> That's a design choice. Bootloaders like Wouter's WLoader is
> virtually transparent to the target code. The only hoop is the
> memory that the bootloader occupies. WLoader also protects itself
> from being overwritten. And the single pin serial interface imposes 
> a minimal I/O budget.

Note that WLoader and ZPL protect themselves from being overwritten by
the bootloading, but not from being overwritten by the running
application code itself! It is possible to achieve that (on PICs that
have memory sections that can be write-protected individually), but I
see no way to combine that with transparency.

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu
 

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