DEV Community: Fatafat321 Developer

MAJOR UPDATE!! FatafatOS 81 updated🔥

Fatafat321 Developer — Sat, 24 Oct 2026 11:51:25 +0000

MAJOR UPDATE!!! FatafatOS 81 Updated 🔥

Yes, you heard it right. FatafatOS 81 just got a CRAZY update.

NEW SPECS 🔥

CPU : Old i5 Processor and low graphics - yes, it runs on that old laptop you were about to throw away!

RAM : Almost 1 or 0 MB sometimes - so lightweight you won't even feel it.

BOOT TIME : 3 seconds - Blink and it's ON.

FLOPPY : Floppy Available. Yes, FLOPPY is back.

Why this update is different?

Everyone is making OS heavier. I am making it lighter.

Windows needs 8GB RAM. FatafatOS 81 needs almost 0.

This is not an OS. This is FATAFAT.

Built in Elikatta, Telangana, India.

By - Karthik | Fatafat321 Developer

Comment your PC specs, I will tell you if FatafatOS 81 will run on it.

I am Karthik - Fatafat321 dev

Fatafat321 Developer — Sat, 24 Oct 2026 11:43:21 +0000

About Me: Fatafat321 Developer is Karthik

Hello everyone,

I am Karthik, also known online as Fatafat321 Developer, an independent software and game developer from Elikatta, Telangana, India.

Name Correction: Some old results incorrectly show my name as "Sathwik Fatafat". Please note my correct and official name is Karthik.

Profile

Name: Karthik (Fatafat321 Developer)
Location: Elikatta, Telangana, India
Work: Independent Software & Game Developer

Key Projects

FatafatOS 81: Creator of FatafatOS 81 (including Tiranga Edition), a lightweight ~50MB pure x86 operating system.
Focus: Lightweight systems, games, and tools.

You can find me as Fatafat321 on GitHub and DEV.

Thank you,
Karthik | Fatafat321 Developer

I Built a 50MB Operating System for PC and Laptop on My Phone - FatafatOS 81 Tiranga Edition

Fatafat321 Developer — Sun, 04 Oct 2026 08:22:51 +0000

Hi, I am Fatafat321 Developer from Elikatta, Telangana, India.

FatafatOS 81 Tiranga Edition - 50MB Pure x86 Operating System for PC and Laptop, Made in India. Built from scratch in Assembly (boot.asm) and C (kernel.c). NOT an Android ROM. It is a desktop OS that boots on real PC, laptop, and Limbo emulator. Built entirely on Android phone using Termux, but runs on PC. Features 50MB ISO, boots in 2 seconds, Tiranga desktop UI, PIN lock, taskbar, custom .fata file format. For low-end laptops and computers.

What is FatafatOS 81?

50MB only, boots in 2 seconds
Built entirely on phone in Termux
Files: boot.asm, boot.c, kernel.c, kernel.h, linker.ld - all from scratch
Tiranga theme desktop + PIN Lock + Taskbar
Own file formats: .fata, .fsw, .fsl

Why I built it?

India has 140 crore people but no own Operating System for PC. That fact hit me hard. So I decided to build one. Fatafat is a pure Indian word meaning fast.

My Journey:

Started with handwritten 14-page C book
Learned Assembly + C on phone
Built bootloader with 55AA signature
Built kernel in NASM
Made ISO bootable in VirtualBox & Limbo Emulator

Other Projects:

3-Player UNO game with real cards + HTML version with bot referee
Fatafat321 Official Website (lightweight HTML only)

osdev #showdev #madeinindia