In these figures, and indicate {TAIL ~ the position} directed by the contents of the DPA counter to represent {HEAD ~ the position} for starting the display 
In these figures , and indicate { TAIL ~ the position } directed by the contents of the DPA counter to represent { HEAD ~ the position } for starting the display
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH