At 21:55 11/07/99 -0400, you wrote: You need to first program you own boot loader code using a programmer. Then you can program these parts from running code if the proper bits are set in the config word. They do not come with a boot loader preprogrammed. Jim >Some of the schematics show the 16F87X as being programmable through the >serial port without other support circuitry than a level shifter. The spec >sheet seems to say you have to load 6-bit command words and then 14-bit data >words with stop and start bits. Do these 16F87X's have boot loaders already >installed? What am I missing? > >I am new to PICs as you can probably tell. > >Ted > ________________________________________ Email: newfound@pipeline.com.au http://www.new-elect.com MPLAB compatible PIC programmers and firmware upgrades for many programmers. ________________________________________