Atari-Midi Archives

I just spoke with Tim Conrady about interfacing a 1040ST with the OMS 
OpCode Studio 4 MIDI box.  He said to check with anyone on this group 
who does hardware interfacing.  Is there anyone who knows this Studio 
4's hardware?  Most of what I have seen on the web is Mac-related 
software.  I would really like these unit as part of an Atari-based 
system.  It can address up to 128 MIDI devices!