crux161 / hey-bios

A stupid x86 bootloader that just writes a simple message to the screen... More functionality may follow.

hey-bios Bootloader

=========================

This is a simple x86_64 bootloader that prints the message "Hello, world!" to the screen.

Prerequisites

• NASM
• QEMU

Compiling and Running

To compile and run the bootloader, follow these steps:

Clone this repository:

git clone https://github.com/crux161/hey-bios.git
cd hey-bios

Compile the bootloader:
nasm -f bin bootloader.s -o loader.bin

or run:
./build.sh

Prepare the disk image for qemu:
	qemu-img create boot.img 2M
fdisk ./boot.img  # you need to make a new primary partition and write that to the disk image before exiting.
fdisk -l boot.img # this should show a primary partition having been created, a necessary step to proceed.
dd if=./loader.bin of=./boot.img conv=notrunc

Run the bootloader:
qemu-system-x86_64 -drive format=raw,file=boot.img

If successful, you should see "Hello world!" printed to the screen.

License

This project is licensed under the MIT License. See LICENSE file for details.