Standard MMC5 board.
Max. 512K PRG ROM.
Max. 256K CHR ROM.
8K of battery-backed WRAM.
8K of non-backed WRAM.
This is an interesting board. It fills up the entire cart shell, and contains 16K of WRAM.
8K is battery backed, while the other 8K is not. It uses the MMC5 to control battery-backup.
This board is from the cart Uncharted Waters.