Computer Architecture > QUESTIONS & ANSWERS > Computer Architecture and Assembly Language Programming | Download assignment for quality score | (All)

Computer Architecture and Assembly Language Programming | Download assignment for quality score |

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Q#1. Identify the problems in the following instructions and correct them by replacing them with one or two instruction having the same effect. i. mov [05], [ 24] ; Memory to memory move is illega ... l in Intel architecture. The correct instructions for this operation could be mov ax, [24] mov [24],ax ii. mov [label1], 501 ; Constant to memory move is illegal in Intel architecture. The correct instruction could be mov ax,501 mov [label1] ,ax iii. mov bx, al ; Size mismatch i.e. bx is 16 bit register and al is 8 bit register. The correct statement could be mov bx, ax or mov bl, al iv. mov ax, [si+di+100] ; Addition of two index register in one memory access is disallowed. We can do this operation by addition of index and base register. mov ax,[si+ bx+100] v. mov bx,[bs+bp+200] ; Addition of two based register in one memory access is disallowed. We can do this operation by addition of index and base register. mov ax,[bp+ si+100] Q#2. Write a program to calculate the square of 10 by using a loop that adds 10 to the accumulator 10 times. Solution: [org 0x0100] mov bx,10 mov cx,10 mov ax,0 l1: add ax, bx sub cx, 1 jnz l1 mov [total], ax mov ax,0x4c00 int 0x21 total: dw 0 This study source was downloaded by 100000853497421 from CourseH [Show More]

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