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