• Install GRUB to a virtual image

• Write an ASM boot code that handles multiboot header, and use GRUB to init and call main function of the kernel itself

• Write basic kernel code of the choosen language ( in our case C )

• Compile it with correct flags and link it to make it bootable

• Write some helpers like kernel types or basic functions ( like libft )

• The work must not exceed 10 MB

• Code the interface between your kernel and the screen

• Display 42 on the screen

• You must create a linker file with ld to combine everything in the kernel binary.

Directive are not translated to machine code, it give a clue to the assembler how the program should compile. Instruction will be translated to machine code and executed by the cpu.

Youtube -> Nanobyte OSDEV

Create an empty file with dd : dd if=/dev/zero of=./kfs.img bs=1M count=10 Mount this image using loop device. Use sfdisk on this loop device. Partition the image as ext2 ( carefull to not partition the entire image but only the /dev/_p1 ) Then mount the image on a host folder and create /boot entry. Using grub from the host install it on the mounted image. grub-install --target=i386-pc /dev/loop0

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ld grub nasm gcc partx qemu