Here are Disch's original notes: ======================== = Mapper 231 = ======================== Example Game: -------------------------- 20-in-1 Registers: --------------------------- $8000-FFFF: A~[.... .... M.LP PPP.] M = Mirroring (0=Vert, 1=Horz) L = Low bit of PRG P = High bits of PRG PRG Setup: --------------------------- Note that 'L' and 'P' bits make up the PRG reg, and the 'L' is the low bit. $8000 $A000 $C000 $E000 +---------------+---------------+ | $8000 AND $1E | $8000 | +---------------+---------------+
Categories: Mappers with CHR RAM, Multicart mappers, INES Mappers