The system is very experimental, yet FreeNOS currently supports:

• Virtual memory
• Simple task scheduling
• Inter Process Communication (IPC)
• Devices:
  • VGA/Keyboard consoles (also supported by Ed's libteken )
  • i8250 serial UART
  • PCI host controller
  • CMOS RTC clock
  • ATA host controller
• Filesystems:
  • Virtual file system (VFS)
  • Process file system (ProcFS)
  • Temporary file system (TmpFS)
  • Extended 2 file system (Ext2FS)
  • Linnenbank file system (LinnFS)
• POSIX, ANSI C libraries
• Dynamic and Shared memory
• All sources documented with Doxygen
• User and kernel code written from scratch in C++
• Very small microkernel (~2K lines of C++ code including a tiny part in x86 assembly)
• Builds with recent GCC , LLVM and SCons versions on POSIX systems