How does each EQLive patch break EQemu?

[Raddiux]

Note: I'm not writing this to rush the devs with the latest version or anything. I just want to better understand exactly what goes on and what work is involved when Sony patches the game.

As I understand it, its usually the opcodes and structs that change with each patch. But this only affects server <-> client communication. The underlying way the emulator works doesn't change. Spells still work the same way, mobs still move the same way, Players still attack the same way, right? And I believe that the opcodes don't even always change with every patch. So then what else has to be updated with EQemu to get it compatible? What else does Sony break that needs to be fixed?

[Wiz]

Generally, it's opcodes. But opcodes is huge. If they change a login communication opcode, you can no longer log in. Then there's new client functions (like dye system with LoY), loginserver changes, crypto changes, etc.

[Doodman]

Currently, the biggest hold back in they reinstated crypto in the login process.