From a6dc7abc9b8cc3986eda5a84141da7dc9e4e8f1a Mon Sep 17 00:00:00 2001 From: aliaspider Date: Wed, 29 Oct 2014 05:36:07 +0100 Subject: start moving everything to C --- source/apu.cpp | 772 --------------------------------------------------------- 1 file changed, 772 deletions(-) delete mode 100644 source/apu.cpp (limited to 'source/apu.cpp') diff --git a/source/apu.cpp b/source/apu.cpp deleted file mode 100644 index ee41096..0000000 --- a/source/apu.cpp +++ /dev/null @@ -1,772 +0,0 @@ -/******************************************************************************* - Snes9x - Portable Super Nintendo Entertainment System (TM) emulator. - - (c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com) and - Jerremy Koot (jkoot@snes9x.com) - - (c) Copyright 2001 - 2004 John Weidman (jweidman@slip.net) - - (c) Copyright 2002 - 2004 Brad Jorsch (anomie@users.sourceforge.net), - funkyass (funkyass@spam.shaw.ca), - Joel Yliluoma (http://iki.fi/bisqwit/) - Kris Bleakley (codeviolation@hotmail.com), - Matthew Kendora, - Nach (n-a-c-h@users.sourceforge.net), - Peter Bortas (peter@bortas.org) and - zones (kasumitokoduck@yahoo.com) - - C4 x86 assembler and some C emulation code - (c) Copyright 2000 - 2003 zsKnight (zsknight@zsnes.com), - _Demo_ (_demo_@zsnes.com), and Nach - - C4 C++ code - (c) Copyright 2003 Brad Jorsch - - DSP-1 emulator code - (c) Copyright 1998 - 2004 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson, - John Weidman, neviksti (neviksti@hotmail.com), - Kris Bleakley, Andreas Naive - - DSP-2 emulator code - (c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and - Lord Nightmare (lord_nightmare@users.sourceforge.net - - OBC1 emulator code - (c) Copyright 2001 - 2004 zsKnight, pagefault (pagefault@zsnes.com) and - 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, and Dark Force - - S-DD1 C emulator code - (c) Copyright 2003 Brad Jorsch with research by - Andreas Naive and John Weidman - - S-RTC C emulator code - (c) Copyright 2001 John Weidman - - ST010 C++ emulator code - (c) Copyright 2003 Feather, Kris Bleakley, John Weidman and Matthew Kendora - - Super FX x86 assembler emulator code - (c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault - - Super FX C emulator code - (c) Copyright 1997 - 1999 Ivar, Gary Henderson and John Weidman - - - SH assembler code partly based on x86 assembler code - (c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se) - - - 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 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. -*******************************************************************************/ - -#ifdef __DJGPP -#include -#undef TRUE -#endif - -#include "snes9x.h" -#include "spc700.h" -#include "apu.h" -#include "soundux.h" -#include "cpuexec.h" - -/* For note-triggered SPC dump support */ -#include "snapshot.h" - -extern "C" {const char *S9xGetFilenameInc (const char *);} - -int spc_is_dumping=0; -int spc_is_dumping_temp; -uint8 spc_dump_dsp[0x100]; - -extern int NoiseFreq [32]; - -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; - - 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 converted: Different mallocs [Neb] - // DS2 DMA notes: The APU ROM is not 32-byte aligned [Neb] - memcpy (&IAPU.RAM [0xffc0], APUROM, sizeof (APUROM)); - // memmove converted: Different mallocs [Neb] - // DS2 DMA notes: The APU ROM is not 32-byte aligned [Neb] - memcpy (APU.ExtraRAM, APUROM, sizeof (APUROM)); - IAPU.PC = IAPU.RAM + IAPU.RAM [0xfffe] + (IAPU.RAM [0xffff] << 8); - APU.Cycles = 0; - IAPU.Registers.YA.W = 0; - IAPU.Registers.X = 0; - IAPU.Registers.S = 0xff; - IAPU.Registers.P = 0; - S9xAPUUnpackStatus (); - IAPU.Registers.PC = 0; - IAPU.APUExecuting = Settings.APUEnabled; -#ifdef SPC700_SHUTDOWN - IAPU.WaitAddress1 = NULL; - IAPU.WaitAddress2 = NULL; - IAPU.WaitCounter = 0; -#endif - 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; - int i; - - 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); - - // Kill sound - S9xResetSound (FALSE); - } - else - { - S9xSetEchoWriteEnable (!(byte & APU_ECHO_DISABLED)); - if (byte & APU_MUTE) - { - 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]) - { - uint8 mask = 1; - for (int c = 0; c < 8; c++, mask <<= 1) - { - int type; - - if (byte & mask) - type = SOUND_NOISE; - else - type = SOUND_SAMPLE; - - S9xSetSoundType (c, type); - } - } - break; - case APU_MVOL_LEFT: - if (byte != APU.DSP [APU_MVOL_LEFT]) - { - S9xSetMasterVolume ((signed char) byte, - (signed char) APU.DSP [APU_MVOL_RIGHT]); - } - break; - case APU_MVOL_RIGHT: - if (byte != APU.DSP [APU_MVOL_RIGHT]) - { - S9xSetMasterVolume ((signed char) APU.DSP [APU_MVOL_LEFT], - (signed char) byte); - } - break; - case APU_EVOL_LEFT: - if (byte != APU.DSP [APU_EVOL_LEFT]) - { - S9xSetEchoVolume ((signed char) byte, - (signed char) APU.DSP [APU_EVOL_RIGHT]); - } - break; - case APU_EVOL_RIGHT: - if (byte != APU.DSP [APU_EVOL_RIGHT]) - { - S9xSetEchoVolume ((signed char) APU.DSP [APU_EVOL_LEFT], - (signed char) byte); - } - break; - case APU_ENDX: - byte = 0; - break; - - case APU_KOFF: - // if (byte) - { - uint8 mask = 1; - for (int c = 0; c < 8; c++, mask <<= 1) - { - if ((byte & mask) != 0) - { - 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); - } - } - } - //KeyOnPrev=0; - APU.DSP [APU_KOFF] = byte; - return; - case APU_KON: - if (spc_is_dumping) - { - if (byte & ~spc_is_dumping_temp) - { - IAPU.Registers.PC = IAPU.PC - IAPU.RAM; - S9xAPUPackStatus(); - S9xSPCDump (".spc"); - spc_is_dumping = 0; - } - } - if (byte) - { - uint8 mask = 1; - for (int c = 0; c < 8; c++, mask <<= 1) - { - if ((byte & mask) != 0) - { - // 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; - } - } - } - 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]) - { - 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]) - { - 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: - 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: - 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]) - { - S9xSetSoundSample (reg >> 4, byte); - } - 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]) - { - { - 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]) - { - { - 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]) - { - { - 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: - break; - - case APU_PMON: - if (byte != APU.DSP [APU_PMON]) - { - S9xSetFrequencyModulationEnable (byte); - } - break; - - case APU_EON: - if (byte != APU.DSP [APU_EON]) - { - 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 - static unsigned long AttackRate [16] = { - 4100, 2600, 1500, 1000, 640, 380, 260, 160, - 96, 64, 40, 24, 16, 10, 6, 1 - }; - static unsigned long DecayRate [8] = { - 1200, 740, 440, 290, 180, 110, 74, 37 - }; - static unsigned long SustainRate [32] = { - ~0, 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 - }; - // 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)) - { - // Hack for ROMs that use a very short attack rate, key on a - // channel, then switch to decay mode. e.g. Final Fantasy II. - - int attack = AttackRate [adsr1 & 0xf]; - - if (attack == 1 && (!Settings.SoundSync -#ifdef __WIN32__ - || Settings.SoundDriver != WIN_SNES9X_DIRECT_SOUND_DRIVER -#endif - )) - attack = 0; - - S9xSetSoundADSR (channel, attack, - DecayRate [(adsr1 >> 4) & 7], - SustainRate [adsr2 & 0x1f], - (adsr2 >> 5) & 7, 8); - } - } - else - { - // Gain mode - if ((gain & 0x80) == 0) - { - if (S9xSetSoundMode (channel, MODE_GAIN)) - { - S9xSetEnvelopeRate (channel, 0, 0, gain & 0x7f); - S9xSetEnvelopeHeight (channel, gain & 0x7f); - } - } - else - { - static unsigned long IncreaseRate [32] = { - ~0, 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 - }; - static unsigned long DecreaseRateExp [32] = { - ~0, 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 - }; - if (gain & 0x40) - { - // Increase mode - if (S9xSetSoundMode (channel, (gain & 0x20) ? -MODE_INCREASE_BENT_LINE : - MODE_INCREASE_LINEAR)) - { - S9xSetEnvelopeRate (channel, IncreaseRate [gain & 0x1f], - 1, 127); - } - } - else - { - uint32 rate = (gain & 0x20) ? DecreaseRateExp [gain & 0x1f] / 2 : - IncreaseRate [gain & 0x1f]; - int mode = (gain & 0x20) ? MODE_DECREASE_EXPONENTIAL - : MODE_DECREASE_LINEAR; - - if (S9xSetSoundMode (channel, mode)) - S9xSetEnvelopeRate (channel, rate, -1, 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 converted: Different mallocs [Neb] - // DS2 DMA notes: The APU ROM is not 32-byte aligned [Neb] - memcpy (&IAPU.RAM [0xffc0], APUROM, sizeof (APUROM)); - APU.ShowROM = TRUE; - } - } - else - { - if (APU.ShowROM) - { - APU.ShowROM = FALSE; - // memmove converted: Different mallocs [Neb] - // DS2 DMA notes: The APU ROM is not 32-byte aligned [Neb] - memcpy (&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; - } -} - -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 (SoundData.channels [reg >> 4].state == SOUND_SILENT) - return (0); - return ((SoundData.channels [reg >> 4].sample >> 8) | - (SoundData.channels [reg >> 4].sample & 0xff)); - - 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 ((uint8) 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); -} - -- cgit v1.2.3