17 Jan
2004
17 Jan
'04
noon
I am having problems with the pdp 11/04 I picked up last week. If I
power on with the machine without the extra cards, I get output on the
la36 with a $ prompt. So far so good. But with the card cage connected
the run light is permenantly on (ie. with halt switched), with no
output.on anything (There are two rs232, la36 and a display unit)
So the main questions are :
what could cause this ?.
Is your terminator an M9302 (I would guess so, that's the normal one for
the 11/04 and 11/34 machines). If so, then this is the classic symptom of
an open grant chain (this has been discussed here many times before).
Perhaps you're missing a grant continuity card, or perhaps there's a
missing NPG wire-wrap jumper.
It has a dead rk11-d and an untested rk11-c with no
power supply unit
and no case. What sort of power supply runs this, I also picked up about
The original PSU for the RK11-C is an H720 of some flavour.
-tony