Emulators

Arcade Systems  •  Consoles and PC Systems  •  Handheld Systems  •  Add-ons and Peripherals  •  Miscellaneous  •  Rom Folders - Quick Reference

This page describes the supported emulators and rom formats for each system.

Important Information

Verified systems are marked with ✔

These are found in the "Verified" section of Package Manager, and will be installed in the Games tab.

Experimental systems are marked with ⚠

These are found in the "Expert" section of Package Manager and will be installed in the Expert tab (hidden by default). The Expert tab can be accessed by installing the Expert shortcut or by enabling it via Apps › Tweaks › User interface › Show expert mode. Note: These may require additional learning, files and configuration by the user to get working. Some may have performance or compatibility issues, please research and refer to the libretro core documentation.

Bios files

• Bios files are essential for some systems, should be named exactly as stated below and placed in the root /BIOS folder, unless otherwise indicated in a specific systems notes further below. Bios file names and extensions are case sensitive!

Rom files

• The roms on the included Miyoo Mini SD card are a mixed bag which can lead to incompatibility with some emulators. It is highly recommended to source your own roms to get the most out of the device.
• Rom folder names are case sensitive and differ in Onion vs the stock Miyoo SD card, copy your roms from system to system if coming from stock (copying the ‘Roms’ folder wholesale from the Miyoo SD card will not work).
• Subfolders can be used inside your rom folders but ONLY one level deep (i.e. Roms/GB/Hacks).
• Subfolders cannot have an apostrophe (') in the name and browsing subfolders is not compatible with miyoogamelist.xml (all games will appear as one flat list).
• If you add new roms to a system, highlight the system in the Games tab and press SELECT › Refresh all roms.
• To add a game to your Favorites list, highlight the game in the game list and press SELECT › Add to favorites.

The details provided below are for guidance and not every emulator included in Onion has been documented.

Arcade Systems

Arcade emulation is a little more complex than your typical console emulation and includes MAME (Multiple Arcade Machine Emulator) along with CPS1/2/3 (Capcom Play System), SNK Neo Geo (released both as an Arcade cabinet and Home Console), FB (Final Burn) and Daphne.

While MAME supports many classic arcade games, for best compatibility and performance, it is recommended to use the CPS and Neo Geo systems (which use dedicated & customised emulators) for those particular games and MAME (or FB) for everything else.

Both MAME and FB require your romsets to be matched exactly to the emulator version so you will need to source the recommended romsets. MAME romsets are not compatible with FB cores (and vice versa) and not every game in a full romset will be playable but the majority will be.

Arcade roms in general do not play well with save states (some will work but the majority don’t), you can disable auto-loading of save states in the Retroarch menu (and save content or core overrides).

MAME and FB both rely on internal databases to translate the rom file name into the displayed game name, some games may be missing from the db. You should never rename these roms, instead you can use the miyoogamelist functionality to give your arcade roms appropriate names.

For more detailed information and tips on Arcade emulation, checkout the awesome Ultimate Miyoo Mini Arcade Guide for Onion by lordelan.

Arcade (Default) ✔

Alternative emulators available in Expert Emulator: lr-mame2003plus Required rom set version: MAME 2003-Plus Reference: Full Non-Merged Romsets Rom Folder: ARCADE Extensions: .zip Bios: pgm.zip (for PGM games only like Knights of Valour and DoDonPachi) Samples: Audio Samples for Mame2003Plus should be placed in the /BIOS/mame2003-plus/samples folder Notes MAME does not play well with save states this is a core issue and cannot be fixed. It is recommended to disable 'auto-loading of save states' in the Retroarch menu (and save core overrides). An onscreen message saying ‘This Game Will Not Work’ is MAME letting you know that the game is not emulated in the MAME version and you will not find a compatible/playable rom for that game. Current/modern versions of MAME are not compatible with the Miyoo Minis limited hardware specification which is why MAME 2003Plus has been chosen as the default. Check out the MAME overview video by RetroBreeze.

Arcade (Alternatives) ⚠

Emulator: lr-fbalpha2012, lr-fbneo, lr-mame2000, lr-mame2003-extreme Rom Folder: FBA2012, FBNEO, MAME2000, ARCADE (mame2003-extreme) FBA2012 Required ROM Version: "FBA Arcade Set v0.2.97.29 for FBA 2012 libretro core" (use quotes when searching, to find an exact match) FBNEO Required ROM Version: FinalBurn Neo is compatible with FinalBurn Neo latest ROM sets. Extensions: .zip .7z Notes The FB cores are a good alternative to MAME, they may not run as many games but you may find some games are more accurate in FB. FBNEO is the latest FB core and as such it has higher hardware expectations (beyond the mini for some games). While many games will run fine in FBNEO, you may see better performance (at the cost of accuracy) in FBA2012 which performs better on lower powered devices. For best game compatibility, seek out the recommended romsets above. Alternative romsets for Final Burn cores may be largely compatible (i.e. v0.2.97.24, v0.2.97.39, v0.2.97.40, v0.2.97.44).

Capcom - CP System ✔

Alias: CPS-1 Emulator: fbalpha2012_cps1_libretro Required ROM Version: "FBA Arcade Set v0.2.97.29 for FBA 2012 libretro core" (use quotes when searching, to find an exact match) Rom Folder: CPS1 Extensions: .zip .7z .bin/.cue Bios: None For best game compatibility, seek out the recommended romset above. Alternative romsets for Final Burn cores may be largely compatible (i.e. v0.2.97.24, v0.2.97.39, v0.2.97.40, v0.2.97.44).

Capcom - CP System II ✔

Alias: CPS-2 Emulator: fbalpha2012_cps2_libretro Required ROM Version: "FBA Arcade Set v0.2.97.29 for FBA 2012 libretro core" (use quotes when searching, to find an exact match) Rom Folder: CPS2 Extensions: .zip .7z .bin/.cue Bios: None For best game compatibility, seek out the recommended romset above. Alternative romsets for Final Burn cores may be largely compatible (i.e. v0.2.97.24, v0.2.97.39, v0.2.97.40, v0.2.97.44).

Capcom - CP System III ✔

Alias: CPS-3 Emulator: fbalpha2012_cps3_libretro Required ROM Version: "FBA Arcade Set v0.2.97.29 for FBA 2012 libretro core" (use quotes when searching, to find an exact match) Rom Folder: CPS3 Extensions: .zip .7z .bin/.cue Bios: None For best game compatibility, seek out the recommended romset above. Alternative romsets for Final Burn cores may be largely compatible (i.e. v0.2.97.24, v0.2.97.39, v0.2.97.40, v0.2.97.44).

Daphne ⚠

Emulator: daphne_libretro.so Rom Folder: DAPHNE Notes Check out the Daphne overview video by RetroBreeze. For more information please visit https://github.com/libretro/daphne.

Consoles and PC Systems

Amstrad CPC ✔

Emulator: lr-crocods Rom Folder: CPC Extensions: .sna .dsk .kcr Bios: None

Atari 800 ⚠

Emulator: lr-atari800 Rom Folder: EIGHTHUNDRED Extensions: .atr .zip .7z Bios: ATARIOSA.ROM and ATARIOSB.ROM and ATARIBAS.ROM

Atari 2600 ✔

Alias: Atari Video Computer System (Atari VCS) Emulator: lr-stella2014 Rom Folder: ATARI Extensions: .a26 .bin .zip .7z Bios: None

Atari 5200 ✔

Alias: Atari 5200 SuperSystem Emulator: lr-atari800 Rom Folder: FIFTYTWOHUNDRED Extensions: .a52 .zip .7z .bin Bios: 5200.rom and ATARIBAS.ROM

Atari 7800 ✔

Alias: Atari 7800 ProSystem Emulator: lr-prosystem Rom Folder: SEVENTYEIGHTHUNDRED Extensions: .a78 .zip Bios: 7800 BIOS (U).rom Notes Roms must contain headers or they will not function. For an explanation of headers and why they are important, see this comment

Atari Jaguar ⚠

Emulator: Virtual Jaguar Rom Folder: JAGUAR Extensions: .j64 .jag .rom .abs .cof .bin .prg (must be lowercase) Bios: virtualjaguar_bios Note: Slow to emulate

Atari ST/STE/TT/Falcon ⚠

Emulator: hatari Rom Folder: ATARIST Extensions: .st .msa .zip .stx .dim .ipf (must be lowercase) Bios: tos.img The plain ST mode only works with TOS 1.00, 1.02, 1.04, or 2.06. STE mode requires any of the TOS versions 1.xx or 2.xx. TOS 3.0x is for TT, and TOS 4.0x is for Falcon. For more information please review the official core documentation

Coleco - ColecoVision ✔

Alias: CBS ColecoVision Emulator: lr-bluemsx Rom Folder: COLECO Extensions: .rom .ri .mx1 .mx2 .col .dsk .cas .sg .sc .m3u .zip .7z Bios: coleco.rom (Verified working MD5: 2C66F5911E5B42B8EBE113403548EEE7) Notes The blueMSX core requires the Databases and Machines folders from a full installation of blueMSX (more info here) to be placed inside the BIOS folder. Check out the ColecoVision overview video by RetroBreeze.

Commodore 64/VIC-20/PET ✔

Emulator: lr-vice_x64 Rom Folder: COMMODORE Extensons: .d64 .zip .7z .t64 .crt .prg .nib .tap Bios: None

Commodore - Amiga & Amiga CD32 ✔

Alias: Amiga CD32 Emulator: lr-puae, lr-uae4arm Rom Folder: AMIGA Extensions: .adf .hdf .lha .zip (For CD32: .bin/.cue .iso) Bios: kick33180.A500, kick34005.A500, kick34005.CDTV, kick37175.A500, kick37350.A600, kick39106.A1200, kick39106.A4000, kick40060.CD32, kick40060.CD32.ext, kick40063.A600, kick40068.A1200, and kick40068.A4000 Notes For maximum compatibility add ALL above ‘kickstart roms’ to the /BIOS folder and ensure they are named exactly as detailed (lowercase). See this link for more information. SELECT toggles the onscreen keyboard, L & R are mapped to the mouse buttons. This emulator will play Amiga CD32 games though some perform better than others. Setting CPU speed to -700 (negative 700) in the Retroarch menu may improve A1200/CD32 performance. Other Core Settings that might be useful for some games are frameskip set to 1, or setting off the blitter wait in Video options. Some games will have stuttering audio or behave very slowly regardless of the CPU speed, frameskip etc. Many of these games will work fine if you find another format for them. .hdf (hard disk files) are the most problematic. .adf or .lha games usually work better although you might have to open RA options to switch or add floppy disks when required. If you find a game that won't run correctly no matter the options you set for it, simply try to find another version in another format.

Commodore - Amiga CD32 (uae4arm) ⚠

Emulator: lr-uae4arm Rom Folder: AMIGACD Extensions: .bin/.cue .ccd .lha .nrg .mds .iso .m3u .chd Bios: kick33180.A500 and kick34005.A500 and kick40068.A1200 See this link for more details.

Fairchild Channel F ✔

Alias: Fairchild Video Entertainment System Emulator: lr-freechaf Rom Folder: FAIRCHILD Extensions: .bin .rom .chf .zip Bios: sl31253.bin and sl31254.bin and sl90025.bin

General Consumer Electronics - Vectrex ✔

Emulator: lr-vecx Rom Folder: VECTREX Extensions: .vec .zip .7z Bios: None

Magnavox Odyssey 2 ✔

Alias: Philips Odyssey 2, Philips Videopac G7000, Philips Odyssey, Odyssey2 Emulator: lr-o2em Rom Folder: ODYSSEY Extensions: .bin .zip .7z Bios: o2rom.bin

Mattel - Intellivision ✔

Emulator: lr-freeintv Rom Folder: INTELLIVISION Extensions: .bin .int .zip .7z Bios: exec.bin, grom.bin

Microsoft - MS-DOS ✔

Alias: Microsoft DOS Emulator: lr-dosbox_pure Rom Folder: DOS Extensions: .zip .dosz .exe .com .bat .iso .bin/.cue .ins .img .ima .vhd .jrc .tc .m3u .m3u8 .conf Bios: None

NEC - PC Engine SuperGrafx ✔

Alias: SuperGrafx Emulator: lr-mednafen-supergrafx Rom Folder: SGFX Extensions: .pce .sgx .bin/.cue .ccd .chd .zip .7z Bios: syscard3.pce

NEC - PC-8000 & PC-8800 series ⚠

Emulator: quasi88 Rom Folder: PCEIGHTYEIGHT Extensions: .d88 .fdi .hdi .zip Bios: None

NEC - PC-98 ⚠

Emulator: lr-nekop2 Rom Folder: PCNINETYEIGHT Extensions: .d98 .fdi .hdi .zip (see link below for complete list of supported extensions) Bios: See the following link for details regarding the required bios files (and core configuration). https://docs.libretro.com/library/neko_project_ii_kai/#bios IMPORTANT: Contrary to the link, the Bios files must be placed in BIOS/np2 NOT in BIOS/np2kai

NEC - PC-FX ⚠

Emulator: lr-mednafen-pcfx Rom Folder: PCFX Extensions: .chd .zip .bin/.cue .ccd .toc Bios: pcfx.rom

NEC - TurboGrafx-16 ✔

Alias: PC Engine Emulator: lr-mednafen-pce-fast Rom Folder: PCE Extensions: .pce .chd .zip .7z .ccd .iso .img .bin/.cue Bios: None

Nintendo Entertainment System (NES) ✔

Alias: Famicom Emulator: lr-fceumm, lr-nestopia, lr-quicknes Rom Folder: FC Extensions: .nes .zip .7z Bios: None Notes Roms must contain headers or they will not function. For an explanation of headers and why they are important, see this comment

Nintendo - Super Nintendo Entertainment System (SNES) ✔

Alias: Super Nintendo, Super Famicom (SFC) Emulator: lr-mednafen-supafaust, snes9x_libretro.so, lr-snes9x2005PLUS lr-snes9x2010, lr-snes9x2002, lr-snes9x2005, lr-snes9x2010 Rom Folder: SFC Extensions: .sfc .smc .zip .7z Bios: None

Nintendo - Virtual Boy ✔

Emulator: lr-mednafen-vb Rom Folder: VB Extensions: .vb .vboy .zip .7z Bios: None

Panasonic - 3DO Interactive Multiplayer ⚠

Alias: 3DO System, 3DO Emulator: lr-opera Rom Folder: PANASONIC Extensions: .iso .chd .bin/.cue Bios: panafz1.bin or panafz10.bin or panafz10-norsa.bin or panafz10e-anvil.bin or panafz10e-anvil-norsa.bin or panafz1j.bin or panafz1j-norsa.bin or goldstar.bin or sanyotry.bin or 3do_arcade_saot.bin See this link for more details. Notes This will never run full speed!

Philips Videopac+ G7400 ✔

Emulator: lr-o2em Rom Folder: VIDEOPAC Extensions: .bin .zip .7z Bios: o2rom.bin, g7400.bin (maybe, c52.bin and jopac.bin) Notes Games made for 7000 and 7200 machines require bios files.

Sega Genesis ✔

Alias: Mega Drive Emulator: lr-picodrive, lr-genesis_plus_gx Rom Folder: MD Extensions: .68k .mdx .md .sgd .smd .gen .bin .zip .7z Bios: bios_MD.bin (optional)

Sega - Master System ✔

Emulator: lr-picodrive, lr-genesis_plus_gx, lr-gearsystem Rom Folder: MS Extensions: .7z .bin .sms .zip (must be lowercase) Bios: bios_E.sms (optional), bios_U.sms (optional), bios_J.sms (optional)

Sega - SG 1000 ✔

Emulator: Gearsystem Rom Folder: SEGASGONE Extensions: .sms .gg .sg .mv .bin .rom (must be lowercase) Bios: None

Sharp X1 ⚠

Emulator: lr-x1 Rom Folder: XONE Extensions: .dx1 .zip .2d .2hd .tfd .d88 .88d .hdm .xdf .dup .cmd Bios: IPLROM.X1, IPLROM.X1T (need to be placed in a folder named xmil within the BIOS folder)

Sharp X68000 ⚠

Emulator: lr-px68k Rom Folder: X68000 Extensions: .dim .m3u Bios: iplrom.dat, cgrom.dat, iplrom30.dat (optional), iplromco.dat (optional), iplromxv.dat (optional) (need to be placed in a folder named keropi within the BIOS folder)

Sinclair - ZX Spectrum ✔

Emulator: lr-fuse Rom Folder: ZXS Extensions: .sna .szx .z80 .tap .tzx .gz .udi .mgt .img .trd .scl .dsk Bios: None

Sinclair - ZX-81 ⚠

Emulator: lr-81 Rom Folder: ZXEIGHTYONE Extensions: .p .tzx .zip Bios: None Notes I was only able to successfully load .p based roms. I suggest using .p roms and .zip files with .p roms in them based on my testing. Many games can be started by pressing SELECT to bring up the virtual keyboard, press R then RETURN. Otherwise, you'll need to search online on how to load these games if you're not familiar with this system.

SNK - Neo Geo ✔

Emulator: lr_fbalpha2012_neogeo Required ROM Version: "FBA Arcade Set v0.2.97.29 for FBA 2012 libretro" (search with quotes for exact match) Alternative ROM Pack: "Neo-Geo Rom Collection By Ghostware" (search with quotes for exact match) Rom Folder: NEOGEO Extensions: .zip (must be lowercase) Bios: neogeo.zip Notes UniBIOS can be used but v4.0 can lead to missing or corrupted audio when used with save states. Earlier UniBIOS version are OK. Because Neo Geo roms can come in different formats (split or non-merged), it's recommended to keep the 'neogeo.zip' bios in both the /BIOS folder and the /Roms/NEOGEO folder to ensure best compatibility. For best game compatibility, seek out the recommended romset above. Alternative romsets for Final Burn cores may be largely compatible (i.e. v0.2.97.24, v0.2.97.39, v0.2.97.40, v0.2.97.44). Check out the NeoGeo overview video by RetroBreeze.

SNK - Neo Geo CD ✔

Emulator: lr-neocd Rom Folder: NEOCD Extensions: .bin/.cue .chd .m3u Bios: (000-lo.lo or ng-lo.rom) and (neocd_f.rom or neocd.bin or uni-bioscd.rom) placed in a folder named neocd within the bios folder Notes UniBIOS can be used but v4.0 can lead to missing or corrupted audio when used with save states. Earlier UniBIOS version are OK. Because Neo Geo roms can come in different formats (split or non-merged), it's recommended to keep the 'neogeo.zip' bios in both the /BIOS folder and the /Roms/NEOGEO folder to ensure best compatibility.

Sony - PlayStation ✔

Alias: PS, PS1, PSX Emulator: lr-pcsx-rearmed Rom Folder: PS Extensions: .chd .pbp .bin/.cue .img .mdf .toc .cbn .m3u .ccd (must be lowercase) Bios: PSXONPSP660.bin, scph101.bin, scph7001.bin, scph5501.bin, scph1001.bin Recommended Romset: "files for CHD-PSX-USA" Important: Roms in .bin format must have accompanying .cue files or they will not be displayed. Onion can generate .cue files automatically (Apps > Tweaks > Tools > Generate Cue Files for PSX Games). Alternatively, you can create .cue files using a free online tool such as cue-maker. All Bios files are 512kb in size and are case sensitive, they must be named exactly as shown above. Using the PSXONPSP660.bin bios is recommended for best compatibility. If you experience issues loading games, you can use md5 checker to verify your bios files against the md5sum provided in the official core documentation. Notes Rewind and Fast Forward capability should be disabled while playing PSX as performance may suffer greatly. PAL/EUR games run at 50fps, NTSC/USA/JP games run at 60fps. This is by design and as per original hardware. Some titles (e.g. Looney Tunes Sheep Rider, Jedi Power Battles, and 2xtreme/espn extreme games) need to have SMC Checks disabled or games will eventually slow down and crash. Go to RetroArch Quick Menu (MENU+SELECT while in-game), select Options and toggle on (Speed Hack) Disable SMC Checks. Check out the PlayStation overview video by RetroBreeze.

Uzebox ⚠

Emulator: lr-uzem Rom Folder: UZEBOX Extensions: .uze Bios: None

Handheld Systems

Atari Lynx ✔

Emulator: lr-handy, lr-mednafen_lynx Rom Folder: LYNX Extensions: .lnx .zip Bios: lynxboot.img Notes Roms must contain headers or they will not function. For an explanation of headers and why they are important, see this comment

Bandai - WonderSwan / Color ✔

Emulator: lr-mednafen-wswan Rom Folder: WS Extensions: .ws .pc2 .zip .7z Bios: None

Nintendo - Game & Watch ✔

Emulator: lr-gw Rom Folder: GW Extensions: .mgw .zip .7z Bios: None

Nintendo - Game Boy ✔

Emulator: lr-gambatte, lr-gearboy, lr-tgbdual Rom Folder: GB Extensions: .gb .gbc .dmg .zip .7z Bios: gb_bios.bin (optional)

Nintendo - Game Boy Advance ✔

Emulator: lr-gpsp, lr-mgba, lr-meteor, lr-mednafen-gba, lr-vba_next Rom Folder: GBA Extensions: .bin .gba .zip .7z Bios: gba_bios.bin (required for lr-gpsp, optional for other cores), gb_bios.bin (optional), gbc_bios.bin (optional), sgb_bios.bin (optional)

Nintendo - Game Boy Color ✔

Emulator: lr-gambatte, lr-gearboy, lr-tgbdual Rom Folder: GBC Extensions: .gb .gbc .dmg .zip .7z Bios: gbc_bios.bin (optional)

Nintendo - Pokemon Mini ✔

Emulator: lr-pokemini Rom Folder: POKE Extensions: .min .zip Bios: bios.min (optional)

Sega - Game Gear ✔

Emulator: lr-picodrive, lr-genesis_plus_gx, lr-gearsystem Rom Folder: GG Extensions: .bin .gg .zip .7z Bios: bios.gg (optional)

SNK - Neo Geo Pocket / Color ✔

Emulator: lr-mednafen-ngp Rom Folder: NGP Extensions: .ngp .ngc .zip .7z Bios: None

Welback Holdings - Mega Duck WG-108 ✔

Alias: Cougar Boy Emulator: lr-sameduck Rom Folder: MEGADUCK Extensions: .bin .zip .7z Bios: None

Watara Supervision ✔

Alias: QuickShot Supervision Emulator: lr-potator Rom Folder: SUPERVISION Extensions: .sv .bin .zip .7z Bios: None

Add-ons and Peripherals

Bandai - SuFami Turbo ✔

Emulator: lr-snes9x Rom Folder: SUFAMI Extensions: .smc .zip .7z Bios: STBIOS.bin Notes For multi-cart Sufami Turbo games, you must first run each game individually to create sram files for them. Then the multi-link will function correctly. See Libretro’s documentation for more info.

Dreamcast - VMU ⚠

Alias: Visual Memory Unit, Visual Memory System (VMS) Emulator: lr-vemulator Rom Folder: VMU Extensions: .vms .bin Bios: None Notes (Credit: dwmccoy) A pixelated screen displays on launch. Open Retroarch (MENU+SELECT) and choose Close Content. Now select History and load the game file you just closed. Choose Run. The game should now display correctly but plays too fast. To fix this go back into Retroarch and set Automatic Frame Delay to ON in the Latency Menu.

NEC - TurboGrafx CD ✔

Alias: PC Engine CD Emulator: lr-mednafen-pce-fast Rom Folder: PCECD Extensions: .pce .chd .ccd .iso .img .bin/.cue Bios: syscard3.pce Notes: This core does not support compressed files (.zip or .7z), if you find your games are stuck at a JUST A MOMENT... loading screen, ensure that you roms (and bios files) are not zipped. For more information relating to this core please review the official core documentation.

Nintendo - Family Computer Disk System ✔

Alias: Famicom Disk System Emulator: lr-fceumm Rom Folder: FDS Extensions: .nes .unif .unf .fds .zip .7z Bios: disksys.rom Notes Roms must contain headers or they will not function. For an explanation of headers and why they are important, see this comment

Nintendo - Satellaview ✔

Emulator: lr-snes9x Rom Folder: SATELLAVIEW Extensions: .bs .sfc .smc .zip .7z Bios: BS-X.bin

Nintendo - Super Game Boy ✔

Emulator: lr-mgba Rom Folder: SGB Extensions: .gb .gbc .dmg .zip .7z Bios: sgb_bios.bin

Sega - 32X ✔

Alias: Super 32X, Genesis 32X, Mega 32X, Mega Drive 32X Emulator: lr-picodrive Rom Folder: THIRTYTWOX Extensions: .32x .7z .bin .md .smd .zip Bios: None

Sega CD ✔

Alias: Mega-CD Emulator: lr-picodrive, lr-genesis_plus_gx Rom Folder: SEGACD Extensions: .chd .bin/.cue .iso Bios: bios_CD_U.bin, bios_CD_E.bin, bios_CD_J.bin Notes You can find a video tutorial by RetroBreeze here Review the official core documentation for more information about this emulator.

Miscellaneous

ASCII Corporation / Microsoft - MSX ✔

Alias: MSX2 Emulator: lr-bluemsx, lr-fmsx Rom Folder: MSX Extensions: .cas .dsk .mx1 .mx2 .rom .zip .7z Notes The blueMSX core requires the Databases and Machines folders from a full installation of blueMSX (more info here) to be placed inside the BIOS folder.

EasyRPG ⚠

Emulator: lr-easyrpg Rom Folder: EASYRPG Extensions: .easyrpg Bios: None Notes Games must have a RPG_RT.ini and RPG_RT.ldb inside their respective folders.

OpenBOR ⚠

Emulator: OpenBOR Standalone Rom Folder: OPENBOR Extensions: .pak Bios: None Notes: Larger game paks (i.e. Marvel Infinity) may take 2-3 minutes to load, and up to a minute to close, be patient. Save states are not currently supported but in game saving and loading works well.

Pico-8 ✔

Emulator: fake-08 Rom Folder: PICO Extensions: .p8 .png Bios: None Notes Many games will play fine, compatibility is not perfect but is improving. This emulator does not currently support in-game saves or save states. For multi-cart games (such as POOM), place all 'cart' game files in Roms/PICO (you may use subfolders, i.e. Roms/PICO/POOM) and launch the game from the first file (i.e. poom_0.p8). To download games from the Lexaloffle BBS, right-click the button in the bottom left corner of the play window and choose ‘save link as’. Check out the Pico-8 overview video by RetroBreeze.

ScummVM ✔

Emulator: lr-scummvm Rom Folder: SCUMMVM Extensions: .scummvm Notes For each ScummVM game folder you need to create a scummvm file with the same name (just add the .scummvm extension), and place it in the root of the rom folder (Roms/SCUMMVM). The file must contain the game's "short name" which can be found here: https://www.scummvm.org/compatibility/2.7.0/. (This requires Onion V4 and an updated ScummVM package - done via Package Manager). Example Game folder: Roms/SCUMMVM/The Secret of Monkey Island/ ScummVM file: Roms/SCUMMVM/The Secret of Monkey Island.scummvm, contents: scumm:monkey Audio Troubleshooting We recommend sourcing original .sou audio files for Full Throttle, The Dig and The Curse of Monkey Island to avoid audio issues (such as missing speech or dropping out).

SquirrelJME ⚠

Emulator: squirreljme_libretro Note: This core is still under development and not yet capable of running games. You can follow the developer on reddit

TIC-80 ✔

Emulator: lr-tic80 Rom Folder: TIC Extensions: .tic Bios: None

Rom Folders - Quick Reference

For convenience, a list of Rom folder names for all fully supported cores is detailed below.

IMPORTANT

• If they do not already exist on your SD card, Onion will create rom directories as required during first install.
• All names are case sensitive and may differ from the names on the stock Miyoo SD card.
• This list does not include expert emulators.

System	Rom Folder (Case Sensitive)
Amiga	AMIGA
Amstrad CPC	CPC
Arcade (Mame 2003+)	ARCADE
Atari 2600	ATARI
Atari 5200	FIFTYTWOHUNDRED
Atari 7800	SEVENTYEIGHTHUNDRED
Atari Lynx	LYNX
Bandai Sufami Turbo	SUFAMI
Bandai WonderSwan & Color	WS
Capcom Play System 1	CPS1
Capcom Play System 2	CPS2
Capcom Play System 3	CPS3
ColecoVision	COLECO
Fairchild Channel F	FAIRCHILD
Famicom Disk System	FDS
Game & Watch	GW
GCE Vectrex	VECTREX
Magnavox Odyssey 2	ODYSSEY
Mattel Intellivision	INTELLIVISION
Mega Duck	MEGADUCK
MS-DOS	DOS
MSX - MSX2	MSX
NEC SuperGrafx	SGFX
NEC TurboGrafx CD	PCECD
NEC TurboGrafx-16	PCE
Nintendo Entertainment System	FC
Nintendo Game Boy	GB
Nintendo Game Boy Advance	GBA
Nintendo Game Boy Color	GBC
Nintendo Pokemini	POKE
Nintendo Satellaview	SATELLAVIEW
Nintendo Super Game Boy	SGB
Nintendo Super Nintendo	SFC
Nintendo Virtual Boy	VB
PICO-8	PICO
Ports collection	PORTS
ScummVM	SCUMMVM
Sega 32X	THIRTYTWOX
Sega CD	SEGACD
Sega Game Gear	GG
Sega Genesis	MD
Sega Master System	MS
Sega SG-1000	SEGASGONE
Sinclair ZX Spectrum	ZXS
SNK NeoGeo	NEOGEO
SNK NeoGeo CD	NEOCD
SNK NeoGeo Pocket & Color	NGP
Sony Playstation	PS
TIC-80	TIC
VideoPac	VIDEOPAC
Watara Supervision	SUPERVISION