I'm new to the Piclist, so apologies if this has already been discussed: Is there any reason why the PICs can't access the stack? I'm planning to build a cheap and cheerful ICE out of an '84 incorporating a small resident monitor. Of course, there's no way to follow the program counter position in the code - I'll have to write a simulator to keep track of the p.c. while single-stepping. If the stack were available, it'd be easy. Are there any inexpensive emulators based on this approach? PS. I wonder if off-topic messages will be excluded from the Digest - I hope so. Perhaps there could be a seperate OT digest. Andy.