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Sct 203: Microprocessor And Microcomputer Question Paper

Sct 203: Microprocessor And Microcomputer

Course:Bachelor Of Science

Institution: Kenyatta University question papers

Exam Year:2011

DATE: Friday 29th April 2011
TIME: 8.00a.m – 10.00a.m

INSTRUCTIONS:
1.
This paper is divided into two Sections A and B
2.
Question one in Section A is compulsory
3.
Answer any other two questions from Section B

SECTION A
Question 1
(a)
Briefly describe an interrupt.

(6 Marks)
(b)
Briefly explain the following characteristics of storage.

(i)
Volatility

(ii)
Mutability

(iii)
Accessibility

(iv)
Addressability

(8 Marks)
(c)
Briefly describe the primary memory.

(8 Marks)
(d)
Explain the following arithmetic and logic instructions

(i)
ADD CL, [BP]

(ii)
ADD BX, TEMP[DI]

(8 Marks)

Page 1 of 2

SECTION B
Question 2 (20 Marks)
(a)
By use of a well labeled diagram, explain the major components of a microcomputer.
(12 Marks)
(b)
State the advantages of the segment registers.

(8 Marks)

Question 3
(20 Marks)
(a)
Explain briefly the following components of the Bus Interface Unit.

(i)
Instruction Queue

(ii)
Segment register

(iii)
Instruction pointer and address summation.

(14 Marks)
(b)
Distinguish between the real mode and protected mode memory addressing. (6 Marks)

Question 4
(20 Marks)
(a)
The microprocessor is divided into two parts i.e. the BIU and the EU. Explain the

purpose of each?

(8 Marks)
(b)
Briefly describe the flag register.

(12 Marks)

Question 5
(20 Marks)
(a)
Define the following terms
(i)
Operands
(ii)
Processor register

(4 Marks)
(b)
Write a data transfer instruction that can move data addresses and operands into
registry/memory locations.

(8 Marks)
(c)
(i)
Define a Bus.
(iii)
Explain the purpose for each of the following types of buses; Address, Data and
Control.

(8 Marks)

Page 2 of 2

Sct 203: Microprocessor And Microcomputer Question Paper

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