> My recollection is that Wouter wrote an update Wloader for > the 16F877A. All you need to do is ask him. I did, but it is not on the website yet. It needs an updated XWisp which is also ready, but not on the website yet. When asked I can email it. > It is my opinion that Wouter is the best PIC bootloader > writer around Let's be a bit modest: I think I am the most original one :) A bootloader will always take some resources. It depends on the particular situation which resources are most scarce. A UART-bootloader uses pins (and particular pins!), WLoader and ZPL take less pins but moet code. 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.