{TAIL ~ The log memory} is formed of a plurality of banks, and {HEAD ~ stores history information} in the plurality of banks in a ring like fashion 
{ TAIL ~ The log memory } is formed of a plurality of banks , and { HEAD ~ stores history information } in the plurality of banks in a ring like fashion
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH