8086 ALP to convert ASCII to Hexadecimal number

Problem: Write an Assembly Language Program to convert ASCII to Hexadecimal number.

Title: 8086 ALP to convert ASCII to Hexadecimal number

.model small
.stack 10h
.data
ascii db 00h
hex db 00h,00h
.code
start:
mov ax,@data
mov ds,ax
mov es,ax

mov ah,00h ;;request byte input
int 16h

cld ;;store it
mov di,offset ascii
stosb

mov cl,4 ;; shift factor
mov si,offset ascii
mov di,offset hex+1
lodsb
mov ah,al
shr ah,cl
and ah,0fh ;;bits for high nibble
and al,0fh ;;bits for low nibble

std

cmp al,0ah ;; low-nibble conversion
jb non_char1
add al,07h
non_char1:
add al,30h
stosb

cmp ah,0ah ;; high-nibble conversion
jb non_char2
add ah,07h
non_char2:
add ah,30h
mov al,ah
stosb
cld

print: ;; print hex
mov ah,40h
mov bx,01h
mov cx,02h
mov dx,offset hex
int 21h

bye:
mov ah,4ch
int 21h
end start