CS401 GDB 1 Solution and Discussion

[zaasmi]

Re: CS401 Assignment 1 Solution and Discussion

Computer Architecture and Assembly Language Programming (CS401)
Assignment # 01
Total marks = 20

Deadline Date
June 1, 2020

Please carefully read the following instructions before attempting assignment.
RULES FOR MARKING
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Topic Covered:
• Segmented Memory Model
• Addressing Modes
NOTE
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If you people find any mistake or confusion in assignment (Question statement), please consult with your instructor before the deadline. After the deadline no queries will be entertained in this regard.
For any query, feel free to email at:
cs401@vu.edu.pk

Q 1. Calculate the effective address for the following set of values. (5)
Code Segment = 6032h
BX = 3060h
DI = 4001h
Offset = 0470h

Q 2. Find the physical Address, if segment address is FF01H and offset is FF02H.(7)

Q 3. Calculate the offset when the physical address is 003Ch and the contents of segment register are 003Ah. (8)

“The End”

[zaasmi]

@zaasmi said in CS401 Assignment 1 Solution and Discussion Spring 2020:

Q 1. Calculate the effective address for the following set of values. (5)
Code Segment = 6032h
BX = 3060h
DI = 4001h
Offset = 0470h

Solution:
Effective address = Base + Index + Offset
= 3060h + 4001h + 0470 h
= 74D1h

[zaasmi]

@zaasmi said in CS401 Assignment 1 Solution and Discussion Spring 2020:

Q 2. Find the physical Address, if segment address is FF01H and offset is FF02H.(7)

Solution:
Physical address = (Segment Address*0x10) + Offset address.
= (FF01h * 0x10) + FF02h
= FF010h + 0FF02h
= 0EF12h

[zaasmi]

@zaasmi said in CS401 Assignment 1 Solution and Discussion Spring 2020:

Q 3. Calculate the offset when the physical address is 003Ch and the contents of segment register are 003Ah. (8)

Solution:
Physical address = (Segment Address0x10) + Offset address.
Offset Address = Physical address – (Segment Address0x10).
= 0003Ch – (003Ah*0x10)
= 0003Ch - 003A0h
= FC9Ch