/**
* Perform a CPU address space read. This maps all the relevant objects into the correct parts of
* the memory
*/
public final short addressRead(int addr) {
addr = addr & 0xFFFF;
switch ((addr & 0xF000)) {
case 0x0000:
case 0x1000:
case 0x2000:
case 0x3000:
case 0x4000:
case 0x5000:
case 0x6000:
case 0x7000:
return cartridge.addressRead(addr);
case 0x8000:
case 0x9000:
return graphicsChip.addressRead(addr - 0x8000);
case 0xA000:
case 0xB000:
return cartridge.addressRead(addr);
case 0xC000:
return (mainRam[addr - 0xC000]);
case 0xD000:
return (mainRam[addr - 0xD000 + (gbcRamBank * 0x1000)]);
case 0xE000:
return mainRam[addr - 0xE000];
case 0xF000:
if (addr < 0xFE00) {
return mainRam[addr - 0xE000];
} else if (addr < 0xFF00) {
return (short) (oam[addr - 0xFE00] & 0x00FF);
} else {
return ioHandler.ioRead(addr - 0xFF00);
}
default:
System.out.println("Tried to read address " + addr + ". pc = " + JavaBoy.hexWord(pc));
return 0xFF;
}
}
