Wouter van Ooijen wrote:

> > > - try with the dongle circuit
> > And that is what ?
>
> It implements the official Vpp-before-Vcc enter-programming sequence. So
> far I have found that necessary only for PICs that have their /MCLR
> configured as input, but maybe these 18F's are the first that realy need
> this even when the /MCLR pin is just the reset.

I'm pretty sure that I have MCLR configured as MCLR, at least the PIC
resets when I ground the MCLR pin...

>
> You need the extra circuit as attached, to be put between the programmer
> and the target. Preferrably feed the target and the programmer by
> separate 5 Volts, or else add a 220u cap at the programmer's power pins
> (it will steal from the target via the diode). The power to the target
> must be short-circuit proof, recover fast, and not deliver more than 2 A
> or so when shorted. A 7805 or 78L05 power satisfies this requirements
> easily.

Is this tested and verified ?

If not, I can send you a 18F1320 to play with, or
you send me a TIP120. What do you prefer ? :-)

What is a TIP120 b.t.w (besides of a "transistor" :-) ) ?

For the moment I can manage by just breaking the
power to the breadboard (and the Wisp628) before
programming (well, two times each time, but anyway...).

Is this something that can be solved in formware only ?

As I said, I can manage. I think I'll wait until there is a tested and verified
solution for the 18F1320. My offer to lend you one still stands...

As I have said before, impressive support !

Jan-Erik.

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