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toyoshim / SoundCortex

A firmware that makes your microcomputer work as a historical sound chip
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PSG: implement enverope #2

Open toyoshim opened 8 years ago

toyoshim commented 8 years ago

originally requested by @opmregisters.

Konami seems to use it for snare attack tone.

toyoshim commented 8 years ago

Implementation note: envelope's phase should be reset on writing values to reg 0xd