I found this plea in comp.sys.dec, he seems to have had no response, so I
thought I'd throw it in for the experts here. If anyone can help him,
please contact
this guy direct.
Quote:
I acquired a PDP11/04 last week. It's my first UNIBUS -11, so I don't
really know how to get it working again...
The machine is in a BA-11KA drawer (rev m, eco 0015; the whole machine
was labeled "LANDIS & GYR VISIONIX 4000). It has two DD-11DK system
units (only the first is used), with the following cards in it:
M7263, 2 x M7856, 32K core, M9312, M7262, M9302, G727A. I know what these
cards are, my problem is that I don't know this backplane enough, and I
don't know what to expect from the system. After I
got the machine, I cleaned it, examined the cards for anything strange -
haven't found anything. Then I put back the cards, in the order they were
originally (there were stickers on the side of the chassis showing the
modules' places). One of the DL11W's is configured as the console (at the
proper address; also at 110 baud, 5 data bits, odd parity, 2 stop bits,
active current lopp Rx, passive Tx), it has a BC05C-25 cable leading
out of the chassis. I checked with a multimeter (I haven't got a scope,
and even if I'd have, I'm not familiar with it), there's _something_
on the DB25F connector. Right now I have two choices: to get the DL11W
working with an EIA-interfaced CRT terminal) to see if the CPU is working,
or check this some different way (without a scope that is; am I beeing
impatient?:) The machine has the simple "frontpanel": OFF/ON/STDBY,
RUN/HALT, BOOT/INIT switches, RUN and DCOK LED.
So my questions:
1. what are the settings for a EIA console on a DL11W? I've tried to set
9600, 8N1 according the manuals, but I don't know what to do next, about
the current loop interface, about the cable (nullmodem? straight? with
modem control?), as I still have nothing on the VT (and I know that this
could be my fault...)
2. How do I know if the CPU is really running? (the DCOK LED is on, and if
I switch "RUN", the RUN LED lights up, but does this really reflects the
state of the CPU and the bus? There's the RL controller on the bus, when
the drives are connected to it, and are switched on, the RL01's "FAULT"
light turn off (I was told the drives need timing signals from the
controller; they get it as I interpret this behaviour), but that's about
everything I know from the cards in the chassis. Is there a safe method to
see if the bus is okay, like pulling out cards and/or moving them around?
I don't want to mess something up with all these modified/SPC slots...
Thanks for your time!
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End Quote.
Geoff Roberts
Computer Systems Manager
Saint Marks College
Port Pirie South Australia.
My ICQ# is 1970476
Ph. 61-411-623-978 (Mobile)
61-8-8633-0619 (Home)
61-8-8633-8834 (Work-Direct)
61-8-8633-0104 (Fax)
Received on Fri Dec 11 1998 - 21:21:27 GMT