19 Jun
2020
19 Jun
'20
12:24 p.m.
It appears that my RK8E has a problem - it fails the diskless control test
with
.R DHRKAE.DG
SR= 0000
COMMAND REGISTER ERROR
PC:1160 GD:0000 CM:0001
DHRKAE FAILED PC:6726 AC:0000 MQ:7777 FL:0000
WAITING
Ok, maybe a bad bit in the command register so I'll check it out. But then
it dawns on me - how do you work on this thing? It's three boards connected
with "over the top" connectors - you can't use a module extender on it.
Worse, the M7105 Major Registers board is the middle one of the stack! Is
there some secret to working on this thing? Has anybody fixed one? Any
suggestions?
I hadn't thought about it before, but the KK8E CPU would have the same
problem. Fingers crossed that one never dies...
Bob