NES 2.0 Mapper 449 denotes the circuit board used for the Super Games King multicart mounting 1 MiB KiB of PRG-ROM plus 32 KiB of 8-KiB-banked CHR-RAM. It is similar to NES 2.0 Mapper 380, with the bit positions moved around somewhat, and an additional data latch to select the CHR-RAM bank.
A~[1... ..mQ OQQP PpMS] D~[.... ..CC]
|| |||| |||| ++- CHR A14..A13
|| |||| |||+-0: PRG A14=p
|| |||| ||| 1: PRG A14=CPU A14
|| |||| ||+- 0: Vertical mirroring
|| |||| || 1: Horizontal mirroring
|+-|+++-++-- PRG A19..A14
| +-------- 0: When CPU A14=1: PRG A16..14=111 (UNROM)
| 1: When CPU A14=1: PRG A16..14=PPp (NROM)
+----------- 0: PRG A3..A0=CPU A3..A0
1: PRG A3..A0=Solder pad 3-0
Power-on value: 0
Effective meaning:
Bit 7 Bit 0 Meaning $080s $001s (O) (S) 0 ? Switchable inner 16 KiB bank PPp at CPU $8000-$BFFF, fixed inner bank #7 at CPU $C000-$FFFF (UNROM) 1 0 Switchable 16 KiB inner bank PPp at CPU $8000-$BFFF, mirrored at CPU $C000-$FFFF (NROM-128) 1 1 Switchable 32 KiB inner bank PP at CPU $8000-$FFFF (NROM-256)
Categories: Mappers with CHR RAM, Multicart mappers