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#include "snes9x.h"
#include "apu.h"
#include "ppu.h"
#include "cpuexec.h"
//#include "cpuops.h"
#include "os9x_asm_cpu.h"
//#define __debug_c_irq__
//#define __debug_c_nmi__
//#define __debug_c_hblank__
//#define __debug_c_io__
START_EXTERN_C
void asm_S9xSetPCBase(uint32 Address)
{
#ifdef __debug_c_setpc__
printf("spcb\n");
#endif
S9xSetPCBase(Address);
}
#ifdef _C_GW_
#define PushW(w) \
S9xSetWord (w, Registers.S.W - 1);\
Registers.S.W -= 2;
#define PushB(b)\
S9xSetByte (b, Registers.S.W--);
void asm_S9xMainLoop(void)
{
//S9xPackStatus();
//printf("asmMainLoop Enter(0x%08x).\n", CPU.Flags);
asmMainLoop(&CPU);
//printf("asmMainLoop Exit(0x%08x, %d).\n", CPU.PC - CPU.PCBase, CPU.Cycles);
//S9xUnpackStatus();
}
void asm_S9xDoHBlankProcessing(void)
{
#ifdef __debug_c_hblank__
printf("hblank\n");
#endif
// S9xUnpackStatus(); // not needed
S9xDoHBlankProcessing();
// S9xPackStatus();
}
uint8 asm_S9xGetByte(uint32 Address)
{
#ifdef __debug_c_io__
printf("gb\n");
#endif
return S9xGetByte(Address);
}
uint16 asm_S9xGetWord(uint32 Address)
{
#ifdef __debug_c_io__
printf("gw\n");
#endif
return S9xGetWord(Address);
}
void asm_S9xSetByte(uint32 Address, uint8 value)
{
#ifdef __debug_c_io__
printf("sb\n");
#endif
S9xSetByte(value, Address);
}
void asm_S9xSetWord(uint32 Address, uint16 value)
{
#ifdef __debug_c_io__
printf("sw\n");
#endif
S9xSetWord(value, Address);
}
void asm_S9xOpcode_NMI(void)
{
#ifdef __debug_c_nmi__
printf("nmi\n");
#endif
// S9xUnpackStatus(); // not needed
if (!CheckEmulation())
{
PushB(Registers.PB);
PushW(CPU.PC - CPU.PCBase);
// S9xPackStatus ();
PushB(Registers.PL);
ClearDecimal();
SetIRQ();
Registers.PB = 0;
// c = 0; // unused
#ifdef USE_SA1
if (Settings.SA1 && (Memory.FillRAM [0x2209] & 0x20))
S9xSetPCBase(Memory.FillRAM [0x220c] |
(Memory.FillRAM [0x220d] << 8));
else
#endif
S9xSetPCBase(S9xGetWord(0xFFEA));
#ifdef VAR_CYCLES
CPU.Cycles += TWO_CYCLES;
#else
CPU.Cycles += 8;
#endif
}
else
{
PushW(CPU.PC - CPU.PCBase);
// S9xPackStatus (); // not needed
PushB(Registers.PL);
ClearDecimal();
SetIRQ();
Registers.PB = 0;
// ICPU.ShiftedPB = 0; // unused
#ifdef USE_SA1
if (Settings.SA1 && (Memory.FillRAM [0x2209] & 0x20))
S9xSetPCBase(Memory.FillRAM [0x220c] |
(Memory.FillRAM [0x220d] << 8));
else
#endif
S9xSetPCBase(S9xGetWord(0xFFFA));
#ifdef VAR_CYCLES
CPU.Cycles += ONE_CYCLE;
#else
CPU.Cycles += 6;
#endif
}
// S9xPackStatus(); // not needed
}
void asm_S9xOpcode_IRQ(void)
{
#ifdef __debug_c_irq__
printf("irq\n");
#endif
// S9xUnpackStatus(); // not needed
if (!CheckEmulation())
{
PushB(Registers.PB);
PushW(CPU.PC - CPU.PCBase);
// S9xPackStatus (); // not needed
PushB(Registers.PL);
ClearDecimal();
SetIRQ();
Registers.PB = 0;
// ICPU.ShiftedPB = 0; // unused
#ifdef USE_SA1
if (Settings.SA1 && (Memory.FillRAM [0x2209] & 0x40))
S9xSetPCBase(Memory.FillRAM [0x220e] |
(Memory.FillRAM [0x220f] << 8));
else
#endif
S9xSetPCBase(S9xGetWord(0xFFEE));
#ifdef VAR_CYCLES
CPU.Cycles += TWO_CYCLES;
#else
CPU.Cycles += 8;
#endif
}
else
{
PushW(CPU.PC - CPU.PCBase);
// S9xPackStatus (); // not needed
PushB(Registers.PL);
ClearDecimal();
SetIRQ();
Registers.PB = 0;
// ICPU.ShiftedPB = 0; // unused
#ifdef USE_SA1
if (Settings.SA1 && (Memory.FillRAM [0x2209] & 0x40))
S9xSetPCBase(Memory.FillRAM [0x220e] |
(Memory.FillRAM [0x220f] << 8));
else
#endif
S9xSetPCBase(S9xGetWord(0xFFFE));
#ifdef VAR_CYCLES
CPU.Cycles += ONE_CYCLE;
#else
CPU.Cycles += 6;
#endif
}
// S9xPackStatus(); // not needed
}
#endif
END_EXTERN_C
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