NATIONAL OPEN UNIVERSITY OF
NIGERIA CIT 344 Introduction to
Computer Design
14/16, Ahmadu Bello Way, Victoria Island
SCHOOL OF SCIENCE AND TECHNOLOGY October,
2013 Examination
Course
Code: CIT 344 Time:
3hrs
Course
Title:
Introduction to
Computer Design
Course
Credit Unit : 3
Instruction:
QUESTIONS
Answer any five
(5) questions.
1a. Name any four (4) forms of notations that can
be used to capture the behaviour
of finite-state
machines.
(4 marks)
1b. Write short notes on the following:
i. Memory Read
Operation (4 marks)
ii. Data Signals (3 marks)
iii. Read/Write Signals (3 marks)
[Total =14 marks]
2a. If gbx contains 1000h and esi contains 5,
specify the function of the following instruction:
mov al,8[gbx]
[esi*5]
(4 marks)
2b. Write the standard format for assembly
language statements in a typical source file.
(6 marks)
2c. Name each of the fields in the statement you
have provided. (4 marks)
[Total =14 marks]
3a. List and describe the three (3) main forms of
flash memory operations. (12 marks)
3b. Write down the instruction required to move
data from one segment of a
register ‘ecx’ to another
‘edx’.
(2 marks)
[Total =14 marks
4a. Give a brief explanation of how sequential
circuits are implemented, using a well-labelled
block diagram to illustrate
this.
(8 marks)
4b. Distinguish between the two (2) common
types of sequential circuits. (6 marks)
[Total =14 marks]
5a. Find the sum of two 2-digit BCD numbers, 32
and 45. Your result should be in BCD.
(8 marks)
5b. Specify the procedure required to save a
program that is already stored on memory in
Assembly
Language
(6 marks) [Total =14 marks]
6. 6. Go through the table below and answer
the questions that follow:
Input Output
S R Qt + 1
0 0 Invalid
0 1 1
1 0 0
1 1 Qt
6a. Specify what this table
depicts.
(4 marks)
6b. Write the full meaning of S-R in the context
of NAND-based latches (4 marks)
6c. Give the value of the output Q, when S = 0
and R = 1 (6 marks)
[Total =14 marks]
7. 7. Microprocessors normally execute
programs which include operating systems
and user application List and describe the
internal components of a typical
microprocessor.
[Total =14 marks]
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