emu-mem-io.h

#pragma once

#include "emu-types.h"


#define MEM_MAX 0x100000  // 1 MB
#define IO_MAX  0x10000   // 64 KB

#define ROM_BASE 0x80000


// Memory breakpoint

extern byte_t _break_data_flag;
extern addr_t _break_data_addr;


// Memory states

extern byte_t mem_stat [MEM_MAX];
extern byte_t code_stat [MEM_MAX];


// Emulator operations

void * mem_get_addr (addr_t a);

byte_t mem_read_byte_0 (addr_t a);
word_t mem_read_word_0 (addr_t a);

int mem_write_byte_0 (addr_t a, byte_t b, byte_t init);
int mem_write_word_0 (addr_t a, word_t w, byte_t init);

int io_read_byte_0 (word_t p, byte_t * b);
int io_read_word_0 (word_t p, word_t * w);

int io_write_byte_0 (word_t p, byte_t b);
int io_write_word_0 (word_t p, word_t w);


// Board operations

byte_t mem_read_byte (addr_t a);
word_t mem_read_word (addr_t a);

void mem_write_byte (addr_t a, byte_t b, byte_t init);
void mem_write_word (addr_t a, word_t w, byte_t init);

int io_read_byte (word_t p, byte_t * b);
int io_read_word (word_t p, word_t * w);

int io_write_byte (word_t p, byte_t b);
int io_write_word (word_t p, word_t w);


void mem_io_reset ();