Hi all,
I'm so happy to announce that there is finally an alternative to performing modifications on your PC Engine to play TG16 games. Over the past year, I've been working with db Electronics on an updated converter board.
For TG16 owners, the big improvement over the previous db TG16 converter is that there is no longer the switching system that interferes with devices such as the Super System Card. We call the completely passive model "PC Henshin" (as a pun on PC Engine -- it "transforms" a TG16 into a PC Engine).
For PCE owners, we've made a version with a chip that patches out the region check in real-time, leaving the rest of the game untouched. We call this "PC Henshin Turbo" and it should go on sale in the coming weeks, now that the prototype is functional. I've tested it with 8 titles so far, but based on our research, if it works for those titles, it should support the entire TG16 library.
A picture and a short video of it working is now posted at
http://www.db-elec.com/home/News/dontmodthatpc-engine-pchenshinturbooffersmodlessalternativetoregionmoddingbothpceandtg16 for your enjoyment. Personally, I was thrilled to get this working, because I foolishly sold my TG16 as a child, and I later regretted it and bought a PC Engine and a ton of games when I lived in Japan. I don't like modding classic consoles, myself, so I was happy to be able to play Keith again for the nostalgic value (because I never picked up Mashin Eiyuuden Wataru... but if I'd done that, maybe I wouldn't have been as motivated to get this going!)
Anyway, this is basically just a heads-up that this is coming real soon!