PC Engine/Turbo Grafx Importmod, question

[Moosmann]

As far as I know, this Mod works with USA and JPN systems:
http://www.massystems.com/TD-Mod.html

However, I heard some japanese PC Engine (white) and GT are not modable and need additional a small modification.

Some infos about this ?

Bye Markus

[NFG]

I don't know about the efficiency of that mod, but I do know that all PC Engine systems are the same.  If this mod works on one, it'll work on them all.

[Moosmann]

Hmmmm.....but what`s this for a mod ?
http://www.gamesx.com/importmod/necjapmod.htm

Do I also need this mod + the other mod for japanese systems ?

Bye Markus

[Moosmann]

I answer my question myself today

To Play US games on a jpn System, I need the Pinconnector and also Pin 29 to GND Mod.

Bye Markus