During the interrupt cycle the IEN flip flop is set to 1. O a. False O b. True on code Multiplexes Sabroutine Register (SBR) Contre adres reputer (CAR) Incrementer Control memory Select Microoperacions Branch drew The control memory in the above figure has 1024 words of 20 bits each. How many bits are there in each of the four inputs shown going into the multiplexers? vo data Port A register Bidirectional Gabus Bus buffers vo data Port B register CPU CS VO Device Internal bus RS1 Chip select Register select Register select VO road VO write Control Control register Timing and Control RSO RD Status WR Status register Consider the above figure that shows an I/O Interface Unit, and answer the following question. a. If the interface is connected to a printer. What would be the data direction? b. The control register receives control information from A computer employs RAM Chips of 512*8 and ROM chips of 2048*8. The computer system needs 1K bytes of RAM and 4K bytes of ROM. How many RAM chips will be needed? b. How many ROM chips will be needed? How many address lines are needed for each RAM chip? a. C. d. How many address lines are needed for each ROM chip? e. How many address lines should be available at least for the CPU? F1 Microoperation Symbol F2 Microoperation Symbol F3 Microoperation Symbol 000 001 010 011 100 101 110 111 None ACAC + DR ACO AC AC + 1 ACDR AR-DR(0-10) AR PC M[AR] --DR NOP ADD CLRAC INCAC DRTAC DRTAR POTAR WRITE 000 001 010 011 100 101 110 111 None AC AG - DR ACAC V DR AC AC ADR DR-M[AR] DR - AC DR -DR +1 DR(0-10) --PC NOP SUB OR AND READ ACTDR INCDR PCTDR 000 001 010 011 100 101 110 111 Nonc AC ACDR ACAC AC shl AC AC-shr AC PC PC +1 PC EAR Reserved NOP XOR COM SHL SHR INCPC ARTPC Using the above table, give the 9-bit microoperation field for the following microoperations: AC