3) The following questions are set up in view of the Figures (de) a) Describe what type of 10 operation is carried out in Figure (d). What are the addresses of data lines, strobe output and busy input in the circuit. Assume that all unused address bits are zero. b) Write a program that will implement the sequence in Figure (e) for the circuit in Figure (d). Character data are held in memory starting at address PRNT_BUFF and the number of characters held in the buffer is identified by the count at address CHAR-COUNT. Write comments and Use minimum number of instructions. assembly 8086 language ALE CLK Au As AD, AD, AD, A 74F373 (2) Address latch OL D-A CLK A CBA P. 7 Pb do 24F138 10 D D D D) D 0 74F373 0 Port 0 . 10/M dos address decoder A G O OE D D Printer 8088 MPU CLK 0, STB 74F373 Part 1 0,- 74F245 Data bus transceiver OE 0 OT/R Busy DIR DEN G 74F244 Port 2 WA RD (d) Figure 7.13 (Continued) Figure (d) Start Initialize character pointer and counter Yes Printer busy? No Read a character for the buffer Output character to D-D Output pulse at STB Update character address and count of characters No Printer buffer empty Yes Figure (e) Done 3) The following questions are set up in view of the Figures (de) a) Describe what type of 10 operation is carried out in Figure (d). What are the addresses of data lines, strobe output and busy input in the circuit. Assume that all unused address bits are zero. b) Write a program that will implement the sequence in Figure (e) for the circuit in Figure (d). Character data are held in memory starting at address PRNT_BUFF and the number of characters held in the buffer is identified by the count at address CHAR-COUNT. Write comments and Use minimum number of instructions. assembly 8086 language ALE CLK Au As AD, AD, AD, A 74F373 (2) Address latch OL D-A CLK A CBA P. 7 Pb do 24F138 10 D D D D) D 0 74F373 0 Port 0 . 10/M dos address decoder A G O OE D D Printer 8088 MPU CLK 0, STB 74F373 Part 1 0,- 74F245 Data bus transceiver OE 0 OT/R Busy DIR DEN G 74F244 Port 2 WA RD (d) Figure 7.13 (Continued) Figure (d) Start Initialize character pointer and counter Yes Printer busy? No Read a character for the buffer Output character to D-D Output pulse at STB Update character address and count of characters No Printer buffer empty Yes Figure (e) Done