> Do they all communicate data via your pulse protocol? Yes, both bootloader and application. And the units are identified by their order, so no dip switches to set. Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu