> To extend that question, what happens when your assembler program finishe= s > execution? What is the next instruction? > =20 Whatever happens to be next in memory. On a pic18 for a simple program (no subroutines for it to fall into) it=20 will usually run off into a series of NOPs (FFFF is NOP on a pic) until=20 eventually the program counter wraps round and it hits the start of your=20 program again. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .