stef mientki wrote: > If you want to the fastest, you should use a bootloader. I don't see anything inherently slower about ICSP than a bootloader. In either case the data must be sent from the PC and the PIC's non-volatile memory written to. In most cases the actual write time will dominate. On some of the newer chips with large write buffers, the ICSP clocking time could be more significant and probably less than the instructions a bootloader must execute, but probably not by much. ****************************************************************** 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