24 Jan
2006
24 Jan
'06
2:27 p.m.
But, if you know what and why to do something, a swap
is not a crime.
Our views will differ on this, I suspect :-)
Of course, you swap only *one* board. If that solved
the problem, you
can label the swapped board with a note of the seen symptom.
I say that it solved the problem, not fixed it. That's for later ...
I don't think you can ever say you solved the problem unless you know
what the problem was. Having a problem go away without knowing why is
very unsatisfactory for me. And unles you know exactly how each board
should behave, and have checked the signals, you can't know you've found
the faulty board (We've been through this so many times....)
What I can tell you is how to trace that fault.
The diagnostic seems to
be saying that the top bit (bit 15) of CSR1 could not be cleared. So,
let's grab the prints (but not tonight, it's late...) and find CSR 1,
find out what should set and clear bit 15, and see what's going on there.=
=
That's what I'd do, the diagnostic output is descriptive enough. However,
... I don't have the printset of the RK611 :-( and it is not on bitsavers =