Pommie..
No I have the 12F509 and thought I could program it as a C509 with winpicprog. I programmed it, winpicprog said all is good (and we all know there are a lot of factors after that, program works, fuses, etc). I dropped it in the circuit, and no go.
So I figured I could burn it again. I could not erase it (not an option since I was in C509 mode).
I used Nigel's winpicprog. Maybe I forgot to flip INT OSC ON, as it seems to default to XT as I reloaded the software, but maybe I did flip it on.. Anyway, I can not re-write to the chip.
Only did one chip, have more so not major. But I do not want to waste anymore in the even I toasted it.
I like Nigel's program, since it likes my programmer. So I would like to stay with that. I can use another one if I have too.
Actually, I have some old 508's with the windows and 2 UV erasers in the garage somewhere.. I do but rather fix it with the F509.