The Multiple Arcade Machine Emulator, now known simply as MAME ... take a look at this build which implements ray tracing on a TI-84 Plus CE.

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.

To wit: A modder posted a YouTube video showing how they got ChatGPT running on a TI-84 calculator. Now, how in the world ...