Here is a video of a program that I wrote many years ago. I have not been able to find it in my files, but I recently bought the Cyc from CADD and it was in there, in the Chicago UG files. Very cool to see it again. I captured this video with the MAME TI-99/4A Emulator. The file is available in the downloads section in case you want to run it on a real iron TI, or an emulator.