building my own operating system in c++ (week 93, page tables)

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

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
00:10:16 Reviewing roadmap and discussing virtual memory implementation plans
00:18:21 Understanding bootloader reclaimable memory and migration requirements
00:30:48 Planning page table migration strategy and discussing approaches
00:47:45 Beginning code implementation for virtual address space abstraction
01:06:05 Creating physical to virtual memory address conversion utilities
01:28:44 Implementing virtual address space class with frame allocation
01:53:25 Testing implementation and debugging null pointer crashes
02:01:11 Prototyping the virtual memory mapping function interface
02:08:15 Stream conclusion and announcement of upcoming travel break