charles wrote:these listed files are just drivers from Cubase.
The drivers reveal an enormous amount about how MROS actually works. The original poster's objective was to be able to program the various Atari MIDI expanders. This can be done through MROS, but it's probably much better to program them directly. MROS appears to be very slow, you wouldn't want to use it unless you really had to.
Another possibility is just loading the MROS drivers into your own program - without MROS at all. All the MROS drivers expose some very well-defined hooks, so it should be possible to mimic what MROS does.