Are the fuses the same in the 16C71-04 as the 16C71-20, as regards the
oscillator? In other words, even though it's only a 4 MHz part, can the
oscillator be run in HS mode? I know it uses more current in that mode, I
just need to know if the fuses are physically there, and if the chips are
functionally equal except for speed rating.

Thanks,

Bob