Just Enough Linux Operating System (JELOS) is an immutable Linux distribution for handheld gaming devices developed by a small community of enthusiasts. Our goal is to produce an operating system that has the features and capabilities that we need, and to have fun as we develop it.

Features

• JELOS has a very active community of developers and users.
• Integrated cross-device local and remote network play.
• In-game touch support on supported devices.
• Fine grain control for battery life or performance.
• Includes support for playing Music and Video.
• Bluetooth audio and controller support.
• Supports HDMI audio and video out.
• Device to device and device to cloud sync with Syncthing and rclone.
• VPN support with Wireguard, Tailscale, and ZeroTier.
• Includes built-in support for scraping and retroachievements.

Screenshots

System View	Menu View	Game List

Community

The JELOS community utilizes Discord for discussion, if you would like to join us please use the link below.

• https://discord.gg/seTxckZjJy

Licenses

JELOS is a Linux distribution that is made up of many open-source components. Components are provided under their respective licenses. This distribution includes components licensed for non-commercial use only.

JELOS Branding

JELOS branding and images are licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

You are free to

• Share — copy and redistribute the material in any medium or format
• Adapt — remix, transform, and build upon the material

Under the following terms

• Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
• NonCommercial — You may not use the material for commercial purposes.
• ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.

JELOS Software

Copyright 2021-present Fewtarius

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Documentation

Documentation For Developers

• Building The Distribution
• Contributor Code of Conduct
• Contributing to JELOS
• Adding Hardware Quirks
• Creating Packages
• Pull Request Template

Documentation For Everyone

• Installation and Device Support
• Device Specific Documentation
• Donating to JELOS
• Frequently Asked Questions
• Hotkeys and Button Codes
• Optimizing Performance and Battery Life

Using JELOS

• Setting Up Cloud Drives
• Setting Up Syncthing
• Game Engines and Launch Files
• Configuring Moonlight Streaming
• Setting Up P2P Networking With ZeroTier
• Configure TailScale VPN
• Setting Up Wireguard VPN
• Creating Custom Shader Presets for Per Game / Per System Use

Device Support

JELOS supports a variety of ARM and Intel/AMD based devices¹.

Manufacturer	Device	CPU / Architecture	Kernel	GL driver	Interface
Anbernic	RG351P/M	Rockchip RK3326 (ARM)	Mainline Linux	Panfrost	Weston + EmulationStation
Anbernic	RG353P2	Rockchip RK3566 (ARM)	Rockchip BSP 4.19	Mali	KMS/DRM + EmulationStation
Anbernic	RG353M2	Rockchip RK3566 (ARM)	Rockchip BSP 4.19	Mali	KMS/DRM + EmulationStation
Anbernic	RG353V2	Rockchip RK3566 (ARM)	Rockchip BSP 4.19	Mali	KMS/DRM + EmulationStation
Anbernic	RG353VS2	Rockchip RK3566 (ARM)	Rockchip BSP 4.19	Mali	KMS/DRM + EmulationStation
Anbernic	RG503	Rockchip RK3566 (ARM)	Rockchip BSP 4.19	Mali	KMS/DRM + EmulationStation
Anbernic	RG552	Rockchip RK3399 (ARM)	Mainline Linux	Panfrost	Weston + EmulationStation
Anbernic	Win600	AMD Athlon Silver 3050e (x86_64)	Mainline Linux	Radeonsi	Weston + EmulationStation
Atari	VCS	AMD Ryzen R1606G (x86_64)	Mainline Linux	Radeonsi	Weston + EmulationStation
AOKZOE	A1 Pro	AMD 7840u (x86_64)	Mainline Linux	Radeonsi	Weston + EmulationStation
AYANEO3	Air / Air Pro	Amd Ryzen 5 5560U / AMD Ryzen 7 5825U (x86_64)	Mainline Linux	Radeonsi	Weston + EmulationStation
AYANEO3	Air Plus	Amd Ryzen 7 6800U / (x86_64)	Mainline Linux	Radeonsi	Weston + EmulationStation
AYANEO3	AYANEO 2	Amd Ryzen 7 6800U / (x86_64)	Mainline Linux	Radeonsi	Weston + EmulationStation
GPD	Win 4	Amd Ryzen 7 6800U / (x86_64)	Mainline Linux	Radeonsi	Weston + EmulationStation
GPD	Win Max 2 (2022)	Amd Ryzen 7 6800U / (x86_64)	Mainline Linux	Radeonsi	Weston + EmulationStation
Hardkernel	Odroid Go Advance	Rockchip RK3326 (ARM)	Mainline Linux	Panfrost	Weston + EmulationStation
Hardkernel	Odroid Go Super	Rockchip RK3326 (ARM)	Mainline Linux	Panfrost	Weston + EmulationStation
Hardkernel	Odroid Go Ultra	Amlogic S922X / Mali G52 M6 (ARMv8-A)	Mainline Linux	Mali	Weston + EmulationStation
Indiedroid	Nova	Rockchip RK3588S / Mali G610 (ARMv8-A)	Rockchip 5.10 BSP Linux	Panfrost	Weston + EmulationStation
Orange Pi	Orange Pi 5	Rockchip RK3588S / Mali G610 (ARMv8-A)	Rockchip 5.10 BSP Linux	Panfrost	Weston + EmulationStation
Powkiddy	RGB10 Max 3 Pro	Amlogic A311D / Mali G52 M4 (ARMv8-A)	Mainline Linux	Mali	Weston + EmulationStation
Powkiddy	RK2023	Rockchip RK3566 (ARM)	Rockchip BSP 4.19	Mali	KMS/DRM + EmulationStation
Powkiddy	x55	Rockchip RK3566 (ARM)	Rockchip BSP 4.19	Mali	KMS/DRM + EmulationStation

¹ While not technically supported, JELOS is known to work well on a variety of generic x86_64 devices including gaming PCs, mini PCs, and laptop computers.

² Anbernic RG353P/M/V/VS devices with both v1 and v2 displays are supported. RG353PS will not be supported.

³ To boot JELOS on Ayaneo devices, hold LC and volume up and press the power button, continue holding "LC" and volume up until the Ayaneo logo appears. Select the storage device with JELOS from the boot menu using the Ayaneo button, and then press volume up to boot the distribution.

Installation

• JELOS is installed by restoring an image file and Flashing to a device's internal storage or an external sd card.
• On x86 devices JELOS includes an installation tool. The installation tool can be found in the tools menu, which is one of the systems listed within ES.
• JELOS operating system is stored on an Ext4 partition that can be read by LINUX but is not natively readable on Windows. Currently it is not possible to access the primary JELOS Ext4 partition on Windows to transfer roms.
• On devices that support a second sd card, the sd card can be formatted as Ext4, FAT32, or exFAT. JELOS will automatically detect the second SD card on boot and configure the relevant folders for storing roms.
• External services are disabled by default in release builds. When enabled, the username for ssh and samba access is "root". The root password is generated during every boot, it can be found in the System Settings menu.

Flashing

• Download the latest version of JELOS (.img.gz) for your device.
• Decompress the image.
• Write the image to an SDCARD using an imaging tool. Common imaging tools include Balena Etcher, Raspberry Pi Imager, and Win32 Disk Imager. If you're skilled with the command line, dd works fine too.

Upgrading

• Download and install the update online via the System Settings menu.
• Download the latest version of JELOS (.tar) for your device.
• Copy the update to your device over the network to your device's update share.
• Reboot the device, and the update will begin automatically.

Credits

Like any Linux distribution, this project is not the work of one person. It is the work of many persons all over the world who have developed the open source bits without which this project could not exist. Special thanks to CoreELEC, LibreELEC, and to developers and contributors across the open source community.