public _boss_flystep_random_clamp
_boss_flystep_random_clamp	label area_t
	dw ((BOSS_W / 2) shl 4)
	dw ((PLAYFIELD_W - (BOSS_W / 2)) shl 4)
	dw (24 shl 4)
	dw (128 shl 4)

	dw ?