30 Nov
2009
30 Nov
'09
1:03 p.m.
On 11/30/09, Pontus Pihlgren <pontus at update.uu.se> wrote:
Hi all.
I've been trying to get my 11/23 back on its feet. I've tried the
following setup:
KDF11-AA (M8186, CPU)
MSV11-DD (M8044-DD, Memory)
DLVJ1-M (M8043, SLU)
BDV11 (M8012)
The power check out ok and I've turned it on with the HALT switch up or
down and get the following behaviour...
I'm not sure what to do next, any suggestions?
Where did you get your console cable? If your box has an external
DE-9 (like a MicroPDP in a BA23), it is *not* pinned the same as a
"PC-AT" serial cable. There's some specific DEC cable you need to
attach the terminal, or some third-party MMJ or RJ11 or RJ45 dongle
for that sort of cabling system. If you have an older machine (not
sure since you call the DLV11J by the newer name DLVJ1) with a
continuous cable from the SLU port right to the terminal, just check
the pins - there's no hardware handshaking, IIRC, so you really just
have to worry about RXD, TXD and GND.
Also, what is your board arrangement in the backplane? You have a
very simple system (CPU, MEM, SLU, termination+boot), but you still
have to preserve the grant chain between the CPU and the BDV-11.
Those are the two things that tend to trip up new PDP-11
configurations - SLU cables and an open grant chain. There's much
information in the Microcomputer Handbooks to investigate and fix both
issues.
-ethan