public _frames_unused, _stage_frame
public _stage_frame_mod2, _stage_frame_mod4
public _stage_frame_mod8, _stage_frame_mod16
public _slowdown_factor
_frames_unused	dd ?
_stage_frame	dw ?
_stage_frame_mod2	db ?
_stage_frame_mod4	db ?
_stage_frame_mod8	db ?
_stage_frame_mod16	db ?
_slowdown_factor	dw ?