Hands on to Operating Systems- My own OS called ChamoOS

This is the simple operating system I have created, called ChamoOS. It is written in 16-bit x 86 real mode assembly language. This OS gives user the information of the hardware.


  • Linux
  • QEMU PC emulator
  • NASM assembler

I have created the kernal.asm using the basic functions and operations using JOSH OS tutorial. And I have changed relevant assembly codes to display hardware information. I have used the same bootload which I have in reference material, to change to boot the operating system. The OS is booted from the floppy image. For that I have used the image from the MikeOS named operating system.


build-linux.sh after any changes done just need to compile this program then it will rearrange and ready for execution. in linux you can write “sudo bash ./build-linux.sh” in the terminal and compile the program.

disk_images contain flp and iso for images. OS will boot up in a virtual PC. If you want to use it on a real PC, you can write the floppy disk image to a real floppy and boot from it, or generate a CD-ROM ISO image.build

source/bootload bootload.asm contains bios program and bootload.bin machine language.

soruce/features keyboard.asm contain keyboard programs

source kernal.asm is main starting program after bootload.asm finishes kernal.asm will run

Here you can see my source code for the operating system called ChamoOS.




Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store