I have a quick question about TurboDuo CD games: Can I play US TurboDuo CD games on a japanese PC Engine with IFU, CDROM² and system card 3.0? I've just bought a TurboDuo CD game and didn't noticed that it's US:-(
As far as I know only Hucard games, have some form of region coding. So you can play your US CD games in your Jap PCE no problem, worked for me so far. Sabre
Technically Hucards are "regionfree" too, US Hucards just have their data pins mirrored from the JP console; the games aren't regionally coded. Many US hucards will refuse to run in a JP system however because the game decided to use a trivial region check against nonmodified JP consoles (so more than a converter is needed)