nesemu/cpu/op.h

24 lines
606 B
C
Raw Normal View History

2023-12-23 16:35:23 -05:00
#include "../include/cpu.h"
2024-01-11 16:02:53 -05:00
#include "decoding.h"
2023-12-23 16:35:23 -05:00
2023-09-24 22:02:08 -04:00
#ifndef CPU_OP_H
#define CPU_OP_H
// The number associated with each op code is the matching line of the ALU op code.
// Based on the table here: https://www.nesdev.org/wiki/CPU_unofficial_opcodes
2023-10-05 17:05:06 -04:00
enum op_code_base {
OP_CODE_BASE_ORA = 0x00,
OP_CODE_BASE_AND = 0x20,
OP_CODE_BASE_EOR = 0x40,
OP_CODE_BASE_ADC = 0x60,
OP_CODE_BASE_STA = 0x80,
OP_CODE_BASE_LDA = 0xa0,
OP_CODE_BASE_CMP = 0xc0,
OP_CODE_BASE_SBC = 0xe0
2023-09-22 14:39:25 -04:00
};
2023-09-24 22:02:08 -04:00
2024-01-06 14:27:09 -05:00
void process_op_code(System *system, byte op);
2023-12-23 16:35:23 -05:00
2024-01-11 16:02:53 -05:00
AddressingMode get_op_addr_mode(byte op_code);
2023-12-23 16:35:23 -05:00
#endif