building an OS (all streams)

Currently Playing: building my own operating system in c++ (week 106, inline asm/interrupts)

(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 00:02:32 Converting codebase from AT&T to Intel assembly syntax 00:07:00 Debugging Intel syntax compilation errors with inline assembly 00:32:00 Code organization and build system cleanup 00:38:00 Review of current interrupt handling progress and IDT setup 00:48:00 Adding general protection fault exception handler 01:10:48 Testing GP fault handling with null selector loading 01:35:00 Implementing syscall handler infrastructure for software interrupts 01:49:00 Debugging syscall trap return and stack frame issues 02:05:24 Stream conclusion and recap of interrupt handling progress