building an OS (all streams)

Currently Playing: building my own operating system in c++ (week 99, virtual memory)

(detailed timestamps in comments) #livecoding #operatingsystem #coding welcome: https://offlinemark.com/welcome discord: https://discord.gg/P6zQBsD2ng 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. 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, and starting my on own OS. If this resonates with you, please subscribe and I'll see you in a stream :) 00:00:00 Start 00:03:41 Recap of virtual memory implementation and page table mapping 00:08:24 Debugging unit test crashes caused by large stack allocation 00:25:43 Implementing comprehensive page table unit tests with mock memory allocator 00:45:33 Discussion on C++ learning approaches and AI-assisted code generation 01:00:05 Implementing query function to look up page table entries 01:38:02 Refactoring page table walk into reusable helper functions 02:05:15 Creating comprehensive edge case tests for all code branches 02:23:40 Finding and fixing bugs discovered through unit testing 02:30:45 Planning for week 100 milestone and CCC conference attendance