Restoration of an 11/34a - test-drb@ccmp.vtda.org

13 Apr 1999

...
 You did remember to cut the NPG jumper on the slot that
you stuck the 
RL11 in, I hope... 
Thanks... I did forget (I've done mostly Qbus for quite awhile...
so the UNIBUS specific stuff may slip my mind for a bit)

...
 That's the most common 11/34 problem, assuming
you're using an M9302 
terminator. You have a grant open somewhere (either you're missing an 
continuity card or you've got an NPG jumper missing). THe M9302 then 
asserts SACK, the CPU tries to remove the asserted grant line but can't, 
and it locks up. 
Aha... right... I'll have to check the backplane... there were a number
of boards in it, some were probably DMA devices...  (as I said, it may
take a little time for it to come back to me...)

					Megan Gentry
					Former RT-11 Developer

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