http://rafb.net/paste/results/6yyAaI34.html

The code runs fine through the menu system,
buttons pressed under the LCD switch through
the various menus. On lines 63-65, you will
see that I print a msg on the LCD saying I am
querying the SD card, then a delay, then routine
INIT_CARD is run, followed by routine PRINTRESPONSE.

Idea being the values clocked in from the card
should appear as characters on the LCD in PRINTRESPONSE
sub. Using the P1.0 LED on the SBC, and moving the
command through the INIT_CARD loops, I was able
to determine that the program not getting stuck
inside the routine. It returns to run printresponse.
However, on the LCD, when it gets to this routine,
the LCD resets and clears, and again the messages
appear on the screen. It is if the PRINTRESPONSE
was somehow triggering a reset. I haven't done
anything with the watchdog timer so it should be
disabled by default, the only thing else I have done
tonight that I've not done before is messing with
the stack.

I did check through the code and I am never more than
4 CALLs deep, although I do hit 4 a few times; can the
stack and using PUSH/PULL with lots of RETs cause this
type of behavior? Any suggestions?