16 Oct
2004
16 Oct
'04
1:22 a.m.
Heh - I was staring at DEC engineering drawings for
hours and it was
giving me a headache! I need to look at all the info for the memory
crate though as the CPU still isn't happy (the run lamp's permanently on
and we can't halt the CPU or toggle any data in from the front panel).
All cards look to be OK in the CPU though, but I suspect there may be a
problem with the memory...
I have seen the same problem with 11/34 systems when the bus grant and
interrupt daisy-chain was broken in the backplane. Are there any empty
Unibus slots? Did you check that the wire-wrap jumper is in place in the
non-DMA device slots?
Michael Thompson
E-Mail: M_Thompson(a)IDS.net