building an OS (all streams)

Currently Playing: building my own operating system in c++ (week 85, delete JOS)

(detailed timestamps in comments) #livecoding #operatingsystem #coding welcome: https://offlinemark.com/welcome discord: https://discord.gg/XsgpqpVxNu Welcome! I’m an aspiring systems programmer. Professionally, I used to work in infosec, but now I work on music production software & hardware. I stream OS/kernel development every week for 2 hours. (I’ve done this for over 75 weeks in a row! Sundays 10a-12 ET) From February 2024 to May 2025, I streamed myself doing all the labs for MIT’s old Operating Systems Engineering course (6.828 (2018)). Through doing this, I became very familiar with JOS, which is the x86 OS used for the course. This is the OS which I work with in all of my streams. I had almost no experience with OS development when I started, although I did have much experience with programming and low level concepts. I did the coursework because I wanted to write my own OS, but felt I wasn’t ready. Now, from May 2025 to present, I’m pursuing my own learning agenda with OS development. Eventually I will start writing my own OS when the time is right! If this resonates with you, please subscribe and I'll see you in a stream :) 0:00 start 00:05:02 Recap of ETL containers work including linked lists and intrusive data structures 00:10:49 Beginning to delete JOS user space code and remove dependencies 00:21:19 Removing user space components including networking, file system, and build changes 00:35:30 Starting to remove kernel components and delete legacy makefiles 00:55:10 Continuing cleanup of unused kernel files and headers 01:16:05 Achieving minimal kernel state with most components removed 01:35:33 Creating new kmain.cpp file for a fresh C++ kernel start 01:48:16 Attempting Qemu E9 hack for serial output but falling back to console driver 01:57:30 Successfully getting first output from new minimal kernel and wrap-up