I see the System 256 has an online game called Druaga Online. Now I know the game wont work online anymore as the site says the online functions have been shut down and it says you can still play in offline mode. However is the PC side of system needed? Specifically this: http://guru.mameworld.info/oldnews2010.html (scroll down a bit).
It's a side project of mine to get touch 256 games running for personal use but i'm in a few snags, Most require IC readers and if you don't have the proper one the game wont boot. I do have a druaga IC but since they changed out the IO system I don't have a way of plugging it up. I do have the guts (minus the proper IC reader) for Minnade Kitaeru Zennou Training which in theory should let me run everything else (idolmaster, dragon chronicles, and training). It might be enough to trick Druaga to boot but again until I can track down the IC reader I need for Training I won't be able to find out (It's not just having the hw but also the proper FW for the reader). -edit- I should add that I have the following touch based game software) IdolMaster - Terminal, Ver.D Dragon Chronicles - Server & Terminal Dragon Chronicles Online - Server & Terminal Minnade Kitaeru Zennou Training - Terminal (I might have server but I don't remember atm), 1.0, 1.5 & 1.6 Druaga Online - Terminal 1.0 - 1.65 (minus a select few).