text: /*******************************************************************************
    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 _65c816_h_
  #define _65c816_h_
  
  #define AL A.B.l
  #define AH A.B.h
  #define XL X.B.l
  #define XH X.B.h
  #define YL Y.B.l
  #define YH Y.B.h
  #define SL S.B.l
  #define SH S.B.h
  #define DL D.B.l
  #define DH D.B.h
  #define PL P.B.l
  #define PH P.B.h
  
  #define Carry       1
  #define Zero        2
  #define IRQ         4
  #define Decimal     8
  #define IndexFlag  16
  #define MemoryFlag 32
  #define Overflow   64
  #define Negative  128
  #define Emulation 256
  
  #define ClearCarry() (ICPU._Carry = 0)
  #define SetCarry() (ICPU._Carry = 1)
  #define SetZero() (ICPU._Zero = 0)
  #define ClearZero() (ICPU._Zero = 1)
  #define SetIRQ() (Registers.PL |= IRQ)
  #define ClearIRQ() (Registers.PL &= ~IRQ)
  #define SetDecimal() (Registers.PL |= Decimal)
  #define ClearDecimal() (Registers.PL &= ~Decimal)
  #define SetIndex() (Registers.PL |= IndexFlag)
  #define ClearIndex() (Registers.PL &= ~IndexFlag)
  #define SetMemory() (Registers.PL |= MemoryFlag)
  #define ClearMemory() (Registers.PL &= ~MemoryFlag)
  #define SetOverflow() (ICPU._Overflow = 1)
  #define ClearOverflow() (ICPU._Overflow = 0)
  #define SetNegative() (ICPU._Negative = 0x80)
  #define ClearNegative() (ICPU._Negative = 0)
  
  #define CheckZero() (ICPU._Zero == 0)
  #define CheckCarry() (ICPU._Carry)
  #define CheckIRQ() (Registers.PL & IRQ)
  #define CheckDecimal() (Registers.PL & Decimal)
  #define CheckIndex() (Registers.PL & IndexFlag)
  #define CheckMemory() (Registers.PL & MemoryFlag)
  #define CheckOverflow() (ICPU._Overflow)
  #define CheckNegative() (ICPU._Negative & 0x80)
  #define CheckEmulation() (Registers.P.W & Emulation)
  
  #define ClearFlags(f) (Registers.P.W &= ~(f))
  #define SetFlags(f)   (Registers.P.W |=  (f))
  #define CheckFlag(f)  (Registers.PL & (f))
  
  typedef union
  {
  #ifdef LSB_FIRST
      struct { uint8 l,h; } B;
  #else
      struct { uint8 h,l; } B;
  #endif
      uint16 W;
  } pair;
  
  struct SRegisters{
      uint8  PB;
      uint8  DB;
      pair   P;
      pair   A;
      pair   D;
      pair   S;
      pair   X;
      pair   Y;
      uint16 PC;
  };
  
  EXTERN_C struct SRegisters Registers;
  
  #endif
  
  