anchor.diff:  	    slip_unpack_acc(Xs,[?ESC|Acc])
       end.
   
  -	    
  -	    
  -    
   
  +
  +
  +
  
positive.code: 
  slip_unpack_acc([],Acc) -> Acc;
  slip_unpack_acc([X|Xs],Acc) ->
      case X of 
  	?ESC ->
  	    slip_unpack_esc_acc(Xs,Acc);
  	?END ->
  
negative.code: 
  -export([start/1,init/2]).
  
  start(IPAddress) when is_list(IPAddress), length(IPAddress) == 4 ->
      spawn_link(slip,init,[IPAddress,self()]);
  
  start(IPAddress) when is_atom(IPAddress) ->
      xk:start(),
      case xk:host2ip(IPAddress) of
  	{ok,IpDst} ->
  