When i got my HOTD2 the original Motherboard was dead and it was converted to a White Naomi 1 motherboard, I was told it was a special revision so if anyone needs any details from this then just let me know.
I suppose i could also test netbooting to this motherboard to see if the current dumps of it work on this board.
Game works perfectly fine, I have a feeling it is the same Naomi board that runs in the 3 screen deluxe cabs that use extra naomi's to power the extra screens, seem to remember reading somewhere that its a slightly different chipset being used but could be wrong will need to check.
Andy