March, 2025

Writing an OS Kernel from Scratch – Part 34: PCIe Basics and Driver Framework — The Highway of Modern Hardware “The e1000 driver got us online, but modern NICs have long upgraded to PCIe! Today, we dive into the PCIe world, implementing configuration space access, MSI interrupts, and device enumeration!” In the previous post, we... » read more

Writing an OS Kernel from Scratch – Part 8: fork and exec — Let Processes “Reproduce”! “A single process running alone? That’s not an OS, that’s a single-player game. Today, we give processes the ability to ‘reproduce’ — duplicating themselves via fork, and transforming into new programs via exec!” In the previous post, we successfully... » read more

Writing an OS Kernel from Scratch – Part 27: Application Launcher — Building Your Desktop Environment Prototype “A graphical interface can’t just have windows — it needs an entry point! Today, we implement an Application Launcher, managing applications via .desktop files and launching them with a click!” In the previous post, we successfully moved the... » read more