FF8/Variables

Game variables can be accessed using the PSHM family of script functions, and can be written to by using the POPM family of functions. Which one you use depends on the variable.

Var type	Var Number	Description
Word	256	Main Story quest progress. In PC saves, value is at offset 0xE10
Byte	720	Squall's costume (0=normal, 1=student, 2=SeeD, 3=Bandage on forehead)
Byte	721	Zell's Costume (0=normal, 1=student, 2=SeeD)
Byte	722	Selphie's costume (0=normal, 1=student, 2=SeeD)
Byte	728	Random game seed? Value of Tomb of Unknown King student ID. Possibly does other things as well.
Byte	730	Joined Garden Festival committee (1=yes, 0=no)
Byte	734	Split Party Flags (+1 Zell, +2 Irvine, +4 Rinoa, +8 Quistis, +16 Selphie). Used to determine which dialogue gets spoken depending on who's in the party.