I got a little time today to work on the coding for the PIC end of this loader system. Programing entirely in PBP (with the exception of one line of assembler for the final 'GOTO" that starts the downloaded application), it looks like this loader will fit into about 600 bytes of PIC18 memory space - not as bad as I expected.

The down-side is that there are other loaders, coded in assembler, that are as small as 100 bytes. The up side is that this one's written entirely in PBP, is supportable by virtually anyone, and is therefore infinitely scalable for any desired level of functionality by anyone in this community.

In the coming days, I'll try to find time to write the VB6 host application that drives the loader. Once something that functions is available, I'll try to find a way to post the sources so that this can become an open-source, community supported tool.

Joe