{HEAD ~ The program memory} 420 commonly applies {TAIL ~ the selection control signal} to the second group multiplexers 431 434 
{ HEAD ~ The program memory } 420 commonly applies { TAIL ~ the selection control signal } to the second group multiplexers 431 434
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH