K6502.h

00001 /*===================================================================*/
00002 /*                                                                   */
00003 /*  K6502.h : Header file for K6502                                  */
00004 /*                                                                   */
00005 /*  1999/10/19  Racoon  New preparation                              */
00006 /*                                                                   */
00007 /*===================================================================*/
00008 
00009 #ifndef K6502_H_INCLUDED
00010 #define K6502_H_INCLUDED
00011 
00012 // Type definition
00013 #ifndef DWORD
00014 typedef unsigned long  DWORD;
00015 //typedef unsigned int  DWORD;
00016 #endif
00017 
00018 #ifndef WORD
00019 typedef unsigned short WORD;
00020 //typedef unsigned short WORD;
00021 #endif
00022 
00023 #ifndef BYTE
00024 typedef unsigned char  BYTE;
00025 //typedef char  BYTE;
00026 #endif
00027 
00028 #ifndef NULL
00029 #define NULL 0
00030 #endif
00031 
00032 /* 6502 Flags */
00033 #define FLAG_C 0x01
00034 #define FLAG_Z 0x02
00035 #define FLAG_I 0x04
00036 #define FLAG_D 0x08
00037 #define FLAG_B 0x10
00038 #define FLAG_R 0x20
00039 #define FLAG_V 0x40
00040 #define FLAG_N 0x80
00041 
00042 /* Stack Address */
00043 #define BASE_STACK   0x100
00044 
00045 /* Interrupt Vectors */
00046 #define VECTOR_NMI   0xfffa
00047 #define VECTOR_RESET 0xfffc
00048 #define VECTOR_IRQ   0xfffe
00049 
00050 // NMI Request
00051 #define NMI_REQ  NMI_State = 0;
00052 
00053 // IRQ Request
00054 #define IRQ_REQ  IRQ_State = 0;
00055 
00056 // Emulator Operation
00057 void K6502_Init();
00058 void K6502_Reset();
00059 void K6502_Set_Int_Wiring( BYTE byNMI_Wiring, BYTE byIRQ_Wiring );
00060 void K6502_Step( register WORD wClocks );
00061 
00062 // I/O Operation (User definition)
00063 static inline BYTE K6502_Read( WORD wAddr);
00064 static inline WORD K6502_ReadW( WORD wAddr );
00065 static inline BYTE K6502_ReadZp( BYTE byAddr );
00066 static inline WORD K6502_ReadZpW( BYTE byAddr );
00067 static inline BYTE K6502_ReadAbsX();
00068 static inline BYTE K6502_ReadAbsY();
00069 static inline BYTE K6502_ReadIY();
00070 
00071 static inline void K6502_Write( WORD wAddr, BYTE byData );
00072 static inline void K6502_WriteW( WORD wAddr, WORD wData );
00073 
00074 // The state of the IRQ pin
00075 extern BYTE IRQ_State;
00076 
00077 // The state of the NMI pin
00078 extern BYTE NMI_State;
00079 
00080 #endif /* !K6502_H_INCLUDED */
00081 
00082