@BigBenAussie,
You've sold us on the idea! You are hereby deputized to create a NEW MAC-Style Uboot-replacement . . . code ALL changes, and device-drivers, so as to use the hardware . . .
negotiate (and PAY?) licencing with Apple to make this legal!
Of course, you'd FIRST have to convince Apple that this is in their interests, and get them to obtain an AmigaOne/AmigaOS4 licencing deal!
Hop to it! ;-)
