MOD-IO addresses of analog input

[marcbas2]

Hi,
What are the correct addresses for the various analog inputs?
The README file says this:

cccccccc - command code, should be 0x30 for AIN1, 0x31 for AIN2, 0x31 for AIN3, 0x31 for AIN4.

0x31 for all imputs but AIN1 ?

I tried 0x30, X031, 0x32, 0x33 for inputs AIN1 to AIN4 but I'm not sure if that's correct.
Could you confirm?

Thanks,

Marc