kopia lustrzana https://github.com/Jean-MarcHarvengt/MCUME
122 wiersze
1.4 KiB
C
122 wiersze
1.4 KiB
C
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#ifndef __MEM_H__
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#define __MEM_H__
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#include "defs.h"
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#define MBC_NONE 0
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#define MBC_MBC1 1
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#define MBC_MBC2 2
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#define MBC_MBC3 3
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#define MBC_MBC5 5
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#define MBC_RUMBLE 15
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#define MBC_HUC1 0xC1
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#define MBC_HUC3 0xC3
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struct mbc
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{
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int type;
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int model;
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int rombank;
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int rambank;
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int romsize;
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int ramsize;
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int enableram;
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int batt;
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byte *rmap[0x10], *wmap[0x10];
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};
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struct ram
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{
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byte hi[256];
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byte ibank[8][4096];
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byte (*sbank)[8192];
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int loaded;
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};
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extern struct mbc mbc;
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extern struct rom rom;
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extern struct ram ram;
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void mem_updatemap(void); //gp32
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void ioreg_write(byte r, byte b);
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void mbc_write(int a, byte b);
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void mem_write(int a, byte b);
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byte mem_read(int a);
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static byte readb(int a)
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{
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return mem_read(a);
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}
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static void writeb(int a, byte b)
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{
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byte *p = mbc.wmap[a>>12];
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if (p) p[a] = b;
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else mem_write(a, b);
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}
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static int readw(int a)
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{
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return mem_read(a) | (mem_read(a+1)<<8);
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}
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static void writew(int a, int w)
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{
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if ((a+1) & 0xfff)
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{
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byte *p = mbc.wmap[a>>12];
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if (p)
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{
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#ifdef IS_LITTLE_ENDIAN
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#ifndef ALLOW_UNALIGNED_IO
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if (a&1)
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{
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p[a] = w;
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p[a+1] = w >> 8;
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return;
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}
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#endif
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*(uint16 *)(p+a) = w;
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return;
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#else
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p[a] = w;
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p[a+1] = w >> 8;
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return;
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#endif
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}
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}
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mem_write(a, w);
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mem_write(a+1, w>>8);
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}
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static byte readhi(int a)
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{
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return readb(a | 0xff00);
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}
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static void writehi(int a, byte b)
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{
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writeb(a | 0xff00, b);
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}
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extern void mbc_reset();
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#endif
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