 > with the MDM M7677 in the MDM slot, the KDJ11-BF M8190 in slot 1, a
 > MSV11-JB/JC M8637-BA/CA in slot 2, and a MLM load module M7556 in slot
 > 3.  Not clear to me if the MLM in this case could be replaced by a
 > second MSV11-J.

Yes. The MLM isn't really neccesary if you have one memory card in there 
either, if I remember right. But if you have two memory cards, you don't 
have any space left for the load module anyhow.

 > The 11/94 backplane shown in figure 1-2 in EK-PDP94-MG-001_Sep90.pdf
 > shows a KDJ11-E M8981 in slot 1, an APS module M7914 in slot 2, and
 > slot 3 empty.  Does anyone know for certain that this backplane it
 > compatible with MSV11-J modules, and if so in which slots they would
 > go?

It's the same backplane. I have an 11/94 box here with an 11/84 cpu and 
memory. Works just fine.
Just wish I could land an 11/9x cpu as well. :-)

	Johnny

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol