For counting half clock cycles, the interpreter 30 may double the count of the counter 12 and then add or subtract {HEAD ~ one count} based on {TAIL ~ the values} of the GH and GL signals 
For counting half clock cycles , the interpreter 30 may double the count of the counter 12 and then add or subtract { HEAD ~ one count } based on { TAIL ~ the values } of the GH and GL signals
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH