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libretro/emulators/mesen-s.yml
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Abdessamad Derraz e7aa9e870b fix: state libretro core versions from their code 
Each libretro profile records version_basis and core_version is read
there at its pin. snes9x states 1.63 in snes9x.h, nestopia 2.0.0, mgba
0.11.0, vice 3.10, atari800's libretro tree 7.0.0. Cores whose build
takes its version from git carry the nearest tag in describe form
(flycast v2.7-90-ge88b0ce, ppsspp, duckstation, gearcoleco), placeholders
copied from .info files (Git, SVN) are replaced by the code's statement,
and a code that states none is null with kind none.
2026-10-27 19:21:27 +01:00

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# mesen-s - SNES / Game Boy / Game Boy Color emulator
# Profiled from: libretro/Mesen-S (libretro port) + SourMesen/Mesen-S (upstream)
emulator: "Mesen-S"
display_name: "Mesen-S"
type: libretro
core_classification: official_port
source: "https://github.com/libretro/Mesen-S"
upstream: "https://github.com/SourMesen/Mesen-S"
profiled_date: "2026-03-24"
source_commit: "9e4fdeb9b336470bc96beb8765b2e79c86a2da1e"
upstream_commit: "89199f298a95345a893d814525b6668567a6d490"
core_version: "0.4.0"
version_basis:
kind: file
path: "Core/EmuSettings.cpp"
pattern: 'uint16_t major = (\d+);\s*\n\s*uint8_t minor = (\d+);\s*\n\s*uint8_t revision = (\d+);'
format: "{1}.{2}.{3}"
cores: [mesen-s, mesen_s]
systems: [nintendo-snes, nintendo-gb, nintendo-gbc, nintendo-super-game-boy, nintendo-satellaview]
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 Upstream archived at 0.4.0, superseded by Mesen2.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.
files:
# -- NEC uPD7725 DSP firmware (split format) --
# Combined format also accepted: dsp1.rom (8192), dsp1b.rom (8192),
# dsp2.rom (8192), dsp3.rom (8192), dsp4.rom (8192)
- name: "dsp1.program.rom"
size: 6144
required: false
hle_fallback: true
validation: [size]
note: "DSP-1 program ROM. HLE fallback in libretro port only"
source_ref: "upstream Core/NecDsp.cpp:95, source Core/FirmwareHelper.h:17-35"
- name: "dsp1.data.rom"
size: 2048
required: false
hle_fallback: true
validation: [size]
note: "DSP-1 data ROM"
source_ref: "upstream Core/NecDsp.cpp:95, source Core/FirmwareHelper.h:17-35"
- name: "dsp1b.program.rom"
size: 6144
required: false
hle_fallback: true
validation: [size]
note: "DSP-1B program ROM. HLE fallback in libretro port only"
source_ref: "upstream Core/NecDsp.cpp:96"
- name: "dsp1b.data.rom"
size: 2048
required: false
hle_fallback: true
validation: [size]
note: "DSP-1B data ROM"
source_ref: "upstream Core/NecDsp.cpp:96"
- name: "dsp2.program.rom"
size: 6144
required: false
validation: [size]
note: "DSP-2 program ROM"
source_ref: "upstream Core/NecDsp.cpp:97"
- name: "dsp2.data.rom"
size: 2048
required: false
validation: [size]
note: "DSP-2 data ROM"
source_ref: "upstream Core/NecDsp.cpp:97"
- name: "dsp3.program.rom"
size: 6144
required: false
validation: [size]
note: "DSP-3 program ROM"
source_ref: "upstream Core/NecDsp.cpp:98"
- name: "dsp3.data.rom"
size: 2048
required: false
validation: [size]
note: "DSP-3 data ROM"
source_ref: "upstream Core/NecDsp.cpp:98"
- name: "dsp4.program.rom"
size: 6144
required: false
validation: [size]
note: "DSP-4 program ROM"
source_ref: "upstream Core/NecDsp.cpp:99"
- name: "dsp4.data.rom"
size: 2048
required: false
validation: [size]
note: "DSP-4 data ROM"
source_ref: "upstream Core/NecDsp.cpp:99"
# -- NEC uPD96050 coprocessor firmware (split format) --
# Combined format also accepted: st010.rom (53248), st011.rom (53248)
- name: "st010.program.rom"
size: 49152
required: false
validation: [size]
note: "ST-010 program ROM"
source_ref: "upstream Core/NecDsp.cpp:100"
- name: "st010.data.rom"
size: 4096
required: false
validation: [size]
note: "ST-010 data ROM"
source_ref: "upstream Core/NecDsp.cpp:100"
- name: "st011.program.rom"
size: 49152
required: false
validation: [size]
note: "ST-011 program ROM"
source_ref: "upstream Core/NecDsp.cpp:101"
- name: "st011.data.rom"
size: 4096
required: false
validation: [size]
note: "ST-011 data ROM"
source_ref: "upstream Core/NecDsp.cpp:101"
# -- Game Boy boot ROMs --
- name: "dmg_boot.bin"
size: 256
required: false
hle_fallback: true
aliases: [gb_bios.bin]
validation: [size]
note: "Game Boy (DMG) boot ROM. Falls back to embedded SameBoy open-source boot ROM"
source_ref: "source Core/FirmwareHelper.h:148, source Core/Gameboy.cpp:108-114, source Core/GbBootRom.h:7"
- name: "cgb_boot.bin"
size: 2304
required: false
hle_fallback: true
aliases: [gbc_bios.bin]
validation: [size]
note: "Game Boy Color boot ROM. Falls back to embedded SameBoy open-source boot ROM"
source_ref: "source Core/FirmwareHelper.h:149, source Core/Gameboy.cpp:108-119, source Core/GbBootRom.h:83"
- name: "sgb_boot.bin"
size: 256
required: false
hle_fallback: true
aliases: [sgb_bios.bin]
validation: [size]
note: "Super Game Boy boot ROM for GB CPU. Falls back to embedded SameBoy open-source boot ROM"
source_ref: "source Core/FirmwareHelper.h:150, source Core/Gameboy.cpp:108-127, source Core/GbBootRom.h:32"
- name: "sgb2_boot.bin"
size: 256
required: false
hle_fallback: true
aliases: [sgb_bios.bin]
validation: [size]
note: "Super Game Boy 2 boot ROM for GB CPU. Falls back to embedded SameBoy open-source boot ROM"
source_ref: "source Core/FirmwareHelper.h:151, source Core/Gameboy.cpp:108-127, source Core/GbBootRom.h:57"
# -- Super Game Boy cartridge ROMs --
- name: "SGB1.sfc"
size: 262144
required: false
validation: [size]
note: "Super Game Boy SNES cartridge ROM. Without it, SGB mode falls back to regular GB"
source_ref: "upstream Core/FirmwareHelper.h:118-133, source Core/BaseCartridge.cpp:630-638"
- name: "SGB2.sfc"
size: 524288
required: false
validation: [size]
note: "Super Game Boy 2 SNES cartridge ROM. Core option mesen-s_sgb2 selects SGB version"
source_ref: "upstream Core/FirmwareHelper.h:118-133, source Core/BaseCartridge.cpp:630-638"
# -- Satellaview --
- name: "BS-X.bin"
size: 1048576
required: false
validation: [size]
note: "Satellaview BS-X BIOS ROM. Minimum accepted size is 32768 bytes"
source_ref: "source Core/FirmwareHelper.h:39-47, 96-113, source Core/BaseCartridge.cpp:65"
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