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Program that prompts the user to enter a character, and prints the ASCII code of the character in hex on the next line. Repeat this process ......

Posted By: Easy Tutor     Category: Assembly Language     Views: 12604

An AL program that prompts the user to enter a character, and prints the ASCII code of the character in hex on the next line. Repeat this process untill the user types a carriage return.

Code for Program that prompts the user to enter a character, and prints the ASCII code of the character in hex on the next line. Repeat this process ...... in Assembly Language

 .MODEL SMALL
 .STACK 100H

 .DATA
   PROMPT_1  DB  0DH,0AH,'Enter the character : $'
   PROMPT_2  DB  0DH,0AH,'The ASCII code of the given number in HEX form is : $'

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

     @START:                      ; jump label 
       LEA DX, PROMPT_1           ; load and display the string PROMPT_1
       MOV AH, 9
       INT 21H

       MOV AH, 1                  ; read a character
       INT 21H

       MOV BL, AL                 ; move AL to BL

       CMP BL, 0DH                ; compare BL with CR
       JE @END                    ; jump to label @END if BL=CR

       LEA DX, PROMPT_2           ; load and display the string PROMPT_2
       MOV AH, 9
       INT 21H

       XOR DX, DX                 ; clear DX
       MOV CX, 4                  ; move 4 to CX

       @LOOP_1:                   ; loop label
         SHL BL, 1                ; shift BL towards left by 1 position
         RCL DL, 1                ; rotate DL towards left by 1 position
                                  ; through carry
       LOOP @LOOP_1               ; jump to label @LOOP_1 if CX!=0

       MOV CX, 4                  ; move 4 to CX

       @LOOP_2:                   ; loop label
         SHL BL, 1                ; shift BL towards left by 1 position
         RCL DH, 1                ; rotate DH towards left by 1 position
                                  ; through carry
       LOOP @LOOP_2               ; jump to label @LOOP_2 if CX!=0

       MOV BX, DX                 ; move DX to BX
       MOV CX, 2                  ; initialize loop counter

       @LOOP_3:                   ; loop label
         CMP CX, 1                ; compare CX wiht 1
         JE @SECOND_DIGIT         ; jump to label @SECOND_DIGIT if CX=1
         MOV DL, BL               ; move BL to DL
         JMP @NEXT                ; jump to label @NEXT

         @SECOND_DIGIT:           ; jump label
           MOV DL, BH             ; move BH to DL

         @NEXT:                   ; jump label

         MOV AH, 2                ; set output function

         CMP DL, 9                ; compare DL with 9
         JBE @NUMERIC_DIGIT       ; jump to label @NUMERIC_DIGIT if DL<=9
         SUB DL, 9                ; convert it to number i.e. 1,2,3,4,5,6
         OR DL, 40H               ; convert number to letter i.e. A,B...F
         JMP @DISPLAY             ; jump to label @DISPLAY

         @NUMERIC_DIGIT:          ; jump label
           OR DL, 30H             ; convert decimal to ascii code

         @DISPLAY:                ; jump label
           INT 21H                ; print the character
       LOOP @LOOP_3               ; jump to label @LOOP_3 if CX!=0

       JMP @START                 ; jump to label @START

     @END:                        ; jump label

     MOV AH, 4CH                  ; return control to DOS
     INT 21H
   MAIN ENDP
 END MAIN
  
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Easy Tutor
Easy Tutor author of Program that prompts the user to enter a character, and prints the ASCII code of the character in hex on the next line. Repeat this process ...... is from United States. Easy Tutor says

Hello Friends,

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