FWIW, in case it's useful, here's a rough, preliminary, work-in-progress, unfinished (you get the idea) disassembly:
http://www.6809.org.uk/tmp/da/ikon/
Ikon Ultradrive Dragonfly TOS V2.3
Re: Ikon Ultradrive Dragonfly TOS V2.3
Nice work!