Tetris DX:ROM map

Address       Size    Notes
-------       ----    -----
A747-A7C6     80      BG and OBJ color palettes for Marathon
F1DC-F25B     80      BG and OBJ color palettes for Ultra
A7C7-A846     80      BG and OBJ color palettes for 40 Lines
F25C-F2DB     80      BG and OBJ color palettes for VS Com / Link