I've got one for you: Not all of the parts start the program memory at
the same spot. It took me 3 days to figure out why a program that worked
perfectly on a '84 wouldn't work at all on an '87. I eventually figured
out that my program's first few instructions were overwriting the
interrupt table. I change ONE LITTLE ".ORG" AND IT WORKED PERFECTLY.
AFTER THREE DAYS. AHHHHHHHHHHH.

Hope that helps ;)

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