19 May
2016
19 May
'16
7:30 a.m.
2016-05-19 7:53 GMT+02:00 E. Groenenberg <ed at groenenberg.net>:
On Thu, May 19, 2016 02:33, Noel Chiappa wrote:
up
the
Since you have a 11/34 I guess that you have a programmer's console (you
maybe mentioned it earlier on). What I did when checking out a 11/04 was to
follow this nice article by J?rg Hoppe:
http://www.retrocmp.com/tools/pdp-1134-programmers-console . Use the M7859
and console only on the bus, just to minimise the number of devices on the
bus that could cause trouble.
In maintenance mode you could check the memory and serial ports etc stand
alone, moving them between different slots etc.
/Mattis
From: Ed
Groenenberg
> After hooking up the PMK05 to the unibus, the machine was powered with the
memory card, and the 'NPG' led was on.
Oh, that's truly wierd. Most memory cards don't even connect to any of bus request/grant lines - they often have short
loopbacks from each
'grant
in' pin to 'grant out' - not sure
about NPG because canonically, that is
jumpered through on the backplane.
A couple of things to check: First, does that memory even have traces
connected to the NPR/NPG-in/NPG-out pins? Second, does a different, known
working card, provoke any problems in that slot? (E.g. your serial
interface
card?) I'm wondering if the problem is the slot, not the card.
Noel
Yes, it does indeed to appear as weird.
The memory card has a trace to continue the NPR line (like the little
wire on the backplane). The card should be okay as it was the original
card.
I changed it for another meory cards (same type), and it has the same
problem. I can indeed put the memory card in slot 5 and move the DL11 to
slot 4 and see if still allows me to send a character to it (with or
without
the memory in place).
I wish I had the documentation of the PMK05, the 2 sheets I have are just
a snippet of information.
Ed