NES 2.0 Mapper 261

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NES 2.0 Mapper 261 is used for the TXC 6-in-1 multicart (MGC-023). Its UNIF board name is BMC-11160.

Data latch

Mask: $8000

Bit 76543210
    M.PP..CC
    | ||  ++- Select 8 KiB (inner) CHR-ROM bank at PPU $0000-$1FFF
    | ++----- Select 32 KiB PRG-ROM bank at CPU $8000-$FFFF, and 32 KiB (outer) CHR-ROM bank
    +-------- Select nametable mirroring, 0=horizontal, 1=vertical
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