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 Home » Freeware Downloads » Operating Systems » MikeOS v4.7.0   
File - Download MikeOS v4.7.0

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MikeOS v4.7.0

An operating system for x86 PCs, written in assembly language.

It is a learning tool to show how simple 16-bit, real-mode OSes work, with well-commented code and extensive documentation.

  • A text-mode dialog and menu-driven interface
  • Boots from a floppy disk, CD-ROM or USB key
  • Over 60 system calls for use by third-party programs
  • File manager, text editor, image viewer, games...
  • Includes a BASIC interpreter with 46 instructions
  • PC speaker sound and serial terminal connection

The code is completely open source (under a BSD-like license), and is written by Mike Saunders and other developers.

The .zip file:
The download contains the source code (see the source and programs directories), along with disk images for floppies/USB keys and CD-Rs in the disk_images folder.

Writing images:
You can write the images to a floppy disk, USB key or CD-R and boot your PC from them to test -- or use a PC emulator such as QEMU, VirtualBox or VMware. See the User Handbook below for a guide.

System requirements:
Minimum 386 PC with a keyboard and 1MB of RAM.

The Handbooks are also included with MikeOS, in the doc directory.

4.7.0 (9 April 2022)
# Many updates to programs/edit.asm from Pablo Gonzalez and Mark M:
add support for more than screen-visible columns; show filename on top;
show current line and column; add "open file" option; remove
unnecessary screen redraws
# Many updates to programs/monitor.asm: separate commands to input and
execute code; 'd' command added to dump (in hex) a specified range
of memory to the screen; 'p' command added to poke (insert) a byte
into a memory location; code can now be entered in lower-case
# Added programs/vedit.asm from John Endler: a Vi-like text editor
# Added programs/editbin.asm from John Endler: a binary file editor
# Added programs/codebyte.asm from John Endler: a machine code byte
editor (plus sample file hello.512)
# Added programs/life.asm from John Endler: an implementation of Conway's
Game of Life
# Added programs/pong.asm from John Endler: a retro Pong-like game
(press Esc to exit)
# Added programs/line.asm from John Endler: a demo using VGA video mode
(press F to speed up, S to slow down, C to clear and Esc to exit)
# Updated programs/forth.asm to version 1.53 (from Walt Nagel)
# Added programs/gen.4th (referenced in the Forth manual)
# source/features/disk.asm: updated os_get_file_list and int_filename_convert
to handle extensions with fewer than three bytes; create file uses actual
file creation date and time; full 32-bit file size returned in EBX
(transparent to older programs)
# source/features/string.asm: new system call: os_string_to_long_int
# source/features/math.asm: small update to pseudo-random number generator
# source/features/ports.asm: os_serial_port_enable returns modem status in AX
# source/features/screen.asm: added BP to register dump
# Updated API version to 18, for new system call mentioned above
# Renamed programs/serial.asm to programs/terminal.asm
# Renamed to
# Updated programs/sample.pcx
# Documentation fixes and updates

Click here to visit the author's website.
Continue below for the main download link.

Downloads Views Developer Last Update Version Size Type Rank
1,807 3,059 Mike Saunders & Team <img src=""border="0"> Aug 02, 2022 - 12:52 4.7.0 768.9KB ZIP 5/5, out of 19 Votes.
File Tags
v4.7.0  MikeOS  
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