2) The following questions are set up in view of the figure (a). a) Describe what type of 10 operation is carried out in Figure (a). Write an instruction sequence that will input the byte contents of input port 6 to memory location MEMI. b) What is the polling operation? Write a sequence of instructions to poll the input I7 at input port 5 to check whether it is switched to zero or not. Figure (a). c) Write a sequence of instructions that will read the contents of input port 7. Mask off all the bits except LSB. The content of LSB will be shifted to CF. If CF =1, then the program will go to start of service routine XXX. Figure (a). ALE 356 CLK ALA AD-AD, AAS 74F373 (2) Address latch OE . . CBA 74F138 G Input P output Gaddress decoder G b 74F244 Porto AL 10/M 8088 MPU As AD, AD D-D. 74F245 Data bus transceiver DIR G DT/R 74F244 Port 1 DEN G 115 RD gG 1986 74F244 Port 7 Figure (a) Figure 7.12 Sixty-four-line input circuit for an 8088 microcomputer. 2) The following questions are set up in view of the figure (a). a) Describe what type of 10 operation is carried out in Figure (a). Write an instruction sequence that will input the byte contents of input port 6 to memory location MEMI. b) What is the polling operation? Write a sequence of instructions to poll the input I7 at input port 5 to check whether it is switched to zero or not. Figure (a). c) Write a sequence of instructions that will read the contents of input port 7. Mask off all the bits except LSB. The content of LSB will be shifted to CF. If CF =1, then the program will go to start of service routine XXX. Figure (a). ALE 356 CLK ALA AD-AD, AAS 74F373 (2) Address latch OE . . CBA 74F138 G Input P output Gaddress decoder G b 74F244 Porto AL 10/M 8088 MPU As AD, AD D-D. 74F245 Data bus transceiver DIR G DT/R 74F244 Port 1 DEN G 115 RD gG 1986 74F244 Port 7 Figure (a) Figure 7.12 Sixty-four-line input circuit for an 8088 microcomputer