void InitEEPROMMapper()
{
ReadMemoryMapper = ReadMemoryEEPROM;
WriteMemoryMapper = WriteMemoryEEPROM;
MapMemory = MapMemoryEEPROM;
WriteMemoryEEPROM(0xFFFC, 0);
WriteMemoryEEPROM(0xFFFD, 0);
WriteMemoryEEPROM(0xFFFE, 1);
WriteMemoryEEPROM(0xFFFF, 2);
EEPROM = new EEPROM93c46();
}
CDLog_MapResults MapMemoryEEPROM(ushort address, bool write)
{
if (address < 0xC000)
{
if ((Port3E & 0x48) == 0x48) // cart and bios disabled, return empty bus
{
return(new CDLog_MapResults());
}
if (BiosMapped && BiosRom != null)
{
return(new CDLog_MapResults()); //bios tracking of CDL is not supported
}
if (address < 1024)
{
return new CDLog_MapResults {
Type = CDLog_AddrType.ROM, Address = address
}
}
;
if (address < 0x4000)
{
return new CDLog_MapResults {
Type = CDLog_AddrType.ROM, Address = (RomBank0 * BankSize) + address
}
}
;
if (address < 0x8000)
{
return new CDLog_MapResults {
Type = CDLog_AddrType.ROM, Address = (RomBank1 * BankSize) + (address & BankSizeMask)
}
}
;
switch (SaveRamBank)
{
case 0: return(new CDLog_MapResults {
Type = CDLog_AddrType.ROM, Address = (RomBank2 * BankSize) + (address & BankSizeMask)
});
case 1: return(new CDLog_MapResults()); // a serial IO port
case 2: return(new CDLog_MapResults()); // a serial IO port
default:
return(new CDLog_MapResults {
Type = CDLog_AddrType.MainRAM, Address = address & RamSizeMask
});
}
}
return(new CDLog_MapResults {
Type = CDLog_AddrType.MainRAM, Address = address & RamSizeMask
});
}
void WriteMemoryEEPROM(ushort address, byte value)
{
if (address >= 0xC000)
{
SystemRam[address & RamSizeMask] = value;
}
else if (address >= 0x8000)
{
if (SaveRAM != null)
{
SaveRamModified = true;
EEPROM.Write(value, SaveRAM);
return;
}
Console.WriteLine("Game attempt to use SRAM but SRAM not present");
}
if (address >= 0xFFFC)
{
if (address == 0xFFFC)
{
if ((value & 8) != 0)
{
SaveRamBank = (byte)((value & 4) == 0 ? 1 : 2); // SaveRAM selected
}
else
{
SaveRamBank = 0; // ROM bank selected
}
}
else if (address == 0xFFFD)
{
RomBank0 = (byte)(value % RomBanks);
}
else if (address == 0xFFFE)
{
RomBank1 = (byte)(value % RomBanks);
}
else if (address == 0xFFFF)
{
RomBank2 = (byte)(value % RomBanks);
}
}
}
void InitEEPROMMapper()
{
ReadMemoryMapper = ReadMemoryEEPROM;
WriteMemoryMapper = WriteMemoryEEPROM;
MapMemory = MapMemoryEEPROM;
WriteMemoryEEPROM(0xFFFC, 0);
WriteMemoryEEPROM(0xFFFD, 0);
WriteMemoryEEPROM(0xFFFE, 1);
WriteMemoryEEPROM(0xFFFF, 2);
EEPROM = new EEPROM93c46();
}
}
}
