diff options
Diffstat (limited to 'src/m4a_2.c')
| -rw-r--r-- | src/m4a_2.c | 834 |
1 files changed, 834 insertions, 0 deletions
diff --git a/src/m4a_2.c b/src/m4a_2.c new file mode 100644 index 0000000..176910e --- /dev/null +++ b/src/m4a_2.c @@ -0,0 +1,834 @@ +#include "gba/m4a_internal.h" + +extern char SoundMainRAM_Buffer[0x400]; + +extern struct SoundInfo gSoundInfo; + + +u32 MidiKeyToFreq(struct WaveData *wav, u8 key, u8 fineAdjust) +{ + u32 val1; + u32 val2; + u32 fineAdjustShifted = fineAdjust << 24; + + if (key > 178) + { + key = 178; + fineAdjustShifted = 255 << 24; + } + + val1 = gScaleTable[key]; + val1 = gFreqTable[val1 & 0xF] >> (val1 >> 4); + + val2 = gScaleTable[key + 1]; + val2 = gFreqTable[val2 & 0xF] >> (val2 >> 4); + + return umul3232H32(wav->freq, val1 + umul3232H32(val2 - val1, fineAdjustShifted)); +} + +void UnusedDummyFunc() +{ +} + +void MPlayContinue(struct MusicPlayerInfo *mplayInfo) +{ + if (mplayInfo->ident == ID_NUMBER) + { + mplayInfo->ident++; + mplayInfo->status &= ~MUSICPLAYER_STATUS_PAUSE; + mplayInfo->ident = ID_NUMBER; + } +} + +void MPlayFadeOut(struct MusicPlayerInfo *mplayInfo, u16 speed) +{ + if (mplayInfo->ident == ID_NUMBER) + { + mplayInfo->ident++; + mplayInfo->fadeOC = speed; + mplayInfo->fadeOI = speed; + mplayInfo->fadeOV = (64 << FADE_VOL_SHIFT); + mplayInfo->ident = ID_NUMBER; + } +} + +void m4aSoundInit(void) +{ + s32 i; + + CpuCopy32((void *)((s32)SoundMainRAM & ~1), SoundMainRAM_Buffer, sizeof(SoundMainRAM_Buffer)); + + SoundInit(&gSoundInfo); + MPlayExtender(gCgbChans); + m4aSoundMode(SOUND_MODE_DA_BIT_8 + | SOUND_MODE_FREQ_18157 + | (14 << SOUND_MODE_MASVOL_SHIFT) + | (5 << SOUND_MODE_MAXCHN_SHIFT)); + + for (i = 0; i < NUM_MUSIC_PLAYERS; i++) + { + struct MusicPlayerInfo *mplayInfo = gMPlayTable[i].info; + MPlayOpen(mplayInfo, gMPlayTable[i].track, gMPlayTable[i].unk_8); + mplayInfo->unk_B = gMPlayTable[i].unk_A; + mplayInfo->memAccArea = gMPlayMemAccArea; + } +} + +void m4aSoundMain(void) +{ + SoundMain(); +} + +void m4aSongNumStart(u16 n) +{ + const struct MusicPlayer *mplayTable = gMPlayTable; + const struct Song *songTable = gSongTable; + const struct Song *song = &songTable[n]; + const struct MusicPlayer *mplay = &mplayTable[song->ms]; + + MPlayStart(mplay->info, song->header); +} + +void m4aSongNumStartOrChange(u16 n) +{ + const struct MusicPlayer *mplayTable = gMPlayTable; + const struct Song *songTable = gSongTable; + const struct Song *song = &songTable[n]; + const struct MusicPlayer *mplay = &mplayTable[song->ms]; + + if (mplay->info->songHeader != song->header) + { + MPlayStart(mplay->info, song->header); + } + else + { + if ((mplay->info->status & MUSICPLAYER_STATUS_TRACK) == 0 + || (mplay->info->status & MUSICPLAYER_STATUS_PAUSE)) + { + MPlayStart(mplay->info, song->header); + } + } +} + +void m4aSongNumStartOrContinue(u16 n) +{ + const struct MusicPlayer *mplayTable = gMPlayTable; + const struct Song *songTable = gSongTable; + const struct Song *song = &songTable[n]; + const struct MusicPlayer *mplay = &mplayTable[song->ms]; + + if (mplay->info->songHeader != song->header) + MPlayStart(mplay->info, song->header); + else if ((mplay->info->status & MUSICPLAYER_STATUS_TRACK) == 0) + MPlayStart(mplay->info, song->header); + else if (mplay->info->status & MUSICPLAYER_STATUS_PAUSE) + MPlayContinue(mplay->info); +} + + +void m4aSongNumStop(u16 n) +{ + const struct MusicPlayer *mplayTable = gMPlayTable; + const struct Song *songTable = gSongTable; + const struct Song *song = &songTable[n]; + const struct MusicPlayer *mplay = &mplayTable[song->ms]; + + if (mplay->info->songHeader == song->header) + m4aMPlayStop(mplay->info); +} + +void m4aSongNumContinue(u16 n) +{ + const struct MusicPlayer *mplayTable = gMPlayTable; + const struct Song *songTable = gSongTable; + const struct Song *song = &songTable[n]; + const struct MusicPlayer *mplay = &mplayTable[song->ms]; + + if (mplay->info->songHeader == song->header) + MPlayContinue(mplay->info); +} + +void m4aMPlayAllStop(void) +{ + s32 i; + + for (i = 0; i < NUM_MUSIC_PLAYERS; i++) + m4aMPlayStop(gMPlayTable[i].info); +} + +void m4aMPlayContinue(struct MusicPlayerInfo *mplayInfo) +{ + MPlayContinue(mplayInfo); +} + +void m4aMPlayAllContinue(void) +{ + s32 i; + + for (i = 0; i < NUM_MUSIC_PLAYERS; i++) + MPlayContinue(gMPlayTable[i].info); +} + +void m4aMPlayFadeOut(struct MusicPlayerInfo *mplayInfo, u16 speed) +{ + MPlayFadeOut(mplayInfo, speed); +} + +void m4aMPlayFadeOutTemporarily(struct MusicPlayerInfo *mplayInfo, u16 speed) +{ + if (mplayInfo->ident == ID_NUMBER) + { + mplayInfo->ident++; + mplayInfo->fadeOC = speed; + mplayInfo->fadeOI = speed; + mplayInfo->fadeOV = (64 << FADE_VOL_SHIFT) | TEMPORARY_FADE; + mplayInfo->ident = ID_NUMBER; + } +} +void m4aMPlayFadeIn(struct MusicPlayerInfo *mplayInfo, u16 speed) +{ + if (mplayInfo->ident == ID_NUMBER) + { + mplayInfo->ident++; + mplayInfo->fadeOC = speed; + mplayInfo->fadeOI = speed; + mplayInfo->fadeOV = (0 << FADE_VOL_SHIFT) | FADE_IN; + mplayInfo->status &= ~MUSICPLAYER_STATUS_PAUSE; + mplayInfo->ident = ID_NUMBER; + } +} + +void m4aMPlayImmInit(struct MusicPlayerInfo *mplayInfo) +{ + s32 trackCount = mplayInfo->trackCount; + struct MusicPlayerTrack *track = mplayInfo->tracks; + + while (trackCount > 0) + { + if (track->flags & MPT_FLG_EXIST) + { + if (track->flags & MPT_FLG_START) + { + Clear64byte(track); + track->flags = MPT_FLG_EXIST; + track->bendRange = 2; + track->volX = 64; + track->lfoSpeed = 22; + track->tone.type = 1; + } + } + + trackCount--; + track++; + } +} + +void MPlayExtender(struct CgbChannel *cgbChans) +{ + struct SoundInfo *soundInfo; + u32 ident; + + REG_SOUNDCNT_X = SOUND_MASTER_ENABLE + | SOUND_4_ON + | SOUND_3_ON + | SOUND_2_ON + | SOUND_1_ON; + REG_SOUNDCNT_L = 0; // set master volume to zero + REG_NR12 = 0x8; + REG_NR22 = 0x8; + REG_NR42 = 0x8; + REG_NR14 = 0x80; + REG_NR24 = 0x80; + REG_NR44 = 0x80; + REG_NR30 = 0; + REG_NR50 = 0x77; + + soundInfo = SOUND_INFO_PTR; + + ident = soundInfo->ident; + + if (ident != ID_NUMBER) + return; + + soundInfo->ident++; + + gMPlayJumpTable[8] = ply_memacc; + gMPlayJumpTable[17] = ply_lfos; + gMPlayJumpTable[19] = ply_mod; + gMPlayJumpTable[28] = ply_xcmd; + gMPlayJumpTable[29] = ply_endtie; + gMPlayJumpTable[30] = SampleFreqSet; + gMPlayJumpTable[31] = TrackStop; + gMPlayJumpTable[32] = FadeOutBody; + gMPlayJumpTable[33] = TrkVolPitSet; + + soundInfo->cgbChans = (struct CgbChannel *)cgbChans; + soundInfo->CgbSound = CgbSound; + soundInfo->CgbOscOff = CgbOscOff; + soundInfo->MidiKeyToCgbFreq = MidiKeyToCgbFreq; + soundInfo->maxLines = MAX_LINES; + + CpuFill32(0, cgbChans, sizeof(struct CgbChannel) * 4); + + cgbChans[0].ty = 1; + cgbChans[0].panMask = 0x11; + cgbChans[1].ty = 2; + cgbChans[1].panMask = 0x22; + cgbChans[2].ty = 3; + cgbChans[2].panMask = 0x44; + cgbChans[3].ty = 4; + cgbChans[3].panMask = 0x88; + + soundInfo->ident = ident; +} + +void MusicPlayerJumpTableCopy(void) +{ + asm("swi 0x2A"); +} + +void ClearChain(void *x) +{ + void (*func)(void *) = *(&gMPlayJumpTable[34]); + func(x); +} + +void Clear64byte(void *x) +{ + void (*func)(void *) = *(&gMPlayJumpTable[35]); + func(x); +} + +void SoundInit(struct SoundInfo *soundInfo) +{ + soundInfo->ident = 0; + + if (REG_DMA1CNT & (DMA_REPEAT << 16)) + REG_DMA1CNT = ((DMA_ENABLE | DMA_START_NOW | DMA_32BIT | DMA_SRC_INC | DMA_DEST_FIXED) << 16) | 4; + + if (REG_DMA2CNT & (DMA_REPEAT << 16)) + REG_DMA2CNT = ((DMA_ENABLE | DMA_START_NOW | DMA_32BIT | DMA_SRC_INC | DMA_DEST_FIXED) << 16) | 4; + + REG_DMA1CNT_H = DMA_32BIT; + REG_DMA2CNT_H = DMA_32BIT; + REG_SOUNDCNT_X = SOUND_MASTER_ENABLE + | SOUND_4_ON + | SOUND_3_ON + | SOUND_2_ON + | SOUND_1_ON; + REG_SOUNDCNT_H = SOUND_B_FIFO_RESET | SOUND_B_TIMER_0 | SOUND_B_LEFT_OUTPUT + | SOUND_A_FIFO_RESET | SOUND_A_TIMER_0 | SOUND_A_RIGHT_OUTPUT + | SOUND_ALL_MIX_FULL; + REG_SOUNDBIAS_H = (REG_SOUNDBIAS_H & 0x3F) | 0x40; + + REG_DMA1SAD = (s32)soundInfo->pcmBuffer; + REG_DMA1DAD = (s32)®_FIFO_A; + REG_DMA2SAD = (s32)soundInfo->pcmBuffer + PCM_DMA_BUF_SIZE; + REG_DMA2DAD = (s32)®_FIFO_B; + + SOUND_INFO_PTR = soundInfo; + CpuFill32(0, soundInfo, sizeof(struct SoundInfo)); + + soundInfo->maxChans = 8; + soundInfo->masterVolume = 15; + soundInfo->plynote = (u32)ply_note; + soundInfo->CgbSound = DummyFunc; + soundInfo->CgbOscOff = (void (*)(u8))DummyFunc; + soundInfo->MidiKeyToCgbFreq = (u32 (*)(u8, u8, u8))DummyFunc; + soundInfo->ExtVolPit = (u32)DummyFunc; + + MPlayJumpTableCopy(gMPlayJumpTable); + + soundInfo->MPlayJumpTable = (u32)gMPlayJumpTable; + + SampleFreqSet(SOUND_MODE_FREQ_13379); + + soundInfo->ident = ID_NUMBER; +} + +void SampleFreqSet(u32 freq) +{ + struct SoundInfo *soundInfo = SOUND_INFO_PTR; + + freq = (freq & 0xF0000) >> 16; + soundInfo->freq = freq; + soundInfo->pcmSamplesPerVBlank = gPcmSamplesPerVBlankTable[freq - 1]; + soundInfo->pcmDmaPeriod = PCM_DMA_BUF_SIZE / soundInfo->pcmSamplesPerVBlank; + + // LCD refresh rate 59.7275Hz + soundInfo->pcmFreq = (597275 * soundInfo->pcmSamplesPerVBlank + 5000) / 10000; + + // CPU frequency 16.78Mhz + soundInfo->divFreq = (16777216 / soundInfo->pcmFreq + 1) >> 1; + + // Turn off timer 0. + REG_TM0CNT_H = 0; + + // cycles per LCD fresh 280896 + REG_TM0CNT_L = -(280896 / soundInfo->pcmSamplesPerVBlank); + + m4aSoundVSyncOn(); + + while (*(vu8 *)REG_ADDR_VCOUNT == 159) + ; + + while (*(vu8 *)REG_ADDR_VCOUNT != 159) + ; + + REG_TM0CNT_H = TIMER_ENABLE | TIMER_1CLK; +} + +void m4aSoundMode(u32 mode) +{ + struct SoundInfo *soundInfo = SOUND_INFO_PTR; + u32 temp; + + if (soundInfo->ident != ID_NUMBER) + return; + + soundInfo->ident++; + + temp = mode & (SOUND_MODE_REVERB_SET | SOUND_MODE_REVERB_VAL); + + if (temp) + soundInfo->reverb = temp & SOUND_MODE_REVERB_VAL; + + temp = mode & SOUND_MODE_MAXCHN; + + if (temp) + { + struct SoundChannel *chan; + + soundInfo->maxChans = temp >> SOUND_MODE_MAXCHN_SHIFT; + + temp = MAX_DIRECTSOUND_CHANNELS; + chan = &soundInfo->chans[0]; + + while (temp != 0) + { + chan->status = 0; + temp--; + chan++; + } + } + + temp = mode & SOUND_MODE_MASVOL; + + if (temp) + soundInfo->masterVolume = temp >> SOUND_MODE_MASVOL_SHIFT; + + temp = mode & SOUND_MODE_DA_BIT; + + if (temp) + { + temp = (temp & 0x300000) >> 14; + REG_SOUNDBIAS_H = (REG_SOUNDBIAS_H & 0x3F) | temp; + } + + temp = mode & SOUND_MODE_FREQ; + + if (temp) + { + m4aSoundVSyncOff(); + SampleFreqSet(temp); + } + + soundInfo->ident = ID_NUMBER; +} + +void SoundClear(void) +{ + struct SoundInfo *soundInfo = SOUND_INFO_PTR; + s32 i; + void *chan; + + if (soundInfo->ident != ID_NUMBER) + return; + + soundInfo->ident++; + + i = MAX_DIRECTSOUND_CHANNELS; + chan = &soundInfo->chans[0]; + + while (i > 0) + { + ((struct SoundChannel *)chan)->status = 0; + i--; + chan = (void *)((s32)chan + sizeof(struct SoundChannel)); + } + + chan = soundInfo->cgbChans; + + if (chan) + { + i = 1; + + while (i <= 4) + { + soundInfo->CgbOscOff(i); + ((struct CgbChannel *)chan)->sf = 0; + i++; + chan = (void *)((s32)chan + sizeof(struct CgbChannel)); + } + } + + soundInfo->ident = ID_NUMBER; +} + +void m4aSoundVSyncOff(void) +{ + struct SoundInfo *soundInfo = SOUND_INFO_PTR; + + if (soundInfo->ident >= ID_NUMBER && soundInfo->ident <= ID_NUMBER + 1) + { + soundInfo->ident += 10; + + if (REG_DMA1CNT & (DMA_REPEAT << 16)) + REG_DMA1CNT = ((DMA_ENABLE | DMA_START_NOW | DMA_32BIT | DMA_SRC_INC | DMA_DEST_FIXED) << 16) | 4; + + if (REG_DMA2CNT & (DMA_REPEAT << 16)) + REG_DMA2CNT = ((DMA_ENABLE | DMA_START_NOW | DMA_32BIT | DMA_SRC_INC | DMA_DEST_FIXED) << 16) | 4; + + REG_DMA1CNT_H = DMA_32BIT; + REG_DMA2CNT_H = DMA_32BIT; + + CpuFill32(0, soundInfo->pcmBuffer, sizeof(soundInfo->pcmBuffer)); + } +} + +void m4aSoundVSyncOn(void) +{ + struct SoundInfo *soundInfo = SOUND_INFO_PTR; + u32 ident = soundInfo->ident; + + if (ident == ID_NUMBER) + return; + + REG_DMA1CNT_H = DMA_ENABLE | DMA_START_SPECIAL | DMA_32BIT | DMA_REPEAT; + REG_DMA2CNT_H = DMA_ENABLE | DMA_START_SPECIAL | DMA_32BIT | DMA_REPEAT; + + soundInfo->pcmDmaCounter = 0; + soundInfo->ident = ident - 10; +} + +void MPlayOpen(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *tracks, u8 trackCount) +{ + struct SoundInfo *soundInfo; + + if (trackCount == 0) + return; + + if (trackCount > MAX_MUSICPLAYER_TRACKS) + trackCount = MAX_MUSICPLAYER_TRACKS; + + soundInfo = SOUND_INFO_PTR; + + if (soundInfo->ident != ID_NUMBER) + return; + + soundInfo->ident++; + + Clear64byte(mplayInfo); + + mplayInfo->tracks = tracks; + mplayInfo->trackCount = trackCount; + mplayInfo->status = MUSICPLAYER_STATUS_PAUSE; + + while (trackCount != 0) + { + tracks->flags = 0; + trackCount--; + tracks++; + } + + if (soundInfo->func != 0) + { + mplayInfo->func = soundInfo->func; + mplayInfo->intp = soundInfo->intp; + soundInfo->func = 0; + } + + soundInfo->intp = (u32)mplayInfo; + soundInfo->func = (u32)MPlayMain; + soundInfo->ident = ID_NUMBER; + mplayInfo->ident = ID_NUMBER; +} + +void MPlayStart(struct MusicPlayerInfo *mplayInfo, struct SongHeader *songHeader) +{ + s32 i; + u8 unk_B; + struct MusicPlayerTrack *track; + + if (mplayInfo->ident != ID_NUMBER) + return; + + unk_B = mplayInfo->unk_B; + + if (!unk_B + || ((!mplayInfo->songHeader || !(mplayInfo->tracks[0].flags & MPT_FLG_START)) + && ((mplayInfo->status & MUSICPLAYER_STATUS_TRACK) == 0 + || (mplayInfo->status & MUSICPLAYER_STATUS_PAUSE))) + || (mplayInfo->priority <= songHeader->priority)) + { + mplayInfo->ident++; + mplayInfo->status = 0; + mplayInfo->songHeader = songHeader; + mplayInfo->tone = songHeader->tone; + mplayInfo->priority = songHeader->priority; + mplayInfo->clock = 0; + mplayInfo->tempoD = 150; + mplayInfo->tempoI = 150; + mplayInfo->tempoU = 0x100; + mplayInfo->tempoC = 0; + mplayInfo->fadeOI = 0; + + i = 0; + track = mplayInfo->tracks; + + while (i < songHeader->trackCount && i < mplayInfo->trackCount) + { + TrackStop(mplayInfo, track); + track->flags = MPT_FLG_EXIST | MPT_FLG_START; + track->chan = 0; + track->cmdPtr = songHeader->part[i]; + i++; + track++; + } + + while (i < mplayInfo->trackCount) + { + TrackStop(mplayInfo, track); + track->flags = 0; + i++; + track++; + } + + if (songHeader->reverb & 0x80) + m4aSoundMode(songHeader->reverb); + + mplayInfo->ident = ID_NUMBER; + } +} + +void m4aMPlayStop(struct MusicPlayerInfo *mplayInfo) +{ + s32 i; + struct MusicPlayerTrack *track; + + if (mplayInfo->ident != ID_NUMBER) + return; + + mplayInfo->ident++; + mplayInfo->status |= MUSICPLAYER_STATUS_PAUSE; + + i = mplayInfo->trackCount; + track = mplayInfo->tracks; + + while (i > 0) + { + TrackStop(mplayInfo, track); + i--; + track++; + } + + mplayInfo->ident = ID_NUMBER; +} + +void FadeOutBody(struct MusicPlayerInfo *mplayInfo) +{ + s32 i; + struct MusicPlayerTrack *track; + u16 fadeOI = mplayInfo->fadeOI; + register u32 temp asm("r3"); + register u16 mask asm("r2"); + + if (fadeOI == 0) + return; + + mplayInfo->fadeOC--; + + temp = 0xFFFF; + mask = temp; + + if (mplayInfo->fadeOC != 0) + return; + + mplayInfo->fadeOC = fadeOI; + + if (mplayInfo->fadeOV & FADE_IN) + { + mplayInfo->fadeOV += (4 << FADE_VOL_SHIFT); + + if ((u16)(mplayInfo->fadeOV & mask) >= (64 << FADE_VOL_SHIFT)) + { + mplayInfo->fadeOV = (64 << FADE_VOL_SHIFT); + mplayInfo->fadeOI = 0; + } + } + else + { + mplayInfo->fadeOV -= (4 << FADE_VOL_SHIFT); + + if ((s16)(mplayInfo->fadeOV & mask) <= 0) + { + i = mplayInfo->trackCount; + track = mplayInfo->tracks; + + while (i > 0) + { + register u32 fadeOV asm("r7"); + u32 val; + + TrackStop(mplayInfo, track); + + val = TEMPORARY_FADE; + fadeOV = mplayInfo->fadeOV; + val &= fadeOV; + + if (!val) + track->flags = 0; + + i--; + track++; + } + + if (mplayInfo->fadeOV & TEMPORARY_FADE) + mplayInfo->status |= MUSICPLAYER_STATUS_PAUSE; + else + mplayInfo->status = MUSICPLAYER_STATUS_PAUSE; + + mplayInfo->fadeOI = 0; + return; + } + } + + i = mplayInfo->trackCount; + track = mplayInfo->tracks; + + while (i > 0) + { + if (track->flags & MPT_FLG_EXIST) + { + track->volX = (mplayInfo->fadeOV >> FADE_VOL_SHIFT); + track->flags |= MPT_FLG_VOLCHG; + } + + i--; + track++; + } +} + +void TrkVolPitSet(struct MusicPlayerInfo *mplayInfo, struct MusicPlayerTrack *track) +{ + if (track->flags & MPT_FLG_VOLSET) + { + s32 x; + s32 y; + + x = (u32)(track->vol * track->volX) >> 5; + + if (track->modT == 1) + x = (u32)(x * (track->modM + 128)) >> 7; + + y = 2 * track->pan + track->panX; + + if (track->modT == 2) + y += track->modM; + + if (y < -128) + y = -128; + else if (y > 127) + y = 127; + + track->volMR = (u32)((y + 128) * x) >> 8; + track->volML = (u32)((127 - y) * x) >> 8; + } + + if (track->flags & MPT_FLG_PITSET) + { + s32 bend = track->bend * track->bendRange; + register s32 x asm("r1") = track->tune; + x += bend; + x *= 4; + x += (track->keyShift << 8); + x += (track->keyShiftX << 8); + x += track->pitX; + + if (track->modT == 0) + x += 16 * track->modM; + + track->keyM = x >> 8; + track->pitM = x; + } + + track->flags &= ~(MPT_FLG_PITSET | MPT_FLG_VOLSET); +} + +u32 MidiKeyToCgbFreq(u8 chanNum, u8 key, u8 fineAdjust) +{ + if (chanNum == 4) + { + if (key <= 20) + { + key = 0; + } + else + { + key -= 21; + if (key > 59) + key = 59; + } + + return gNoiseTable[key]; + } + else + { + s32 val1; + s32 val2; + + if (key <= 35) + { + fineAdjust = 0; + key = 0; + } + else + { + key -= 36; + if (key > 130) + { + key = 130; + fineAdjust = 255; + } + } + + val1 = gCgbScaleTable[key]; + val1 = gCgbFreqTable[val1 & 0xF] >> (val1 >> 4); + + val2 = gCgbScaleTable[key + 1]; + val2 = gCgbFreqTable[val2 & 0xF] >> (val2 >> 4); + + return val1 + ((fineAdjust * (val2 - val1)) >> 8) + 2048; + } +} + +void CgbOscOff(u8 chanNum) +{ + switch (chanNum) + { + case 1: + REG_NR12 = 8; + REG_NR14 = 0x80; + break; + case 2: + REG_NR22 = 8; + REG_NR24 = 0x80; + break; + case 3: + REG_NR30 = 0; + break; + default: + REG_NR42 = 8; + REG_NR44 = 0x80; + } +} |