diff options
Diffstat (limited to 'src/sa1.h')
| -rw-r--r-- | src/sa1.h | 169 |
1 files changed, 84 insertions, 85 deletions
@@ -4,7 +4,7 @@ * (c) Copyright 1996 - 2001 Gary Henderson (gary.henderson@ntlworld.com) and
* Jerremy Koot (jkoot@snes9x.com)
*
- * Super FX C emulator code
+ * 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_.
@@ -50,61 +50,61 @@ typedef struct
{
- uint8 PB;
- uint8 DB;
- pair P;
- pair A;
- pair D;
- pair S;
- pair X;
- pair Y;
- uint16 PC;
-}SSA1Registers ;
+ uint8 PB;
+ uint8 DB;
+ pair P;
+ pair A;
+ pair D;
+ pair S;
+ pair X;
+ pair Y;
+ uint16 PC;
+} SSA1Registers ;
typedef struct
{
- SOpcodes *S9xOpcodes;
- uint8 _Carry;
- uint8 _Zero;
- uint8 _Negative;
- uint8 _Overflow;
- bool8 CPUExecuting;
- uint32 ShiftedPB;
- uint32 ShiftedDB;
- uint32 Flags;
- bool8 Executing;
- bool8 NMIActive;
- bool8 IRQActive;
- bool8 WaitingForInterrupt;
- bool8 Waiting;
-// uint8 WhichEvent;
- uint8 *PC;
- uint8 *PCBase;
- uint8 *BWRAM;
- uint8 *PCAtOpcodeStart;
- uint8 *WaitAddress;
- uint32 WaitCounter;
- uint8 *WaitByteAddress1;
- uint8 *WaitByteAddress2;
-// long Cycles;
-// long NextEvent;
-// long V_Counter;
- int16 op1;
- int16 op2;
- int arithmetic_op;
- int64 sum;
- bool8 overflow;
-
- uint8 VirtualBitmapFormat;
- bool8 in_char_dma;
- uint8 variable_bit_pos;
-}SSA1;
+ SOpcodes* S9xOpcodes;
+ uint8 _Carry;
+ uint8 _Zero;
+ uint8 _Negative;
+ uint8 _Overflow;
+ bool8 CPUExecuting;
+ uint32 ShiftedPB;
+ uint32 ShiftedDB;
+ uint32 Flags;
+ bool8 Executing;
+ bool8 NMIActive;
+ bool8 IRQActive;
+ bool8 WaitingForInterrupt;
+ bool8 Waiting;
+ // uint8 WhichEvent;
+ uint8* PC;
+ uint8* PCBase;
+ uint8* BWRAM;
+ uint8* PCAtOpcodeStart;
+ uint8* WaitAddress;
+ uint32 WaitCounter;
+ uint8* WaitByteAddress1;
+ uint8* WaitByteAddress2;
+ // long Cycles;
+ // long NextEvent;
+ // long V_Counter;
+ int16 op1;
+ int16 op2;
+ int arithmetic_op;
+ int64 sum;
+ bool8 overflow;
+
+ uint8 VirtualBitmapFormat;
+ bool8 in_char_dma;
+ uint8 variable_bit_pos;
+} SSA1;
extern SSA1Registers SA1Registers;
extern SSA1 SA1;
-extern uint8 *SA1_Map [MEMMAP_NUM_BLOCKS];
-extern uint8 *SA1_WriteMap [MEMMAP_NUM_BLOCKS];
+extern uint8* SA1_Map [MEMMAP_NUM_BLOCKS];
+extern uint8* SA1_WriteMap [MEMMAP_NUM_BLOCKS];
#ifdef USE_SA1
@@ -124,65 +124,64 @@ extern uint8 *SA1_WriteMap [MEMMAP_NUM_BLOCKS]; #define SA1CheckFlag(f) (SA1Registers.PL & (f))
START_EXTERN_C
-uint8 S9xSA1GetByte (uint32);
+uint8 S9xSA1GetByte(uint32);
//uint16 S9xSA1GetWord (uint32);
#define S9xSA1GetWord(address) (S9xSA1GetByte(address) | (S9xSA1GetByte(address+1) << 8))
-void S9xSA1SetByte (uint8, uint32);
+void S9xSA1SetByte(uint8, uint32);
//void S9xSA1SetWord (uint16, uint32);
#define S9xSA1SetWord(word, address) S9xSA1SetByte(word, address); S9xSA1SetByte(word >> 8, address+1);
-void S9xSA1SetPCBase (uint32);
-uint8 S9xGetSA1 (uint32);
-void S9xSetSA1 (uint8, uint32);
+void S9xSA1SetPCBase(uint32);
+uint8 S9xGetSA1(uint32);
+void S9xSetSA1(uint8, uint32);
extern SOpcodes S9xSA1OpcodesM1X1 [256];
extern SOpcodes S9xSA1OpcodesM1X0 [256];
extern SOpcodes S9xSA1OpcodesM0X1 [256];
extern SOpcodes S9xSA1OpcodesM0X0 [256];
-void S9xSA1MainLoop ();
-void S9xSA1Init ();
-void S9xFixSA1AfterSnapshotLoad ();
-void S9xSA1ExecuteDuringSleep ();
+void S9xSA1MainLoop();
+void S9xSA1Init();
+void S9xFixSA1AfterSnapshotLoad();
+void S9xSA1ExecuteDuringSleep();
END_EXTERN_C
-#define SNES_IRQ_SOURCE (1 << 7)
+#define SNES_IRQ_SOURCE (1 << 7)
#define TIMER_IRQ_SOURCE (1 << 6)
-#define DMA_IRQ_SOURCE (1 << 5)
+#define DMA_IRQ_SOURCE (1 << 5)
STATIC inline void S9xSA1UnpackStatus()
{
- SA1._Zero = (SA1Registers.PL & Zero) == 0;
- SA1._Negative = (SA1Registers.PL & Negative);
- SA1._Carry = (SA1Registers.PL & Carry);
- SA1._Overflow = (SA1Registers.PL & Overflow) >> 6;
+ SA1._Zero = (SA1Registers.PL & Zero) == 0;
+ SA1._Negative = (SA1Registers.PL & Negative);
+ SA1._Carry = (SA1Registers.PL & Carry);
+ SA1._Overflow = (SA1Registers.PL & Overflow) >> 6;
}
STATIC inline void S9xSA1PackStatus()
{
- SA1Registers.PL &= ~(Zero | Negative | Carry | Overflow);
- SA1Registers.PL |= SA1._Carry | ((SA1._Zero == 0) << 1) |
- (SA1._Negative & 0x80) | (SA1._Overflow << 6);
+ SA1Registers.PL &= ~(Zero | Negative | Carry | Overflow);
+ SA1Registers.PL |= SA1._Carry | ((SA1._Zero == 0) << 1) |
+ (SA1._Negative & 0x80) | (SA1._Overflow << 6);
}
-STATIC inline void S9xSA1FixCycles ()
+STATIC inline void S9xSA1FixCycles()
{
- if (SA1CheckEmulation ())
- SA1.S9xOpcodes = S9xSA1OpcodesM1X1;
- else
- if (SA1CheckMemory ())
- {
- if (SA1CheckIndex ())
- SA1.S9xOpcodes = S9xSA1OpcodesM1X1;
- else
- SA1.S9xOpcodes = S9xSA1OpcodesM1X0;
- }
- else
- {
- if (SA1CheckIndex ())
- SA1.S9xOpcodes = S9xSA1OpcodesM0X1;
- else
- SA1.S9xOpcodes = S9xSA1OpcodesM0X0;
- }
+ if (SA1CheckEmulation())
+ SA1.S9xOpcodes = S9xSA1OpcodesM1X1;
+ else if (SA1CheckMemory())
+ {
+ if (SA1CheckIndex())
+ SA1.S9xOpcodes = S9xSA1OpcodesM1X1;
+ else
+ SA1.S9xOpcodes = S9xSA1OpcodesM1X0;
+ }
+ else
+ {
+ if (SA1CheckIndex())
+ SA1.S9xOpcodes = S9xSA1OpcodesM0X1;
+ else
+ SA1.S9xOpcodes = S9xSA1OpcodesM0X0;
+ }
}
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