building an OS (all streams)

Currently Playing: building my own OS in c++ (week 135, x86_64 LAPIC timer)

tldr: I want to hear your systems programming challenges. DM me =) [contact below] #livecoding #operatingsystem #coding hey everyone - I’m trying to learn how I can be more helpful to this community beyond just streams. I’d like to talk to some people about their challenges in the world of systems programming, whether they're technical, career, or anything else. If you’re interested, just DM me. thank you 🙏 contact: Discord (mm64k) Instagram (offlinemark) Email (mark @ offlinemark.com) -- 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 00:04:44 - Chat discussion on what a programming language needs to support OS development, comparing C and Rust 00:08:08 - Introducing the templated MMIO wrapper utility class for clean hardware register access in drivers 00:10:36 - LAPIC driver architecture redesign using a factory function and MMIO wrapper pattern 00:35:49 - AI consultation reveals only 4 register writes are needed for a minimal LAPIC timer interrupt 00:43:34 - Identifying LAPIC register offsets (SVR, timer, divisor, initial count) from the Intel manual 01:09:24 - Writing LAPIC initialization code using the MMIO wrapper to enable the APIC and configure the timer 01:44:05 - Setting up the IDT entry and interrupt handler stub for the LAPIC timer IRQ 01:52:57 - First successful timer interrupt fires in the OS kernel