Inkbox decides to program without an OS. Back in the day, we used to do this by programming directly to the system or to BIOS with interrupts for things like disk, device, and display access.

Fast forward, and if you want to do this today, one doesn’t talk to BIOS – they need to program via UEFI services. Inkbox walks us through doing multi-core bare metal programming of the old game Zaxxon. It’s excellent work and fun walkthrough.