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

(detailed timestamps in comments)
#livecoding #operatingsystem #coding
welcome: https://offlinemark.com/welcome
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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