Information

GammaOS Core is a minimal version of Android 13 TV (Based on LineageOS) suited for low powered devices with chipsets such as the Rockchip RK3566 and with no touchscreen required. It has been heavily modified to reduce memory footprint and introduce quality of life enhancements to your devices.

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Supported Devices

Anbernic

• RG ARC-D / RG ARC-S
• RG353V / RG353VS
• RG353P / RG353PS
• RG353M
• RG503

Powkiddy

• RGB30
• RGB20SX
• RGB10MAX3
• RGB20 PRO
• X55
• X35H
• X35S

GameMT

• E5 Plus
• E6 Plus

GKD

• Bubble

OTHERS

• CB408
• Miyoo Flip

TrimUI

• Smart Pro (https://github.com/TheGammaSqueeze/GammaOSCore/releases/tag/beta3_a133p)

MagicX

• Zero28 (https://github.com/TheGammaSqueeze/GammaOSCore/releases/tag/beta3_a133p)

Features

• Boot from SD card, you can keep your existing eMMC install intact (if applicable)
• Includes RetroArch preinstalled and preconfigured.
• Includes Daijisho preinstalled and preconfigured
• Includes MiXplorer (SD, FTP, Lan, Cloud and other storage explorers)
• Rooted, with Magisk support
• Quick Settings menu (by holding down Power button)
• Mouse emulation mode (by holding down Select and R1)
• Bluetooth Audio support
• MTP USB support for quick files access
• Improved CPU and Graphics performance on some units
• Improved battery life and standby time on some units
• Relaxed Scoped Storage enforcement, for easier access to your files
• HDMI output settings, insert HDMI cable, choose your setting and reboot for a better HDMI experience!

Shortcuts

Global Shortcuts

• Home button (on selected devices) + Right Stick Up/Down: Adjust brightness
• Home button (on selected devices) + Volume Button Up/Down: Adjust brightness
• Power Button (hold): Global shortcuts menu (Brightness, Performance Modes, Controller Settings, USB Options, Killing apps options)

RetroArch (on devices with a Home/Back/FN button)

• Home button (quick tap): Show RetroArch menu
• Home button (long press): Save state and exit RetroArch (will resume state on game relaunch). Useful with a launcher like ES-DE, similar to Game Switcher on OnionOS.

RetroArch (all devices)

• L3 + R3 (without hotkey): Show RetroArch menu
• Hotkey: Select or Home button
• L1: Slow Motion toggle
• L2: Save State
• R1: Fast Forward toggle
• R2: Load State
• X: Toggle FPS counter
• Y: Screenshot
• R3: Toggle Shader
• Right Stick Left/Right: Change Shader

Releases

Found here: https://github.com/TheGammaSqueeze/GammaOSCore/releases