ocr: SEAD/WRITE Fin 7 R/W is on input to TED to distinsuish the type of operation to be performed. TED will actively pull UP the system read line during a1l TEN retches. The read sisnal is aualified with MUX. The Pin is an oren source output, INTEREUPT Pin e The interrurt Pin is an Oren drain output, TEDI contains rour interrupt sources: 3 internal timers and the raster comparator. PHI OUT Pin 12 Fer increased Processor throushruti TED doubles the freauency :f the system clock. durins horizontal and vertical blankins. The actusl sinsle clock boundries are: 1) Raster lines 0-204 and horizontal posit ...
