We were given an expensive device (X-ray fluorescence analyzer) that had a dying computer.  The instrument had an ISA bus card to interface to it.  I cloned the hard drive, and tried to get it to boot properly on a new "industrial" computer that had ISA slots. The original OS was DOS 3.1  That didn't work well, so we got a DOS 7.1 install disk, and had to do a bunch of magic to get the ANSI graphics support loaded properly, but then the whole thing worked!

I have a Samsung-built pick and place machine at home that runs Windows 95, because the user-mode control program talks directly to the hardware (a Motorola 68040 VME board connected through a dual-port memory).

So, both of these systems require ANCIENT OS versions.

Jon

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