INES Mapper 159

iNES Mapper 159 is used for Bandai FCG boards with an LZ93D50 ASIC and a 128-byte serial EEPROM (X24C01). The 128 bytes must be denoted as PRG-NVRAM in the NES 2.0 header using byte value $10.

Game List

• Dragon Ball Z: Kyoushuu! Saiya-jin
• Magical Taruruuto-kun: Fantastic World!!
• Magical Taruruuto-kun 2: Mahou Daibouken
• SD Gundam Gaiden - Knight Gundam Monogatari

Banks

• CPU $8000-$BFFF: 16 KiB switchable PRG ROM bank
• CPU $C000-$FFFF: 16 KiB PRG ROM bank, fixed to the last bank
• PPU $0000-$03FF: 1 KiB switchable CHR ROM bank
• PPU $0400-$07FF: 1 KiB switchable CHR ROM bank
• PPU $0800-$0BFF: 1 KiB switchable CHR ROM bank
• PPU $0C00-$0FFF: 1 KiB switchable CHR ROM bank
• PPU $1000-$13FF: 1 KiB switchable CHR ROM bank
• PPU $1400-$17FF: 1 KiB switchable CHR ROM bank
• PPU $1800-$1BFF: 1 KiB switchable CHR ROM bank
• PPU $1C00-$1FFF: 1 KiB switchable CHR ROM bank

Registers

All registers function the same way as INES Mapper 016, submapper 5, except that the serial EEPROM is not a 24C02 but an X24C01. The X24C01 has operational differences compared to a 24C02 and 24C01. Bandai's developers consistently thought the X24C01 was a little-endian device, and their code clocks in address and data bytes assuming this. However, it's actually a big-endian device, and a multi-byte read or write from EEPROM will increment the address accordingly.