Took years of searching and all it required was a popular r/hardwareswap post but I got this last year. Very unique machine in my collection. It runs OpenBSD and some Linux distros (with a bit of hacking.)
Willing to go into more depth if people are interested.
There’s some cpu bugs OpenBSD patched and the boot loader is pretty unique. The only Linux distro with comparable support is Debian and I haven’t gotten the images to work.
OpenBSD has official support though so it’s the easiest to get working. However the cpu is extremely slow so getting new software in the repos is difficult.