A frame memory 600, {HEAD ~ a CRT} 700, {TAIL ~ a display drive controller} 910 and a bus controller 1010 have the same structures as those in the fourth embodiment 
A frame memory 600 , { HEAD ~ a CRT } 700 , { TAIL ~ a display drive controller } 910 and a bus controller 1010 have the same structures as those in the fourth embodiment
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH