18 May
2016
18 May
'16
10:53 p.m.
On Thu, May 19, 2016 02:33, Noel Chiappa wrote:
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
Ed
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From: Ed
Groenenberg
After hooking up the PMK05 to the unibus, the
machine was powered up
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 the
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