29 Apr
2010
29 Apr
'10
11:12 a.m.
Hi
I was thinking about the problem that it would work after
freeze spray=2C until powered on again.
That sounds quite likely. There's a routine that's only run on a cold
start which detects if there's a termninal connected and runs the
appropriate monitor.
It might be that the failing bit was only used during
boot
and not needed for the normal monitor operation.
This would then fail on the next reboot.
Just some idle thinking.
According to my schematic, there's space for 2 8355/8755 chips on the
SDK85 board. One is programmed with the monitor, the other is for
expansion (and is normally not fitted. If the OP gets a working 8755
containing the monitor, then it would be interesting to put the flakey
one in the expansion socket and try reading it out when cold and warm.
-tony