I was under the impression that they came with BIOS's pre-loaded.. since this is my fifth one from the same person, and the previous ones all had BIOS's.
It's a 1.6, since it has the Xcalibur GPU and Samsung ram (according to the guide on here)
I've tried both Bank 0 and Bank 1 as well... neither work.
I just noticed something else that's strange. Pressing Power or Eject turns the chip on, because the red LED flashes for both...