You get back quickly don't you. Thanks

Its likely i have no chance to find the details as I am not even at home where it would be, so I think the only option is to skip the upgrade idea and find another way.

I do understand the prinicple of programming the chips so could get by using the epic and some delphi code just have to find an example.

Do you know of a project using the 12F675 that will do what I am trying?

Are you the Mel in Melabs?

Andy