(...) Christoph, No, I have not yet solved the problem, but I intend to get back on it soon. I've been busy the past week preparing to present a two-day workshop on RCX Code. Now back to BrickOS (if I can get it working). What a change of gears! Let (...) (21 years ago, 19-Aug-03, to lugnet.robotics.rcx.legos)