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/*
* Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
*
* (c) Copyright 1996 - 2001 Gary Henderson (gary.henderson@ntlworld.com) and
* Jerremy Koot (jkoot@snes9x.com)
*
* Super FX C emulator code
* (c) Copyright 1997 - 1999 Ivar (ivar@snes9x.com) and
* Gary Henderson.
* Super FX assembler emulator code (c) Copyright 1998 zsKnight and _Demo_.
*
* DSP1 emulator code (c) Copyright 1998 Ivar, _Demo_ and Gary Henderson.
* C4 asm and some C emulation code (c) Copyright 2000 zsKnight and _Demo_.
* C4 C code (c) Copyright 2001 Gary Henderson (gary.henderson@ntlworld.com).
*
* DOS port code 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 "snes9x.h"
#include "65c816.h"
#define DO_HBLANK_CHECK() \
if (CPU.Cycles >= CPU.NextEvent) \
S9xDoHBlankProcessing ();
typedef struct
{
#ifdef __WIN32__
void (__cdecl* S9xOpcode)(void);
#else
void (*S9xOpcode)(void);
#endif
} SOpcodes;
typedef struct
{
uint8* Speed;
SOpcodes* S9xOpcodes;
uint8 _Carry;
uint8 _Zero;
uint8 _Negative;
uint8 _Overflow;
bool8 CPUExecuting;
uint32 ShiftedPB;
uint32 ShiftedDB;
uint32 Frame;
uint32 Scanline;
uint32 FrameAdvanceCount;
} SICPU;
START_EXTERN_C
void S9xMainLoop(void);
void S9xReset(void);
void S9xDoHBlankProcessing();
void S9xClearIRQ(uint32);
void S9xSetIRQ(uint32);
extern SOpcodes S9xOpcodesM1X1 [256];
extern SOpcodes S9xOpcodesM1X0 [256];
extern SOpcodes S9xOpcodesM0X1 [256];
extern SOpcodes S9xOpcodesM0X0 [256];
#ifndef VAR_CYCLES
extern uint8 S9xE1M1X1 [256];
extern uint8 S9xE0M1X0 [256];
extern uint8 S9xE0M1X1 [256];
extern uint8 S9xE0M0X0 [256];
extern uint8 S9xE0M0X1 [256];
#endif
extern SICPU ICPU;
END_EXTERN_C
STATIC inline void CLEAR_IRQ_SOURCE(uint32 M)
{
CPU.IRQActive &= ~M;
if (!CPU.IRQActive)
CPU.Flags &= ~IRQ_PENDING_FLAG;
}
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 S9xFixCycles()
{
if (CheckEmulation())
{
#ifndef VAR_CYCLES
ICPU.Speed = S9xE1M1X1;
#endif
ICPU.S9xOpcodes = S9xOpcodesM1X1;
}
else if (CheckMemory())
{
if (CheckIndex())
{
#ifndef VAR_CYCLES
ICPU.Speed = S9xE0M1X1;
#endif
ICPU.S9xOpcodes = S9xOpcodesM1X1;
}
else
{
#ifndef VAR_CYCLES
ICPU.Speed = S9xE0M1X0;
#endif
ICPU.S9xOpcodes = S9xOpcodesM1X0;
}
}
else
{
if (CheckIndex())
{
#ifndef VAR_CYCLES
ICPU.Speed = S9xE0M0X1;
#endif
ICPU.S9xOpcodes = S9xOpcodesM0X1;
}
else
{
#ifndef VAR_CYCLES
ICPU.Speed = S9xE0M0X0;
#endif
ICPU.S9xOpcodes = S9xOpcodesM0X0;
}
}
}
#define 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; \
}
/*
extern "C" {
void asm_APU_EXECUTE(int Mode);
void asm_APU_EXECUTE2(void);
}*/
#define asm_APU_EXECUTE(MODE)\
{\
if (CPU.APU_APUExecuting == MODE) {\
if (Settings.asmspc700) {\
if(CPU.APU_Cycles < CPU.Cycles) {\
int cycles = CPU.Cycles - CPU.APU_Cycles;\
CPU.APU_Cycles += cycles - spc700_execute(cycles);\
}\
}\
else\
{\
while (CPU.APU_Cycles <= CPU.Cycles)\
{\
CPU.APU_Cycles += S9xAPUCycles [*IAPU.PC];\
(*S9xApuOpcodes[*IAPU.PC]) ();\
}\
}\
}\
}
#define asm_APU_EXECUTE2() \
{\
if (CPU.APU_APUExecuting == 1) {\
if (Settings.asmspc700) {\
if (CPU.APU_Cycles < CPU.NextEvent) {\
int cycles = CPU.NextEvent - CPU.APU_Cycles;\
CPU.APU_Cycles += cycles - spc700_execute(cycles);\
}\
}\
else\
{\
do\
{\
CPU.APU_Cycles += S9xAPUCycles [*IAPU.PC];\
(*S9xApuOpcodes[*IAPU.PC]) ();\
} while (CPU.APU_Cycles < CPU.NextEvent);\
}\
}\
}
#endif
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