On Thu, May 19, 2016 02:33, Noel Chiappa wrote: > > 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 >
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 -- Ik email, dus ik besta. BTC : 1J5fajt8ptyZ2V1YURj3YJZhe5j3fJVSHN LTC : LP2WuEmYPbpWUBqMFGJfdm7pdHEW7fKvDz
