> one option ... is to buy spare boards so you can board-swap to localize
> the problem to one board.
> ...
> start with another serial card
Also, if you get a working serial card to use for a console, and you get a
working system as a result, you can then use that ensenble to try and debug
the MXV11-B (you'd have to reconfig its serial line to not be the console).
You can then try all sorts of debugging steps, e.g. try doing deposits/reads
of serial line registers on the MXV11-B to see if you can send/receive
characters - and it that doesn't work, you can then try 'toggling' in a simple
program to send characters in a stream, so you can look at the inputs/outputs
of the EIA chips (those should be findable, even without prints) with a
'scope, to see if they are busted. Etc, etc.
Noel
