Constant WORLD_PACK_DEFAULT_LBA 

pub const WORLD_PACK_DEFAULT_LBA: u32 = 1024;

Where mkisopsx / the editor’s embedded Play place WORLD.PAK: the pack’s first sector, as an absolute data-track LBA. Mirrors psx_iso::WORLD_PACK_DEFAULT_START_LBA (the writer reserves a fixed boot area so runtime LBAs never depend on the boot EXE size); a host test in this crate asserts the two constants stay equal.