You can leave the TI graphing calculator at home thanks to this web-based TI-83 and TI-84 emulator. As with pretty much all emulators, this depends on a ROM image from the actual hardware to work.
The calculator in question is a TI-84 Plus CE model made by Texas Instruments ... He was likely using the graphing calculator solely as an unorthodox controller input, hooked up to a PC running ...