skyemu - RetroBIOS¶


Type	standalone + libretro
Classification	Official ports
Source	https://github.com/skylersaleh/SkyEmu/blob/v5/src/libretro.c
Upstream	https://github.com/skylersaleh/SkyEmu
Version	v5
Profiled	2026-03-25
Cores	skyemu
Systems	nintendo-gb, nintendo-gbc, nintendo-gba, nintendo-ds

Technical notes

Multi-system emulator by skylersaleh. Libretro core built from the upstream repo. All BIOS optional; bundles Cult-of-GBA BIOS (GBA), DraStic free BIOS (NDS ARM7/ARM9), stub firmware (NDS), and HLE boot skip (GB/GBC). BIOS loading controlled by core options (default: on). Files loaded from system_dir/SkyEmu/ subdirectory. Standalone validates exact BIOS file size; libretro only rejects files exceeding buffer. .info missing gb_bios.bin (gb.h:1603).

6 files | 0 required, 6 optional | 6 in repo, 0 missing | 6 with HLE fallback

cgb_boot.bin optional in repo HLE fallback
GBC boot ROM

Path: SkyEmu/cgb_boot.bin
Aliases: gbc_bios.bin, cgb0_boot.bin, cgb_agb_boot.bin
Source: src/gb.h:1593-1596, src/gb.h:1605-1608
Platforms: lakka, recalbox, retroarch, retropie, romm

dmg_rom.bin optional in repo HLE fallback
DMG boot ROM

Path: SkyEmu/dmg_rom.bin
Aliases: dmg0_rom.bin, gb_bios.bin
Source: src/gb.h:1601-1603
Platforms: lakka, retroarch, retropie

gba_bios.bin optional in repo HLE fallback
GBA BIOS

Path: SkyEmu/gba_bios.bin
Source: src/gba.h:1726-1730
Platforms: batocera, lakka, recalbox, retroarch, retrobat, retrodeck, retropie, rocknix, romm

nds7.bin optional in repo HLE fallback
NDS ARM7 BIOS

Path: SkyEmu/nds7.bin
Source: src/nds.h:3088-3089
Platforms: lakka, retroarch, retropie

nds9.bin optional in repo HLE fallback
NDS ARM9 BIOS

Path: SkyEmu/nds9.bin
Source: src/nds.h:3091-3092
Platforms: lakka, retroarch, retropie

firmware.bin optional in repo HLE fallback
NDS firmware

Path: SkyEmu/firmware.bin
Source: src/nds.h:3094, src/nds.h:3200-3268
Platforms: batocera, emudeck, lakka, recalbox, retroarch, retrobat, retrodeck, retropie, rocknix, romm

Generated on 2026-08-23T16:12:06Z