This interesting hardware is running Coherent which is a Unix clone.
Here is the FOSDEM 2025 presentation : if you have a (rare!) Commodore C900, this could be of some help.
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I remember seeing ads for Coherent in magazines in the 1990s.
Nice! I’d seen rumours that 16 bit Coherent had run on architectures other than the 80286, and this pretty much confirms it (although if the version numbers are accurate, the 0.7.3 version in this video way precedes their last 16 bit release, 3.2).
I’m in the throes of recovering the source code to Coherent 3.2 as one of my (many) side projects from a couple of recovered disk images. Remember how early Unix file systems were laid out has been a nostalgic trip down memory lane, with all the associated muggings. 
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Thanks for posting that. As a Commodore 900 owner, I hadn’t seen that session. That would be a very challenging task and if anyone could figure out how to do it, Michal could. My own hard drive actually had some bad spots on it so I had to back it up with an MFM Emulator, manually modify the file and write it back to the drive. I have my drive backed up on one other physical hard drive and have it available to anyone who needs it. They all came with a Miniscribe 3425 20MB MFM hard drive but the controller is custom to the C900 as is the floppy drive. There are no replacements for either unless they come out of another C900 so they are rare.
I could go on and on but thank you for pointing out that session. If I had mine when Michal did his work, I would have gladly shared information with him. I had gotten mine later. More info and a couple of demos of mine running here, if anyone is interested: Commodore 900: The Unix-like workstation/server that was eclipsed by Amiga – VintageComputer.ca
Santo
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