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Looking for a 286 operating system

I got myself a 286. A small tower PC made from collected parts from here and there, a clock display and turbo button, but a motherboard that doesn't seem to have a turbo mode. An MFM hard drive, Mitsumi CD-ROM drive, two floppy drives, a VGA card, IO card, a damaged case. It looks like I could have built it from parts I found here and there. I reckon that's how it was built. It's the first working 286 that I had since I so stupidly through out my IBM PS/2 Model 30. Well, it wasn't that stupid at the time. It was a conscious decision. But anyway. The only other time I had a 286 board was when somebody gifted me their old PC because it was both worthless and broken. The CMOS battery had leaked and I didn't know enough about electronics to make it work, had nobody to ask and internet wasn't really a thing back then.

I had been looking for a specific model before: A Peacock 286 desktop. But Not only didn't I find one for sale so far, I'm pretty sure it would cost more than I'd be willing to pay for a vintage PC just so I could own the same PC model that was the first computer I ever used (for homw work in first grade). The first computer I had contact with was an Olympia People. I didn't even look for one of these because it would be a serious collector's piece and be respectively priced.

So I got just any working 286 PC; just to fill the gap in what I therefore should now start to call my collection of vintage hardware. It just happened to be one with a working MFM hard disk. As if I didn't already have enough unfinished and unstarted projects now I even payed money to buy me another one. Because now I have to do something with this machine, obviously. I bought it weeks ago and it's getting bored.

I thought about what OS I might want it to run. MS-DOS would be the obvious choice. Too obvious for my taste. CP/M after that. But that's too similar. I want something different. But I don't even know what other systems exist that run on a 286. Linux should be out. (Although I haven't yet looked if somebody has made some part of the kernal work on a 286. I doubt it though. No extended mode, no multitasking.) IBM AIX wasn't available for the 286 models either. Are there other Unix clones or versions that run on a 286? Of course there are. I just don't know them. Prologue comes to mind. And Xenix. What others are there? Which one should I try? I could test MikeOS on it.