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