With LPT_Interface.app one can write & read the parallel port's:.
Data Port (8 bit), Control Port (4 bit) and read Status Port (4 bits).

Author: Csanyi Pal <csanyipal@gmail.com>

Copyright (C) 2010 Csanyi Pal

The images and sound files shipped with LPT_Interface.app are part of
LPT_Interface.app. 

LPT_Interface.app is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

LPT_Interface.app is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
                                                                       
You should have received a copy of the GNU General Public License   
along with LPT_Interface.app.  If not, see <http://www.gnu.org/licenses/>.
