If you've read the Wasmcraft post you know that Minecraft is Turing complete.
That's all well and good, but Minecraft is so 2012. The future is in RISC-V.
Anyways, here's xv6's shell prompt:
RISC-Vcraft is an rv32sima emulator that runs entirely in Minecraft commands. That means it can run real, actual operating systems (if you wait long enough). The shell prompt above is a user space program, on a time-shared multitasking OS, that has a root filesystem loaded from a real (virtual) disk, that has all the coreutils you'd expect for a minimal teaching unixlike (echo, cat, ls, etc.).
The only caveat is that it takes 11 minutes to boot, which I think is an acceptable cost if your only compute platform is Minecraft.
Also, debugging the emulator got kind of hard sometimes,
so to help myself out I wrote a custom gdb server so that I can use gdb-multiarch
to connect to and debug my datapack running in the game.
