> I have a tube of 16F87xA chips (the 40-pin version) that I couldn't > program with my ISP-Pro programmer. > > The "A" chips require a different programming algorithm than > the normal chips. For programming purposes you must consider the 16F87xA series as totally different from the 16F87x series. Only a programer/host software combo that specifically supports the -A's will work. (the latest version of Wisp628 does) 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.