If RBIE, the RB port change interrupt bit in the INTCON register, is set to
1, will a change on any RB bit result in an interrupt?  I'm wondering if an
interrupt is generated only if a change is detected on an RB bit that has
been designated as in input, or, will an interrupt also be generated if a
an RB bit that has been designated as an output changes state as a result
of the PIC program itself writing something to it.

Thanks.