MPU401_ACK
if (mpu->read(mpu, MPU401D(mpu)) == MPU401_ACK)
if (!ok && mpu->read(mpu, MPU401D(mpu)) == MPU401_ACK)
if (temp != MPU401_ACK /*0xfe */ ) {
if (mpu401_read_data(emu, midi) == MPU401_ACK)
if (!ok && mpu401_read_data(emu, midi) == MPU401_ACK)
if (mpu401_read_data(emu, midi) == MPU401_ACK)
if (!ok && mpu401_read_data(emu, midi) == MPU401_ACK)
if (data == MPU401_ACK)