Microprocessor and Computer Architecture 2079

Section A

Long Answer Questions

Attempt any TWO questions.(2*10=20)

1. What is 8085 microprocessor ? Explain the functional units of microprocessor in brief.

2. Draw the block diagram of Hardwired control unit and explain their functional units in brief.

3. State an algorithm for the restoring division method of fixed point binary division .Show the step-by step division process using restoring division algorithm when 480(01110 00000) is divided by 17(10001). Use 5-bit register the numbers.

Section B

Short Answer Questions

Attempt any EIGHT questions.(8*5=40)

4. What is the difference between SAP-1 and SAP-2?

5. What is instruction cycle? If the clock frequency is 5 MHz, how much time is required to execute an instruction MVI A, 08H?

6. What is Microoperations? Explain the function of each following microoperations

AR ←   PC

DR  ←  M[AR], PC ←PC + 1

AR  ←  DR(0-10), CAR(2-5)←DR(11-14),

7. What is Instruction Format of basic computer architecture? A computer uses a memory unit with 256K words of 32 bit each. Draw the instruction word format and indicate the number of bits in each part.

8. Write a 8085 assembly language for division of two 8-bit numbers by repeated subtraction method.

9. Explain the use of mapping table.