Question1: Assume that array 1 is located at offset address 0120. As each instru

Question

Question1: Assume that array 1 is located at offset address 0120. As each instruction is executed, fill in the value of the operand listed on the right side:

mov ax, @data

mov ds, ax

mov ax, ptr1 ; a. AX =

mov bx, array1 ; b. BX =

xchg ax, bx ; c. AX =

sub al, 2 ; d. AX =

mov ptr2, bx ; e. ptr2 =

.data

array1 dw 10h, 20h

ptr1 dw array1

ptr2 dw 0

Question 2:

Assume that val1 is located at offset 0120h and that ptr1 is located at offset 0122h. as each instruction is executed, fill in the value of the operand listed on the right side:

.code

mov ax, @data

mov ds, ax

mov ax, 0

mov al, byte ptr val1 ; a. AX =

mov bx, ptr1 ; b. BX =

xchg ax, bx ; c. BX =

sub al, 2 ; d. AX =

mov ax, offset ptr2 ; e. AX =

.data

val1 dw 3Ah

ptr1 dw val1

ptr2 dw ptr1

Explanation / Answer

Question 1:
mov ax, @data
mov ds, ax
mov ax, ptr1 ; a. AX = 10h
mov bx, array1 ; b. BX = 10h
xchg ax, bx ; c. AX = 10h
sub al, 2 ; d. AX = Eh (10h - 2 = 16-2 = 14 = Eh)
mov ptr2, bx ; e. ptr2 = Eh

Question 2:-
.data
array1 dw 10h, 20h
ptr1 dw array1
ptr2 dw 0

Question 2:
.code
mov ax, @data
mov ds, ax
mov ax, 0
mov al, byte ptr val1 ; a. AX = 3Ah
mov bx, ptr1 ; b. BX = 3Ah
xchg ax, bx ; c. BX = 3Ah
sub al, 2 ; d. AX = Eh
mov ax, offset ptr2 ; e. AX = 3Ah

.data
val1 dw 3Ah
ptr1 dw val1
ptr2 dw ptr1

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