{HEAD ~ A peripheral interface unit} 18 is coupled to {TAIL ~ system bus} 12 for interfacing system bus 12 to each of a plurality of peripherals such as peripheral 34, peripheral 36 and peripheral 38 via a peripheral bus 32 
{ HEAD ~ A peripheral interface unit } 18 is coupled to { TAIL ~ system bus } 12 for interfacing system bus 12 to each of a plurality of peripherals such as peripheral 34 , peripheral 36 and peripheral 38 via a peripheral bus 32
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH