NES 2.0 Mapper 453 denotes the Realtec 8042 multicart circuit board, used for the 3-in-1 1995 World Competitive Champion Edition (DG-002) multicart. It supports both AOROM and UNROM banking modes.
D~[.PpM .BBB]
||| +++- PRG A16..A14 in UNROM mode,
||| PRG A17..A15 in AOROM mode
||+------ Mirroring
|| 0=V, 1=H in UNROM mode,
|| CIRAM A10 in AOROM mode
++------- Lock Pp if either bit is set
|+------- PRG A17 in UNROM mode
+-------- PRG A18
+-------- PRG banking mode
0=UNROM, 1=AOROM
Categories: Mappers with CHR RAM, Multicart mappers