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FHFlorent Herissonchronosdev.hashnode.devJan 11 · 6 min read

The Care and Feeding of Interrupt Handlers

The Care and Feeding of Interrupt Handlers Dear diary, Today I decided to give my embryonic operating system a voice. Not literally—that would be terrifying—but an interactive shell so it could at least complain about its existence in real time. What...

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FHFlorent Herissonchronosdev.hashnode.devJan 10 · 7 min read

Page Tables: A Love Story (It's Not)

Dear diary, today I discovered that leaving the comfortable embrace of UEFI is like moving out of your parents' house at 40. Everything that used to work magically now requires you to actually understand how the world functions. It was 9am when I sat...

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FHFlorent Herissonchronosdev.hashnode.devJan 9 · 7 min read

From Power-On to 'Oh No'

From Power-On to 'Oh No' Dear Diary: MinGW, M1, and the Sweet Taste of Actually Working Code January 2, 2026 - ChronOS Development Log Dear diary, today I discovered that building an operating system kernel is like trying to assemble IKEA furniture w...

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FHFlorent Herissonchronosdev.hashnode.devJan 9 · 7 min read

IRQs and the Art of Not Crashing

IRQs and the Art of Not Crashing Dear diary, today I committed to building an operating system again. No, I'm not okay. It's January 2nd, 2026, and while normal people are nursing hangovers and pretending they'll actually go to the gym this year, I'm...

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FHFlorent Herissonchronosdev.hashnode.devJan 9 · 7 min read

IRQs and the Art of Not Crashing

IRQs and the Art of Not Crashing Dear diary, today I committed to building an operating system again. No, I'm not okay. It's January 2nd, 2026, and while normal people are nursing hangovers and pretending they'll actually go to the gym this year, I'm...

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MGMeet Gandhicontributing-to-ubuntu.hashnode.devNov 10, 2025 · 4 min read

Contributing to Ubuntu — Day 2.5: When I had to pause my journey ⏸️

Hello people! I know you would want to hit me hard in the face for not writing a blog for a week (I know I am not that important but I can always pretend so 😁) but I will be as honest I can in this one. What happened to my excitement? My excitement...

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SAShuja Ahmadhex0.hashnode.devAug 28, 2025 · 7 min read

How to Write Your First Bootloader from Scratch (No OS Needed)

So it all started one day when this crazy thought struck my mind: "Can someone write their own operating system from scratch?" I thought to myself that even if it was possible, it must be really hard and time-consuming. I booted up my desktop running...

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ABAbdoo Benariabdooowd.hashnode.devMay 18, 2024 · 12 min read

AbdooOS - Episode 2: The Boot Sector

What is a "Boot Sector"? Remember what we said last time? That we should start from a boot sector to get into our beautiful OS' "real" part? I think I didn't say that... So, our OS is composed of two main things: Boot: A part of the OS which puts th...

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Fflysand7flysand7.hashnode.devNov 22, 2023 · 7 min read

Writing an OS kernel in Odin

Setting up to writing an OS kernel is always somewhat tough comparing to writing user-space applications, mostly because the compilers and standard libraries make a few assumptions about the execution environment that aren't necessary true in the spa...

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#osdev

Explore Hashnode

The Care and Feeding of Interrupt Handlers

Page Tables: A Love Story (It's Not)

From Power-On to 'Oh No'

IRQs and the Art of Not Crashing

IRQs and the Art of Not Crashing

Contributing to Ubuntu — Day 2.5: When I had to pause my journey ⏸️

How to Write Your First Bootloader from Scratch (No OS Needed)

AbdooOS - Episode 2: The Boot Sector

Writing an OS kernel in Odin

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