mpu401_read_data
mpu401_read_data(emu, mpu);
byte = mpu401_read_data(emu, midi);
if (mpu401_read_data(emu, midi) == MPU401_ACK)
if (!ok && mpu401_read_data(emu, midi) == MPU401_ACK)
mpu401_read_data(emu, midi));
if (mpu401_read_data(emu, midi) == MPU401_ACK)
if (!ok && mpu401_read_data(emu, midi) == MPU401_ACK)
mpu401_read_data(emu, midi));
mpu401_read_data(emu, mpu);
byte = mpu401_read_data(emu, midi);