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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 _CPUEXEC_H_
+#define _CPUEXEC_H_
+#include "ppu.h"
+#include "memmap.h"
+#include "65c816.h"
+
+#define DO_HBLANK_CHECK() \
+    if (CPU.Cycles >= CPU.NextEvent) \
+	S9xDoHBlankProcessing ();
+
+struct SOpcodes {
+#ifdef __WIN32__
+	void (__cdecl *S9xOpcode)( void);
+#else
+	void (*S9xOpcode)( void);
+#endif
+};
+
+struct SICPU
+{
+    uint8  *Speed;
+    struct SOpcodes *S9xOpcodes;
+    uint8  _Carry;
+    uint8  _Zero;
+    uint8  _Negative;
+    uint8  _Overflow;
+    bool8  CPUExecuting;
+    uint32 ShiftedPB;
+    uint32 ShiftedDB;
+    uint32 Frame;
+    uint32 Scanline;
+    uint32 FrameAdvanceCount;
+};
+
+START_EXTERN_C
+void S9xMainLoop (void);
+void S9xReset (void);
+void S9xSoftReset (void);
+void S9xDoHBlankProcessing ();
+void S9xClearIRQ (uint32);
+void S9xSetIRQ (uint32);
+
+extern struct SOpcodes S9xOpcodesE1 [256];
+extern struct SOpcodes S9xOpcodesM1X1 [256];
+extern struct SOpcodes S9xOpcodesM1X0 [256];
+extern struct SOpcodes S9xOpcodesM0X1 [256];
+extern struct SOpcodes S9xOpcodesM0X0 [256];
+
+extern struct SICPU ICPU;
+END_EXTERN_C
+
+STATIC inline void S9xUnpackStatus()
+{
+    ICPU._Zero = (Registers.PL & Zero) == 0;
+    ICPU._Negative = (Registers.PL & Negative);
+    ICPU._Carry = (Registers.PL & Carry);
+    ICPU._Overflow = (Registers.PL & Overflow) >> 6;
+}
+
+STATIC inline void S9xPackStatus()
+{
+    Registers.PL &= ~(Zero | Negative | Carry | Overflow);
+    Registers.PL |= ICPU._Carry | ((ICPU._Zero == 0) << 1) |
+		    (ICPU._Negative & 0x80) | (ICPU._Overflow << 6);
+}
+
+STATIC inline void CLEAR_IRQ_SOURCE (uint32 M)
+{
+    CPU.IRQActive &= ~M;
+    if (!CPU.IRQActive)
+	CPU.Flags &= ~IRQ_PENDING_FLAG;
+}
+	
+STATIC inline void S9xFixCycles ()
+{
+    if (CheckEmulation ())
+    {
+	ICPU.S9xOpcodes = S9xOpcodesE1;
+    }
+    else
+    if (CheckMemory ())
+    {
+	if (CheckIndex ())
+	{
+	    ICPU.S9xOpcodes = S9xOpcodesM1X1;
+	}
+	else
+	{
+	    ICPU.S9xOpcodes = S9xOpcodesM1X0;
+	}
+    }
+    else
+    {
+	if (CheckIndex ())
+	{
+	    ICPU.S9xOpcodes = S9xOpcodesM0X1;
+	}
+	else
+	{
+	    ICPU.S9xOpcodes = S9xOpcodesM0X0;
+	}
+    }
+}
+
+STATIC inline void S9xReschedule ()
+{
+    uint8 which;
+    long max;
+    
+    if (CPU.WhichEvent == HBLANK_START_EVENT ||
+	CPU.WhichEvent == HTIMER_AFTER_EVENT)
+    {
+	which = HBLANK_END_EVENT;
+	max = Settings.H_Max;
+    }
+    else
+    {
+	which = HBLANK_START_EVENT;
+	max = Settings.HBlankStart;
+    }
+
+    if (PPU.HTimerEnabled &&
+        (long) PPU.HTimerPosition < max &&
+	(long) PPU.HTimerPosition > CPU.NextEvent &&
+	(!PPU.VTimerEnabled ||
+	 (PPU.VTimerEnabled && CPU.V_Counter == PPU.IRQVBeamPos)))
+    {
+	which = (long) PPU.HTimerPosition < Settings.HBlankStart ?
+			HTIMER_BEFORE_EVENT : HTIMER_AFTER_EVENT;
+	max = PPU.HTimerPosition;
+    }
+    CPU.NextEvent = max;
+    CPU.WhichEvent = which;
+}
+
+#endif
+