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problem 1) In a peripheral-mapped I/O, can an input port and the output port have the same port address? Describe in detail.

problem 2) prepare down the control signals that are essential in the memory-mapped I/O?

problem 3) Name the four categories of 8085 instructions which manipulate data.

problem 4) describe opcode and operand, and state the opcode and the operand in the instruction MOV H, L.

problem 5) prepare down logical steps to add following two Hex numbers. Both the numbers must be saved for future use. Store the sum in an accumulator. Numbers: A2H and 18H.

problem 6) State the contents of registers and flag status as the following instructions are executed.

i) MVI A, 00H

ii) MVI B, F8H

iii) MOV C, A

iv) MOV D, B

v) HLT

problem 7) prepare down instructions to load hexadecimal number 65H in register C and 92H in accumulator A. Show the number 65H at PORT0 and 92H at PORT1.

problem 8) Draw and describe the block diagram of a microprocessor 8085.

problem 9) Why the lower order address bus is multiplexed with data bus? How they will be de-multiplexed?

problem 10) Distinguish between maskable and non-maskable interrupts.

problem 11) prepare down 8085 assembly language program using minimum number of instructions to add 16 bit no. in BC, DE & HL. Save the 16 bit result in DE pair.

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M99212

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