This is Supafaust, the libretro port of Mednafen's experimental snes_faust module, a faster eventual replacement for its old bsnes-based snes module (which forms the basis of the Beetle bSNES core). It's particularly suitable for low-end devices, such as multicore ARM Cortex A7,A9,A15,A53 Linux platforms.
If you run into any problems with it, please don't bother upstream. Go to the libretro forums and we'll try to help you as best we can.
Many thanks to the author(s) for working on this emulator :)
Minimum recommended CPU is a dual-core CPU, running at 900MHz for most SNES games, and at 1200MHz for SuperFX, SA-1, and CX4 games.
Special chips supported: DSP-1, DSP-2, CX4, SuperFX, SA-1, S-DD1, MSU1
MSU1 support may have performance issues with runahead and/or state rewinding.
SPC playback is supported, to an extent.
Save states are not currently compatible across different architectures (e.g. 32-bit ARM vs 64-bit ARM).
Save states are not currently sanitized properly on load, so don't load save states from untrusted sources.
Core option changes take effect upon game load.
Setting "supafaust_frame_begin_vblank" to "disabled" will improve performance but also increase input lag on most games.
Setting "supafaust_thread_affinity_emu" to "0x3" and "supafaust_thread_affinity_ppu" to "0xc" may give better performance on a quad-core CPU.
Setting "supafaust_renderer" to "st", to disable multithreaded PPU rendering, may improve performance on systems with only a single CPU with a single core.