NES 2.0 Mapper 310 denotes the K-1053 circuit board, used for the 1200-in-1 New World Multi multicart. It is an extension of INES Mapper 015 that supports more than 1 MiB of PRG ROM, and 32 KiB rather than 8 KiB of CHR RAM.
Mask: $C000 D~7654 3210 --------- pMPP PPPP ||++-++++- PRG A19..A14 |+-------- Nametable mirroring +--------- PRG A13 if SS=2, ignored otherwise Power-on and reset value: All bits clear
Mask: $C000
A~FEDC BA98 7654 3210 D~7654 3210
------------------- ---------
11.. .... .... PPSS .... ..CC
|||| ++- CHR A14..A13
||++-------------- PRG banking mode
|| 0: NROM-256 (PRG A14=CPU A14)
|| 1: UNROM (PRG A14..16=111 when CPU A14=1)
|| 2: NROM-64 (PRG A13=p)
|| 3: NROM-128
++---------------- PRG A21..20
Power-on and reset value: All bits clear
CHR-RAM is write-protected in PRG banking modes 0 and 3, and write-enabled in modes 1 and 2.
Categories: Mappers with CHR RAM, Multicart mappers