Dunno if this post on the sega-naomi boards is any use to you; http://www.sega-naomi.com/forum/viewtopic.php?t=4247&sid=b3ec7784912b9f3cb828951ac92627c7
they share the motherboard, just video card and cpu are different, you can easy buy a new card from AGS and let's all lidbergh color play all lindbergh games, you need a 3000 P4 cpu too....
OS is on the CF card in the unit which varies depending upon the flavor. Yellow - Linux based, Standard spec Silver - Satellite unit version of Yellow Red - Linux based, Low spec (lower end CPU and video card) Red EX - Same as Red with double the memory Blue - Windows version of Red Some games will not work on certain vanilla mobos without hardware changes.