NES 2.0 Mapper 310

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.

Banks

• CPU $8000-$FFFF: Switchable PRG-ROM banks (8/16/32 KiB)
• PPU $0000-$1FFF: Switchable 8 KiB (out of 32 KiB) of CHR-RAM that can be write-protected
• Nametable mirroring: Switchable horizontal/vertical settings

Data Latch ($8000-$BFFF, write)

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

Address and Data Latch ($C000-$FFFF, write)

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.