Preliminary support for Benesse Pocket Challenge V2 (ベネッセ ポケットチャレンジV2)

[makigumo]

The Benesse Pocket Challenge V2 is basically a WonderSwan for the japanese educational market. So it is probably only useful for users with japanese language skills.

Button mapping is different

• Up, Down, Left, Right
• Pass -> A
• Circle -> B
• Clear -> Y
• View -> Start
• Escape -> Select

[RobertPeip]

This is great, thanks a lot for adding this!

I will try with your changes tomorrow and merge afterwards.

[RobertPeip]

There is a small mistake in the statusbit selection for colormode, but i'll fix it right after merging. Thanks again!