An Assembly Language Program to print Upper Case Letters from A to Z

An Assembly Language Program to print Upper Case Letters from A to Z .

 .MODEL SMALL
 .STACK 100H

 .DATA
    PROMPT  DB  'The Upper Case Letters from A to Z are : $'

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

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

     MOV CX, 26                   ; initialize CX

     MOV AH, 2                    ; set output function  
     MOV DL, 65                   ; set DL with A

     @LOOP:                       ; loop start
       INT 21H                    ; print character

       INC DL                     ; increment DL to next ASCII character
       DEC CX                     ; decrement CX
 
     JNZ @LOOP                    ; jump to label @LOOP if CXis 0

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

.MODEL SMALL

.STACK 100H

.DATA

PROMPT DB 'The Upper Case Letters from A to Z are : $'

.CODE

MAIN PROC

MOV AX, @DATA ; initialize DS

MOV DS, AX

LEA DX, PROMPT ; load and print PROMPT

MOV AH, 9

INT 21H

MOV CX, 26 ; initialize CX

MOV AH, 2 ; set output function

MOV DL, 65 ; set DL with A

@LOOP: ; loop start

INT 21H ; print character

INC DL ; increment DL to next ASCII character

DEC CX ; decrement CX

JNZ @LOOP ; jump to label @LOOP if CXis 0

MOV AH, 4CH ; return control to DOS

INT 21H

MAIN ENDP

END MAIN

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An Assembly Language Program to print Upper Case Letters from A to Z

An Assembly Language Program to print Upper Case Letters from A to Z .

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