NES 2.0 Mapper 429

NES 2.0 Mapper 429 is for Milowork FCFC1 flash cartridge. There is some doujin game in progress using this mapper.

Overview

• PRG ROM size: 512 KB
• PRG ROM bank size: 32 KB
• PRG RAM: None
• CHR capacity: 32 KB RAM, optional battery-backup or FeRAM
• CHR bank size: 8 KB
• Nametable mirroring: vertical or horizontal selected by switch
• Subject to bus conflicts: No

Registers

Bank select ($8000-$FFFF)

7  bit  0
---- ----
xxPP PPCC
  || ||||
  || ||++- Select 8 KB CHR RAM bank for PPU $0000-$1FFF, initial bank 0
  ++-++--- Select 32 KB PRG ROM bank for CPU $8000-$FFFF, initial bank 1