This is copied from November 1977 Byte magazine and is included without permission. Special thanks to Harry Dodgson for finding the original article for me. Stephen Wozniak Apple Computer 20863 Stevens Creek Blvd, B3C Cuptertino CA 95014 While writing Apple BASIC for a 6502 microprocessor I repeatedly encountered a variant of Murphy's Law. Briefly stated, any routine operating on 16 bit data will