NES 2.0 Mapper 289 is used for at least three multicarts designated in UNIF as BMC-60311C.
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
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
D~[.... ..PP] Address mask: $E000 |||| ||++- Solder pad setting ++++-++--- Open Bus
D~[.... .PPP] Address mask: $8000
+++- PRG A16..14 in UNROM PRG Banking Mode when CPU A14=0
Categories: Mappers with CHR RAM, Multicart mappers