private void setRomBank(int bank) {
if (bank == 0) {
rom.setBank(1);
} else {
rom.setBank(bank % romBanks);
}
}
public void loadROM(ROM rom) {
// System.out.println("Loading ROM.");
if (!rom.isValid()) {
// System.out.println("MMC2: Invalid ROM! Unable to load.");
return;
}
// Get number of 16K banks:
int num_16k_banks = rom.getRomBankCount() * 4;
// Load PRG-ROM:
loadRomBank(0, 0x8000);
loadRomBank(num_16k_banks - 1, 0xC000);
// Load CHR-ROM:
loadCHRROM();
// Load Battery RAM (if present):
loadBatteryRam();
// Do Reset-Interrupt:
nes.getCpu().requestIrq(CPU.IRQ_RESET);
}
public MBC2(ROM cartridge) {
rom = cartridge;
romBanks = rom.getRomBanks();
eram = new Eram4bit(ADDRESS_ERAM_START, ADDRESS_ERAM_END, 1);
System.out.println("This rom has " + romBanks + " banks");
}
public int read(int address) {
if (address >= 0x0000 && address < 0x8000) {
return rom.read(address);
} else if (address >= ADDRESS_ERAM_START && address < ADDRESS_ERAM_4BIT_END && ramEnable) {
return eram.read(address);
}
return 0;
}
public void loadROM(ROM rom) {
if (!rom.isValid()) {
// System.out.println("Invalid ROM! Unable to load.");
return;
}
// Initial Load:
loadPRGROM();
loadCHRROM();
// Do Reset-Interrupt:
nes.getCpu().requestIrq(CPU.IRQ_RESET);
}
public void loadROM(ROM rom) {
// System.out.println("Loading ROM.");
if (!rom.isValid()) {
System.out.println("VRC2: Invalid ROM! Unable to load.");
return;
}
// Get number of 8K banks:
int num_8k_banks = rom.getRomBankCount() * 2;
// Load PRG-ROM:
load8kRomBank(0, 0x8000);
load8kRomBank(1, 0xA000);
load8kRomBank(num_8k_banks - 2, 0xC000);
load8kRomBank(num_8k_banks - 1, 0xE000);
// Load CHR-ROM:
loadCHRROM();
// Do Reset-Interrupt:
nes.getCpu().requestIrq(CPU.IRQ_RESET);
}
public void loadROM(ROM rom) {
int num_8k_banks = rom.getRomBankCount() * 2;
// Load PRG-ROM:
load8kRomBank(0, 0x8000);
load8kRomBank(1, 0xA000);
load8kRomBank(num_8k_banks - 2, 0xC000);
load8kRomBank(num_8k_banks - 1, 0xE000);
// Load CHR-ROM:
loadCHRROM();
// Do Reset-Interrupt:
nes.getCpu().requestIrq(CPU.IRQ_RESET);
}
/** {@inheritDoc} */
public void saveState(FileOutputStream fos) throws IOException {
rom.saveState(fos);
eram.saveState(fos);
FileIOStreamHelper.writeData(fos, (long) romBank, 4);
FileIOStreamHelper.writeData(fos, (long) romBanks, 4);
}
/** {@inheritDoc} */
public void readState(FileInputStream fis) throws IOException {
rom.readState(fis);
eram.readState(fis);
romBank = (int) FileIOStreamHelper.readData(fis, 4);
romBanks = (int) FileIOStreamHelper.readData(fis, 4);
}
public void forceWrite(int address, int data) {
rom.forceWrite(address, data);
}