NES 2.0 Mapper 289

NES 2.0 Mapper 289 is used for at least three multicarts designated in UNIF as BMC-60311C.

(EW-16-1) Super HiK 17-in-1
1995 Champion Cassette 1200-in-1 - 94年超值珍藏版
Super 76-in-1 (with Contra)

Mode Register ($6000), write

D~[.... MLPP]  Address mask: $E001
        ||++- PRG Banking Mode
        ||     0: NROM-128: PRG A14-A16 from Outer Bank Register
        ||     1: NROM-256: PRG A15-A16 from Outer Bank Register, PRG A14=CPU A14
        ||     2: UNROM: PRG A14-A16 from Data Latch when CPU A14=0, and 111b when CPU A14=1
        ||     3: PRG A14-16=1 regardless of CPU A14
        |+--- Protect CHR-RAM
        |      0: CHR-RAM writable
        |      1: CHR-RAM write-protected
        +---- Select nametable mirroring type
               0: Vertical
               1: Horizontal

Outer Bank Register ($6001), write

D~[.QQQ QPPp]  Address mask: $E001
    ||| |||+- PRG A14 in NROM-128 PRG Banking Mode
    ||| |++-- PRG A16..15 in NROM-128/-256 Banking Modes
    +++-+---- PRG A20..A17

Solder Pad Register ($6000, read)

D~[.... ..PP]  Address mask: $E000
   |||| ||++- Solder pad setting
   ++++-++--- Open Bus

Data Latch ($8000-$FFFF), write

D~[.... .PPP]  Address mask: $8000
         +++- PRG A16..14 in UNROM PRG Banking Mode when CPU A14=0

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