JoeAtari, it would be interesting to know if you have any luck with setting up a printer switch box. Use a mechanical one of course! I can't understand why Saturnin51's switch box didn't work. In theory, if you switch all 10 lines it will be exactly the same as replugging the cable. But it's possible some switchboxes might be cheap and only switch the strobe+busy lines - in which case it definitely won't work with the SMP24/II.
You do have to watch out with cable length on the printer port. You want to keep it as short as you possibly can, below 3 metres. If you go over that, exactly what happens depends on the cable characteristics speed of the machine and luck. All sorts of weird results could occur!
Do you use the SMPTE I/O feature of the SMPII? Or the two MIDI inputs? I'm working on cloning the Friend Chip MM1 8-output MIDI interface device for the Atari, which should work in Cubase and CAF. I was thinking of adding support for the SMPII protocol also to gain access to the two MIDI inputs, but it looks tricky. Latest progress is visible in this thread http://www.atari-forum.com/viewtopic.ph ... &start=100
Do you get the "black screen" problem if you connect your Macintosh interface to the Falcon before Cubase has started? I heard about that in the documentation, but not owning a Falcon I've never been able to test it. I suppose the Macintosh interface would also function on the MegaSTE and TT.
What's weird is that it seems nobody wrote drivers for those rackmount 8 I/O Macintosh MIDI expanders that were popular in the late 90s? I can't see any reason why it wouldn't work on the Falcon/TT/MegaSTE. But then again the performance of those devices aren't very good when outputting dense MIDI events.