RetroCompass
RetroCompass

RG40XX V — Custom firmware

Quick answer

Button combo

POWER(boot CFW from TF1)

Steps

  1. 1Pick a publicly released H700 CFW that supports this model: muOS, Knulli, ROCKNIX or Batocera.
  2. 2Download the device build and flash it to a spare TF1 (OS) microSD with balenaEtcher.
  3. 3Keep your ROMs on the TF2 card; the CFW reads games from the second card.
  4. 4Put the CFW card in TF1 and the ROM card in TF2, then press POWER to boot.
  5. 5For ROCKNIX on H700, copy the matching .dtb to the card root and rename it dtb.img before first boot.
Last verified: 2026-06-20Source: anbernic.com

The RG40XX V is a supported Allwinner H700 target, so you can run community systems such as muOS, Knulli, ROCKNIX and Batocera by writing their public image to a microSD with balenaEtcher and booting from the TF1 (OS) slot; your ROMs stay on TF2. Each system lives on its own card, so you can keep the genuine Anbernic card and swap cards to switch systems without erasing anything. This vertical model has a 4-inch 640x480 4:3 screen and a single RGB analog stick whose lighting can be set in the system menu. GarlicOS does not run on H700, and MinUI support varies by release, so always use a publicly released build that lists this device. This is a DRAFT for human review.

FAQ

Which slot does custom firmware boot from?
On H700 devices the CFW boots from the TF1 (OS) slot, the same slot the stock OS uses. ROMs go on TF2.
Can I keep stock Anbernic OS too?
Yes. Write the CFW to a separate TF1 card and swap cards; your original Anbernic system card is untouched.

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