[jhbadger]

The Osborne wasn't an MS-DOS machine but an 8-bit CP/M machine, which was the standard for generic computers at the time (Apple, Commodore, etc. had their own non-compatible systems, but you could for instance buy a Z80 card for an Apple to run CP/M on it and the Commodore 128 likewise had a Z80 built in for running CP/M besides its native 6502 and OS).

[vidarh]

The Commodore 128 was first in 1985. But there was also a CP/M cartridge for the C64 released in 1983[1], which I think was the first Commodore CP/M compatibility play. It is very disturbing (as an old C64 user) to see CP/M running on the classic blue/light-blue C64 display.... Of course the C64 version suffered from the additional problem over the C128 version that it only had 40 text columns. Lots of other issues with it too apparently.

[1] https://commodore.international/2021/12/21/cp-m-for-the-comm... and https://www.pagetable.com/?p=1312