x86 or 80x86 is the generic name of a microprocessor architecture first developed and manufactured by Intel. The x86 architecture currently dominates the desktop computer, portable computer, and small server markets.
The architecture is called x86 because the earliest processors in this family were identified by model numbers ending in the sequence "86": the 8086, the 80186, the 80286, the 386, and the 486. Because one cannot establish trademark rights on numbers, Intel and most of its competitors began to use trademark-acceptable names such as Pentium for subsequent generations of processors, but the earlier naming scheme remains as a term for the entire family.
More on [ X86 architecture ]
Intel x86 Architecture :: Emulators
x86 :: Processors
DOS and Windows :: Disassemblers
x86 :: Assembly
Open Source :: Operating Systems

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BoxOS - Connects many open source projects together in one neat package; kernel, boot loader, graphical user interface, console user interface, applications, programming languages, drivers, file system support for BeOS, Linux, Windows 95/98/NT. [Open Source, GNU]
Domainatrix - Assembly language OS for Intel/AMD x86 architecture made specifically for serving the Web, written originally for the programmer's personal interest and education after moving to the PC platform from his old 8-bit machine. Philosophically similar to V2 OS.
Meta Description: [ Domainatrix - An assembly language web serving operating system. ]
Download Operating System: LSD - By LadSoft; developed years ago and improved since then; planed for redesign to make a viable OS; updates soon. Extant version is good sample of programming standard PC hardware (no PCI) and managing x86 pmode resources. [Copyrighted Freeware]
Hactar - Claims: all new, no equivalent design in extant OSs, an adventure into something really different, an answer to a What if? Runs on 386+, system disk is floppy, kernel size 32Kb; manages 4Gb RAM, 2Gb disk; semi-multitasking; unusual interface. [Open Source, WTOF PL]
HanoiOS - Self booting x86 OS implementation of Towers of Hanoi puzzle, very simple bootstrap loader and kernel; boots, presents shell-like prompt for valid integer input, used by kernel as count of disks to solve, prints list of moves.
Meta Description: [ Amit, Singh, Amit Singh, Art, Computer Art, Drawing, Painting, Sketching, Oil Painting, Crayons, Pastels, Pencil Colors, Audi, TT, Roadster, Quattro, Empeg, Rio, RioCar, MP3, IrDA, Debian, ARM, Embedded, Fitness, Hanoi, Hanoimania, Sega, Dreamcast, Sega Dreamcast, Nintendo, Gameboy, Advance, Nint... ]
PizziOS - One-user, segmented memory OS, written in pure x86 Assembly but may get some C, memory protection via segmentation, FAT-16/32. Main goals: small, fast. Will not be a Unix, but will use block shifting memory management scheme used in some old Unix. Downloads.
Plex86.org - Was FreeMWare. Extensible PC virtualization program to allow running multiple OSs at once on one processor. Runs as much OS and application software natively as possible, the rest emulated by PC virtualization monitor. [Open Source, LGPL]
RDOS - Multi-process/threaded protected mode OS for all i386+ systems, written in all 16-/32-bit Assembly in TASM, fully PROMable so can port to embedded systems with no keyboard and/or screen, stable and secure via segment protection and paging. [Open Source, GPL]
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ReWin - Rewriting Windows: new OS now being designed for computers with Intel (or compatible) i386, i.e., with multitasking functions built into the processor. Will be Windows compatible, but won't be a Windows clone: will give Windows executables the needed API so they can run correctly. English/Italiano.
ScottsNewOS - Runs on i386+ compatible, working GUI even on 4 MB. Coded in Assembly, C. Brief description, download link. [Open Source, GPL]
SkyOS - Open-source, full featured graphical (GUI) 32-bit operating system for x86 386+ architecture; network and Sound Blaster support, mice, video, and many file systems. Website shows requirements, screenshots, status, downloads, documentation, contacts, members, forum, mail list.
Meta Description: [ Official SkyOS website ]
SuperDOS - Multitasking, multiuser business OS; small (100K), integrated file system, low maintenance. Main purpose: fast business online transaction processing. Usually used in vertical markets such as transportation. Not a (unrelated to) DOS variant. By Bluebird Systems.
Synapse Operating Services - Protected mode, multitasking support, 32-bit; developed on x86-32, intended to run on x86-64 with some changes; DOS-like, but not fully compatible, use: to run ported DOS programs up to 512K. At SourceForge. [Open Source, BSD]
Meta Description: [ The world's largest development and download repository of Open Source code and applications ]
The Mobius: SourceForge - A few screenshots, details, links.
TriangleOS - 32-bit multitasking, multithreaded OS for x86 386+ CPUs, with GUI, FSs, applications, drivers, all in active development. Site has information, news, documents, screenshots, downloadable releases.
Visopsys - VISual OPerating SYStem: small, fast, home-brewed, open source OS kernel for x86. Includes project background, screenshots, source code and useful links for OS developers. [Open Source, GPL]
XAOS - Runs on i386+, 16-bit real mode, FAT12/16/32 (read-only, LFN support), coded in C++; downloads: binaries, source, utilities, game (tetris source); downloads. [Open Source]
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