dOS
Research OS written from scratch
Retro look, new code
OS Features
- Modern 64-bit Kernel
- Graphical User Interface
- 3D Graphics Stack (DirectX 12, Vulkan, OpenGL)
- Compute and Machine Learning Stack (CUDA)
- Network Stack (TCP, UDP, IPv4/IPv6, DHCP)
- USB Stack (USB 3.0, USB 2.0)
- Audio Stack (Server, Mixer)
- Win32 Subsystem (Run Windows applications!)
- Virtualization Hypervisor (Type-2)
- Terminal and Command-Line Utilities
- FAT32 (R/W), NTFS (R/W), ISO 9660
Videos and Screenshots
Supported Hardware
Kernel Features
- Preemptive multithreaded kernel
- Multi-core and hyperthreading support (SMP, SMT)
- Virtual memory
- Swap and copy-on-write support
- Mapped files and shared memory
- Automatic background paging (swapper)
- Process and memory protection (kernel and user mode)
- Exception handling (SEH, custom, try-catch)
- Virtual file systems with symbolic links
- Infinite file system cache
- Pipes and interprocess communication (IPC)
- Mountable and networked file systems
- DeviceFS, NetworkFS, PipeFS, RamDisk
- Extensible synchronization primitives
- Spinlock, Mutex, Futex, Event, Semaphore
- Deferred and asynchronous execution
- Deferred Procedure Calls (DPC)
- Asynchronous Procedure Calls (APC)
- PE executables and DLLs
- Loadable drivers and plugins
- WOW64: 32-bit processes on 64-bit systems
- Kernel profiling
- Event tracing (ETW)
- Debugging
- Breakpoints and stack traces
- Symbols and source-level debugging (PDB)
- Debugger support (LLDB)
Graphical User Interface
- Fast window manager
- DPI scaling
- Shell and File Explorer
- Native UI controls and menus
- Optimized rendering (AVX-512, AVX, SSE)
- Transparent windows
- Window regions
- Themes
Transparent windows with complex regions
Graphics and Compute APIs
Graphics
- DirectX 12 + Raytracing
- Vulkan 1.3 + Raytracing
- DirectX 11
- OpenGL 4.6+
Compute and Machine Learning
- CUDA 12.9 (Native / Driver API)
- CUDA Runtime (CUDART)
- cuBLAS
- cuDNN
DirectX 12 (Raytracing)
Doom 3: BFG Edition (OpenGL)
Volumetric Tracer (CUDA)
Win32 Subsystem
- Run Windows applications
- Applications run on both dOS and Windows
- Most dOS apps are standard Windows binaries
- Native performance
- Win32 API calls translated directly to native APIs
- Supported APIs
- UI: Win32 controls (partial)
- 3D: DirectX, Vulkan, OpenGL
- Compute / ML: CUDA
- Audio: XAudio2, WinMM
- Network: Winsock2
- Event tracing (ETW)
- Win32 and Win64 support
Virtualization Hypervisor
- Type-2 hypervisor
- Intel VMX and AMD SVM support
- Emulated hardware
- APIC, PIC, PIT, CMOS
- IDE controllers
- Intel E1000/E1000e
- VirtIO (disk, console)
- KVM-like interface
- Virtualized Ubuntu Linux (similar to WSL 2)
- Supported guests: Linux, Windows, FreeDOS
Ubuntu 64-bit VM running on dOS
Windows VM running on dOS
Terminal and Command Line
- Terminals
- VT100 support
- Console attachments
- Command-line utilities
- Cmd.exe and core utilities
- Pipes
- Batch files
- Development tools
- Clang, GCC, Make, NMAKE
- NASM, YASM, MASM
- C# Native AOT
- Python 3
- LLDB debugger
- Remote debugging with VS Code (LLDB)
Development tools
dOS compiling itself, Python 3, C#
Supported Hardware
- CPU: x64, x86
- Bus: PCI, MSI, MSI-X
- Boot: UEFI, BIOS, Network (PXE/TFTP)
- Disk: NVMe, AHCI, IDE
- USB: xHCI (3.0), EHCI (2.0)
- Network
- Realtek (8169/8125)
- Intel (E1000/E1000e)
- Broadcom (BCM5722D)
- Sound: Intel HDA, Ensoniq ES1371
- Hypervisor: Intel VMX, AMD SVM
Videos and Screenshots
DirectX 12 Raytracing
Doom 3: BFG Edition
Demos
Self-hosting (compiling itself)
