|The mystery board complete with heatsink|
|A close up of the board with the heat sink removed. Source: Assember Games|
|You can see the 'Katana Simple Checker' text on the main board. Source: Assembler Games|
As stated, there are people far more knowledgeable than I already discussing the possible uses for this Dreamcast over at the Assembler forums, but I thought this was worth bringing to the attention of the Dreamcast community at large in case someone out there has any more information on it.
Source: Assembler Games