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Friday, May 10, 2013

Re: ::: vuaskari.com ::: CS401 Assignment # 2 discussion and solution

Dear fellows,

 Don't forget the pre-requisite to have the solution. That's only your concern and discussion about the assignment.

Thanks and good luck.


On Fri, May 10, 2013 at 7:31 AM, aspirant bibliophile <aspirant.bibliophile@gmail.com> wrote:

Computer Architecture and Assembly language programming (CS401)

 

Assignment # 2

 

  Total marks = 20

                                                                                    Deadline Date = May 13, 2013

 

Please carefully read the following instructions before attempting assignment.

 

Rules for Marking

It should be clear that your assignment would not get any credit if:

 

  • The assignment is submitted after the due date.
  • The submitted assignment does not open or file is corrupt.
  • Strict action will be taken if submitted solution is copied from any other student or from the internet. Students will be punished severely in either case.

 

 

1)      You should concern recommended books to clarify your concepts as handouts are not sufficient.

2)      You are supposed to submit your assignment in .doc format. Any other formats like scan images, PDF, zip, rar, bmp etc will not be accepted.

3)      You are advised to upload your assignment at least two days before the due date.

4)      The assignment file comprises of two pages.

 

 

Note: 

 

Assignment comprises of lectures No. 9-13.

 

No assignment will be accepted after the due date via email in any case (whether it is the case of load shedding or internet malfunctioning etc.). Hence refrain from uploading assignment in the last hour of deadline. It is recommended to upload solution file at least two days before its deadline.

 

For any query, feel free to email at:

cs401@vu.edu.pk


 

                        [ORG 0100H]

 

                        MOV AX, 5

                        MOV CX, AX

                        XOR DX, DX

                        DEC CX

           

CONT:            MOV BX, CX           

                        MUL BX

                        DEC CX

                        JNZ CONT

 

                        MOV DX, AX

 

                        MOV AX, 0X4C00

                        INT 0X21

 

 

Assemble above assembly language code using NASM and answer the following questions:

 

Q.1. Execute the code in order to examine how changes are made in registers and memory. Students are required to fill in below table after step by step execution of each instruction in the debugger.          

                                                                                                                        (15 marks)

S No.

 

INSTRUCTION

 

REGISTER VALUES

 

INSTRUCTION POINTER (IP)

FLAG/STATUS REGISTER

CF

ZF

PF

SF

AF

 

1

 

 

[ORG 0100H]

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

2

 

 

MOV AX,5

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

3

 

 

MOV CX,AX

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

4

 

 

XOR DX,DX

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

5

 

 

DEC CX

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

6

 

CONT:

 

MOV BX,CX

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

7

 

 

MUL BX

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

8

 

 

DEC CX

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

9

 

 

JNZ CONT

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

10

 

CONT:

 

MOV BX,CX

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 


 

11

 

 

 

MUL BX

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

12

 

 

DEC CX

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

13

 

 

JNZ CONT

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

14

 

CONT:

 

MOV BX,CX

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

15

 

 

MUL BX

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

16

 

 

DEC CX

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

17

 

 

JNZ CONT

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

18

 

CONT:

 

MOV BX,CX

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

19

 

 

MUL BX

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

20

 

 

DEC CX

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 


 

21

 

 

JNZ CONT

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

22

 

MOV DX,AX

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

26

 

MOV AX,0X4C00

AX

 

 

 

 

 

 

 

BX

 

CX

 

DX

 

 

 

Q.2. Provide the snapshot of debugger showing calculated result stored in DX at the end of our program.                                                                                                                                                                                                                                       (3 marks)

 

 

Q.3. Briefly explain the purpose of the given code.

(2 marks)

 

 

 

Best of luck!

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--
We say, "Be one as Pakistani Nation and grow up for Pakistan's Future". Wish you all the best. Join www.vuaskari.com,
To post to this group, send email to vuaskari_com@googlegroups.com
Visit these groups:
This (Main) Group:http://groups.google.com/group/vuaskari_com?hl=en?hl=en
MIT/MCS Group: http://groups.google.com/group/vu_askarimit?hl=en?hl=en
HRM Group: http://groups.google.com/group/askari_hrm?hl=en?hl=en
Banking Group: http://groups.google.com/group/askari_banking?hl=en?hl=en
Management: https://groups.google.com/group/vuaskari_mgt?hl=en
Marketing: https://groups.google.com/group/vuaskari_mkt?hl=en
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