Willy: Difference between revisions

Revision as of 02:02, 13 June 2024

Willy - MIDI and OPL3 Soundcard adapter for CPC

The cost for a Willy soundcard adapter is 10€. This does not include any soundcard, you have to buy those separately.

2 ports are used to control the MIDI soundcard: &FEAC for data, and &FEAD for control and status.

3 ports are used to control the OPL3 soundcard: &FEBC and &FEBE are register select ports, and &FEBD is the data port.

OPL3 is register compatible with OPL2, with twice the number of signal sources, 4 new operator modes, 4 new selectable waveforms and stereo output.

OPL3 offers 18 FM 2-op chans in its standard mode, but that can be configured:

One setting converts 3 of the FM channels into a 5-channel percussion set (Bass Drum, Snare Drum, Tom-Tom, Top-Cymbal, Hi-Hat)
Another setting pairs 12 of the FM channels into 6 FM 4-op channels
Both settings can be used at the same time

Also, a square waveform can now be selected on each chan. So the OPL3 can play square waves like the PSG.

@@ Line 19: / Line 19: @@
 ports are used to control the OPL3 soundcard:  &FEBC and &FEBE are register select ports, and &FEBD is the data port.
+OPL3 is register compatible with OPL2, with twice the number of signal sources, 4 new operator modes, 4 new selectable waveforms and stereo output.
 OPL3 offers 18 FM 2-op chans in its standard mode, but that can be configured:
@@ Line 25: / Line 27: @@
 * Both settings can be used at the same time
-Also, The base waveform of each FM chan can be chosen between 8 waveform types, including a square waveform. So the OPL3 can play square waves like the PSG.
+Also, a square waveform can now be selected on each chan. So the OPL3 can play square waves like the PSG.
 == Compatible Serdaco soundcards ==