psg.h

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#ifndef _PSG_H_
#define _PSG_H_

#define PSG_PORT            0xC00011

#define PSG_ENVELOPE_MIN    15

#define PSG_ENVELOPE_MAX    0

#define PSG_NOISE_TYPE_PERIODIC 0

#define PSG_NOISE_TYPE_WHITE    1

#define PSG_NOISE_FREQ_CLOCK2   0

#define PSG_NOISE_FREQ_CLOCK4   1

#define PSG_NOISE_FREQ_CLOCK8   2

#define PSG_NOISE_FREQ_TONE3    3


void PSG_init();

void PSG_write(u8 data);

void PSG_setEnvelope(u8 channel, u8 value);
void PSG_setTone(u8 channel, u16 value);
void PSG_setFrequency(u8 channel, u16 value);
void PSG_setNoise(u8 type, u8 frequency);


#endif // _PSG_H_