4 Feb
2015
4 Feb
'15
2:57 p.m.
Finally getting back to this:
From: Brent Hilpert
> Again, I have a sitation where a bit is stuck on,
and I'm curious to
> see if anyone has any insight into which chip (of 3) might be causing
> it (in an attempt to not have to try replacing them at random :-).
(Are they 4116 memory chips in use?)
Yes.
a means to isolate which of the 3 points (ICs/pins) is
the problem
might (not guaranteed) be:
...
If the state is only faulty after one of the accesses it suggests the
according mem chip is the failure point. ... distinguish the accesses
to the upper and lower bank to try to isolate when the circuit enters
the faulty state, and see whether it's common to both banks or only one.
Thank you! Thank you!! Thank You!!! That worked a treat; found the bad chip
first time! Thanks again!
Noel