Mapper 251

The following ROM from GoodNES3.14 is listed as Mapper 251:

Multi-Game Pirate Carts.7z <Super 8-in-1 99 King Fighter (Unl).nes>

That mapper does not appear to work in any emulator. It looks like it's a variant of Mapper 45.

Does anyone have more information about this mapper or the origin of this ROM?

<Super 8-in-1 99 King Fighter (Unl).nes>?
Well, my first hunch was right, CaH4e3 did at least something, but I can't really find any more on it.

…then FCEU Bizhawk source says that SuperHIK8in1 is completely unaltered mapper 45.
So I expect the ROM is just a CHR-bank-shuffled mapper 45?

edited: some information found

this is BMC-SuperHIK8in1,mapper 45 submapper.


but this rom have two version.

1.SMYNES 1.20 only rom,Chr swap.
2.any emu rom

this rom working nestopia,fceux,fceumm

What difference?

no difference,pcb difference.

What difference between the PCBs?
Address lines connected different?