Suma de dos numeros con libreria emu8086.inc

name 'suma de dos numeros'
include 'emu8086.inc'
org 100h

.data
suma db 2 dup (?)

.code
Sumas proc
    printn " "
    print "Introduce el primer numero==>"
    call scan_num
    mov suma[0],cl
    printn " "
    print "Introduce el segundo numero==>"
    call scan_num
    mov suma[1],cl
    printn
    xor ax,ax
    add al,suma[0]
    add al,suma[1]
    printn " "
    print "La suma es: "
    call print_num
   
Sumas endp

exit:
    printn " "
    printn " "
    print "Presiona enter para salir..."
    mov ah,0
    int 16h
    ret
   
define_print_string
define_print_num
define_print_num_uns
define_scan_num
end