There are a number of morse programs, perhaps some of them can be run through pipes. One that drove a parallel port bit with guaranteed real-time priority would be nice. Driving the PC speaker is going to be less than satisfactory on a real-time system. Bruce -- Bruce Perens <Bruce@Pixar.com> A campaigner for Clinton and against Censorship. Toy Story: $183M and counting. At $184M it will beat the #1 movie of 1995.