Due to this, when the sound processor is accessing one of the common buses, {HEAD ~ another bus master} can access {TAIL ~ another common bus} 
access
Due to this , when the sound processor is accessing one of the common buses , { HEAD ~ another bus master } can access { TAIL ~ another common bus }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL