rockbox/apps/plugins/rockboy/mem.h

#ifndef __MEM_H__
#define __MEM_H__

#include "defs.h"

#define MBC_NONE    0
#define MBC_MBC1    1
#define MBC_MBC2    2
#define MBC_MBC3    4
#define MBC_MBC5    8
#define MBC_RUMBLE  16
#define MBC_HUC1    32
#define MBC_HUC3    64
#define MBC_RTC     128
#define MBC_BAT     256

struct mbc
{
    int type;
    int model;
    int rombank;
    int rambank;
    int romsize;
    int ramsize;
    int enableram;
    int batt;
    byte *rmap[0x10], *wmap[0x10];
};

struct rom
{
    byte (*bank)[16384];
    char name[20];
};

struct ram
{
    byte hi[256];
    byte ibank[8][4096];
    byte (*sbank)[8192];
    int loaded;
};

extern struct mbc mbc;
extern struct rom rom;
extern struct ram ram;

void mem_updatemap(void) ICODE_ATTR;
void mem_write(int a, byte b) ICODE_ATTR;
byte mem_read(int a) ICODE_ATTR;
void mbc_reset(void);


#define READB(a) ( mbc.rmap[(a)>>12] \
? mbc.rmap[(a)>>12][(a)] \
: mem_read((a)) )
#define READW(a) ( READB((a)) | ((word)READB((a)+1)<<8) )

#define WRITEB(a, b) ( mbc.wmap[(a)>>12] \
? ( mbc.wmap[(a)>>12][(a)] = (b) ) \
: ( mem_write((a), (b)), (b) ) )
#define WRITEW(a, w) ( WRITEB((a), (w)&0xFF), WRITEB((a)+1, (w)>>8) )

#endif