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# Program that multiply the contents of AL by 8 ( using SHL instruction )

Posted By: Easy Tutor     Category: Assembly Language     Views: 3785

## Code for Program that multiply the contents of AL by 8 ( using SHL instruction ) in Assembly Language

``` .MODEL SMALL
.STACK 100H

.DATA
PROMPT_1  DB  'Original value of AL : \$'
PROMPT_2  DB  0DH,0AH,'Processed value of AL : \$'

.CODE
MAIN PROC
MOV AX, @DATA                ; initialize DS
MOV DS, AX

LEA DX, PROMPT_1             ; load and print PROMPT_1
MOV AH, 9
INT 21H

MOV AL, 31H                  ; place 1 in the AL
MOV BL, AL                   ; save AL in to BL

MOV AH, 2                    ; print the original value of AL
MOV DL, AL
INT 21H

LEA DX, PROMPT_2             ; load and print PROMPT_2
MOV AH, 9
INT 21H

AND BL, 0FH                  ; convert ascii to decimal code

MOV CL, 3                    ; multiply AL by 8
SHL BL, CL

OR BL, 30H                   ; convert decimal to ascii code

MOV AH, 2                    ; print the processed value of AL
MOV DL, BL
INT 21H

MOV AH, 4CH                  ; return control to DOS
INT 21H
MAIN ENDP
END MAIN

;**************************************************************************;
;**************************************************************************;
;------------------------------  THE END  ---------------------------------;
;**************************************************************************;
;**************************************************************************;
```
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