; this sample prints out a hex value of DL register. 

name "digit"

org 100h

mov dl, 7ch

; load address of data table in bx, for xlat instruction: 
lea bx, table

; xlat does the following: 
; al = ds:[bx + unsigned al] 

mov al, dl
shr al, 4    ; leave high part only. 
xlat         ; get hex digit.  
mov ah, 0eh  ; teletype sub-function. 
int 10h


mov al, dl
and al, 0fh  ; leave low part only. 
xlat         ; get hex digit.      
mov ah, 0eh  ; teletype sub-function. 
int 10h

; wait for any key press: 
mov ah, 0
int 16h


ret

table db '0123456789abcdef'