> Your 0.5 guilder ($0.25) charge pump circuit is great. If you closed
> the loop by sensing the output with an A/D (eg, PIC71), it would be
> even better. [minor point - the RS-232 interface could be improved
> a little].

Thanks for the praise, but such a charge pump is rather standard. Using a
non-flash PIC is a bit against my principle: use something that enables a
quick code-and-try cycle. The RS232 interface is VERY crude - I was running
against the 100 pins limit of the free Ivex tools I used...

> I hope you come up with something equally great for the '87x.

I'm working on loader firmware that can cooperate with the dos WISP command
line tool. BTW I use a WISP programmer to program the 16F877 in-circuit,
works fine! I just modified the command-line tool a little because the code
protection bits in the fuses word of a 16f877 are different.

regards,
Wouter