Question

​Assembly Language

 

Assume we have two string variables:

Shakespeare byte 'Brevity is the soul of wit' and

Poet byte 'The problem is not in the stars but within ourselves'

 

Write a AL program that will interchange the contents of the two variables.

Answer 1

Copyable Code:

SECTION .data
input db 'Enter SHAKESPEARE and POET Strings: ', 0Ah
inputLen equ $ - input
answer db 'After Interchanging: ', 0Ah
answerLen equ $ - answer

SECTION .bss
firstMSG: resb 255 ;for shakespeare byte
secondMsg: resb 255 ;for poet byte

SECTION .text
global _start

_start:

;print input
mov edx, inputLen
mov ecx, input
mov ebx, 1
mov eax, 4
int 80h

mov edx, 255
mov ecx, firstMSG
mov ebx, 0
mov eax, 3   
int 80h

mov edx, 255
mov ecx, secondMsg
mov ebx, 0
mov eax, 3
int 80h

;display the input
mov edx, answerLen
mov ecx, answer
mov ebx, 1
mov eax, 4
int 80h
  
mov edx, 255
mov ecx, secondMsg
mov ebx, 1
mov eax, 4
int 80h

mov edx, 255
mov ecx, firstMSG
mov ebx, 1
mov eax, 4
int 80h
mov ebx, 0
mov eax, 1
int 80h