GammaOS Next 1.4 is out with new micro-OS boots and DSi themes

This is just a round up of GammaOS news from the last month, and the big ticket item is the release of GammaOS Next 1.4 alongside GammaOS Nano v1.4. Developer TheGammaSqueeze rolled out the updates in late July, bringing a native micro-OS boot architecture to handhelds like the Anbernic RG DS and RG Rotate.

GammaOS originally launched in 2023 as a LineageOS-based custom firmware for Unisoc T618 handhelds like the Anbernic RG405M. The goal was to replace inefficient stock manufacturer software with optimized graphics pipelines and fixed input handling. GammaOS Next builds on that foundation using Android 13 and 14 GSI distributions, targeting newer hardware with more complex requirements.

Bypassing the Android boot sequence

GammaOS Nano operates as a low-level micro-OS running alongside the underlying GammaOS Next Android framework. Instead of waiting for a standard Android desktop to load, Nano intercepts the display panel and audio stack at power-on. This drops you directly into a lightweight console environment.

You can still switch dynamically between Nano mode and a full Android 14 desktop if you need to tweak underlying settings.

DSi menus and DraStic-Nano

The v1.4 update introduces several new interface themes, including a PlayStation 3 XMB layout, a minimal Minima frontend, and a Nintendo DSi System Menu adaptation. That last one pairs well with the Anbernic RG DS, a handheld built around a dual-screen layout specifically for Nintendo DS and 3DS emulation. The update also adds support for video wallpapers, in-game overlays, and an improved sleep mode to mitigate battery drain.

The release packages DraStic-Nano, a heavily tuned integration of the Nintendo DS emulator that supports RetroAchievements and quick-resume states. It works, which is the nicest thing I can say about trying to get standard Android emulators to behave seamlessly on niche hardware.

Booting Linux from the SD card

Beyond the Anbernic RG DS, version 1.4 extends support to the Anbernic RG Rotate, TrimUI Brick, and MagicX Mini Zero 28. The update also rolls out compatibility for various A133P-based devices, broadening the ecosystem.

The RG Rotate is a specialized handheld designed to swap display orientations between horizontal and vertical modes for arcade TATE mode emulation. GammaOS Next 1.4 introduces custom secondary stage bootloaders that enable users to boot Linux distributions directly from the SD card on supported hardware.

If you want to run ROCKNIX on the RG Rotate, you can now do so without wiping the internal Android installation. The firmware is available in both Full packages with Google Play Services and Lite packages focused on sideloading. The Lite version strips out Google's background services entirely, which frees up RAM and processor cycles for emulation tasks. You can read the full documentation for the GammaOS Nano v1.4 release and the GammaOS Next 1.4 update on Patreon.