PDP11/83 qbus layout.
Jorgen Pehrson
jp at spektr.ludvika.se
Thu Dec 24 08:11:01 AEST 1998
(Sorry for the rather lenghty post)
Hi,
I'd just try to boot my newly aquired PDP11/83 and was planning to install
2.11BSD. But I've run into one (small?) problem. If I just try to boot
from DU0: it says:
Trying DU0
Error 20
Controller Error
And if I boot the install tape from the TK70 drive and run disklabel,
all accesses to the RD53 drive just times out. So I was going to remove
all unwanted QBus boards from the boxes. And that's what I was going to
ask...
Is there something special I have to think about, like there's some slots
that can't be used, some boards must be in a specific slot and so on?
This is the current layout (which is exactly as it was when it was taken
offline, or so I think)
11/83 (173QA-B3, I think this is a normal BA23 enclosure):
(As seen from the back) Also contains one TK70 drive.
____________________________________________
|Dataram 40903 revG | Empty slot | (2mb ram)
---------------------------------------------
| M8637-EH | (2mb ram)
---------------------------------------------
| M8190-AE | (83 CPU)
---------------------------------------------
| M7559 | M7504 | (TK70, DEQNA)
---------------------------------------------
| M8020 | Empty slot | (console?)
---------------------------------------------
| M7957 | (DZV11)
---------------------------------------------
| m3104 | (DHV11)
---------------------------------------------
| M9404 | Empty slot | (1st Qbus conn)
---------------------------------------------
Expansion box (173QA-B3)
(From the back) Also contains one RD53 and one dual floppy.
_____________________________________________
|M9405-YA | Empty slot | (2nd qbus conn)
---------------------------------------------
| m3104 | (DHV11)
---------------------------------------------
| m9047 | m9047 | (grant cont x2)
---------------------------------------------
| m7555 | Empty slot | (RQDX3)
---------------------------------------------
| m7512 | Empty slot | (RQDX1E)
---------------------------------------------
Plus one external disk box with two RD53 drive. (This system only uses one
drive though.)
Now, what I obviously want to keep is:
the two RAM boards, the CPU, the console board, tk70 controller, deqna,
rqdx3.
What I want to loose:
the rest of the serial boards, the rqdx1e board and the floppy drive.
What do I have to do to make this work? I would preferrably want to fit
all those boards in the main CPU enclosure box. Do I have to re-assign any
addresses (or vectors, or what the correct PDP-speak is). Are there any
slots in the enclosure that are a no-no for the dual-sized boards?
Thanks for any input!!
Jorgen Pehrson HP 9000/380 (NetBSD/hp300 1.3)
jp at spektr.ludvika.se DECstation 5000/200 (NetBSD/pmax 1.3)
http://spektr.ludvika.se/museum PDP11/83 (2.11BSD) VAX2000 (NetBSD/vax)
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