I've made an early version of a Sega Genesis/Mega Drive emulator written in Zig and C. At the moment, it's far from finished (for example, sound fidelity isn't very good right now), but it boots some games with good compatibility. In any case, if you're interested, the project is available on GitHub (here: https://github.com/pixel-clover/sandopolis).

Feedback is welcome.

Disclaimer: I'm very new to emulation, and this is my first attempt to build a retro gaming emulator.