A PCI Mac-on-X Card, like the old DOS-on-Mac Cards probably makes more sense. Run the "real" hardware with "real" ROMS and throw the display up in an OSX window. All the I/O would just need to look like SCSI or RS-422. ADB emulation on a Mac-on-X Card could be a problem though, that still needs to be licensed from Apple. Serial works just fine for KBDs, Mice, Trackballs, Digitizer Pads etc.

Dunno, hardware is always easier than software . . . especially so with existing firmware and software libraries . . . at least in my experience.

A 68k/PPC ThunderBolt MacBoX™ might be an interesting toy, now that I think about it. [}] ]'>