NES 2.0 Mapper 312

From Nesdev wiki
Jump to: navigation, search

NES 2.0 Mapper 312 is used for Kaiser's bootleg version of Highway Star. Its UNIF board name is UNL-KS7013B.

Banks

  • CPU $8000-$BFFF: Switchable 16 KiB PRG-ROM bank
  • CPU $C000-$FFFF: Fixed 16 KiB PRG-ROM bank #7
  • PPU $0000-$1FFF: Unbanked 8 KiB of CHR-RAM

Registers

PRG-ROM Select ($6000-$7FFF)

Mask: $E000

D~7654 3210
  ---------
  .... .PPP
        +++- Select 16 KiB PRG-ROM bank at CPU $8000-$BFFF

Nametable Mirroring Type Select ($8000-$FFFF)

Mask: $8000

D~7654 3210
  ---------
  .... ...M
          +- Select nametable mirroring type
              0: Vertical
              1: Horizontal