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Guides & notes
How-tos and fixes for retro handhelds, from things we actually ran into.
Play PortMaster games on Anbernic's stock OS with Game Manager
Anbernic's stock OS can't run today's PortMaster games on its own. Game Manager now sets up PortMaster for you, installs the games and starts them. Here's how.
Play your own Minecraft: Java Edition on the Anbernic RG40XXH (stock OS)
PortMaster's Minecraft Java port doesn't run on Anbernic's stock OS as it is. With the free PocketKode Port Bridge and your own copy of Minecraft 1.12.2, it does. Here's how, step by step.
Copy files to Anbernic's stock OS over Wi-Fi: SFTP or Wi-Fi Transfer
Two ways to move games and saves between your PC or phone and an Anbernic RG40XXH running its stock OS, without taking the SD card out: the built-in SFTP, and the Wi-Fi Transfer app.
Copy files to muOS over Wi-Fi: SFTP, Filebrowser or Wi-Fi Transfer
Three ways to move games, saves and apps between your PC or phone and a muOS handheld without taking the SD card out: SFTP, the built-in Filebrowser, and Wi-Fi Transfer.
muOS ROM folder names: which folder each system goes in
The folder names muOS recognises by itself (GB, GBA, SNES, PS, PSP and hundreds more), how it matches them, and what to do when a system isn't on the list.
Where muOS keeps your saves, and how to back them up or move them
In-game saves and save states on muOS: the exact folders, why a save can seem to vanish after changing emulator, and how to back up or move your saves.
How to free blocked space on a muOS SD card (Anbernic RG40XXH)
Your muOS card says it is fuller than your files? A copy that was cut off can leave space blocked. Free it with a disk check on a Mac or PC.
Internet radio and podcasts on your Anbernic RG40XXH (muOS), with the screen off
Listen to thousands of radio stations and your podcasts on a muOS handheld: find stations, save favourites, download episodes and turn the screen off to save battery.
Test a new or used RG40XXH: stick drift, fake SD card, dead pixels
Check a new or used Anbernic RG40XXH in a few minutes, right on the device: every button, stick drift, fake or failing SD cards, battery life, both speakers and dead pixels.
Back up your whole muOS SD card over Wi-Fi, without taking it out
Make a full backup of the muOS SD card in your Anbernic RG40XXH from a PC browser, with games, saves and settings, no card reader needed. Restore it to a new card with Rufus or Etcher.
The best free homebrew games for the Anbernic RG40XXH (muOS)
Top-rated free homebrew for Game Boy, Game Boy Color, GBA and NES, plus free PC games from PortMaster, all legal to download and ready to play on muOS.
Install apps on muOS: .muxapp and .muxzip files with Archive Manager
Install, update and remove muOS apps on the Anbernic RG40XXH: where .muxapp and .muxzip files go, what Archive Manager does, and how to keep your settings when you update.
How to install free homebrew games on muOS with Game Manager
Browse, check and install free homebrew from Homebrew Hub, itch.io and PortMaster right on your RG40XXH, then manage every game on your SD card from one place.
Getting the PortMaster Minecraft Java port to work on the Anbernic RG40XXH (muOS)
The PortMaster Minecraft port is only a launcher. Here is which Minecraft Java files it needs, where they go on muOS, and fixes for the problems we hit.