Thanks for the ideas!  After reading them all, I picked out what I
considered the cream and now have my "debug configuration" all set up.  It
includes (a) an LED which periodically blinks, just to show that everything
is running, (b) a row of 4 LED's, and (c) a routine which, when called with
a number between 1 and 15 inclusive in the WREG will display that number in
binary using the 4 LED's and then go to sleep.

Pushing a button (attached to INT0) will cause an interrupt, which turns
the 4 LED's off and resumes running the program.

So this gives me the capability of displaying up to 15 different numbers,
from anywhere in the program, with each number having a different
meaning.  Crude, to be sure, but should be effective.  So thanks again for
all the good ideas.  Oh, and I also got the corner grocery to let me put a
jar on the counter, with a message saying: "Help John get the ICD he so
desperately needs!"  I seeded it with some change and a couple of bills, so
who knows what may come of that? :-)

John

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu