Amiga Resource shows Tandem as "no autobooting capability," or thereof. Has anyone devised a hack to make this bootable?
I'm afraid this won't happen.
It would require quite a bit more than just a hack: The device driver would need to be onboard ROM so that it would be available at the boot time.
Considering the board has no ROM to speak of (except the minimal stuff required for AUTOCONFIG(TM)) it's somewhat hard to add this feature. It also is unlikely the device driver is ROMable in the first place.