NES 2.0 Mapper 541 denotes the Korean 리틀컴 (LittleCom) 160-in-1 multicart.
Mask: $C000
A~FEDC BA98 7654 3210
-------------------
11.. .... PPPP PpBM
|||| |||+- Nametable mirroring
|||| ||| 0: Horizontal
|||| ||| 1: Vertical
|||| ||+-- Set PRG A14 behavior
|||| || 0: PRG A14=CPU A14 (NROM-256)
|||| || 1: PRG A14=p (NROM-128)
++++-++--- Set 16 KiB PRG-ROM bank (PRG A14..A19)
at CPU $8000-$BFFF/$C000-$FFFF,
p replaced with CPU A14 if B=0
Categories: Mappers with CHR RAM, Multicart mappers