19 May
2007
19 May
'07
5:20 p.m.
"Rod Smallwood" <RodSmallwood at mail.ediconsulting.co.uk> skrev:
Easy. By listening to me. :-)
I have an 11/94 box, with an 11/84 CPU and PMI memory in it here, and
running.
It's the same backplanes, and the same Unibus map.
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
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?
We seem to have come down to one fudamental question.
That is to say whats the differnce between the backplane in an 11/84 and
that in an 11/94?
I can confirm the actual systems were as stated above ie
KDJ11-E M8981 in slot 1
APS module M7914 in slot 2
Nothing in slot 3
So how can we tell if the first three slots in each type are compatible? 
20 May
20 May
5:42 p.m.
On 19/05/2007 18:20, Johnny Billquist wrote:
I've seen the 11/84 backplane referred to in one of the 11/84 technical
manuals as an H9277A, and I've seen the 11/94 backplane referred to as
H9277B, so there's apparently some difference but it must be trivial
(maybe just a change of manufacturing location), else DEC would have
changed the number rather than the suffix. What's more, DEC had
official upgrade kits from 11/84 to 11/94 and there was never any
suggestion of changing the backplane, or the KTJ11, or anything like
that, only moving cables and swapping CPUs and memory. The process is
described in detail in the 11/94 User Guide, which is on bitsavers if
you want to look.
--
Pete Peter Turnbull
Network Manager
University of York
"Rod Smallwood" <RodSmallwood at
mail.ediconsulting.co.uk> skrev:
So how can we
tell if the first three slots in each type are compatible?
Easy. By listening to me. :-)
I have an 11/94 box, with an 11/84 CPU and PMI memory in it here, and
running.
It's the same backplanes, and the same Unibus map.
6444
days inactive
6445
days old
1 comments
2 participants
participants (2)
-
bqt＠softjar.se -
pete＠dunnington.plus.com