I
tried running it off of my Powermac 6500/275 and it does open, but the midi file opening+parsing process freezes the machine.
I've never targeted powerpc and/or 68k running on powerpc before with my code, so this is well above my paygrade to attenpt to fix.
Same with the quick "send middle C note" with my menu, locks the machine. It must be a significantly different serial chip by then.