Wow, I've just found out about the Takeshi's Castle LCD game and I really wonder how would it be possible to make it work in MAME:

Its display must be manipulated whenever the character enters an underground passageway, which somehow makes the colors get inverted to make it look like a dark room.

Pretty original stuff for an LCD.

LCD artwork scans and cleanups:!uFYSzK7S!U-lJon9jsqyoCX_3y7_KLA