[hatari-devel] YM2149 + C10 lowpass filter mapping

[David Savinkoff]

Hi,

A two-channel bank-switched IIR filter is now used to model the
YM2149 + C10 components. This is faster and way better than before.

The YM2149 is filtered at 7.7 KHz when it charges capacitor C10,
and filtered at 2.1 KHz when R8 discharges C10. This is exactly
what happens on a real ST.

David
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