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: https://youtu.be/B6Tgxs3Afgg?t=1m4s 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: https://mega.nz/#F!uFYSzK7S!U-lJon9jsqyoCX_3y7_KLA
