Finally the information about interfacing a TI calculator with a PIC is up. There are two sites: http://www.dvz.fh-koeln.de/~b012414/carlos/pic_interfacing.html http://alh.dhs.org/pichw/ Thanks to Stephan Effelsberg (the 1st link) and Olle Hedman (the 2nd one) Please visit their webpages, you'll find lots of information: http://www.dvz.fh-koeln.de/~b012414 http://alh.dhs.org/ Enjoy :) Carlos Becker