sorry...never played flight sim..
I already checked on FCOM 1.22.30(Autoflight-Flight guidance)
but here I find only stuff for autoflight & FMA changes.
I think it's more Power Plant stuff(1.70):this change occurs on EWD(upper Ecam).Thrust limit mode is depending from Fadec or EIU...
..but i cant find nothing about it..
CFM equipped 320..serial numbers varing between 790 and 2000