Does anyone wanna

[Noss]

JAL is a Jump and Link. So for example like a regular boot code. the JAL jumps to the an addy that gives error 12.
OR in subroutines..vvvvv

Hooks-Calls (Jumps) to a certain address. The reason we need a hook
is because, when you use a routine, your in a NOP's area. NOP
area isn't in the games CPU, which means it isn't called upon
to be executed by the game.
The hook is what makes the game read it. Without it
you just have a routine that isn't even read by the game.