Here is the source for DUMMYKCT, a dummy RotorDRV program that is compatible with InstantTrack OrbitDRV and other programs that expect to drive a Kansas City Track or compatible rotor control TSR. I do not claim that this program is a great example of TSR programming, but it is a working example on which a RotorDRV could be built. If you use this source to build something, I would very much appreciate hearing about it. If you build something of general use (like a RotorDRV for an available hardware design), PLEASE make it available to all. Good luck! 73 -Paul Williamson, KB5MU kb5mu@amsat.org