29 Jul
2011
29 Jul
'11
4:23 a.m.
Pete Turnbull <pete at dunnington.plus.com>
And the lack of a local ground
is almost certainly where all that hum and noise is from.
OK, I'll recheck with
the ground clip connected when I am back home on sunday.
Classic sign of something wrong with the bus grants.
If the grant
cards
are all the small type, are they the right way round? Is there one in
every slot, including the last (slot 9)?
All emty slots have grand cards. The NPR
wires on the backplane are in place, except slot 8. There is a non DEC, double wide grand
card in this slot. I checked that it connects the grand pins and NPR. I'll recheck
with an ohm meter in case there are any loose contacts.
I have to reconfigure the serial console DL11-W also. Currently it is set to 110 BAUD but
my VT520 doesn't support this. I need to build a new serial cable also. Thats the
reason why I didn't check serial console output. I was in the hope to perform basic
checks with the programmers console and care about the serial console problems later.