Super Nintendo

NX Redux ships two Super Nintendo cores, Snes9x and Mednafen Supafaust. You choose one per game by which Roms folder the game is in:

	Snes9x	Supafaust
Folder	Roms/Super Nintendo ES (SFC)/	Roms/Super Nintendo ES (SUPA)/
Strength	Lighter, the default	More accurate, but heavier
Netplay	Yes	Yes
BIOS	None	None
File types	sfc smc swc fig bs st	sfc smc swc fig

Which one to use

Start with Snes9x in the SFC folder. It is the default core and the lighter of the two.

Move a game to the SUPA folder when you want accuracy and the game doesn't behave right on Snes9x. Supafaust is more accurate but heavier. Some games may run less smoothly than on Snes9x, especially on lower-end devices.

More detail

Supafaust spreads its work over several CPU cores.

Satellaview and Sufami Turbo

Only Snes9x opens Satellaview (.bs) and Sufami Turbo (.st) files, so keep those in the SFC folder.

Netplay

Both cores support Netplay, so games with a built-in multiplayer mode can be played together. Both players must use the same folder, and therefore the same core, for the game.

More detail

SNES netplay runs in lockstep mode.

Using both

You can keep the same game in both folders. The game list then shows it twice with the emulator tag, for example Super Mario World (SFC) and Super Mario World (SUPA). Pick the core each time you play (see duplicate names).

Saves are kept per folder, in Saves/SFC/ and Saves/SUPA/. To carry your progress across, copy the game's save file from one folder to the other. Save states cannot move between the two cores.

More detail

Battery saves are written in the RetroArch-compatible .srm format by default, which is why the save file can be copied between the folders.