That reminds me I once emulated a NumWorks N0100 [1] and a HP Prime G1 [2] with QEMU, to the point where the emulators managed to run the official firmware.

- [1] https://github.com/boricj/qemu/tree/numworks_calculators

- [2] https://github.com/boricj/qemu/tree/s3c2416-boricj