mirror of
https://github.com/RevCurtisP/C02.git
synced 2024-11-15 17:08:51 +00:00
76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
#ifndef __m6502_h
|
|
#define __m6502_h
|
|
|
|
|
|
#include <stdio.h>
|
|
#include <stdint.h>
|
|
|
|
typedef struct _M6502 M6502;
|
|
typedef struct _M6502_Registers M6502_Registers;
|
|
typedef struct _M6502_Callbacks M6502_Callbacks;
|
|
|
|
typedef int (*M6502_Callback)(M6502 *mpu, uint16_t address, uint8_t data);
|
|
|
|
typedef M6502_Callback M6502_CallbackTable[0x10000];
|
|
typedef uint8_t M6502_Memory[0x10000];
|
|
|
|
enum {
|
|
M6502_NMIVector= 0xfffa, M6502_NMIVectorLSB= 0xfffa, M6502_NMIVectorMSB= 0xfffb,
|
|
M6502_RSTVector= 0xfffc, M6502_RSTVectorLSB= 0xfffc, M6502_RSTVectorMSB= 0xfffd,
|
|
M6502_IRQVector= 0xfffe, M6502_IRQVectorLSB= 0xfffe, M6502_IRQVectorMSB= 0xffff
|
|
};
|
|
|
|
struct _M6502_Registers
|
|
{
|
|
uint8_t a; /* accumulator */
|
|
uint8_t x; /* X index register */
|
|
uint8_t y; /* Y index register */
|
|
uint8_t p; /* processor status register */
|
|
uint8_t s; /* stack pointer */
|
|
uint16_t pc; /* program counter */
|
|
};
|
|
|
|
struct _M6502_Callbacks
|
|
{
|
|
M6502_CallbackTable read;
|
|
M6502_CallbackTable write;
|
|
M6502_CallbackTable call;
|
|
};
|
|
|
|
struct _M6502
|
|
{
|
|
M6502_Registers *registers;
|
|
uint8_t *memory;
|
|
M6502_Callbacks *callbacks;
|
|
unsigned int flags;
|
|
};
|
|
|
|
enum {
|
|
M6502_RegistersAllocated = 1 << 0,
|
|
M6502_MemoryAllocated = 1 << 1,
|
|
M6502_CallbacksAllocated = 1 << 2
|
|
};
|
|
|
|
extern M6502 *M6502_new(M6502_Registers *registers, M6502_Memory memory, M6502_Callbacks *callbacks);
|
|
extern void M6502_reset(M6502 *mpu);
|
|
extern void M6502_nmi(M6502 *mpu);
|
|
extern void M6502_irq(M6502 *mpu);
|
|
extern void M6502_run(M6502 *mpu);
|
|
extern int M6502_disassemble(M6502 *mpu, uint16_t addr, char buffer[64]);
|
|
extern void M6502_dump(M6502 *mpu, char buffer[64]);
|
|
extern void M6502_delete(M6502 *mpu);
|
|
|
|
#define M6502_getVector(MPU, VEC) \
|
|
( ( ((MPU)->memory[M6502_##VEC##VectorLSB]) ) \
|
|
| ((MPU)->memory[M6502_##VEC##VectorMSB] << 8) )
|
|
|
|
#define M6502_setVector(MPU, VEC, ADDR) \
|
|
( ( ((MPU)->memory[M6502_##VEC##VectorLSB]= ((uint8_t)(ADDR)) & 0xff) ) \
|
|
, ((MPU)->memory[M6502_##VEC##VectorMSB]= (uint8_t)((ADDR) >> 8)) )
|
|
|
|
#define M6502_getCallback(MPU, TYPE, ADDR) ((MPU)->callbacks->TYPE[ADDR])
|
|
#define M6502_setCallback(MPU, TYPE, ADDR, FN) ((MPU)->callbacks->TYPE[ADDR]= (FN))
|
|
|
|
|
|
#endif __m6502_h
|