Tribhuvan University
Bachelor of Information Technology
Semester 2 · TU Board 2079
Course Title: Microprocessor and Computer Architecture (BIT151)
Full Marks: 60Pass Marks: 24Time: 3 hours
Candidates are required to give their answers in their own words as far as practicable.
Group A
Attempt any Two questions.(2 × 10 = 20)
- 1.10
What is 8085 microprocessor? Explain the functional units of 8085 microprocessor in brief.
- 2.10
Draw the block diagram of Hardwired control unit and explain their functional units in brief.
- 3.10
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 448(01110 00000) is divided by 17(10001). Use 5-bit register to represent the numbers.
Group B
Attempt any Eight questions(8 × 5 = 40)
- 4.5
What is the difference between SAP-1 and SAP-2?
- 5.5
What is instruction cycle? If the clock frequency is 5 MHz, how much time is required to execute an instruction MVI A, 08H?
- 6.5
What is Microoperations? Explain the function of each following microoperations AR ← PCDR ← M[AR], PC ← PC+1AR ← DR(0 - 10), CAR(2 - 5) ← DR(11 - 14)
- 7.5
What is Instruction Format of basic computer architecture? A computer uses a memory unit with 256K words of 32 bits each. Draw the instruction word format and indicate the number of bits in each part.
- 8.5
Write a 8085 assembly language for division of two 8-bit numbers by repeated subtraction method.
- 9.5
Explain the use of mapping table.
- 10.5
What is the difference between isolated I/O and memory-mapped I/O? What are the advantages and disadvantages of each?
- 11.5
What is pipelining? Explain the role of pipelining in computing.
- 12.5
Write short notes on: a. Multiplexed Address b. Memory Hierarchy
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