v0.1.0

The ROM list now shows subfolders of roms/, so ROMs can be grouped into folders (A opens one, B goes back up). Saves and per game settings still follow the file name, so moving a ROM into a folder keeps them. A new System info page, reachable from the settings and the in-game menu, shows CPU load and frequency, memory, SoC and GPU temperature, battery and free space.

Reflashing resets the GBA partition, so back up saves/ before writing this image.

v0.0.2

Long ROM names now scroll in the selected row, and the in-game menu has a Restart game item (press A twice to confirm, the save is written first). The settings screen from the ROM list is trimmed down to volume, brightness, CPU, audio and debug log; the LCD grid options live in the in-game settings where the game itself is the preview.

Reflashing resets the GBA partition, so back up saves/ before writing this image.

v0.0.1

First release. Boots a mainline 6.18 kernel straight into a small frontend that plays GBA games with gpSP or mGBA, with sleep on the power key, per-game settings, No-Intro names and GBA screen color correction.

Write the image to an SD card (for example with balenaEtcher or xz -dc rg251os-0.0.1.img.xz | sudo dd of=/dev/sdX bs=4M), boot it once so the GBA partition grows to fill the card, then copy ROMs into roms/. Sleep, the partition growth and the ROM name database are still lightly tested, so keep a copy of your saves. Reflashing resets the GBA partition.