NES 2.0 Mapper 375

NES 2.0 Mapper 375 denotes a circuit board with unknown ID, used for a 135-in-1 2 MiB multicart containing NROM and UNROM games, some of which are modified to run in a UN1ROM configuration.

Outer Bank register ($8000-$FFFF, write)

A~FEDC BA98 7654 3210
  -------------------
  1LO. UaVb .ccd ddMW
   ||  +|+|--|||-|||+- UVW  PRG-ROM banking mode
   ||   | |  ||| |||   x00: NROM-128
   ||   | |  ||| |||   x01: NROM-256
   ||   | |  ||| |||   01x: UN1ROM
   ||   | |  ||| |||   11x: UNROM
   ||   | |  ||| ||+-- 0: Vertical mirroring
   ||   | |  ||| ||    1: Horizontal mirroring
   ||   +-+--+++-++--- abccddd: PRG A14..A20. ddd must be 0 in UN(1)ROM mode.
   |+----------------- 0: Override CPU $C000-$FFFF with 16 KiB ROM bank #0
   |                   1: Do not override CPU $C000-$FFFF
   +------------------ 1: Lock Outer Bank register