NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
JANUARY/FEBRUARY 2013 EXAMINATION

Course Code:                          CIT 344                                              Time:   3hrs

Course Title:                           Introduction to Computer Design      Course Credit Unit:3

DATE:                                                Tuesday 29th Jan                   

Instruction:                             Answer any five (5) questions.

QUESTIONS

1a. Give the standard set-up for assembly language statements in a typical source file.                                                                                                                (8 marks)

1b. Name each of the fields in the statement you have provided.                    (12 marks)

[Total =20 marks]

2.   If kfx contains 1000h and esi contains 4, specify the function of the following instructions:

1. mov al,1000h[kfx][kfx*2]                                                                  (12 marks)
2. mov al,1000h[esi*8]                                                                            (8 marks)

[Total =20 marks]

3a. Explain how sequential circuits are implemented, using a well-labelled block diagram to illustrate this.                                                                                  (12 marks)

3b. Identify the difference  between two (2) common types of sequential circuits_. (8 marks)

[Total =20 marks]

4a. List and describe the three (3) main forms of flash memory operations.  (16 marks)

4b. Write down the instruction required to move data from one segment of a register ‘ecx’ to another ‘edx’.                                                                    (4 marks)

[Total =20 marks]

5. As a general rule, microprocessors implement programs. Identify and describe the internal components of a typical microprocessor.

[Total =20 marks]

6. Briefly describe the following concepts in computer design:

1. Memory Read Operation                                                                    )
2. Data Signals                                                                                        )5 marks each
3. Read/Write Signals                                                                              )
4. RAM                                                                                                  )

[Total =20 marks]

 7. Following from your knowledge of computer design, specify any four (4) forms of

    Notations that can be used to capture the behaviour of finite-state machines.                                                                               

[Total =20 marks]