org   0
   ljmp  2000h

   org   100h
   mov   dptr,#1234h
   movx  a,@dptr   
   mov   dptr,#5678h
   mov   a,#5ah
   movx  @dptr,a
   mov   dptr,#9abch
   clr   a
   movc  a,@a+dptr
   mov   dptr,#0
   clr   a
   movc  a,@a+dptr
   ljmp  0

   org   2000h
   nop
   mov   a,#10
   sjmp  $+2
   mul   ab
   mov   dptr,#1234h
   movx  a,@dptr   
   mov   dptr,#5678h
   mov   a,#5ah
   movx  @dptr,a
   mov   dptr,#9abch
   clr   a
   movc  a,@a+dptr
   mov   dptr,#0
   clr   a
   movc  a,@a+dptr
   ljmp  100h

   end