> Does anyone know why the ICD1 will not work with 877A's but will work > with non 'A' 877's? I don't know why they (presumable) did not update their ICD1 for the -A chips, but programming-wise the 16F87x's and the 16F87xA's are completely different chips. Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.