I recall playing with this on the -11, but it seems to have become extinct (the program, I mean). I seem to recall that it was written in PDP-11 assembly; did it ever get rewritten in C? -- Dave Horsfall DTM (VK2KFU) "Those who don't understand security will suffer" "The complexity for minimum component costs has increased at a rate of roughly a factor of two per year." -- G.Moore, Electronics, Vol 38 No 8, 1965