Joe Farr wrote: > However, to get the circuit to run, I have to disconnect the link from > the PIC's MCLR pin to the programmer cable (I can leave all the other > signals connected). It looks like the programmer is dragging this signal > to GND. Yes it does. The EasyProg was originally designed as a in-socket programmer and does not have the capability of releasing the lines to let the target run. The ProProg and the new USB programmer are designed for ICSP and do have this capability, but I know that's not much help in your case. All I can suggest is to put a switch in the Vpp line. I'm actually surprised that the EasyProg isn't also interfering with PGC and PGD. ****************************************************************** Embed Inc, Littleton Massachusetts, (978) 742-9014. #1 PIC consultant in 2004 program year. http://www.embedinc.com/products -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist