29 Nov
2016
29 Nov
'16
10:10 a.m.
On Tue, Nov 29, 2016 at 12:50 PM, Noel Chiappa <jnc at mercury.lcs.mit.edu>
wrote:
Thanks for finding that for me.
A DC LO has crept up, I can't take this any further until I fix that
issue. Not sure if it's the M7231 or a power supply component yet. I am
about ready to throw this thing out the window :-) .... if it would fit.
The problem with address 16 may have been related to the failure that
ultimately lead to the DC LO (-0.22 V) value. It wasn't an issue until
yesterday afternoon.
b
From: William
Degnan
hit LOAD ADDR
address light 16 comes on, RUN/PROC/BUS/CONSOLE lights stay on.
According to the KD11-A manual (pg. 3-2) the address lights on the console
are driven directly from the CPU's Bus Address Register. So you've got an
issue there.
If I hit START light 16 turns off.
So it's not wedged on in the CPU. Maybe a console switch issue, then?