NES 2.0 Mapper 262

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NES 2.0 Mapper 262 is used for Street Heroes/侍魂 (Shìhún) by Sachen. It uses an MMC3 clone with both CHR-ROM and 8 KiB of CHR-RAM, as well 4 KiB of additional VRAM for four-screen mirroring. Its UNIF board name is UNL-SHERO.

Registers

Mask: probably $E001

   $8000, $8001, $A000, $A001, $C000, $C001, $E000, $E001: As normal MMC3.

Mask: unknown, but probably $C100

$4100 (read): Read jumper setting
   Bit 7654 3210
       ---------
       J... ....
       +--------- Jumper value
                  0: Game title is Street Heroes
                  1: Game title is 侍魂 (Shìhún) (Samurai Spirits)

$4100 (write): High CHR-ROM bits and CHR-ROM/-RAM selection
   Bit 7654 3210
       ---------
       .M.. 8421
        |   |||+- Select 256 KiB CHR-ROM bank at PPU $1000-$17FF
        |   ||+-- Select 256 KiB CHR-ROM bank at PPU $1800-$1FFF
        |   |+--- Select 256 KiB CHR-ROM bank at PPU $0800-$0FFF
        |   +---- Select 256 KiB CHR-ROM bank at PPU $0000-$07FF
        +-------- Select CHR-ROM/-RAM
                  0: CHR-ROM
                  1: CHR-RAM