To accomplish this, the scan logic 20 compares {HEAD ~ the inputs} from the analog to digital converter 44 to {TAIL ~ the stored values} of the map  
To accomplish this , the scan logic 20 compares { HEAD ~ the inputs } from the analog to digital converter 44 to { TAIL ~ the stored values } of the map
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH