#Directx and reactos drivers#
Abstraction is provided by standard system drivers (class or port drivers) No network support in the kernel itself.
#Directx and reactos windows#
Relatively stable kernel ABI Kernel design is almost identical to DEC RSX-11 and VMS, with DOS, OS/2 and Windows 95 influences RSX-11, VMS and Windows NT were designed by the same engineer (Dave Cutler) Windows NT was initially developed as a new kernel for OS/2 No device abstraction in the kernel itself. The kernel has backdoors to let the X server talk directly to the hardware, to keep the complexity of video drivers outside of the sensitive environment of kernel modeĩ Linux architecture Applications X server Application libraries libc System calls Signals Direct I/O System Call Interface VFS PM MM Network stack Kernel User mode Kernel mode Arch Device drivers Disk CPU MMU Devices Video card Virtual Physicalġ0 Windows (NT) architecture Monolithic kernel. Filesystem abstraction (VFS) UNIX API (libc) on top of a small UNIX-like system call and signals interface Other APIs (audio, application setup, desktop environment integration, cryptography, etc.) are de facto standards from third parties The graphic subsystem (X server) is in a category of its own. No kernel ABI UNIX process management and security model Native networking support Sockets, pipes select, poll, etc. from Milano Senior ReactOS developer (since 2001)Ĥ What does Windows mean WINDOWS ARCHITECTUREĥ ReactOS is Windows ReactOS has the same identical architecture as Windows, for maximum compatibility Windows drivers require a Windows kernel Many applications (firewalls, antivirus, media players, PDA sync software, etc.) come with special drivers Windows architecture is quite different from Linux and not as well known Let s start from the basicsĦ Operating system architecture Abstraction of CPU time and context (processes, threads, signals, etc.) Abstraction of memory (virtual memory, paging, stacks, heaps, etc.) Separation between system and applications through CPU s built-in memory protection (user mode vs kernel mode) Separation between hardware and applications through CPU s built-in I/O privilege mechanisms Mechanisms to bypass OS protection features in a controlled, secure way (system calls, security subsystem, etc.)ħ Virtual Physical Operating system architecture Applications Kernel User mode Kernel mode User HardwareĨ Linux architecture Monolithic kernel.
#Directx and reactos code#
1 ReactOS is (not) Windows Windows internals and why ReactOS couldn t just use a Linux kernelĢ ReactOS is (not) Windows ReactOS is Windows Runs Windows applications Runs Windows drivers Looks like Windows ReactOS is not Windows ReactOS is a free, open source project ReactOS reuses open source code from other projects You can make your own Windowsģ Who am I? Michele KJK::Hyperion C.
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