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Mirror for MikeOS 4.4 - Simple and educational Operating System written by Mike Saunders

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MikeOS -- Open source 16-bit operating system for x86 PCs
Copyright (C) 2006 - 2013 MikeOS Developers -- see doc/LICENSE.TXT

MikeOS is a 16-bit real mode operating system for x86-compatible PCs, 
written entirely in assembly language, which boots from a floppy disk,
CD-ROM or USB key. It features a text-based dialog-driven user
interface, a command-line, support for FAT12 (MS-DOS-like) floppy
disks, sound (PC speaker), text editor, BASIC interpreter and more.
The kernel includes over 60 system calls.

MikeOS is a learning tool for those wishing to understand simple OS 
construction and x86 assembly. Quick getting-started guide: MikeOS can 
run from a floppy disk or CD-ROM, either on an emulator or a real PC. 
See the disk_images/ directory for files that you can write to the 
appropriate media or boot in, for instance, VMware, QEMU or VirtualBox.

You can find the source code in the source/ directory, and sample 
programs (included on the disk images) in the programs/ directory.
See the doc/ directory for more info, including:

 # handbook-user.html -- How to run and use MikeOS

 # handbook-appdev-basic.html -- Writing software in BASIC
 # handbook-appdev-asm.html -- Writing software in assembly
 # handbook-sysdev.html -- Building and modifying the OS

 # LICENSE.TXT -- The open source, BSD-like license
 # CHANGES.TXT -- Detailed list of changes in previous releases
 # CREDITS.TXT -- People involved in the project

Have fun, and see the website at

 -- Mike Saunders (


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