/********************************************************************************** Snes9x - Portable Super Nintendo Entertainment System (TM) emulator. (c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com), Jerremy Koot (jkoot@snes9x.com) (c) Copyright 2002 - 2004 Matthew Kendora (c) Copyright 2002 - 2005 Peter Bortas (peter@bortas.org) (c) Copyright 2004 - 2005 Joel Yliluoma (http://iki.fi/bisqwit/) (c) Copyright 2001 - 2006 John Weidman (jweidman@slip.net) (c) Copyright 2002 - 2006 funkyass (funkyass@spam.shaw.ca), Kris Bleakley (codeviolation@hotmail.com) (c) Copyright 2002 - 2007 Brad Jorsch (anomie@users.sourceforge.net), Nach (n-a-c-h@users.sourceforge.net), zones (kasumitokoduck@yahoo.com) (c) Copyright 2006 - 2007 nitsuja BS-X C emulator code (c) Copyright 2005 - 2006 Dreamer Nom, zones C4 x86 assembler and some C emulation code (c) Copyright 2000 - 2003 _Demo_ (_demo_@zsnes.com), Nach, zsKnight (zsknight@zsnes.com) C4 C++ code (c) Copyright 2003 - 2006 Brad Jorsch, Nach DSP-1 emulator code (c) Copyright 1998 - 2006 _Demo_, Andreas Naive (andreasnaive@gmail.com) Gary Henderson, Ivar (ivar@snes9x.com), John Weidman, Kris Bleakley, Matthew Kendora, Nach, neviksti (neviksti@hotmail.com) DSP-2 emulator code (c) Copyright 2003 John Weidman, Kris Bleakley, Lord Nightmare (lord_nightmare@users.sourceforge.net), Matthew Kendora, neviksti DSP-3 emulator code (c) Copyright 2003 - 2006 John Weidman, Kris Bleakley, Lancer, z80 gaiden DSP-4 emulator code (c) Copyright 2004 - 2006 Dreamer Nom, John Weidman, Kris Bleakley, Nach, z80 gaiden OBC1 emulator code (c) Copyright 2001 - 2004 zsKnight, pagefault (pagefault@zsnes.com), Kris Bleakley, Ported from x86 assembler to C by sanmaiwashi SPC7110 and RTC C++ emulator code (c) Copyright 2002 Matthew Kendora with research by zsKnight, John Weidman, Dark Force S-DD1 C emulator code (c) Copyright 2003 Brad Jorsch with research by Andreas Naive, John Weidman S-RTC C emulator code (c) Copyright 2001-2006 byuu, John Weidman ST010 C++ emulator code (c) Copyright 2003 Feather, John Weidman, Kris Bleakley, Matthew Kendora Super FX x86 assembler emulator code (c) Copyright 1998 - 2003 _Demo_, pagefault, zsKnight, Super FX C emulator code (c) Copyright 1997 - 1999 Ivar, Gary Henderson, John Weidman Sound DSP emulator code is derived from SNEeSe and OpenSPC: (c) Copyright 1998 - 2003 Brad Martin (c) Copyright 1998 - 2006 Charles Bilyue' SH assembler code partly based on x86 assembler code (c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se) 2xSaI filter (c) Copyright 1999 - 2001 Derek Liauw Kie Fa HQ2x, HQ3x, HQ4x filters (c) Copyright 2003 Maxim Stepin (maxim@hiend3d.com) Win32 GUI code (c) Copyright 2003 - 2006 blip, funkyass, Matthew Kendora, Nach, nitsuja Mac OS GUI code (c) Copyright 1998 - 2001 John Stiles (c) Copyright 2001 - 2007 zones Specific ports contains the works of other authors. See headers in individual files. Snes9x homepage: http://www.snes9x.com Permission to use, copy, modify and/or 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 or it's derivatives. Snes9x is freeware for PERSONAL USE only. Commercial users should seek permission of the copyright holders first. Commercial use includes, but is not limited to, charging money for Snes9x or software derived from Snes9x, including Snes9x or derivatives in commercial game bundles, and/or using Snes9x as a promotion for your commercial product. 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. **********************************************************************************/ #ifdef __DJGPP #include #undef TRUE #endif #include "snes9x.h" #include "spc700.h" #include "apu.h" #include "soundux.h" #include "display.h" #ifdef DEBUGGER #include "cpuexec.h" #endif /* For note-triggered SPC dump support */ #include "snapshot.h" extern int32 env_counter_table[32]; int spc_is_dumping=0; int spc_is_dumping_temp; uint8 spc_dump_dsp[0x100]; #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 bool8 S9xInitAPU () { IAPU.RAM = (uint8 *) malloc (0x10000); if (!IAPU.RAM) { S9xDeinitAPU (); return (FALSE); } memset(IAPU.RAM, 0, 0x10000); return (TRUE); } void S9xDeinitAPU () { if (IAPU.RAM) { free ((char *) IAPU.RAM); IAPU.RAM = NULL; } } EXTERN_C uint8 APUROM [64]; void S9xResetAPU () { int i; Settings.APUEnabled = Settings.NextAPUEnabled; if(Settings.APUEnabled) APU.Flags &= ~HALTED_FLAG; ZeroMemory(spc_dump_dsp, 0x100); ZeroMemory(IAPU.RAM, 0x100); memset(IAPU.RAM+0x20, 0xFF, 0x20); memset(IAPU.RAM+0x60, 0xFF, 0x20); memset(IAPU.RAM+0xA0, 0xFF, 0x20); memset(IAPU.RAM+0xE0, 0xFF, 0x20); for(i=1;i<256;i++) { memcpy(IAPU.RAM+(i<<8), IAPU.RAM, 0x100); } ZeroMemory (APU.OutPorts, 4); IAPU.DirectPage = IAPU.RAM; memmove (APU.ExtraRAM, &IAPU.RAM [0xffc0], sizeof (APUROM)); memmove (&IAPU.RAM [0xffc0], APUROM, sizeof (APUROM)); IAPU.PC = IAPU.RAM + IAPU.RAM [0xfffe] + (IAPU.RAM [0xffff] << 8); APU.Cycles = 0; APU.OldCycles = -99999999; // For shapshot compatibility APURegisters.YA.W = 0; APURegisters.X = 0; APURegisters.S = 0xef; APURegisters.P = 0x02; S9xAPUUnpackStatus (); APURegisters.PC = 0; IAPU.APUExecuting = Settings.APUEnabled; #ifdef SPC700_SHUTDOWN IAPU.WaitAddress1 = NULL; IAPU.WaitAddress2 = NULL; IAPU.WaitCounter = 0; #endif IAPU.NextAPUTimerPos = 0; IAPU.APUTimerCounter = 0; APU.ShowROM = TRUE; IAPU.RAM [0xf1] = 0x80; 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); } void S9xSetAPUDSP (uint8 byte) { uint8 reg = IAPU.RAM [0xf2]; static uint8 KeyOn; static uint8 KeyOnPrev; spc_dump_dsp[reg] = byte; 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_rate = env_counter_table[byte & 0x1f]; } 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) { int type; if (byte & mask) { type = SOUND_NOISE; #ifdef DEBUGGER if (Settings.TraceSoundDSP) { if (APU.DSP [reg] & mask) S9xTraceSoundDSP ("%d,", c); else S9xTraceSoundDSP ("%d(on),", c); } #endif } else { type = SOUND_SAMPLE; #ifdef DEBUGGER if (Settings.TraceSoundDSP) { if (APU.DSP [reg] & mask) S9xTraceSoundDSP ("%d(off),", c); } #endif } S9xSetSoundType (c, type); } #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 (spc_is_dumping) { if (byte & ~spc_is_dumping_temp) { APURegisters.PC = IAPU.PC - IAPU.RAM; S9xAPUPackStatus(); #ifndef NGC S9xSPCDump (S9xGetFilenameInc((".spc"), SPC_DIR)); #endif spc_is_dumping = 0; } } 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 } spc_is_dumping_temp = byte; 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) * 8); 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: #ifdef DEBUGGER if (Settings.TraceSoundDSP) S9xTraceSoundDSP ("[%d] %d sample number: %d\n", ICPU.Scanline, reg>>4, byte); #endif 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) { if (S9xSetSoundMode (channel, MODE_ADSR)) S9xSetSoundADSR (channel, adsr1 & 0xf, (adsr1 >> 4) & 7, adsr2 & 0x1f, (adsr2 >> 5) & 7); } else { if ((gain & 0x80) == 0) { if (S9xSetSoundMode (channel, MODE_GAIN)) S9xSetEnvelopeHeight (channel, (gain & 0x7f) << ENV_SHIFT); } else { if (gain & 0x40) { if (S9xSetSoundMode (channel, (gain & 0x20) ? MODE_INCREASE_BENT_LINE : MODE_INCREASE_LINEAR)) S9xSetEnvelopeRate (channel, env_counter_table[gain & 0x1f], ENV_MAX); } else { if (S9xSetSoundMode (channel, (gain & 0x20) ? MODE_DECREASE_EXPONENTIAL : MODE_DECREASE_LINEAR)) S9xSetEnvelopeRate (channel, env_counter_table[gain & 0x1f], 0); } } } } void S9xSetAPUControl (uint8 byte) { //if (byte & 0x40) //printf ("*** Special SPC700 timing enabled\n"); if ((byte & 1) != 0 && !APU.TimerEnabled [0]) { APU.Timer [0] = 0; IAPU.RAM [0xfd] = 0; if ((APU.TimerTarget [0] = IAPU.RAM [0xfa]) == 0) APU.TimerTarget [0] = 0x100; } if ((byte & 2) != 0 && !APU.TimerEnabled [1]) { APU.Timer [1] = 0; IAPU.RAM [0xfe] = 0; if ((APU.TimerTarget [1] = IAPU.RAM [0xfb]) == 0) APU.TimerTarget [1] = 0x100; } if ((byte & 4) != 0 && !APU.TimerEnabled [2]) { APU.Timer [2] = 0; IAPU.RAM [0xff] = 0; if ((APU.TimerTarget [2] = IAPU.RAM [0xfc]) == 0) APU.TimerTarget [2] = 0x100; } APU.TimerEnabled [0] = byte & 1; APU.TimerEnabled [1] = (byte & 2) >> 1; APU.TimerEnabled [2] = (byte & 4) >> 2; if (byte & 0x10) IAPU.RAM [0xF4] = IAPU.RAM [0xF5] = 0; if (byte & 0x20) IAPU.RAM [0xF6] = IAPU.RAM [0xF7] = 0; if (byte & 0x80) { if (!APU.ShowROM) { memmove (&IAPU.RAM [0xffc0], APUROM, sizeof (APUROM)); APU.ShowROM = TRUE; } } else { if (APU.ShowROM) { APU.ShowROM = FALSE; memmove (&IAPU.RAM [0xffc0], APU.ExtraRAM, sizeof (APUROM)); } } IAPU.RAM [0xf1] = byte; } void S9xSetAPUTimer (uint16 Address, uint8 byte) { IAPU.RAM [Address] = byte; switch (Address) { case 0xfa: if ((APU.TimerTarget [0] = IAPU.RAM [0xfa]) == 0) APU.TimerTarget [0] = 0x100; APU.TimerValueWritten [0] = TRUE; break; case 0xfb: if ((APU.TimerTarget [1] = IAPU.RAM [0xfb]) == 0) APU.TimerTarget [1] = 0x100; APU.TimerValueWritten [1] = TRUE; break; case 0xfc: if ((APU.TimerTarget [2] = IAPU.RAM [0xfc]) == 0) APU.TimerTarget [2] = 0x100; APU.TimerValueWritten [2] = TRUE; break; } } void S9xAPUExecute (void) { while ((CPU.Cycles << SNES_APU_ACCURACY) >= IAPU.NextAPUTimerPos) { // catch up the APU timers if (IAPU.APUExecuting) { while (APU.Cycles < IAPU.NextAPUTimerPos) APU_EXECUTE1(); } else APU.Cycles = IAPU.NextAPUTimerPos; IAPU.NextAPUTimerPos += SNES_APUTIMER2_CYCLE_SCALED; if (APU.TimerEnabled [2]) { APU.Timer [2] ++; if (APU.Timer [2] >= APU.TimerTarget [2]) { IAPU.RAM [0xff] = (IAPU.RAM [0xff] + 1) & 0xf; APU.Timer [2] = 0; #ifdef SPC700_SHUTDOWN IAPU.WaitCounter++; IAPU.APUExecuting = TRUE; #endif } } if (++IAPU.APUTimerCounter == 8) { IAPU.APUTimerCounter = 0; if (APU.TimerEnabled [0]) { APU.Timer [0]++; if (APU.Timer [0] >= APU.TimerTarget [0]) { IAPU.RAM [0xfd] = (IAPU.RAM [0xfd] + 1) & 0xf; APU.Timer [0] = 0; #ifdef SPC700_SHUTDOWN IAPU.WaitCounter++; IAPU.APUExecuting = TRUE; #endif } } if (APU.TimerEnabled [1]) { APU.Timer [1]++; if (APU.Timer [1] >= APU.TimerTarget [1]) { IAPU.RAM [0xfe] = (IAPU.RAM [0xfe] + 1) & 0xf; APU.Timer [1] = 0; #ifdef SPC700_SHUTDOWN IAPU.WaitCounter++; IAPU.APUExecuting = TRUE; #endif } } } } // catch up the current cycles if (IAPU.APUExecuting) { while (APU.Cycles < (CPU.Cycles << SNES_APU_ACCURACY)) APU_EXECUTE1(); } else APU.Cycles = (CPU.Cycles << SNES_APU_ACCURACY); } uint8 S9xGetAPUDSP () { uint8 reg = IAPU.RAM [0xf2] & 0x7f; uint8 byte = APU.DSP [reg]; switch (reg) { case APU_KON: break; case APU_KOFF: 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: if(Settings.FakeMuteFix) { // hack that is off by default: fixes Terranigma desync return (0); } else { if (SoundData.channels [reg >> 4].state == SOUND_SILENT) return (0); return (int8) (SoundData.channels [reg >> 4].out_sample >> 8); } 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: return (S9xGetEnvelopeHeight (reg >> 4)); case APU_ENDX: // To fix speech in Magical Drop 2 6/11/00 // APU.DSP [APU_ENDX] = 0; break; default: break; } return (byte); }