RetroCompass
RetroCompass

RGB20SX — Firmware update

Quick answer

Button combo

balenaEtcherwrite RK3566 imagemicroSD in TF-OS slot

Steps

  1. 1Download the latest RGB20SX OS image (stock ROCKNIX, formerly JELOS) as an .img.gz file from the project's releases page.
  2. 2Insert a 16GB+ microSD card into your PC with a card reader and open balenaEtcher.
  3. 3Choose Flash from file, select the RGB20SX image, pick the microSD card, then click Flash.
  4. 4Power the RGB20SX off, place the card in the TF-OS slot, and power on to boot the updated image.
  5. 5With a current ROCKNIX build, you can instead connect Wi-Fi and run the in-OS online update.
Last verified: 2026-06-20Source: rocknix.org

The Powkiddy RGB20SX is an RK3566 Linux handheld whose OS runs from a microSD card, so updating firmware means writing a fresh OS image rather than patching a locked ROM. Download the RK3566 RGB20SX image, write it with balenaEtcher, and boot from the TF-OS slot. Current ROCKNIX builds also support an over-the-air update from the system menu once Wi-Fi is connected.

FAQ

Which microSD slot holds the OS?
The TF-OS slot holds the OS image. The second slot, TF-GAME, is for your ROMs and games.
Do I have to re-flash for every update?
No. Once ROCKNIX is installed it can update itself over Wi-Fi from the system menu; re-flashing is only needed to switch OS or recover a broken card.

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