AIDS- Parameters - Alpha call up (From memory only, LSK2L) for Gross wt in kg enter GWFK, or for lbs enter GWFL. This will display the gross wt as calculated by the FACs based on the principles described in Fcom 1.22.40 pg 4. It forms the basis for determining ALL characteristic speeds displayed on the PFD. It can be significantly different to the wt entered into mcdu (greatest I have seen is 3 ton on an A321).
There are in excess of 100 codes that can be entered, but most are of no real value to the drivers, eg burner PSI, status of fadec sensors.
Cheers