Sorry about blank msg. I can assemble .w/o a problem, but when i actually attempt to run or=20 simulate, MPLAB causes the stepper to vanish. The PIC is PIC16F1947, which has 16K words, so its last location is=20 0x3FFF. i can PROPERLY jump from low memory to 0x1FFF (8K WORDS) but no=20 higher. Using the program memory viewer, I can see my code in the correct place=20 in pgm memory. Actually, I only TRY to go to 0x3d00, to allow room for=20 the ICD3. Ideas, ANYBODY?? --Bob A --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .