> I feel like a dummy for not seeing that.

I just noticed that you have pull-ups on the BCD lines, => the XOR is
complementing an inverted input. So AND is not appropriate, unless
you are incrementing a loop up to 0x0f (or 0 by adding 0xf0)
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist