Oh wow. I built that circuit, on perfboard, with wire-wrap, using parts from a TI-99/4A, some summer in the late eighties. I had intended to drive it from the

Oh wow. I built that circuit, on perfboard, with wire-wrap, using parts from a TI-99/4A, some summer in the late eighties. I had intended to drive it from the joystick ports of an Atari 800XL. I struggled to get it working, went back to school, and it may still be sitting in a box at my parent's house. If I could find it it would be a hoot to bring up with a modern microcontroller.