Quote from: termis on 08/03/2009, 08:14 AMYou HAVE to mod a Japanese Duo to play American HuCards (the converter alone will not work).thanks are there any mod services (in the UK) that install the mod?
You have to lift a pin off of one of the ICs and ground it, THEN you can use the converter to play US Turbografx cards. But if you're going to go through the trouble of doing that (the initial mod), might as well go all the way and also install a switch, which will let you play US cards. Check out the mod pages if you want to find out how.
And you are correct on the CD games -- no converters needed for CD games -- however, you do need the appropriate system cards for certain games. (Arcade Card Duo/Pro for all the ACD games, GameExpress card for the non-licensed CD games, and System card 1.0 for Altered Beast.)