Martin McCormick wrote: > The data sheet for the PIC16C71 mentions 3 different types of this > chip. You presumably mean the datasheet for the PIC16C71X. > They are the 16C710, 16c711, and 16c715. I have a 16C71 JW which was > a sample part included with a PICStart16B1 from late 1995. The only > other indication on it is the characters s1. How do I know for sure > which version it is so as to get the right include file when using > mpasm? It's a PIC16C71. Use the P16C71.INC file. -- Cheers, Paul B.