Barebones x86 Operating System
Vince Swu
Overview
NasmOS is a simple demonstration of a barebones x86 operating system. It consists of a minimal bootloader and a basic kernel that displays a message, showcasing the foundational steps in OS development.
Prerequisites
NASM: For assembling the bootloader and kernel assembly code.Open Watcom: Used to compile the kernel's C code. Watcom allows for low-level C programming suitable for OS development, making it easier to work with hardware and memory directly.QEMU: A virtual machine emulator that allows you to test your OS without needing real hardware.Installing Prerequisites
Open Watcom: Download here
NASM:
QEMU:
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Posted Aug 9, 2026
Built a barebones x86 operating system with a custom bootloader and kernel using NASM and C, with QEMU-based development and testing.
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