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# Program that prompts the user to type a hex number of four hex digits or less, and outputs it in binary on the next line. If the user......

Posted By: Easy Tutor     Category: Assembly Language     Views: 28805

## Code for Program that prompts the user to type a hex number of four hex digits or less, and outputs it in binary on the next line. If the user...... in Assembly Language

``` .MODEL SMALL
.STACK 100H

.DATA
PROMPT_1  DB  'Enter the hexadecimal number ( max 4-digit ) : \$'
PROMPT_2  DB  0DH,0AH,'The equivalent 16-bit binary number is : \$'
ILLEGAL   DB  0DH,0AH,'Illegal hex number. Try again : \$'

COUNT     DB  ?

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

LEA DX, PROMPT_1             ; load and display the string PROMPT_1
MOV AH,9
INT 21H

@START_1:                    ; jump label
LEA DX, ILLEGAL            ; load and display the string ILLEGAL
MOV AH, 9
INT 21H

@START:                      ;
XOR BX, BX                 ; clear BX
MOV COUNT, 30H             ; initialize loop counter

@START_2:                    ; jump label
MOV AH, 1                  ; set input function
INT 21H                    ; read a character

CMP AL, 0DH                ; compare Al with CR

CMP COUNT, 30H             ; compare COUNT with 0

@SKIP:                     ; jump label

CMP AL, "A"                ; compare AL with "A"

CMP AL, "F"                ; compare AL with "F"

@DECIMAL:                  ; jump label
CMP AL, 30H              ; compare AL with 0

CMP AL, 39H              ; compare AL with 9

@OK:                       ; jump label

INC COUNT                  ; increment the COUNT variable

AND AL, 0FH                ; convert the ascii into binary code

MOV CL, 4                  ; set CL=4
SHL AL, CL                 ; shift AL towards left by 4 positions

MOV CX, 4                  ; set CX=4

@LOOP_1:                   ; loop label
SHL AL, 1                ; shift AL towards left by 1 position
RCL BX, 1                ; rotate BX towards left by 1 position
; through carry

CMP COUNT, 34H              ; compare COUNT with 4

@END:                        ; jump label

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

MOV CX, 16                   ; set CX=16
MOV AH, 2                    ; set output function

@LOOP_2:                     ; loop label
SHL BX, 1                  ; shift BX towards left by 1 position
MOV DL, 30H                ; set DL=0

@ONE:                      ; jump label
MOV DL, 31H              ; set DL=1

@DISPLAY:                  ; jump label
INT 21H                  ; display a character

MOV AH, 4CH                  ; return control to DOS
INT 21H
MAIN ENDP
END MAIN
```
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 Easy Tutor author of Program that prompts the user to type a hex number of four hex digits or less, and outputs it in binary on the next line. If the user...... is from United States. Easy Tutor says Hello Friends,I am Free Lance Tutor, who helped student in completing their homework. I have 4 Years of hands on experience on helping student in completing their homework. I also guide them in doing their final year projects.I have share many programs on this website for everyone to use freely, if you need further assistance, than please contact me on easytutor.2ya [at the rate] gmail [dot] comI have special discount scheme for providing tutor services. I am providing tutor service to students from various contries, currently most of my students are from United States, India, Australia, Pakistan, Germany, UK and Canada. I am also here to expand my technical network to receive more opportunity in my career, make friends to help them in resolving their technical problem, learn and share my knowledge, If you like to be my friend, Please send me friend request.Thanks,Happy Programming :) View All Articles

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