Ever need an extra output pin on a 10F2xx chip? It can be done apparently, 
though the data rate is probably slow - but good enough for debugging output 
to a LED.

The technique would also have some reverse engineering types scratching 
their heads ...

http://www.edn.com/contents/images/6515349.pdf

Technique can also be used on some larger chips apparently. 

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