> #include <pic.h>

Maybe you also need your specific pic header file, something like
p16f684.h. This file will change depending on your compiler suite.

>
> __CONFIG(INTIO & WDTDIS & PWRTEN & MCLRDIS & UNPROTECT \
>
> =A0& UNPROTECT & BORDIS);

You have unprotect twice, but no oscillator selection. Double check
these settings. I don't recognize some of the features here, but I
haven't used a 16F684 (or your compiler) either.


> =A0 TRISA4 =3D 0;
>
> =A0 TRISA5 =3D 0;

You should instead set everything to ouput as TRISA=3D0; TRISC=3D0;. You
may have floating inputs (if you haven't tied the pins to a rail with
a resistor) which can cause unexpected behavior.

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