Erik Reikes wrote: > writing fixed values and bsf do not work unless other pins in the circuit > are also set and switched. I'm also looking at the pin with a scope and > seeing a high voltage on the sucker. Have you tried isolating porta and just use a LED to test? Maybe your circuit is causing the problem. I just checked the data sheet for F8XX series and the input circuits on port A and B work with TTL levels (?). -- Best regards Tony http://www.picnpoke.com Email sales@picnpoke.com