building an OS (all streams)

Currently Playing: building my own operating system in c++ (week 101, 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 00:01:09 Discussing potential changes to unit test heavy approach 00:04:02 Plans to test virtual memory implementation within the kernel 00:08:58 Switching from unit tests to direct kernel testing approach 00:12:27 Setting up basic memory mapping and addressing kernel crash concerns 00:21:33 Creating map_range function to map memory ranges 00:38:30 Loading CR3 register to switch to new page tables 01:07:08 Debugging kernel crash using QEMU debugger and info commands 01:32:01 Discovering stack mapping issue with chat help 01:47:36 Successfully running kernel with own page tables for first time