FIG 8 shows {HEAD ~ memory subsystem} 800, also labeled {TAIL ~ memory subsystem MSX} 
labeled
FIG 8 shows { HEAD ~ memory subsystem } 800 , also labeled { TAIL ~ memory subsystem MSX }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL