From d8a8530bc83925c1c10ad38457603199a4ff0e57 Mon Sep 17 00:00:00 2001 From: bladeoner Date: Sun, 4 Mar 2018 17:00:22 +0100 Subject: [PATCH] Properly report MSU-1 revision in the status register --- source/snes9x/msu1.cpp | 598 +++++++++++++++++++++++++++++++++++++++++ source/snes9x/msu1.h | 243 +++++++++++++++++ 2 files changed, 841 insertions(+) create mode 100644 source/snes9x/msu1.cpp create mode 100644 source/snes9x/msu1.h diff --git a/source/snes9x/msu1.cpp b/source/snes9x/msu1.cpp new file mode 100644 index 0000000..bd8911b --- /dev/null +++ b/source/snes9x/msu1.cpp @@ -0,0 +1,598 @@ +/*********************************************************************************** + 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 - 2010 Brad Jorsch (anomie@users.sourceforge.net), + Nach (n-a-c-h@users.sourceforge.net), + + (c) Copyright 2002 - 2011 zones (kasumitokoduck@yahoo.com) + + (c) Copyright 2006 - 2007 nitsuja + + (c) Copyright 2009 - 2016 BearOso, + OV2 + + (c) Copyright 2011 - 2016 Hans-Kristian Arntzen, + Daniel De Matteis + (Under no circumstances will commercial rights be given) + + + 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 used in 1.39-1.51 + (c) Copyright 2002 Matthew Kendora with research by + zsKnight, + John Weidman, + Dark Force + + SPC7110 and RTC C++ emulator code used in 1.52+ + (c) Copyright 2009 byuu, + neviksti + + 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 emulator code used in 1.5-1.51 + (c) Copyright 1998 - 2003 Brad Martin + (c) Copyright 1998 - 2006 Charles Bilyue' + + Sound emulator code used in 1.52+ + (c) Copyright 2004 - 2007 Shay Green (gblargg@gmail.com) + + S-SMP emulator code used in 1.54+ + (c) Copyright 2016 byuu + + 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) + + NTSC filter + (c) Copyright 2006 - 2007 Shay Green + + GTK+ GUI code + (c) Copyright 2004 - 2016 BearOso + + Win32 GUI code + (c) Copyright 2003 - 2006 blip, + funkyass, + Matthew Kendora, + Nach, + nitsuja + (c) Copyright 2009 - 2016 OV2 + + Mac OS GUI code + (c) Copyright 1998 - 2001 John Stiles + (c) Copyright 2001 - 2011 zones + + Libretro port + (c) Copyright 2011 - 2016 Hans-Kristian Arntzen, + Daniel De Matteis + (Under no circumstances will commercial rights be given) + + MSU-1 code + (c) Copyright 2016 qwertymodo + + + 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. + ***********************************************************************************/ + +#include "msu1.h" +#include "display.h" +#include "filebrowser.h" +#include "memmap.h" +#include "snes9xgx.h" +#include "apu/bapu/dsp/blargg_endian.h" + +STREAM dataStream = NULL; +STREAM audioStream = NULL; +uint32 audioLoopPos; +size_t partial_samples; + +// Sample buffer +int16 *bufPos, *bufBegin, *bufEnd; + +#ifdef UNZIP_SUPPORT +static int unzFindExtension(unzFile &file, const char *ext, bool restart = TRUE, bool print = TRUE, bool allowExact = FALSE) +{ + unz_file_info info; + int port, l = strlen(ext), e = allowExact ? 0 : 1; + + if (restart) + port = unzGoToFirstFile(file); + else + port = unzGoToNextFile(file); + + while (port == UNZ_OK) + { + int len; + char name[132]; + + unzGetCurrentFileInfo(file, &info, name, 128, NULL, 0, NULL, 0); + len = strlen(name); + + if (len >= l + e && strcasecmp(name + len - l, ext) == 0 && unzOpenCurrentFile(file) == UNZ_OK) + { + if (print) + printf("Using msu file %s", name); + + return (port); + } + + port = unzGoToNextFile(file); + } + + return (port); +} +#endif + +STREAM S9xMSU1OpenFile(char *msu_ext) +{ + char filename[MAXPATHLEN]; + sprintf(filename, "%s%s%s", Memory.ROMFilePath, Memory.ROMFilename, msu_ext); + + STREAM file = OPEN_STREAM(filename, "rb"); + if (file) + printf("Using msu file %s.\n", filename); + +#ifdef UNZIP_SUPPORT + // look for msu file in .msu1 (Mercurial Magic pack) if not found in rom dir + if (!file) + { + char zip_filename[MAXPATHLEN]; + sprintf(zip_filename, "%s%s.msu1", Memory.ROMFilePath, Memory.ROMFilename); + unzFile unzFile = unzOpen(zip_filename); + + if (unzFile) + { + int port = unzFindExtension(unzFile, msu_ext, true, true, true); + if (port == UNZ_OK) + { + printf(" in %s.\n", zip_filename); + file = new unzStream(unzFile); + } + else + unzCloseCurrentFile(unzFile); + } + } +#endif + + if(!file) + printf("Unable to find msu file %s.\n", filename); + + return file; +} + +bool AudioOpen() +{ + MSU1.MSU1_STATUS |= AudioError; + + if (audioStream) + { + CLOSE_STREAM(audioStream); + audioStream = NULL; + } + + char ext[_MAX_EXT]; + snprintf(ext, _MAX_EXT, "-%d.pcm", MSU1.MSU1_CURRENT_TRACK); + + audioStream = S9xMSU1OpenFile(ext); + if (audioStream) + { + if (GETC_STREAM(audioStream) != 'M') + return false; + if (GETC_STREAM(audioStream) != 'S') + return false; + if (GETC_STREAM(audioStream) != 'U') + return false; + if (GETC_STREAM(audioStream) != '1') + return false; + + READ_STREAM((char *)&audioLoopPos, 4, audioStream); + audioLoopPos = GET_LE32(&audioLoopPos); + audioLoopPos <<= 2; + audioLoopPos += 8; + + MSU1.MSU1_STATUS &= ~AudioError; + return true; + } + + return false; +} + +bool DataOpen() +{ + if (dataStream) + { + CLOSE_STREAM(dataStream); + dataStream = NULL; + } + + dataStream = S9xMSU1OpenFile(".msu"); + + if(!dataStream) + dataStream = S9xMSU1OpenFile("msu1.rom"); + + return dataStream != NULL; +} + +void S9xResetMSU(void) +{ + MSU1.MSU1_STATUS = 0; + MSU1.MSU1_DATA_SEEK = 0; + MSU1.MSU1_DATA_POS = 0; + MSU1.MSU1_TRACK_SEEK = 0; + MSU1.MSU1_CURRENT_TRACK = 0; + MSU1.MSU1_RESUME_TRACK = 0; + MSU1.MSU1_VOLUME = 0; + MSU1.MSU1_CONTROL = 0; + MSU1.MSU1_AUDIO_POS = 0; + MSU1.MSU1_RESUME_POS = 0; + + + bufPos = 0; + bufBegin = 0; + bufEnd = 0; + + partial_samples = 0; + + if (dataStream) + { + CLOSE_STREAM(dataStream); + dataStream = NULL; + } + + if (audioStream) + { + CLOSE_STREAM(audioStream); + audioStream = NULL; + } + + Settings.MSU1 = S9xMSU1ROMExists(); +} + +void S9xMSU1Init(void) +{ + DataOpen(); +} + +bool S9xMSU1ROMExists(void) +{ + STREAM s = S9xMSU1OpenFile(".msu"); + if (s) + { + CLOSE_STREAM(s); + return true; + } +#ifdef UNZIP_SUPPORT + char fname[MAXPATHLEN]; + sprintf(fname, "%s%s.msu1", Memory.ROMFilePath, Memory.ROMFilename); + unzFile unzFile = unzOpen(fname); + + if (unzFile) + { + unzCloseCurrentFile(unzFile); + return true; + } +#endif + return false; +} + +void S9xMSU1Generate(size_t sample_count) +{ + partial_samples += 4410 * sample_count; + + while (((uintptr_t)bufPos < (uintptr_t)bufEnd) && partial_samples > 3204) + { + if (MSU1.MSU1_STATUS & AudioPlaying && audioStream) + { + int16 sample; + int bytes_read = READ_STREAM((char *)&sample, 2, audioStream); + if (bytes_read == 2) + { + sample = (int16)((double)(int16)GET_LE16(&sample) * (double)MSU1.MSU1_VOLUME / 255.0); + + *(bufPos++) = sample; + MSU1.MSU1_AUDIO_POS += 2; + partial_samples -= 3204; + } + else + if (bytes_read >= 0) + { + sample = (int16)((double)(int16)GET_LE16(&sample) * (double)MSU1.MSU1_VOLUME / 255.0); + + *(bufPos++) = sample; + MSU1.MSU1_AUDIO_POS += 2; + partial_samples -= 3204; + + if (MSU1.MSU1_STATUS & AudioRepeating) + { + MSU1.MSU1_AUDIO_POS = audioLoopPos; + REVERT_STREAM(audioStream, MSU1.MSU1_AUDIO_POS, 0); + } + else + { + MSU1.MSU1_STATUS &= ~(AudioPlaying | AudioRepeating); + REVERT_STREAM(audioStream, 8, 0); + } + } + else + { + MSU1.MSU1_STATUS &= ~(AudioPlaying | AudioRepeating); + } + } + else + { + MSU1.MSU1_STATUS &= ~(AudioPlaying | AudioRepeating); + partial_samples -= 3204; + *(bufPos++) = 0; + } + } +} + + +uint8 S9xMSU1ReadPort(uint8 port) +{ + switch (port) + { + case 0: + return MSU1.MSU1_STATUS; + case 1: + { + if (MSU1.MSU1_STATUS & DataBusy) + return 0; + if (!dataStream) + return 0; + int data = GETC_STREAM(dataStream); + if (data >= 0) + { + MSU1.MSU1_DATA_POS++; + return data; + } + return 0; + } + case 2: + return 'S'; + case 3: + return '-'; + case 4: + return 'M'; + case 5: + return 'S'; + case 6: + return 'U'; + case 7: + return '1'; + } + + return 0; +} + + +void S9xMSU1WritePort(uint8 port, uint8 byte) +{ + switch (port) + { + case 0: + MSU1.MSU1_DATA_SEEK &= 0xFFFFFF00; + MSU1.MSU1_DATA_SEEK |= byte << 0; + break; + case 1: + MSU1.MSU1_DATA_SEEK &= 0xFFFF00FF; + MSU1.MSU1_DATA_SEEK |= byte << 8; + break; + case 2: + MSU1.MSU1_DATA_SEEK &= 0xFF00FFFF; + MSU1.MSU1_DATA_SEEK |= byte << 16; + break; + case 3: + MSU1.MSU1_DATA_SEEK &= 0x00FFFFFF; + MSU1.MSU1_DATA_SEEK |= byte << 24; + MSU1.MSU1_DATA_POS = MSU1.MSU1_DATA_SEEK; + if (dataStream) + { + REVERT_STREAM(dataStream, MSU1.MSU1_DATA_POS, 0); + } + break; + case 4: + MSU1.MSU1_TRACK_SEEK &= 0xFF00; + MSU1.MSU1_TRACK_SEEK |= byte; + break; + case 5: + MSU1.MSU1_TRACK_SEEK &= 0x00FF; + MSU1.MSU1_TRACK_SEEK |= (byte << 8); + MSU1.MSU1_CURRENT_TRACK = MSU1.MSU1_TRACK_SEEK; + + MSU1.MSU1_STATUS &= ~AudioPlaying; + MSU1.MSU1_STATUS &= ~AudioRepeating; + + if (AudioOpen()) + { + if (MSU1.MSU1_CURRENT_TRACK == MSU1.MSU1_RESUME_TRACK) + { + MSU1.MSU1_AUDIO_POS = MSU1.MSU1_RESUME_POS; + MSU1.MSU1_RESUME_POS = 0; + MSU1.MSU1_RESUME_TRACK = ~0; + } + else + { + MSU1.MSU1_AUDIO_POS = 8; + } + + REVERT_STREAM(audioStream, MSU1.MSU1_AUDIO_POS, 0); + } + break; + case 6: + MSU1.MSU1_VOLUME = byte; + break; + case 7: + if (MSU1.MSU1_STATUS & (AudioBusy | AudioError)) + break; + + MSU1.MSU1_STATUS = (MSU1.MSU1_STATUS & ~0x30) | ((byte & 0x03) << 4); + + if ((byte & (Play | Resume)) == Resume) + { + MSU1.MSU1_RESUME_TRACK = MSU1.MSU1_CURRENT_TRACK; + MSU1.MSU1_RESUME_POS = MSU1.MSU1_AUDIO_POS; + } + break; + } +} + +size_t S9xMSU1Samples(void) +{ + return bufPos - bufBegin; +} + +void S9xMSU1SetOutput(int16 * out, size_t size) +{ + bufPos = bufBegin = out; + bufEnd = out + size; +} + +void S9xMSU1PostLoadState(void) +{ + if (DataOpen()) + { + REVERT_STREAM(dataStream, MSU1.MSU1_DATA_POS, 0); + } + + if (MSU1.MSU1_STATUS & AudioPlaying) + { + if (AudioOpen()) + { + REVERT_STREAM(audioStream, 4, 0); + READ_STREAM((char *)&audioLoopPos, 4, audioStream); + audioLoopPos = GET_LE32(&audioLoopPos); + audioLoopPos <<= 2; + audioLoopPos += 8; + + REVERT_STREAM(audioStream, MSU1.MSU1_AUDIO_POS, 0); + } + else + { + MSU1.MSU1_STATUS &= ~(AudioPlaying | AudioRepeating); + MSU1.MSU1_STATUS |= AudioError; + } + } + + bufPos = 0; + bufBegin = 0; + bufEnd = 0; + + partial_samples = 0; +} diff --git a/source/snes9x/msu1.h b/source/snes9x/msu1.h new file mode 100644 index 0000000..a0ff8b2 --- /dev/null +++ b/source/snes9x/msu1.h @@ -0,0 +1,243 @@ +/*********************************************************************************** + 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 - 2010 Brad Jorsch (anomie@users.sourceforge.net), + Nach (n-a-c-h@users.sourceforge.net), + + (c) Copyright 2002 - 2011 zones (kasumitokoduck@yahoo.com) + + (c) Copyright 2006 - 2007 nitsuja + + (c) Copyright 2009 - 2016 BearOso, + OV2 + + (c) Copyright 2011 - 2016 Hans-Kristian Arntzen, + Daniel De Matteis + (Under no circumstances will commercial rights be given) + + + 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 used in 1.39-1.51 + (c) Copyright 2002 Matthew Kendora with research by + zsKnight, + John Weidman, + Dark Force + + SPC7110 and RTC C++ emulator code used in 1.52+ + (c) Copyright 2009 byuu, + neviksti + + 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 emulator code used in 1.5-1.51 + (c) Copyright 1998 - 2003 Brad Martin + (c) Copyright 1998 - 2006 Charles Bilyue' + + Sound emulator code used in 1.52+ + (c) Copyright 2004 - 2007 Shay Green (gblargg@gmail.com) + + S-SMP emulator code used in 1.54+ + (c) Copyright 2016 byuu + + 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) + + NTSC filter + (c) Copyright 2006 - 2007 Shay Green + + GTK+ GUI code + (c) Copyright 2004 - 2016 BearOso + + Win32 GUI code + (c) Copyright 2003 - 2006 blip, + funkyass, + Matthew Kendora, + Nach, + nitsuja + (c) Copyright 2009 - 2016 OV2 + + Mac OS GUI code + (c) Copyright 1998 - 2001 John Stiles + (c) Copyright 2001 - 2011 zones + + Libretro port + (c) Copyright 2011 - 2016 Hans-Kristian Arntzen, + Daniel De Matteis + (Under no circumstances will commercial rights be given) + + MSU-1 code + (c) Copyright 2016 qwertymodo + + + 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. + ***********************************************************************************/ + +#ifndef _MSU1_H_ +#define _MSU1_H_ +#include "snes9x.h" +#include +#include + +struct SMSU1 +{ + uint8 MSU1_STATUS; + uint32 MSU1_DATA_SEEK; + uint32 MSU1_DATA_POS; + uint16 MSU1_TRACK_SEEK; + uint16 MSU1_CURRENT_TRACK; + uint32 MSU1_RESUME_TRACK; + uint8 MSU1_VOLUME; + uint8 MSU1_CONTROL; + uint32 MSU1_AUDIO_POS; + uint32 MSU1_RESUME_POS; +}; + +enum SMSU1_FLAG { + Revision = 0x02, //max: 0x07 + AudioResume = 0x04, + AudioError = 0x08, + AudioPlaying = 0x10, + AudioRepeating = 0x20, + AudioBusy = 0x40, + DataBusy = 0x80 +}; + +enum SMSU1_CMD { + Play = 0x01, + Repeat = 0x02, + Resume = 0x04 +}; + +extern struct SMSU1 MSU1; + +void S9xResetMSU(void); +void S9xMSU1Init(void); +bool S9xMSU1ROMExists(void); +STREAM S9xMSU1OpenFile(char *msu_ext); +void S9xMSU1Init(void); +void S9xMSU1Generate(size_t sample_count); +uint8 S9xMSU1ReadPort(uint8 port); +void S9xMSU1WritePort(uint8 port, uint8 byte); +size_t S9xMSU1Samples(void); +void S9xMSU1SetOutput(int16 *out, size_t size); +void S9xMSU1PostLoadState(void); + +#endif