building an OS (all streams)

Currently Playing: building my own operating system in c++ (week 97, page tables)

(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 00:01:08 Discussion of virtual memory support and unit testing goals 00:08:51 Beginning work on the VirtAddr class implementation 00:41:30 Discovering and fixing AI-generated math errors in test data 01:21:11 Extracting interfaces for frame allocator dependency injection 01:28:38 Creating mock implementations for unit testing environment 01:47:38 Testing VAddressSpace class with mock dependencies 02:08:34 Debugging mock allocator functionality in action 02:15:08 Project status update and current capabilities discussion 02:22:12 Stream wrap-up and community resources sharing