NES 2.0 Mapper 338

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NES 2.0 mapper 338 is used for a 16-in-1 and a 200/300/600/1000-in-1 multicart. Its UNIF board name is BMC-SA005-A.

Address Latch ($8000-$FFFF, write)

Mask: $8000

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

Similar mappers

INES Mapper 200 is similar but with the mirroring bit's meaning flipped, and the mirroring bit being also used as a fourth bank bit.