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1's complement code not working ! help please

Discussion in 'Assembly Language Programming (ALP) Forum' started by rabir, May 4, 2013.

  1. rabir

    rabir New Member

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    Hi everyone
    i'm new in assembly language.i try to code for 1's complement but not working.is there anyone who can detect my error

    code is
    Code:
    Title Length of an array
    .model small
    .stack 100h
    .data
    msg0 db 0dh,0ah, 'Enter the binary value :  $'
    msg1 db 0dh,0ah, 'the 1s complement form is: $'
    str1 db 255 dup (?)
    one db ?
    two db ?
    .code
    main proc
    mov ax,@data
    mov ds,ax
    
    lea dx,msg0
    mov ah,09h
    int 21h
    
    lea si,str1 ; read a string 
    mov ah,01h
    
    read:
            int 21h
            ;mov bl,al
            
            cmp al,0dh; carrage return
            je display; if input is a carrege return than jump display section
    
            cmp al,00h
            je _0_
    
            cmp al,01h
            je _1_
    
    _0_:
            mov al,30h
            mov [si],al
            inc si
            jmp read
    
    _1_:    
            mov al,31h
            mov [si],al
            inc si
            jmp read        
    
    
    
    display: 
                
                  mov al,'$'
                mov [si],al
                
                
                lea dx,msg1
                mov ah,09h
                int 21h
                
                lea dx, str1
                mov ah,09h
                int 21h
    
                mov ah, 4ch
                int 21h
    main endp
    end main
    
    thanks everyone
     
    Last edited by a moderator: May 5, 2013

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