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Elrinth
2026-02-19 23:28:57 +01:00
parent b0d594a9c0
commit 2a36117c25
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52
libs/libgccvb/audio.h Normal file
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#ifndef _LIBGCCVB_AUDIO_H
#define _LIBGCCVB_AUDIO_H
#include "types.h"
typedef struct SOUNDREG
{
// this table is for the most part untested, but looks to be accurate
// | D7 || D6 || D5 || D4 || D3 || D2 || D1 || D0 |
u8 SxINT; // [----Enable----][--XXXXXXXXXX--][-Interval/??--][--------------------------------Interval Data---------------------------------]
u8 spacer1[3];
u8 SxLRV; // [---------------------------L Level----------------------------][---------------------------R Level----------------------------]
u8 spacer2[3];
u8 SxFQL; // [------------------------------------------------------Frequency Low Byte------------------------------------------------------]
u8 spacer3[3];
u8 SxFQH; // [--XXXXXXXXXX--][--XXXXXXXXXX--][--XXXXXXXXXX--][--XXXXXXXXXX--][--XXXXXXXXXX--][--------------Frequency High Byte-------------]
u8 spacer4[3];
u8 SxEV0; // [---------------------Initial Envelope Value-------------------][------U/D-----][-----------------Envelope Step----------------]
u8 spacer5[3];
//Ch. 1-4 [--XXXXXXXXXX--][--XXXXXXXXXX--][--XXXXXXXXXX--][--XXXXXXXXXX--][--XXXXXXXXXX--][--XXXXXXXXXX--][------R/S-----][----On/Off----]
//Ch. 5 [--XXXXXXXXXX--][------E/D-----][----?/Short---][--Mod./Sweep--][--XXXXXXXXXX--][--XXXXXXXXXX--][------R/S-----][----On/Off----]
u8 SxEV1; //Ch. 6 [--XXXXXXXXXX--][----------------------E/D---------------------][--XXXXXXXXXX--][--XXXXXXXXXX--][------R/S-----][----On/Off----]
u8 spacer6[3];
// Ch. 1-5 only (I believe address is only 3 bits, but may be 4, needs testing)
u8 SxRAM; // [--XXXXXXXXXX--][--XXXXXXXXXX--][--XXXXXXXXXX--][--XXXXXXXXXX--][--XXXXXXXXXX--][--------------Waveform RAM Address------------]
u8 spacer7[3];
// Ch. 5 only
u8 S5SWP; // [------CLK-----][-------------Sweep/Modulation Time------------][------U/D-----][----------------Number of Shifts--------------]
u8 spacer8[35];
} SOUNDREG;
extern u8* const WAVEDATA1;
extern u8* const WAVEDATA2;
extern u8* const WAVEDATA3;
extern u8* const WAVEDATA4;
extern u8* const WAVEDATA5;
extern u8* const MODDATA;
extern SOUNDREG* const SND_REGS;
#define SSTOP *(u8*)0x01000580
/***** Sound Register Mnemonics *****/
#define WAVE1 0x00 // Voluntary wave channel #1
#define WAVE2 0x01 // Voluntary wave channel #2
#define WAVE3 0x02 // Voluntary wave channel #3
#define WAVE4 0x03 // Voluntary wave channel #4
#define SWEEP 0x04 // Sweep/modulation channel
#define NOISE 0x05 // Pseudorandom noise channel
#endif