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I had similar many years ago in a custom paint shop. We had an expensive colorimeter that interfaced over serial with a program that ran in DOS.

When the pysical computer gave out, I replaced it with a reasonably new one but instead of using a modern OS I installed MS-DOS in order to get it up and running as reliably and quickly as possible.

If I were doing the same today, I'd likely get a new computer and install FreeDOS.




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