RetroCompass
RetroCompass

X55 — Custom firmware

Quick answer

Button combo

balenaEtcherwrite CFW imageTF1 slot

Steps

  1. 1Pick a CFW: ROCKNIX (dedicated RK3566-X55 image), ArkOS, or Batocera (generic RK3566).
  2. 2Download the matching X55/RK3566 image (.img.gz or .img) from the project's releases page.
  3. 3Write it to a 16GB+ microSD card with balenaEtcher.
  4. 4Power off, insert the card into the TF1 (OS) slot, and power on to boot the CFW.
  5. 5Complete first-boot setup (Wi-Fi, partition expansion), then add ROMs to the TF2 card.
Last verified: 2026-06-20Source: rocknix.org

The X55 is well supported by custom firmware. ROCKNIX (the successor to the stock JELOS build) offers a dedicated RK3566-X55 image and is the most actively maintained choice; ArkOS is also supported, and Batocera runs via its generic RK3566 build. All are written to a microSD card with balenaEtcher and booted from the TF1 slot, leaving your TF2 games card in place.

FAQ

Which CFW is best for the X55?
ROCKNIX is the most up-to-date and has a dedicated X55 image. ArkOS is a lighter, simpler alternative, and Batocera suits users who prefer that ecosystem.
Does installing CFW erase the stock OS?
No, if you flash to a separate card. The stock OS lives on its own microSD, so swapping cards lets you return to stock at any time.

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