Hi Rodolfo, Try posting your code and THEN see if you get some help. Also, be more specific -- what makes you think RB4 doesn't work? Tim H. In a message dated 8/2/99 2:07:10 PM Pacific Daylight Time, rodolfos@INATEL.BR writes: > Dear PicMasters: > I have a problem using a pic16c84. > I configured the RB4 a input. In MPLAB, the simulation is ok, but > when I test the circuit, the RB4 dont' works. I wrote a small program to > test it, but the RB4 did'nt works. > Can you help me? > > Best Regards: > Rodolfo - Brazil