On Wednesday 17 Sep 2003 7:36 am, you wrote: > Ken: > > That is exactly the kind of information I am looking for. I am using > QBASIC because I a fairly familiar with writing code. However, I have > never written any real-time code. > The PC has a bidirectional LPT1. > A lot depends on the OS you are running. If it is DOS or linux then it can be quite straightforward but with windows it can be very difficult. Ian -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body