iNES Mapper 201 has been assigned to a multicart mapper designed to contain multiple NROM-256 games. It acts like BNROM and CNROM overlaid, where one bank number controls both 32 KiB PRG banks and 8 KiB CHR banks, except it uses the address bus instead of the data bus.
Here are Disch's original notes: ======================== = Mapper 201 = ======================== Example Games: -------------------------- 8-in-1 21-in-1 (2006-CA) (Unl) Registers: --------------------------- $8000-FFFF: A~[.... .... RRRR RRRR] R = PRG/CHR Reg CHR Setup: --------------------------- $0000 $0400 $0800 $0C00 $1000 $1400 $1800 $1C00 +---------------------------------------------------------------+ | $8000 | +---------------------------------------------------------------+ PRG Setup: --------------------------- $8000 $A000 $C000 $E000 +-------------------------------+ | $8000 | +-------------------------------+
All known games on this mapper use only the two least significant bits (128KiB PRG / 32KiB CHR).
Categories: Multicart mappers, INES Mappers