mirror of
https://github.com/dborth/snes9xgx.git
synced 2024-12-18 07:11:50 +01:00
106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
/*****************************************************************************\
|
|
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
|
|
This file is licensed under the Snes9x License.
|
|
For further information, consult the LICENSE file in the root directory.
|
|
\*****************************************************************************/
|
|
|
|
#ifndef _65C816_H_
|
|
#define _65C816_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 SetCarry() (ICPU._Carry = 1)
|
|
#define ClearCarry() (ICPU._Carry = 0)
|
|
#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 CheckCarry() (ICPU._Carry)
|
|
#define CheckZero() (ICPU._Zero == 0)
|
|
#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 SetFlags(f) (Registers.P.W |= (f))
|
|
#define ClearFlags(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;
|
|
|
|
typedef union
|
|
{
|
|
#ifdef LSB_FIRST
|
|
struct { uint8 xPCl, xPCh, xPB, z; } B;
|
|
struct { uint16 xPC, d; } W;
|
|
#else
|
|
struct { uint8 z, xPB, xPCh, xPCl; } B;
|
|
struct { uint16 d, xPC; } W;
|
|
#endif
|
|
uint32 xPBPC;
|
|
} PC_t;
|
|
|
|
struct SRegisters
|
|
{
|
|
uint8 DB;
|
|
pair P;
|
|
pair A;
|
|
pair D;
|
|
pair S;
|
|
pair X;
|
|
pair Y;
|
|
PC_t PC;
|
|
};
|
|
|
|
#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 PBPC PC.xPBPC
|
|
#define PCw PC.W.xPC
|
|
#define PCh PC.B.xPCh
|
|
#define PCl PC.B.xPCl
|
|
#define PB PC.B.xPB
|
|
|
|
extern struct SRegisters Registers;
|
|
|
|
#endif
|