NES 2.0 Mapper 341

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NES 2.0 mapper 341 is used for a simple 4-in-1 multicart. Its UNIF board name is BMC-TJ-03.

Address Latch ($8000-$FFFF, write)

Mask: $8000

A~FEDC BA98 7654 3210
  -------------------
  1... .BBB .... ..M.
        |||        +-- Select nametable mirroring type
        |||             0: Vertical
        |||             1: Horizontal
        +++----------- Select 16 KiB PRG-ROM bank at CPU $8000-$BFFF and $C000-$FFFF
                       and 8 KiB CHR-ROM bank at PPU $0000-$1FFF
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