public static void PasswordProgramm(FamicomDumperLocal dumper, byte[] password)
{
if (password.Length != 8)
{
throw new InvalidDataException("Invalid password length");
}
Console.Write("Programming password... ");
// Password Protection Set Entry
dumper.WriteCpu(0x8AAA, 0xAA);
dumper.WriteCpu(0x8555, 0x55);
dumper.WriteCpu(0x8AAA, 0x60);
try
{
for (byte i = 0; i < password.Length; i++)
{
dumper.WriteCpu(0x8000, 0xA0);
dumper.WriteCpu((ushort)(0x8000 + i), password[i]);
}
var verify = dumper.ReadCpu(0x8000, 8);
for (byte i = 0; i < password.Length; i++)
{
if (password[i] != verify[i])
{
throw new InvalidDataException("Password verification failed");
}
}
}
finally
{
ResetFlash(dumper);
}
Console.WriteLine("OK");
Console.Write("Programming lock register... ");
// Lock Register Set Entry
dumper.WriteCpu(0x8AAA, 0xAA);
dumper.WriteCpu(0x8555, 0x55);
dumper.WriteCpu(0x8AAA, 0x40);
try
{
// Bits Program
dumper.WriteCpu(0x8000, 0xA0);
dumper.WriteCpu(0x8000, (byte)(1 << 2) ^ 0xFF); // password protection
var r = dumper.ReadCpu(0x8000);
if ((r & 7) != 3)
{
throw new InvalidDataException("Lock bit verification failed");
}
}
finally
{
ResetFlash(dumper);
}
Console.WriteLine("OK");
}
public static void PasswordUnlock(FamicomDumperLocal dumper, byte[] password)
{
try
{
if (password.Length != 8)
{
throw new InvalidDataException("Invalid password length");
}
Console.Write("Unlocking password... ");
// Password Protection Set Entry
dumper.WriteCpu(0x8AAA, 0xAA);
dumper.WriteCpu(0x8555, 0x55);
dumper.WriteCpu(0x8AAA, 0x60);
// Password unlock
dumper.WriteCpu(0x8000, 0x25);
dumper.WriteCpu(0x8000, 0x03);
for (byte i = 0; i < password.Length; i++)
{
dumper.WriteCpu((ushort)(0x8000 + i), password[i]);
}
dumper.WriteCpu(0x8000, 0x29);
Console.WriteLine("OK");
}
finally
{
ResetFlash(dumper);
}
}