How do you define an OS? You can write an EFI "OS" that prints "Hello, world" in... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

LiamPowell on Sept 10, 2025 | parent | context | favorite | on: Hypervisor in 1k Lines

How do you define an OS? You can write an EFI "OS" that prints "Hello, world" in approximately 5 lines.

spongebobism on Sept 10, 2025 | [–]

It's a bit more than that.

> We'll implement basic context switching, paging, user mode, a command-line shell, a disk device driver, and file read/write operations in C.

see https://1000os.seiya.me/en/

dark-star on Sept 10, 2025 | [–]

that's not an OS, that's an EFI application

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact