Dear friends, thanks for your reply to my first request.i found PIC assembler and simulator in http://www.ultranet.com/biz/mchip but i could not get them .because our INTERNET line in IRAN is very slow(9600 bps). so i have a new request.may you treat me kindly and send me these programs by e-mail? if you have in mind to do this kindness please use uuencode to change binary file to ascii for e-mail. thanks for your kindness and cooperation. A.Marami ELECTRONICS engineer e-mail: marami@rose.ipm.ac.ir