> When the C64 generates a pulse waveform, you choose how
> much of the cycle is spent at the "top" of the waveform...
> I've currently got that at 50%, I guess this works best...
Dunno what terminology is used in the supercharger spec, but for electronics
in general, pulse width is the time spent high, vs period which is the cycle
length. Pulse width divided by period gives you the duty cycle, which would
correspond to the 50% that you mention above.
A 2200Hz square wave with a 50% duty cycle gives a pulse width of 227us.
A 1470Hz square wave with a 50% duty cycle gives a pulse width of 340us.
-Chris
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