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apu.cpp
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apu.cpp
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/*
* Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
*
* (c) Copyright 1996 - 2001 Gary Henderson ([email protected]) and
* Jerremy Koot ([email protected])
*
* Super FX C emulator code
* (c) Copyright 1997 - 1999 Ivar ([email protected]) and
* Gary Henderson.
* Super FX assembler emulator code (c) Copyright 1998 zsKnight and _Demo_.
*
* DSP1 emulator code (c) Copyright 1998 Ivar, _Demo_ and Gary Henderson.
* C4 asm and some C emulation code (c) Copyright 2000 zsKnight and _Demo_.
* C4 C code (c) Copyright 2001 Gary Henderson ([email protected]).
*
* DOS port code contains the works of other authors. See headers in
* individual files.
*
* Snes9x homepage: http://www.snes9x.com
*
* Permission to use, copy, modify and distribute Snes9x in both binary and
* source form, for non-commercial purposes, is hereby granted without fee,
* providing that this license information and copyright notice appear with
* all copies and any derived work.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event shall the authors be held liable for any damages
* arising from the use of this software.
*
* Snes9x is freeware for PERSONAL USE only. Commercial users should
* seek permission of the copyright holders first. Commercial use includes
* charging money for Snes9x or software derived from Snes9x.
*
* The copyright holders request that bug fixes and improvements to the code
* should be forwarded to them so everyone can benefit from the modifications
* in future versions.
*
* Super NES and Super Nintendo Entertainment System are trademarks of
* Nintendo Co., Limited and its subsidiary companies.
*/
#include "snes9x.h"
#include "spc700.h"
#include "apu.h"
#include "soundux.h"
#include "cpuexec.h"
//extern int NoiseFreq [32];
#ifdef DEBUGGER
void S9xTraceSoundDSP (const char *s, int i1 = 0, int i2 = 0, int i3 = 0,
int i4 = 0, int i5 = 0, int i6 = 0, int i7 = 0);
#endif
#undef ABS
#define ABS(a) ((a) < 0 ? -(a) : (a))
#define ENVX_SHIFT 24
unsigned long AttackRate [16] = {
4100, 2600, 1500, 1000, 640, 380, 260, 160,
96, 64, 40, 24, 16, 10, 6, 1
};
unsigned long DecayRate [8] = {
1200, 740, 440, 290, 180, 110, 74, 37
};
unsigned long SustainRate [32] = {
/*~0*/0xFFFFFFFF, 38000, 28000, 24000, 19000, 14000, 12000, 9400,
7100, 5900, 4700, 3500, 2900, 2400, 1800, 1500,
1200, 880, 740, 590, 440, 370, 290, 220,
180, 150, 110, 92, 74, 55, 37, 18
};
unsigned long IncreaseRate [32] = {
/*~0*/0xFFFFFFFF, 4100, 3100, 2600, 2000, 1500, 1300, 1000,
770, 640, 510, 380, 320, 260, 190, 160,
130, 96, 80, 64, 48, 40, 32, 24,
20, 16, 12, 10, 8, 6, 4, 2
};
unsigned long DecreaseRateExp [32] = {
/*~0*/0xFFFFFFFF, 38000, 28000, 24000, 19000, 14000, 12000, 9400,
7100, 5900, 4700, 3500, 2900, 2400, 1800, 1500,
1200, 880, 740, 590, 440, 370, 290, 220,
180, 150, 110, 92, 74, 55, 37, 18
};
// precalculated env rates for S9xSetEnvRate
unsigned long AttackERate [16][10];
unsigned long DecayERate [8][10];
unsigned long SustainERate [32][10];
unsigned long IncreaseERate [32][10];
unsigned long DecreaseERateExp[32][10];
unsigned long KeyOffERate[10];
static inline void S9xSetEnvelopeRate (int channel, unsigned long rate, int direction, int target, unsigned int mode)
{
S9xSetEnvRate (&SoundData.channels [channel], rate, direction, target, mode);
}
static inline void S9xSetSoundADSR (int channel, int attack_ind, int decay_ind,
int sustain_ind, int sustain_level, int release_rate)
{
int attack_rate = AttackRate [attack_ind];
int decay_rate = DecayRate [decay_ind];
int sustain_rate = SustainRate [sustain_ind];
// Hack for ROMs that use a very short attack rate, key on a
// channel, then switch to decay mode. e.g. Final Fantasy II.
if (attack_rate == 1)
attack_rate = 0;
SoundData.channels[channel].env_ind_attack = attack_ind;
SoundData.channels[channel].env_ind_decay = decay_ind;
SoundData.channels[channel].env_ind_sustain = sustain_ind;
SoundData.channels[channel].attack_rate = attack_rate;
SoundData.channels[channel].decay_rate = decay_rate;
SoundData.channels[channel].sustain_rate = sustain_rate;
SoundData.channels[channel].release_rate = release_rate;
SoundData.channels[channel].sustain_level = sustain_level + 1;
switch (SoundData.channels[channel].state)
{
case SOUND_ATTACK:
S9xSetEnvelopeRate (channel, attack_rate, 1, 127, 0);
break;
case SOUND_DECAY:
S9xSetEnvelopeRate (channel, decay_rate, -1,
(MAX_ENVELOPE_HEIGHT * (sustain_level + 1)) >> 3, 1<<28);
break;
case SOUND_SUSTAIN:
S9xSetEnvelopeRate (channel, sustain_rate, -1, 0, 2<<28);
break;
}
}
static inline void S9xSetSoundVolume (int channel, short volume_left, short volume_right)
{
Channel *ch = &SoundData.channels[channel];
if (!so.stereo)
volume_left = (ABS(volume_right) + ABS(volume_left)) / 2;
ch->volume_left = volume_left;
ch->volume_right = volume_right;
ch-> left_vol_level = (ch->envx * volume_left) / 128;
ch->right_vol_level = (ch->envx * volume_right) / 128;
}
static inline void S9xSetMasterVolume (short volume_left, short volume_right)
{
if (Settings.DisableMasterVolume)
{
SoundData.master_volume_left = 127;
SoundData.master_volume_right = 127;
SoundData.master_volume [0] = SoundData.master_volume [1] = 127;
}
else
{
if (!so.stereo)
volume_left = (ABS (volume_right) + ABS (volume_left)) / 2;
SoundData.master_volume_left = volume_left;
SoundData.master_volume_right = volume_right;
SoundData.master_volume [0] = volume_left;
SoundData.master_volume [1] = volume_right;
}
}
static inline void S9xSetEchoVolume (short volume_left, short volume_right)
{
if (!so.stereo)
volume_left = (ABS (volume_right) + ABS (volume_left)) / 2;
SoundData.echo_volume_left = volume_left;
SoundData.echo_volume_right = volume_right;
SoundData.echo_volume [0] = volume_left;
SoundData.echo_volume [1] = volume_right;
}
static inline void S9xSetEchoWriteEnable (uint8 byte)
{
SoundData.echo_write_enabled = byte;
S9xSetEchoDelay (APU.DSP [APU_EDL] & 15);
}
static inline void S9xSetFrequencyModulationEnable (uint8 byte)
{
SoundData.pitch_mod = byte & (0xFE);//~1;
}
static inline int S9xGetEnvelopeHeight (int channel)
{
if ((Settings.SoundEnvelopeHeightReading ||
SNESGameFixes.SoundEnvelopeHeightReading2) &&
SoundData.channels[channel].state != SOUND_SILENT &&
SoundData.channels[channel].state != SOUND_GAIN)
{
return (SoundData.channels[channel].envx);
}
//siren fix from XPP
if (SNESGameFixes.SoundEnvelopeHeightReading2 &&
SoundData.channels[channel].state != SOUND_SILENT)
{
return (SoundData.channels[channel].envx);
}
return (0);
}
static inline void S9xSetSoundHertz (int channel, int hertz)
{
SoundData.channels[channel].hertz = hertz;
S9xSetSoundFrequency (channel, hertz);
}
static inline void S9xSetSoundType (int channel, int type_of_sound)
{
SoundData.channels[channel].type = type_of_sound;
}
static inline bool8 S9xSetSoundMode (int channel, int mode)
{
Channel *ch = &SoundData.channels[channel];
switch (mode)
{
case MODE_RELEASE:
if (ch->mode != MODE_NONE)
{
ch->mode = MODE_RELEASE;
return (TRUE);
}
break;
case MODE_DECREASE_LINEAR:
case MODE_DECREASE_EXPONENTIAL:
case MODE_GAIN:
if (ch->mode != MODE_RELEASE)
{
ch->mode = mode;
if (ch->state != SOUND_SILENT)
ch->state = mode;
return (TRUE);
}
break;
case MODE_INCREASE_LINEAR:
case MODE_INCREASE_BENT_LINE:
if (ch->mode != MODE_RELEASE)
{
ch->mode = mode;
if (ch->state != SOUND_SILENT)
ch->state = mode;
return (TRUE);
}
break;
case MODE_ADSR:
if (ch->mode == MODE_NONE || ch->mode == MODE_ADSR)
{
ch->mode = mode;
return (TRUE);
}
}
return (FALSE);
}
static inline void S9xPlaySample (int channel)
{
Channel *ch = &SoundData.channels[channel];
ch->state = SOUND_SILENT;
ch->mode = MODE_NONE;
ch->envx = 0;
ch->envxx = 0;
ch->g_index=0;
ch->gaussian[0]=ch->gaussian[1]=ch->gaussian[2]=ch->gaussian[3]=0;
S9xFixEnvelope (channel,
APU.DSP [APU_GAIN + (channel << 4)],
APU.DSP [APU_ADSR1 + (channel << 4)],
APU.DSP [APU_ADSR2 + (channel << 4)]);
ch->sample_number = APU.DSP [APU_SRCN + channel * 0x10];
if (APU.DSP [APU_NON] & (1 << channel))
ch->type = SOUND_NOISE;
else
ch->type = SOUND_SAMPLE;
S9xSetSoundFrequency (channel, ch->hertz);
ch->loop = FALSE;
ch->needs_decode = TRUE;
ch->last_block = FALSE;
ch->previous [0] = ch->previous[1] = 0;
ch->block_pointer = *S9xGetSampleAddress(ch->sample_number);
ch->sample_pointer = 0;
ch->env_error = 0;
ch->next_sample = 0;
ch->interpolate = 0;
ch->last_valid_header=0;
switch (ch->mode)
{
case MODE_ADSR:
if (ch->attack_rate == 0)
{
if (ch->decay_rate == 0 || ch->sustain_level == 8)
{
ch->state = SOUND_SUSTAIN;
ch->envx = (MAX_ENVELOPE_HEIGHT * ch->sustain_level) >> 3;
S9xSetEnvRate (ch, ch->sustain_rate, -1, 0, 2<<28);
}
else
{
ch->state = SOUND_DECAY;
ch->envx = MAX_ENVELOPE_HEIGHT;
S9xSetEnvRate (ch, ch->decay_rate, -1,
(MAX_ENVELOPE_HEIGHT * ch->sustain_level) >> 3, 1<<28);
}
ch-> left_vol_level = (ch->envx * ch->volume_left) / 128;
ch->right_vol_level = (ch->envx * ch->volume_right) / 128;
}
else
{
ch->state = SOUND_ATTACK;
ch->envx = 0;
ch->left_vol_level = 0;
ch->right_vol_level = 0;
S9xSetEnvRate (ch, ch->attack_rate, 1, MAX_ENVELOPE_HEIGHT, 0);
}
ch->envxx = ch->envx << ENVX_SHIFT;
break;
case MODE_GAIN:
ch->state = SOUND_GAIN;
break;
case MODE_INCREASE_LINEAR:
ch->state = SOUND_INCREASE_LINEAR;
break;
case MODE_INCREASE_BENT_LINE:
ch->state = SOUND_INCREASE_BENT_LINE;
break;
case MODE_DECREASE_LINEAR:
ch->state = SOUND_DECREASE_LINEAR;
break;
case MODE_DECREASE_EXPONENTIAL:
ch->state = SOUND_DECREASE_EXPONENTIAL;
break;
default:
break;
}
S9xFixEnvelope (channel,
APU.DSP [APU_GAIN + (channel << 4)],
APU.DSP [APU_ADSR1 + (channel << 4)],
APU.DSP [APU_ADSR2 + (channel << 4)]);
}
#ifdef ASM_SPC700
extern "C" uint32 Spc700JumpTab;
#endif
bool8 S9xInitAPU ()
{
// notaz
memset(&IAPU, 0, sizeof(IAPU));
IAPU.ExtraRAM = APU.ExtraRAM;
#ifdef ASM_SPC700
IAPU.asmJumpTab = &Spc700JumpTab;
#endif
IAPU.RAM = (uint8 *) malloc (0x10000);
IAPU.ShadowRAM = NULL;//(uint8 *) malloc (0x10000);
IAPU.CachedSamples = NULL;//(uint8 *) malloc (0x40000);
if (!IAPU.RAM /*|| !IAPU.ShadowRAM || !IAPU.CachedSamples*/)
{
S9xDeinitAPU ();
return (FALSE);
}
return (TRUE);
}
void S9xDeinitAPU ()
{
if (IAPU.RAM)
{
free ((char *) IAPU.RAM);
IAPU.RAM = NULL;
}
if (IAPU.ShadowRAM)
{
free ((char *) IAPU.ShadowRAM);
IAPU.ShadowRAM = NULL;
}
if (IAPU.CachedSamples)
{
free ((char *) IAPU.CachedSamples);
IAPU.CachedSamples = NULL;
}
}
EXTERN_C uint8 APUROM [64];
void S9xResetAPU ()
{
memset (IAPU.RAM, Settings.APURAMInitialValue, 0x10000);
//memset (IAPU.ShadowRAM, Settings.APURAMInitialValue, 0x10000);
//ZeroMemory (IAPU.CachedSamples, 0x40000);
ZeroMemory (APU.OutPorts, 4);
IAPU.DirectPage = IAPU.RAM;
memmove (&IAPU.RAM [0xffc0], APUROM, sizeof (APUROM));
memmove (APU.ExtraRAM, APUROM, sizeof (APUROM));
IAPU.PC = IAPU.RAM + IAPU.RAM [0xfffe] + (IAPU.RAM [0xffff] << 8);
CPU.APU_Cycles = 0;
IAPU.YA.W = 0;
IAPU.X = 0;
IAPU.S = 0xff;
IAPU.P = 0;
S9xAPUUnpackStatus ();
CPU.APU_APUExecuting = Settings.APUEnabled;
#ifdef SPC700_SHUTDOWN
IAPU.WaitAddress1 = NULL;
IAPU.WaitAddress2 = NULL;
IAPU.WaitCounter = 0;
#endif
APU.ShowROM = TRUE;
IAPU.RAM [0xf1] = 0x80;
int i;
for (i = 0; i < 3; i++)
{
APU.TimerEnabled [i] = FALSE;
APU.TimerValueWritten [i] = 0;
APU.TimerTarget [i] = 0;
APU.Timer [i] = 0;
}
for (int j = 0; j < 0x80; j++)
APU.DSP [j] = 0;
IAPU.TwoCycles = IAPU.OneCycle * 2;
for (i = 0; i < 256; i++)
S9xAPUCycles [i] = S9xAPUCycleLengths [i] * IAPU.OneCycle;
APU.DSP [APU_ENDX] = 0;
APU.DSP [APU_KOFF] = 0;
APU.DSP [APU_KON] = 0;
APU.DSP [APU_FLG] = APU_MUTE | APU_ECHO_DISABLED;
APU.KeyedChannels = 0;
S9xResetSound (TRUE);
S9xSetEchoEnable (0);
}
extern int framecpto;
void S9xSetAPUDSP (uint8 byte)
{
uint8 reg = IAPU.RAM [0xf2];
static uint8 KeyOn;
static uint8 KeyOnPrev;
int i;
switch (reg)
{
case APU_FLG:
if (byte & APU_SOFT_RESET)
{
APU.DSP [reg] = APU_MUTE | APU_ECHO_DISABLED | (byte & 0x1f);
APU.DSP [APU_ENDX] = 0;
APU.DSP [APU_KOFF] = 0;
APU.DSP [APU_KON] = 0;
S9xSetEchoWriteEnable (FALSE);
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] DSP reset\n", ICPU.Scanline);
#endif
// Kill sound
S9xResetSound (FALSE);
}
else
{
S9xSetEchoWriteEnable (!(byte & APU_ECHO_DISABLED));
if (byte & APU_MUTE)
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] Mute sound\n", ICPU.Scanline);
#endif
S9xSetSoundMute (TRUE);
}
else
S9xSetSoundMute (FALSE);
SoundData.noise_hertz = NoiseFreq [byte & 0x1f];
for (i = 0; i < 8; i++)
{
if (SoundData.channels [i].type == SOUND_NOISE)
S9xSetSoundFrequency (i, SoundData.noise_hertz);
}
}
break;
case APU_NON:
if (byte != APU.DSP [APU_NON])
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] Noise:", ICPU.Scanline);
#endif
uint8 mask = 1;
for (int c = 0; c < 8; c++, mask <<= 1)
{
uint8 bit = byte & mask;
if (bit)
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
{
if (APU.DSP [reg] & mask)
S9xTraceSoundDSP ("%d,", c);
else
S9xTraceSoundDSP ("%d(on),", c);
}
#endif
S9xSetSoundType(c, SOUND_NOISE);
}
else
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
{
if (APU.DSP [reg] & mask)
S9xTraceSoundDSP ("%d(off),", c);
}
#endif
S9xSetSoundType(c, SOUND_SAMPLE);
}
}
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("\n");
#endif
}
break;
case APU_MVOL_LEFT:
if (byte != APU.DSP [APU_MVOL_LEFT])
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] Master volume left:%d\n",
ICPU.Scanline, (signed char) byte);
#endif
S9xSetMasterVolume ((signed char) byte,
(signed char) APU.DSP [APU_MVOL_RIGHT]);
}
break;
case APU_MVOL_RIGHT:
if (byte != APU.DSP [APU_MVOL_RIGHT])
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] Master volume right:%d\n",
ICPU.Scanline, (signed char) byte);
#endif
S9xSetMasterVolume ((signed char) APU.DSP [APU_MVOL_LEFT],
(signed char) byte);
}
break;
case APU_EVOL_LEFT:
if (byte != APU.DSP [APU_EVOL_LEFT])
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] Echo volume left:%d\n",
ICPU.Scanline, (signed char) byte);
#endif
S9xSetEchoVolume ((signed char) byte,
(signed char) APU.DSP [APU_EVOL_RIGHT]);
}
break;
case APU_EVOL_RIGHT:
if (byte != APU.DSP [APU_EVOL_RIGHT])
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] Echo volume right:%d\n",
ICPU.Scanline, (signed char) byte);
#endif
S9xSetEchoVolume ((signed char) APU.DSP [APU_EVOL_LEFT],
(signed char) byte);
}
break;
case APU_ENDX:
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] Reset ENDX\n", ICPU.Scanline);
#endif
byte = 0;
break;
case APU_KOFF:
// if (byte)
{
uint8 mask = 1;
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] Key off:", ICPU.Scanline);
#endif
for (int c = 0; c < 8; c++, mask <<= 1)
{
if ((byte & mask) != 0)
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("%d,", c);
#endif
if (APU.KeyedChannels & mask)
{
{
KeyOnPrev&=~mask;
APU.KeyedChannels &= ~mask;
APU.DSP [APU_KON] &= ~mask;
//APU.DSP [APU_KOFF] |= mask;
S9xSetSoundKeyOff (c);
}
}
}
else if((KeyOnPrev&mask)!=0)
{
KeyOnPrev&=~mask;
APU.KeyedChannels |= mask;
//APU.DSP [APU_KON] |= mask;
APU.DSP [APU_KOFF] &= ~mask;
APU.DSP [APU_ENDX] &= ~mask;
S9xPlaySample (c);
}
}
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("\n");
#endif
}
//KeyOnPrev=0;
APU.DSP [APU_KOFF] = byte;
return;
case APU_KON:
if (byte)
{
uint8 mask = 1;
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] Key on:", ICPU.Scanline);
#endif
for (int c = 0; c < 8; c++, mask <<= 1)
{
if ((byte & mask) != 0)
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("%d,", c);
#endif
// Pac-In-Time requires that channels can be key-on
// regardeless of their current state.
if((APU.DSP [APU_KOFF] & mask) ==0)
{
KeyOnPrev&=~mask;
APU.KeyedChannels |= mask;
//APU.DSP [APU_KON] |= mask;
//APU.DSP [APU_KOFF] &= ~mask;
APU.DSP [APU_ENDX] &= ~mask;
S9xPlaySample (c);
}
else KeyOn|=mask;
}
}
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("\n");
#endif
}
return;
case APU_VOL_LEFT + 0x00:
case APU_VOL_LEFT + 0x10:
case APU_VOL_LEFT + 0x20:
case APU_VOL_LEFT + 0x30:
case APU_VOL_LEFT + 0x40:
case APU_VOL_LEFT + 0x50:
case APU_VOL_LEFT + 0x60:
case APU_VOL_LEFT + 0x70:
// At Shin Megami Tensei suggestion 6/11/00
// if (byte != APU.DSP [reg])
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] %d volume left: %d\n",
ICPU.Scanline, reg>>4, (signed char) byte);
#endif
S9xSetSoundVolume (reg >> 4, (signed char) byte,
(signed char) APU.DSP [reg + 1]);
}
break;
case APU_VOL_RIGHT + 0x00:
case APU_VOL_RIGHT + 0x10:
case APU_VOL_RIGHT + 0x20:
case APU_VOL_RIGHT + 0x30:
case APU_VOL_RIGHT + 0x40:
case APU_VOL_RIGHT + 0x50:
case APU_VOL_RIGHT + 0x60:
case APU_VOL_RIGHT + 0x70:
// At Shin Megami Tensei suggestion 6/11/00
// if (byte != APU.DSP [reg])
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] %d volume right: %d\n",
ICPU.Scanline, reg >>4, (signed char) byte);
#endif
S9xSetSoundVolume (reg >> 4, (signed char) APU.DSP [reg - 1],
(signed char) byte);
}
break;
case APU_P_LOW + 0x00:
case APU_P_LOW + 0x10:
case APU_P_LOW + 0x20:
case APU_P_LOW + 0x30:
case APU_P_LOW + 0x40:
case APU_P_LOW + 0x50:
case APU_P_LOW + 0x60:
case APU_P_LOW + 0x70:
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] %d freq low: %d\n",
ICPU.Scanline, reg>>4, byte);
#endif
S9xSetSoundHertz (reg >> 4, (((byte + (APU.DSP [reg + 1] << 8)) & FREQUENCY_MASK) * 32000) >> 12);
break;
case APU_P_HIGH + 0x00:
case APU_P_HIGH + 0x10:
case APU_P_HIGH + 0x20:
case APU_P_HIGH + 0x30:
case APU_P_HIGH + 0x40:
case APU_P_HIGH + 0x50:
case APU_P_HIGH + 0x60:
case APU_P_HIGH + 0x70:
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] %d freq high: %d\n",
ICPU.Scanline, reg>>4, byte);
#endif
S9xSetSoundHertz (reg >> 4,
(((byte << 8) + APU.DSP [reg - 1]) & FREQUENCY_MASK) * 8);
break;
case APU_SRCN + 0x00:
case APU_SRCN + 0x10:
case APU_SRCN + 0x20:
case APU_SRCN + 0x30:
case APU_SRCN + 0x40:
case APU_SRCN + 0x50:
case APU_SRCN + 0x60:
case APU_SRCN + 0x70:
if (byte != APU.DSP [reg])
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] %d sample number: %d\n",
ICPU.Scanline, reg>>4, byte);
#endif
//S9xSetSoundSample (reg >> 4, byte); // notaz: seems to be unused?
}
break;
case APU_ADSR1 + 0x00:
case APU_ADSR1 + 0x10:
case APU_ADSR1 + 0x20:
case APU_ADSR1 + 0x30:
case APU_ADSR1 + 0x40:
case APU_ADSR1 + 0x50:
case APU_ADSR1 + 0x60:
case APU_ADSR1 + 0x70:
if (byte != APU.DSP [reg])
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] %d adsr1: %02x\n",
ICPU.Scanline, reg>>4, byte);
#endif
{
S9xFixEnvelope (reg >> 4, APU.DSP [reg + 2], byte,
APU.DSP [reg + 1]);
}
}
break;
case APU_ADSR2 + 0x00:
case APU_ADSR2 + 0x10:
case APU_ADSR2 + 0x20:
case APU_ADSR2 + 0x30:
case APU_ADSR2 + 0x40:
case APU_ADSR2 + 0x50:
case APU_ADSR2 + 0x60:
case APU_ADSR2 + 0x70:
if (byte != APU.DSP [reg])
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] %d adsr2: %02x\n",
ICPU.Scanline, reg>>4, byte);
#endif
{
S9xFixEnvelope (reg >> 4, APU.DSP [reg + 1], APU.DSP [reg - 1],
byte);
}
}
break;
case APU_GAIN + 0x00:
case APU_GAIN + 0x10:
case APU_GAIN + 0x20:
case APU_GAIN + 0x30:
case APU_GAIN + 0x40:
case APU_GAIN + 0x50:
case APU_GAIN + 0x60:
case APU_GAIN + 0x70:
if (byte != APU.DSP [reg])
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] %d gain: %02x\n",
ICPU.Scanline, reg>>4, byte);
#endif
{
S9xFixEnvelope (reg >> 4, byte, APU.DSP [reg - 2],
APU.DSP [reg - 1]);
}
}
break;
case APU_ENVX + 0x00:
case APU_ENVX + 0x10:
case APU_ENVX + 0x20:
case APU_ENVX + 0x30:
case APU_ENVX + 0x40:
case APU_ENVX + 0x50:
case APU_ENVX + 0x60:
case APU_ENVX + 0x70:
break;
case APU_OUTX + 0x00:
case APU_OUTX + 0x10:
case APU_OUTX + 0x20:
case APU_OUTX + 0x30:
case APU_OUTX + 0x40:
case APU_OUTX + 0x50:
case APU_OUTX + 0x60:
case APU_OUTX + 0x70:
break;
case APU_DIR:
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
S9xTraceSoundDSP ("[%d] Sample directory to: %02x\n",
ICPU.Scanline, byte);
#endif
break;
case APU_PMON:
if (byte != APU.DSP [APU_PMON])
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
{
S9xTraceSoundDSP ("[%d] FreqMod:", ICPU.Scanline);
uint8 mask = 1;
for (int c = 0; c < 8; c++, mask <<= 1)
{
if (byte & mask)
{
if (APU.DSP [reg] & mask)
S9xTraceSoundDSP ("%d", c);
else
S9xTraceSoundDSP ("%d(on),", c);
}
else
{
if (APU.DSP [reg] & mask)
S9xTraceSoundDSP ("%d(off),", c);
}
}
S9xTraceSoundDSP ("\n");
}
#endif
S9xSetFrequencyModulationEnable (byte);
}
break;
case APU_EON:
if (byte != APU.DSP [APU_EON])
{
#ifdef DEBUGGER
if (Settings.TraceSoundDSP)
{
S9xTraceSoundDSP ("[%d] Echo:", ICPU.Scanline);
uint8 mask = 1;
for (int c = 0; c < 8; c++, mask <<= 1)
{
if (byte & mask)
{
if (APU.DSP [reg] & mask)
S9xTraceSoundDSP ("%d", c);
else
S9xTraceSoundDSP ("%d(on),", c);
}
else
{
if (APU.DSP [reg] & mask)
S9xTraceSoundDSP ("%d(off),", c);
}
}
S9xTraceSoundDSP ("\n");
}
#endif
S9xSetEchoEnable (byte);
}
break;
case APU_EFB:
S9xSetEchoFeedback ((signed char) byte);
break;
case APU_ESA:
break;
case APU_EDL:
S9xSetEchoDelay (byte & 0xf);
break;
case APU_C0:
case APU_C1:
case APU_C2:
case APU_C3:
case APU_C4:
case APU_C5:
case APU_C6:
case APU_C7:
S9xSetFilterCoefficient (reg >> 4, (signed char) byte);
break;
default:
// XXX
//printf ("Write %02x to unknown APU register %02x\n", byte, reg);
break;
}
KeyOnPrev|=KeyOn;
KeyOn=0;
if (reg < 0x80)
APU.DSP [reg] = byte;
}
void S9xFixEnvelope (int channel, uint8 gain, uint8 adsr1, uint8 adsr2)
{
if (adsr1 & 0x80)
{
// ADSR mode
// XXX: can DSP be switched to ADSR mode directly from GAIN/INCREASE/
// DECREASE mode? And if so, what stage of the sequence does it start
// at?
if (S9xSetSoundMode (channel, MODE_ADSR))
{
S9xSetSoundADSR (channel, adsr1 & 0xf, (adsr1 >> 4) & 7, adsr2 & 0x1f, (adsr2 >> 5) & 7, 8);
}
}
else
{
// Gain mode
if ((gain & 0x80) == 0)
{