Hi Wouter, Wouter van Ooijen wrote: >>Maybe not a 16F648A, but wouldn't it be useful to switch to a >>PIC which >>could support a bootloader (16F819?), so that the firmware could be >>updated without having to do the dance with a second chip? > > > Maybe. But the self-programming chips cost more, especially when you > consider that the bootloader part must be write-protected so it is > essentially 'lost'. I tend to agree with the suggested bootloader approach. The higher chip-price is a bargain compared to a second Wisp628 to upgrade the other. A 4K 16F88 is less than 1 Euro more expensive than a 16F628A. BTW would a 'WispUSB' require special USB drivers? Regards, Rob. -- Rob Hamerling, Vianen, NL phone +31-347-322822 homepage: http://www.robh.nl/ -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads