Assembly Operating System from scratch
Concepts you may want to know beforehand: terminal, compiler, emulator, nasm, qemu
This project was created with its sole purpose of studying assembly by NASM for a College project at Metropolitan University of Technology (Chile), as a research about how Assembly NASM works on this subject 'Computer Organization' with our professor help PhD. Michael Miranda, he helps us find resources, ideas and implementation about how things should work on ASM.
Our code is merely taken by two githubs repositories MikeOS and cfenollosa/os-tutorial, modified them and had learn how they work, some minor changes applies had been done, and I'm not taking credits of any of this work, if you want to know more about this implementation and how its done, I suggest to go to MikeOS Offical Site as well as NASM Oficcial documentation. Kudos to them.
This project works on nasm and uses qemu as a machine emulator so if you haven't already installed it, make sure to have it installed in order to compile our code.
On a mac, install Homebrew and then brew install qemu nasm
On Linux, install from you prefered package manager, such as sudo apt-get install build-essential qemu nasm
On Windows, you have to install it with their guidelines, if not, change to Linux with a VM.
To compile assembly with nasm, you have to write this simple command on your terminal in your file folder:
nasm filename.asm -o filename.bin
if it's good it will not show any errors
To use QEMU as machine emulator, you have write this command on your terminal:
qemu-system-x86_64 filename.bin
or use this instead
qemu-system-x86_64 -M accel=kvm:tcg -soundhw ac97 -m 1024 -drive file="filename.bin",format=raw
Later on You can use our sh file to do some recursive compiling and add some disk images to better handling this situation.
Our goals to code in our code are this:
- Boot from sratch, without GRUB
- Enter 32-bit mode
- Build Kernel
- Screen input and output
- Write filesystem to store and delete files
- User mode
- Create a shelk
- add some video-games
- GUI