☕ David Antoine For any hypothetical Texas Instruments calculators fans here, I found that : knightos.org

John Olinda Unfortunately, "Warning! KnightOS isn't done, and you may be underwhelmed. KnightOS has no math or graphing support past a simple 4-operation calculator. Additionally, note that installing KnightOS will erase your RAM and TI-OS Archive. Proceed with caution." That bit about math support was a little bit of a let-down, but I might still try it on one of our spares just for fun.