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https://github.com/LemonOSProject/LemonOS
The Lemon Operating System
https://github.com/LemonOSProject/LemonOS
c cpp kernel lemon operating-system os osdev
Last synced: 23 days ago
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The Lemon Operating System
- Host: GitHub
- URL: https://github.com/LemonOSProject/LemonOS
- Owner: LemonOSProject
- License: bsd-2-clause
- Created: 2019-05-12T11:16:47.000Z (about 5 years ago)
- Default Branch: master
- Last Pushed: 2024-03-06T23:54:54.000Z (4 months ago)
- Last Synced: 2024-03-07T00:41:30.805Z (4 months ago)
- Topics: c, cpp, kernel, lemon, operating-system, os, osdev
- Language: C++
- Homepage: https://lemonos.org
- Size: 223 MB
- Stars: 1,151
- Watchers: 29
- Forks: 59
- Open Issues: 12
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Lists
- awesome-stars - LemonOSProject/LemonOS - The Lemon Operating System (C++)
- awesome-osdev - Lemon OS - Lemon OS is a UNIX-like 64-bit operating system written in C++. (Projects / Operating Systems)
README
[](https://github.com/LemonOSProject/LemonOS/actions/workflows/ci.yml)
Lemon OS is a UNIX-like 64-bit operating system written in C++.
## About Lemon OS
Lemon OS includes its own [modular kernel](Kernel) with SMP and networking, [window server/compositor](System/LemonWM) and [userspace applications](Applications) as well as [a collection of software ports](Ports).
If you have any questions or concerns feel free to open a GitHub issue, join our [Discord server](https://discord.gg/NAYp6AUYWM) or email me at [email protected].
## [Website](https://lemonos.org)
## [Discord Server](https://discord.gg/NAYp6AUYWM)
## [Building Lemon OS](Documentation/Build/Building-Lemon-OS.md)
## Prebuilt Image
[Nightly Images](https://github.com/LemonOSProject/LemonOS/releases)
**Before running**
See [System Requirements](#system-requirements)
\
[More screenshots](Screenshots)
## Features
- Modular Kernel
- Symmetric Multiprocessing (SMP)
- UNIX/BSD Sockets
- Network Stack (UDP, TCP, DHCP)
- A small HTTP client/downloader called [steal](Applications/Steal)
- Window Manager/Server [LemonWM](System/LemonWM)
- [Terminal Emulator](Applications/Terminal)
- Writable Ext2 Filesystem
- IDE, AHCI and NVMe Driver
- Dynamic Linking
- [mlibc](https://github.com/managarm/mlibc) C Library Port
- [LLVM/Clang Port](https://github.com/LemonOSProject/llvm-project)
- [DOOM Port](https://github.com/LemonOSProject/LemonDOOM)
- [Audio Player (using ffmpeg)](Applications/AudioPlayer)
## Work In Progress
- XHCI Driver
- Intel HD Audio Driver
## Third Party
Lemon OS depends on:
[mlibc](https://github.com/managarm/mlibc), [Freetype](https://freetype.org/), [zlib](https://z-lib.org/), [libressl](https://www.libressl.org/), [ffmpeg](https://ffmpeg.org/), [libfmt](https://fmt.dev), [libjpeg-turbo](https://libjpeg-turbo.org/) and [libpng](http://www.libpng.org/pub/png/libpng.html).
[Optional ports](Ports/) include LLVM/Clang, DOOM, Binutils and Python 3.8
[Various background images are located here](Base/lemon/resources/backgrounds)
## System requirements
- 256 MB RAM (512 is more optimal)
- x86_64 Processor supporting [x86_64-v2 instructions](https://en.wikipedia.org/wiki/X86-64#Microarchitecture_levels) including SSE4.2
- For QEMU/KVM use `-cpu host` or at least `-cpu Nehalem` see [this page](https://qemu-project.gitlab.io/qemu/system/target-i386.html)
- 2 or more CPU cores recommended
- I/O APIC
- ATA, NVMe or AHCI disk (AHCI *strongly* recommended)
For QEMU run with: \
```qemu-system-x86_64 Lemon.img --enable-kvm -cpu host -M q35 -smp 2 -m 1G -netdev user,id=net0 -device e1000,netdev=net0 -device ac97``` \
**KVM is strongly recommended**
## Repo Structure
| Directory | Description |
| ------------------ | ---------------------------------------- |
| Applications/ | Userspace Applications |
| Base/ | Config, etc. Files copied to disk |
| Documentation/ | Lemon OS Documentation |
| Extra/ | (Currently) vector icons |
| InterfaceCompiler/ | Compiler for interface definition files |
| Kernel/ | Lemon Kernel |
| LibGUI/ | LibGUI (Windowing and widgets) |
| LibLemon/ | LibLemon (Lemon API) |
| Toolchain/ | Toolchain build scripts and patches |
| Ports/ | Build scripts and patches for ports |
| Resources/ | Images, fonts, etc. |
| Screenshots/ | Screenshots |
| Scripts/ | Build Scripts |
| Services/ | Interface definition files |
| System/ | Core system programs and services |