Anyone knows hard-codes limits of Alex?

[Atraphoenix]

I am searching whole forums both in org and TW but I had no chance to find hard-coded limits of alex.
Specifically, I just want to know how many entry we can add EDU of EB 1.2 while using alex.
Or if I have to add one unit entry, does it mean I have to sacrifice an entry?
DMB should be 330 (search result no idea on reality)

Thanks beforehand
Atra