1  
  2  #ifndef __MEM_H__
  3  #define __MEM_H__
  4  
  5  
  6  #include "defs.h"
  7  
  8  
  9  
 10  #define MBC_NONE 0
 11  #define MBC_MBC1 1
 12  #define MBC_MBC2 2
 13  #define MBC_MBC3 3
 14  #define MBC_MBC5 5
 15  #define MBC_RUMBLE 15
 16  #define MBC_HUC1 0xC1
 17  #define MBC_HUC3 0xC3
 18  
 19  struct mbc
 20  {
 21  	int type;
 22  	int model;
 23  	int rombank;
 24  	int rambank;
 25  	int romsize;
 26  	int ramsize;
 27  	int enableram;
 28  	int batt;
 29  	byte *rmap[0x10], *wmap[0x10];
 30  };
 31  
 32  
 33  struct ram
 34  {
 35  	byte hi[256];
 36  	byte ibank[8][4096];
 37  	byte (*sbank)[8192];
 38  	int loaded;
 39  };
 40  
 41  
 42  extern struct mbc mbc;
 43  extern struct rom rom;
 44  extern struct ram ram;
 45  
 46  
 47  
 48  
 49  
 50  void mem_updatemap(void); //gp32
 51  void ioreg_write(byte r, byte b);
 52  void mbc_write(int a, byte b);
 53  void mem_write(int a, byte b);
 54  byte mem_read(int a);
 55  
 56  
 57  static byte readb(int a)
 58  {
 59  	return mem_read(a);
 60  }
 61  
 62  static void writeb(int a, byte b)
 63  {
 64  	byte *p = mbc.wmap[a>>12];
 65  	if (p) p[a] = b;
 66  	else mem_write(a, b);
 67  }
 68  
 69  static int readw(int a)
 70  {
 71  	return mem_read(a) | (mem_read(a+1)<<8);
 72  }
 73  
 74  static void writew(int a, int w)
 75  {
 76  	if ((a+1) & 0xfff)
 77  	{
 78  		byte *p = mbc.wmap[a>>12];
 79  		if (p)
 80  		{
 81  #ifdef IS_LITTLE_ENDIAN
 82  #ifndef ALLOW_UNALIGNED_IO
 83  			if (a&1)
 84  			{
 85  				p[a] = w;
 86  				p[a+1] = w >> 8;
 87  				return;
 88  			}
 89  #endif
 90  			*(uint16 *)(p+a) = w;
 91  			return;
 92  #else
 93  			p[a] = w;
 94  			p[a+1] = w >> 8;
 95  			return;
 96  #endif
 97  		}
 98  	}
 99  	mem_write(a, w);
100  	mem_write(a+1, w>>8);
101  }
102  
103  static byte readhi(int a)
104  {
105  	return readb(a | 0xff00);
106  }
107  
108  static void writehi(int a, byte b)
109  {
110  	writeb(a | 0xff00, b);
111  }
112  
113  
114  
115  extern void mbc_reset();
116  
117  
118  #endif
119  
120  
121