Kernel

Writing a kernel from scratch is to print something on screen. Using a VGA(Visual Graphics Array), a hardware system that controls the display. We will use GNU GRUB to load our kernel because it supports a multiboot of many operating systems.

Requirements

• GNU/Linux
• Assembler - I am using Flat Assembler (FASM) to instruct the bootloader for loading the starting point of our kernel.
• GCC - GNU Compiler Collection a cross compiler. A newer version of GCC. I am using 13.3.0 version of GCC.
• Xorriso - A package that creates, loads, manipulates ISO 9660 filesystem images.(man xorriso)
• grub-mkrescue - Make a GRUB rescue image, this package internally calls the xorriso functionality to build an iso image.
• QEMU - Quick EMUlator to boot our kernel in virtual machine without rebooting the main system.

Output