As already noted under the UD tab Igel's UD2 range has been through a number of generations. Anything described as a UD2 could be one of various bits of hardware. Here's my best guess.
Generation Launch Date Model Hardware clock CPU 2 January 2009 UD2-x2x D200 400MHz VIA Eden ? ? UD2-??? D200 500MHz Via Eden ? ? UD2-??? D210 500MHz Via Eden ? ? UD2-??? D210 1GHz Via Eden ulv ? ? UD2-??? D510C 1GHz ARM Cortex A8
Of these I have seen:
Any comments? email me. Added May 2015 Last update May 2018