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+/*******************************************************************************
+  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.
+*******************************************************************************/
+
+#ifndef _apu_h_
+#define _apu_h_
+
+#include "spc700.h"
+
+struct SIAPU
+{
+    uint8  *PC;
+    uint8  *RAM;
+    uint8  *DirectPage;
+    bool8  APUExecuting;
+    uint8  Bit;
+    uint32 Address;
+    uint8  *WaitAddress1;
+    uint8  *WaitAddress2;
+    uint32 WaitCounter;
+    uint8  *ShadowRAM;
+    uint8  *CachedSamples;
+    uint8  _Carry;
+    uint8  _Zero;
+    uint8  _Overflow;
+    uint32 TimerErrorCounter;
+    uint32 Scanline;
+    int32  OneCycle;
+    int32  TwoCycles;
+};
+
+struct SAPU
+{
+    int32  Cycles;
+    bool8  ShowROM;
+    uint8  Flags;
+    uint8  KeyedChannels;
+    uint8  OutPorts [4];
+    uint8  DSP [0x80];
+    uint8  ExtraRAM [64];
+    uint16 Timer [3];
+    uint16 TimerTarget [3];
+    bool8  TimerEnabled [3];
+    bool8  TimerValueWritten [3];
+};
+
+EXTERN_C struct SAPU APU;
+EXTERN_C struct SIAPU IAPU;
+extern int spc_is_dumping;
+extern int spc_is_dumping_temp;
+extern uint8 spc_dump_dsp[0x100];
+STATIC inline void S9xAPUUnpackStatus()
+{
+    IAPU._Zero = ((APURegisters.P & Zero) == 0) | (APURegisters.P & Negative);
+    IAPU._Carry = (APURegisters.P & Carry);
+    IAPU._Overflow = (APURegisters.P & Overflow) >> 6;
+}
+
+STATIC inline void S9xAPUPackStatus()
+{
+    APURegisters.P &= ~(Zero | Negative | Carry | Overflow);
+    APURegisters.P |= IAPU._Carry | ((IAPU._Zero == 0) << 1) |
+		      (IAPU._Zero & 0x80) | (IAPU._Overflow << 6);
+}
+
+START_EXTERN_C
+void S9xResetAPU (void);
+bool8 S9xInitAPU ();
+void S9xDeinitAPU ();
+void S9xDecacheSamples ();
+int S9xTraceAPU ();
+int S9xAPUOPrint (char *buffer, uint16 Address);
+void S9xSetAPUControl (uint8 byte);
+void S9xSetAPUDSP (uint8 byte);
+uint8 S9xGetAPUDSP ();
+void S9xSetAPUTimer (uint16 Address, uint8 byte);
+bool8 S9xInitSound (int quality, bool8 stereo, int buffer_size);
+void S9xOpenCloseSoundTracingFile (bool8);
+void S9xPrintAPUState ();
+extern int32 S9xAPUCycles [256];	// Scaled cycle lengths
+extern int32 S9xAPUCycleLengths [256];	// Raw data.
+extern void (*S9xApuOpcodes [256]) (void);
+END_EXTERN_C
+
+
+#define APU_VOL_LEFT 0x00
+#define APU_VOL_RIGHT 0x01
+#define APU_P_LOW 0x02
+#define APU_P_HIGH 0x03
+#define APU_SRCN 0x04
+#define APU_ADSR1 0x05
+#define APU_ADSR2 0x06
+#define APU_GAIN 0x07
+#define APU_ENVX 0x08
+#define APU_OUTX 0x09
+
+#define APU_MVOL_LEFT 0x0c
+#define APU_MVOL_RIGHT 0x1c
+#define APU_EVOL_LEFT 0x2c
+#define APU_EVOL_RIGHT 0x3c
+#define APU_KON 0x4c
+#define APU_KOFF 0x5c
+#define APU_FLG 0x6c
+#define APU_ENDX 0x7c
+
+#define APU_EFB 0x0d
+#define APU_PMON 0x2d
+#define APU_NON 0x3d
+#define APU_EON 0x4d
+#define APU_DIR 0x5d
+#define APU_ESA 0x6d
+#define APU_EDL 0x7d
+
+#define APU_C0 0x0f
+#define APU_C1 0x1f
+#define APU_C2 0x2f
+#define APU_C3 0x3f
+#define APU_C4 0x4f
+#define APU_C5 0x5f
+#define APU_C6 0x6f
+#define APU_C7 0x7f
+
+#define APU_SOFT_RESET 0x80
+#define APU_MUTE 0x40
+#define APU_ECHO_DISABLED 0x20
+
+#define FREQUENCY_MASK 0x3fff
+#endif
+