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| author | aliaspider | 2015-11-09 19:55:28 +0100 |
|---|---|---|
| committer | aliaspider | 2015-11-09 19:55:28 +0100 |
| commit | 7a7857f47b33f1b63fb585d2dc6c60d87c3e928f (patch) | |
| tree | a4c271ae26c4b5ec9566f37062168e6d2c8c1bbc /src/os9x_asm_cpu.c | |
| parent | 5339c79ebd36afa759541d0c2fbdadac6dd26ed2 (diff) | |
| download | snes9x2002-7a7857f47b33f1b63fb585d2dc6c60d87c3e928f.tar.gz snes9x2002-7a7857f47b33f1b63fb585d2dc6c60d87c3e928f.tar.bz2 snes9x2002-7a7857f47b33f1b63fb585d2dc6c60d87c3e928f.zip | |
C++ --> C99
Diffstat (limited to 'src/os9x_asm_cpu.c')
| -rw-r--r-- | src/os9x_asm_cpu.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/src/os9x_asm_cpu.c b/src/os9x_asm_cpu.c new file mode 100644 index 0000000..bfd2ec5 --- /dev/null +++ b/src/os9x_asm_cpu.c @@ -0,0 +1,255 @@ +#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
+
+/*
+void asm_APU_EXECUTE(int Mode)
+{
+#ifdef __debug_c_apuex__
+ printf("apuexec\n");
+#endif
+ if(CPU.APU_APUExecuting != Mode) return;
+
+ 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]) ();
+ }
+ }
+}
+
+
+void asm_APU_EXECUTE2(void)
+{
+ if(CPU.APU_APUExecuting != 1) return;
+
+ //ICPU.CPUExecuting = FALSE;
+ 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);
+ }
+ //ICPU.CPUExecuting = TRUE;
+}*/
+
+END_EXTERN_C
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