mesen-s¶


Type	libretro
Classification	Official ports
Source	https://github.com/libretro/Mesen-S
Upstream	https://github.com/SourMesen/Mesen-S
Version	0.4.0
Revision	libretro/Mesen-S@9e4fdeb9b336
Profiled	2026-03-24
Profile	YAML, JSON
Cores	mesen-s, mesen_s
Systems	nintendo-snes, nintendo-gb, nintendo-gbc, nintendo-super-game-boy, nintendo-satellaview

Technical notes

High-accuracy SNES/SFC emulator with Game Boy/Color and Super Game Boy support. Upstream archived at 0.4.0, superseded by Mesen2. DSP firmware can be loaded as combined files (dsp1.rom, dsp1b.rom, dsp2.rom, dsp3.rom, dsp4.rom, st010.rom, st011.rom) or split program/data ROMs. Combined files are tried first, size validated. HLE coprocessor option available for DSP-1/DSP-1B only (libretro core option mesen-s_hle_coprocessor). CX4 is fully HLE, no firmware needed. ST018 detected but not emulated. GB/GBC/SGB boot ROMs fall back to embedded open-source SameBoy boot ROMs when external files are not found.

21 files | 0 required, 21 optional | 21 in repo, 0 missing | 8 with HLE fallback

dsp1.program.rom optional in repo HLE fallback #

Size: 6.0 KB
Validation: size
Source: Core/NecDsp.cpp:95, Core/FirmwareHelper.h:17-35
Collection copy: bios/Nintendo/SNES/dsp1.program.rom
Platforms: lakka dsp1.program.rom, retroarch dsp1.program.rom, retropie dsp1.program.rom, romm snes/dsp1.program.rom
DSP-1 program ROM. HLE fallback in libretro port only

dsp1.data.rom optional in repo HLE fallback #

Size: 2.0 KB
Validation: size
Source: Core/NecDsp.cpp:95, Core/FirmwareHelper.h:17-35
Collection copy: bios/Nintendo/SNES/dsp1.data.rom
Platforms: lakka dsp1.data.rom, retroarch dsp1.data.rom, retrodeck bios/dsp1.data.rom, retropie dsp1.data.rom, romm snes/dsp1.data.rom
DSP-1 data ROM

dsp1b.program.rom optional in repo HLE fallback #

Size: 6.0 KB
Validation: size
Source: Core/NecDsp.cpp:96
Collection copy: bios/Nintendo/SNES/dsp1b.program.rom
Platforms: lakka dsp1b.program.rom, retroarch dsp1b.program.rom, retrodeck bios/dsp1b.program.rom, retropie dsp1b.program.rom, romm snes/dsp1b.program.rom
DSP-1B program ROM. HLE fallback in libretro port only

dsp1b.data.rom optional in repo HLE fallback #

Size: 2.0 KB
Validation: size
Source: Core/NecDsp.cpp:96
Collection copy: bios/Nintendo/SNES/dsp1b.data.rom
Platforms: lakka dsp1b.data.rom, retroarch dsp1b.data.rom, retrodeck bios/dsp1b.data.rom, retropie dsp1b.data.rom, romm snes/dsp1b.data.rom
DSP-1B data ROM

dsp2.program.rom optional in repo #

Size: 6.0 KB
Validation: size
Source: Core/NecDsp.cpp:97
Collection copy: bios/Nintendo/SNES/dsp2.program.rom
Platforms: lakka dsp2.program.rom, retroarch dsp2.program.rom, retrodeck bios/dsp2.program.rom, retropie dsp2.program.rom, romm snes/dsp2.program.rom
DSP-2 program ROM

dsp2.data.rom optional in repo #

Size: 2.0 KB
Validation: size
Source: Core/NecDsp.cpp:97
Collection copy: bios/Nintendo/SNES/dsp2.data.rom
Platforms: lakka dsp2.data.rom, retroarch dsp2.data.rom, retrodeck bios/dsp2.data.rom, retropie dsp2.data.rom, romm snes/dsp2.data.rom
DSP-2 data ROM

dsp3.program.rom optional in repo #

Size: 6.0 KB
Validation: size
Source: Core/NecDsp.cpp:98
Collection copy: bios/Nintendo/SNES/dsp3.program.rom
Platforms: lakka dsp3.program.rom, retroarch dsp3.program.rom, retrodeck bios/dsp3.program.rom, retropie dsp3.program.rom, romm snes/dsp3.program.rom
DSP-3 program ROM

dsp3.data.rom optional in repo #

Size: 2.0 KB
Validation: size
Source: Core/NecDsp.cpp:98
Collection copy: bios/Nintendo/SNES/dsp3.data.rom
Platforms: lakka dsp3.data.rom, retroarch dsp3.data.rom, retrodeck bios/dsp3.data.rom, retropie dsp3.data.rom, romm snes/dsp3.data.rom
DSP-3 data ROM

dsp4.program.rom optional in repo #

Size: 6.0 KB
Validation: size
Source: Core/NecDsp.cpp:99
Collection copy: bios/Nintendo/SNES/dsp4.program.rom
Platforms: lakka dsp4.program.rom, retroarch dsp4.program.rom, retrodeck bios/dsp4.program.rom, retropie dsp4.program.rom, romm snes/dsp4.program.rom
DSP-4 program ROM

dsp4.data.rom optional in repo #

Size: 2.0 KB
Validation: size
Source: Core/NecDsp.cpp:99
Collection copy: bios/Nintendo/SNES/dsp4.data.rom
Platforms: lakka dsp4.data.rom, retroarch dsp4.data.rom, retrodeck bios/dsp4.data.rom, retropie dsp4.data.rom, romm snes/dsp4.data.rom
DSP-4 data ROM

st010.program.rom optional in repo #

Size: 48.0 KB
Validation: size
Source: Core/NecDsp.cpp:100
Collection copy: bios/Nintendo/SNES/st010.program.rom
Platforms: lakka st010.program.rom, retroarch st010.program.rom, retrodeck bios/st010.program.rom, retropie st010.program.rom, romm snes/st010.program.rom
ST-010 program ROM

st010.data.rom optional in repo #

Size: 4.0 KB
Validation: size
Source: Core/NecDsp.cpp:100
Collection copy: bios/Nintendo/SNES/st010.data.rom
Platforms: lakka st010.data.rom, retroarch st010.data.rom, retrodeck bios/st010.data.rom, retropie st010.data.rom, romm snes/st010.data.rom
ST-010 data ROM

st011.program.rom optional in repo #

Size: 48.0 KB
Validation: size
Source: Core/NecDsp.cpp:101
Collection copy: bios/Nintendo/SNES/st011.program.rom
Platforms: lakka st011.program.rom, retroarch st011.program.rom, retrodeck bios/st011.program.rom, retropie st011.program.rom, romm snes/st011.program.rom
ST-011 program ROM

st011.data.rom optional in repo #

Size: 4.0 KB
Validation: size
Source: Core/NecDsp.cpp:101
Collection copy: bios/Nintendo/SNES/st011.data.rom
Platforms: lakka st011.data.rom, retroarch st011.data.rom, retrodeck bios/st011.data.rom, retropie st011.data.rom, romm snes/st011.data.rom
ST-011 data ROM

dmg_boot.bin optional in repo HLE fallback #

Size: 256 B
Aliases: gb_bios.bin
Validation: size
Source: Core/FirmwareHelper.h:148, Core/Gameboy.cpp:108-114, Core/GbBootRom.h:7
Collection copy: bios/Nintendo/Game Boy/dmg_boot.bin
Platforms: recalbox gb/dmg_boot.bin
Game Boy (DMG) boot ROM. Falls back to embedded SameBoy open-source boot ROM

cgb_boot.bin optional in repo HLE fallback #

Size: 2.2 KB
Aliases: gbc_bios.bin
Validation: size
Source: Core/FirmwareHelper.h:149, Core/Gameboy.cpp:108-119, Core/GbBootRom.h:83
Collection copy: bios/Nintendo/Game Boy Color/cgb_boot.bin
Platforms: recalbox gbc/cgb_boot.bin
Game Boy Color boot ROM. Falls back to embedded SameBoy open-source boot ROM

sgb_boot.bin optional in repo HLE fallback #

Size: 256 B
Aliases: sgb_bios.bin
Validation: size
Source: Core/FirmwareHelper.h:150, Core/Gameboy.cpp:108-127, Core/GbBootRom.h:32
Collection copy: bios/Nintendo/Super Game Boy/sgb_boot.bin
Platforms: recalbox sgb/sgb_boot.bin
Super Game Boy boot ROM for GB CPU. Falls back to embedded SameBoy open-source boot ROM

sgb2_boot.bin optional in repo HLE fallback #

Size: 256 B
Aliases: sgb_bios.bin
Validation: size
Source: Core/FirmwareHelper.h:151, Core/Gameboy.cpp:108-127, Core/GbBootRom.h:57
Collection copy: bios/Nintendo/Super Game Boy/sgb2_boot.bin
Platforms: recalbox sgb/sgb2_boot.bin
Super Game Boy 2 boot ROM for GB CPU. Falls back to embedded SameBoy open-source boot ROM

SGB1.sfc optional in repo #

Size: 256.0 KB
Validation: size
Source: Core/FirmwareHelper.h:118-133, Core/BaseCartridge.cpp:630-638
Collection copy: bios/Nintendo/Super Game Boy/SGB1.sfc/program.rom
Platforms: batocera SGB1.sfc, lakka SGB1.sfc, SGB1.sfc/program.rom, sgb1.program.rom, misterfpga SGB/Super Game Boy.sfc, recalbox sgb/SGB1.sfc, retroarch SGB1.sfc, SGB1.sfc/program.rom, sgb1.program.rom, retrobat SGB1.sfc, retrodeck bios/SGB1.sfc, bios/sgb1.program.rom, retropie SGB1.sfc, SGB1.sfc/program.rom, sgb1.program.rom, romm super-gb/SGB1.sfc, super-gb/sgb1.program.rom
Super Game Boy SNES cartridge ROM. Without it, SGB mode falls back to regular GB

SGB2.sfc optional in repo #

Size: 512.0 KB
Validation: size
Source: Core/FirmwareHelper.h:118-133, Core/BaseCartridge.cpp:630-638
Collection copy: bios/Nintendo/Super Game Boy/SGB2.sfc/program.rom
Platforms: batocera SGB2.sfc, bizhawk SNES_SGB2_(J).sfc, lakka SGB2.sfc, SGB2.sfc/program.rom, sgb2.program.rom, misterfpga SGB/Super Game Boy 2.sfc, recalbox sgb/SGB2.sfc, retroarch SGB2.sfc, SGB2.sfc/program.rom, sgb2.program.rom, retrobat SGB2.sfc, retrodeck bios/SGB2.sfc, bios/sgb2.boot.rom, retropie SGB2.sfc, SGB2.sfc/program.rom, sgb2.program.rom, romm super-gb/SGB2.sfc, super-gb/sgb2.program.rom
Super Game Boy 2 SNES cartridge ROM. Core option mesen-s_sgb2 selects SGB version

BS-X.bin optional in repo #

Size: 1.0 MB
Validation: size
Source: Core/FirmwareHelper.h:39-47, Core/FirmwareHelper.h:96-113, Core/BaseCartridge.cpp:65
Collection copy: bios/Nintendo/SNES/BS-X.bin
Platforms: batocera BS-X.bin, misterfpga SNES/bsx_bios.rom, recalbox satellaview/BS-X.bin
Satellaview BS-X BIOS ROM. Minimum accepted size is 32768 bytes

Generated on 2026-10-20T03:49:42Z