Commodore built this prototype UNIX workstation/server computer in the same time frame as the Amiga and their PC-Clone and then decided that they only had production capacity for two out of three, and the CBM900 lost.
All the approx 300-500 prototypes were recalled for destruction, but due to some kind of “mistake” this particular machine, which was on loan to a favored customer in Denmark, never made it back.
The machine resurfaced when this company cleaned up their basement, and sent 3 euro-pallets of Commodore artifacts our way.
I never knew Commodore tried to build a UNIX workstation. I shouldn’t be surprised though; virtually everyone dabbled in UNIX workstations in the ’80s. This page has more information about the CBM900.
In 1990 Commodore released an A3000 variant as a dual booting Unix workstation. It dual booted AmigaOS/Workbanch and a licensed port of AT&T Unix System V.
In typical Commodore fashion it was half baked; no way to run Amiga programs on the Unix side, no way to access the unique features of the Amiga’s chipset from Unix, and no features added to AmigaOS to access the Unix side (e.g. not even an X11 server). It also cost as much as a pizzabox NeXTStation. Still, Sun was interested in licensing it from Commodore as a way to fill in the low/mid range of their product lineup.
I remember using one at the local Amiga shop when I was in college. I was raised on micros, so my experience with Unix at the time was pretty much nonexistent. I didn’t quite understand the usefulness of it. The lackluster sales of that model indicate I wasn’t the only one.