RetroCompass
RetroCompass

RG ARC-S — Custom firmware

Quick answer

Button combo

POWER(boot CFW from TF1)

Steps

  1. 1Use a publicly released RK3566 build of ROCKNIX or Knulli for the RG ARC; do not use H700 images.
  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. 5Because there are no analog sticks, remap controls in the CFW menu for 3D systems if needed.
Last verified: 2026-06-20Source: anbernic.com

The RG ARC-S is a Rockchip RK3566 device, so its custom firmware must be the RK3566 build, never an H700 image. ROCKNIX and Knulli both officially support the RG ARC family; you flash their public RK3566 image to a microSD with balenaEtcher and boot it from the TF1 (OS) slot, with ROMs on TF2. muOS, Batocera and MinUI do not list the RG ARC-S, so they are not options here. Each system lives on its own card, so you can keep the genuine Anbernic card and swap cards to switch without erasing anything. This is a DRAFT for human review.

FAQ

Does muOS or Batocera work on the RG ARC-S?
No. They do not list the RG ARC-S. Use ROCKNIX or Knulli, and only their RK3566 builds (not H700).
Which slot does the CFW boot from?
The TF1 (OS) slot. Keep your ROMs on TF2. Swap cards to return to stock Anbernic OS.

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