NES 2.0 Mapper 323

NES 2.0 Mapper 323 is used for Farid's homebrew 8-in-1 SLROM multicart board. It consists of an MMC1 (clone) with WRAM replaced by an outer bank register. Its UNIF board name is FARID_SLROM_8-IN-1.

Outer Bank Register ($6000-$7FFF, write)

Mask: $E000

D~7654 3210
  ---------
  .OOO L...
   ||| +---- 1=Disable decoder (lock Outer Bank)
   +++------ Select 128 KiB outer PRG-ROM and CHR-ROM bank

WRAM must be enabled in the MMC1's registers for writes to be effective.

MMC1 registers ($8000-$FFFF)

See INES Mapper 001.

See also

NesDev discussion