Thanks folks, just in case you’re wondering why  I asked - it’s mentioned on one of the swiki tutorial pages I’m trying to update. It’s such a nice old project I really hope it can be kept available always. It’s also a nice approach to certain kinds of programming and I’d love to see someone with proper electronic and/or electrical knowledge using it as a basis for teaching wiring and signal processing and stuff like that. T’would make a nice app to put on the Pi, for example.

tim
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tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
"How many Kzin does it take to change a lightbulb?" "None. You can scream and leap in the dark."