TEC 586 - TP 7 - Partie 3

;                   Jugurtha Hadjar & Raouf Moualdi

;             Vérification de nombres dans une table dans la RAM
;                et mise à zéro des éléments négatifs
;                           TP 7 - Partie 3
;               Compilateur A86 & Utilisation de Debug



DATA_SEG SEGMENT

        org 2000h

        TABLE  dw 0FFh,0FAh,0A0h,0AAh,0EEh,067h,089h,0DEh,0DDh,0CFh,000h,0EFh,044h,011h,00Ch,099h

        NBR_ELEMENTS equ 16 ; Number of elements to check.

DATA_SEG ENDS


assume DS:DATA_SEG, CS:CODE




CODE SEGMENT

org 4000h

main:

        mov ax, DATA_SEG      ; Initialize Data Segment
        mov ds, ax

        mov si, offset TABLE
        mov cx, NBR_ELEMENTS  ; Initialize the counter, CX
                              ;

lookup_loop:


        mov  ah , byte ptr[SI]
        rol  ax , 1
        jnc  landing_zone    ; If the number is positive, skip the call
                             ; to the zeroing procedure.

        call replace_negative_element

landing_zone:

        add  si, 2           ; Go to the next Word (two bytes) in the table
        loop lookup_loop

        jmp exit             ; Go to program exit



replace_negative_element proc near  ; Procedure replacing the negative element by 0.


        mov byte ptr [SI], 00h
        ret

replace_negative_element endp


exit:

mov ah, 4Ch          ; Exit routine
int 21h


end main

code ends