Wow, what a coincidence. I just ordered a used SC88 as well. I also have an old Yamaha MU90 that is similar, and I plan to use both with my X1000 using BarnsPipes, and I guess I could also do same with my A1200 since I just dug out my old Midi Master interface, which attaches to the classic Amiga serial port.
Both the Yammy and Roland modules have dual MIDI inputs for 32 voices, and I have a 4x4 USB MIDI interface on the way too. I saw the PC/Mac serial connections and switches on the Yammy and assumed they would be no use to me on any Amiga gear ... but I will watch this trhead and maybe learn otherwise.
I am connecting to the OS4.1 machine with MIDI cables.