melonDS DS - RetroBIOS

Type	libretro
Classification	Community forks
Source	https://github.com/JesseTG/melonds-ds
Upstream	https://github.com/melonDS-emu/melonDS
Version	1.2.0
Profiled	2026-03-24
Cores	melonds_ds, melondsds
Systems	nintendo-ds, nintendo-dsi

Technical notes

Libretro-specific remake using melonDS as a statically-linked library. DS mode has FreeBIOS/generated firmware fallback; DSi mode requires all native files. Core searches "melonDS DS/" subfolder first, then system root. In DSi mode, NDS BIOS (bios7/bios9) are also required alongside DSi BIOS. Firmware and NAND filenames are user-selectable via core options.

7 files | 4 required, 3 optional | 7 in repo, 0 missing | 3 with HLE fallback

bios7.bin optional in repo HLE fallback
ARM7 BIOS

• System: nintendo-ds
• Size: 16.0 KB
• CRC32: 1280f0d5
• Validation: size
• Source: src/libretro/config/console.cpp:219, src/MemConstants.h:31, src/MemConstants.h:36
• Platforms: batocera, emudeck, lakka, recalbox, retroarch, retrobat, retrodeck, retropie, rocknix, romm

bios9.bin optional in repo HLE fallback
ARM9 BIOS

• System: nintendo-ds
• Size: 4.0 KB
• CRC32: 2ab23573
• Validation: size
• Source: src/libretro/config/console.cpp:306, src/MemConstants.h:30, src/MemConstants.h:37
• Platforms: batocera, emudeck, lakka, recalbox, retroarch, retrobat, retrodeck, retropie, rocknix, romm

firmware.bin optional in repo HLE fallback
NDS firmware image

• System: nintendo-ds
• Source: src/libretro/config/console.cpp:184
• Platforms: batocera, emudeck, lakka, recalbox, retroarch, retrobat, retrodeck, retropie, rocknix, romm
• Filename configurable via core options; generated firmware used as fallback

dsi_bios7.bin required in repo
DSi ARM7 BIOS

• System: nintendo-dsi
• Size: 64.0 KB
• CRC32: 4316cc42
• Validation: size
• Source: src/libretro/config/console.cpp:333, src/MemConstants.h:32, src/MemConstants.h:44
• Platforms: batocera, lakka, retroarch, retrobat, retropie, rocknix
• Contains eMMC key-Y at offset 0x8308 for NAND init

dsi_bios9.bin required in repo
DSi ARM9 BIOS

• System: nintendo-dsi
• Size: 64.0 KB
• CRC32: bae84f6c
• Validation: size
• Source: src/libretro/config/console.cpp:338, src/MemConstants.h:32, src/MemConstants.h:45
• Platforms: batocera, lakka, retroarch, retrobat, retropie, rocknix

dsi_firmware.bin required in repo
DSi firmware image

• System: nintendo-dsi
• Source: src/libretro/config/console.cpp:352-358
• Platforms: batocera, lakka, retroarch, retrobat, retropie, rocknix
• Filename configurable via core options; must have DSi firmware header

dsi_nand.bin required in repo
DSi NAND dump

• System: nintendo-dsi
• Source: src/libretro/config/console.cpp:378, src/libretro/config/console.cpp:1172-1179
• Platforms: batocera, lakka, retroarch, retropie, rocknix
• Filename configurable via core options; 240MB or 245.5MB with optional no$cash footer

Generated on 2026-09-14T09:03:10Z