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