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    Let’s build an OS!

    Apr 19, 2021 3 minutes

    In an old Reddit thread someone once asked, “If you were locked in a room with a PC with no OS, could you write one from scratch?” Among all the joke replies, someone actually answered that question – Kragen Javier Sitaker, who worked for Canonical (the company that publishes Ubuntu) at the time.

    Sitaker’s approach took a number of steps to implement the base functionality that’s needed to get an OS up and running, though this hinges on there being a functioning IBM PC-compatible BIOS. He then piggybacked off the bootloader to implement his base

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