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CS401 Computer Architecture and Assembly Language Programming Assignment #01

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Objective

The assignment has been designed to enable you:
  • To know about different addressing modes
  • To calculate effective address and physical address
  • To know about the comparisons and conditions
Answer the following questions
Q#1.
a.          Calculate the physical memory address generated by the following segment offset pairs.
i.        74F0:2123
ii.      0000:6727
iii.    FFFF:4336
iv.    AB01:FFFF
v.      0FFF:FFFF
b.          Identify the problems in the following instructions and correct them by replacing them with one or two instruction having the same effect.
i.        mov [02], [ 22]
ii.      mov [wordvar], 20l
iii.    mov bx, al
iv.    mov ax, [si+di+100]
v.      mov  bx,[bs+bp+200]

Q#2.

a. Write a program in assembly language that calculate the factorial of a number where
    factorial is defined as:
Factorial(x) = x*(x-1)*(x-2)*...*1
factorial (0) = 1
b. If AX=8FFF and BX=0FFF and “cmp ax, bx” is executed, which of the following  
    jumps will be taken? Each part is independent of others. Also give the value of Z, S,
    and C flags.
                                                              i.      jg greater
                                                            ii.      jl smaller
                                                          iii.      ja above

                                                          iv.      jb below