Hi Angus,

Yep. I don't use too many chips so I can't say this effects all chips ending in 'A'. I've tested the 84A, 628A chips and they only programmed the first time for me. Subsequent writes failed.

Not that it matters I mostly use the F88 these day's with no problems.

I'm glad it works for you and your happy. For a cheap and dirty programmer it does the job very well. Anyone else wanting a more reliable solution should buy a specialist programmer and pay a handsome sum for it. Mr_e will gladly take your money!

Have you tried using Winpic800 (Free prog software)? Its a lot faster at programming than IC-Prog.

Cheers