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