This one seems worth mentioning as I couldn't find it anywhere on the 
web. I was porting the Weeder frequency counter code (from the Piclist 
site) to the 16F6xx chips and I got really stuck. I'd disabled the 
comparators and changed the variables addresses but it still wouldn't 
work on the 628 - stranger still, it seemed to work OK in MPSIM but not 
on the actual chip. Eventually I noticed that the F84 code uses the IRP 
bit of the status register as a bit variable of its own, setting or 
clearing it to indicate overflow in a calculation routine. This still 
seems to work in MPSIM but not on the chip. Changing this bit variable 
to use a normal file register got the code working OK. So, hopefully not 
many people do this, but any F84 code which uses the IRP bit may work 
differently on the 628.

Barry.



-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist