Around the middle of the 1980s, Lego made a robotics system for 8-bit
computers, including the Apple II, BBC Micro, Commodore 64, and IBM PC.
The system includes a hardware interface (set #9750, "Interface A"), a
card or cable (differs for each computer; the PC-ISA card is set #9771),
and various electronic Lego bits (sensors, lights, motors, etc., the
main set of which is #9700.)
I recently acquired several of the PC-ISA version. I am selling these as
a bundle: 1x-9750, 1x-9771, 2x-9700. The price is $400 + s/h from New
Jersey.
Full details about the sets are on my website,
www.brickhacks.com. The
site isn't finished and some links will not work, but the meat of it is
all there. I'll also be posting how-to videos on YouTube
(@TechnicallyEvan) but I can't promise when that will happen -- I'm very
busy in real life.
All of the manuals are on the Internet Archive, under the "vintage Lego
robotics" collection.
Interested buyers should send me a private message to evan(a)snarc.net.