Question

An 8255 interfaced with 8086 microprocessor as shown in Figure 4b. Perform the following operations: (a) Identify the Port Address. (b) Identify the Mode 0 control word to configure Port A and Port C\(_u\) as output ports and Port B and Port C\(_L\) as input ports. (c) Write a program to read the DIP switches and display the reading from Port B at Port A, and from Port C\(_L\) at Port C\(_u\).

          An 8255 interfaced with 8086 microprocessor as shown in Figure 4b.
Perform the following operations:
(a) Identify the Port Address.
(b) Identify the Mode 0 control word to configure Port A and Port C\(_u\) as output ports and Port B and Port C\(_L\) as input ports.
(c) Write a program to read the DIP switches and display the reading from Port B at Port A, and from Port C\(_L\) at Port C\(_u\).

An 8255 interfaced with 8086 microprocessor as shown in Figure 4b.
Perform the following operations:
(a) Identify the Port Address.
(b) Identify the Mode 0 control word to configure Port A and Port Cu as output ports and Port B and Port CL as input ports.
(c) Write a program to read the DIP switches and display the reading from Port B at Port A, and from Port CL at Port Cu.

Added by Jennifer B.

Computer Science and Information Technology

Trishna Knowledge Systems 2018 Edition

Instant Answer

Solved by Expert Keondre Parker

Step 1

The Port Address is the address at which the 8255 chip is connected to the microprocessor. It could be any valid I/O address in the range of the microprocessor's I/O address space. Show more…

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An 8255 interfaced with 8086 microprocessor as shown in Figure 4b. Perform the following operations: (a) Identify the Port Address. (b) Identify the Mode 0 control word to configure Port A and Port C as output ports and Port B and Port CL as input ports. (c) Write a program to read the DIP switches and display the reading from Port B at Port A, and from Port CL at Port C. Ver Kl FAZ 47 Ao 45 Hullet FAO Ktm FCT T PC4 Klw AJ Mul! KFA 82554 A 5 PC '8 FBO RD WR RESET DI Switch Fig. 4b