Question

An ALP to print only lowercase alphabets[A-Z] using emu8086 and the code will be written like this form EX:

MOV AX, @DATA ; initialize

DS MOV DS, AX

and please write explanation when writing the code so we can understand it

Answer 1

The code in ALP to print only lowercse alphabets using emu8086 with explanation is as follows:

 .MODEL SMALL
 .STACK 100H

 .DATA
    PROMPT  DB  'The Lower Case Letters from z to a 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, 122                  ; set Dl with 'z'

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

       DEC DL                     ; increment DL to next ASCII character
       DEC CX                     ; decrement CX
       
     JNZ @LOOP                    ; Jump to label @LOOP if CX is 0f

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