# Ralf Brown's Interrupt List

5 Hacker News commenters recommended Ralf Brown's Interrupt List and 0 criticized it, November 2025 to November 2026. It was recommended in 2 of 13 months.

**Verdict:** Free reference documenting PC interrupt calls, valued by low-level programmers for boot loaders, tests and libraries.

## Why people recommend it

- Core reference for PC architecture (2 comments): "one of the most useful documentation sets for the PC architecture" ([source](https://news.ycombinator.com/item?id=45794257)) "this was a priceless find for an aspiring low-level programmer" ([source](https://news.ycombinator.com/item?id=45794501))
- Helps with low-level and boot code (2 comments): "This was invaluable when I was tasked with writing a stay-resident boot loader just after the turn of the century." ([source](https://news.ycombinator.com/item?id=45794400)) "this was a priceless find for an aspiring low-level programmer" ([source](https://news.ycombinator.com/item?id=45794501))

## Alternatives hackers recommend

- [Stack Overflow](https://hackerapproved.com/p/stack-overflow.md): 235 recommend
- [MDN Web Docs](https://hackerapproved.com/p/mdn-web-docs.md): 27 recommend
- [HTTP Cats](https://hackerapproved.com/p/http-cats.md): 20 recommend
- [Unicode symbol reference page](https://hackerapproved.com/p/one-clean-developer-focused-page-for-every-unicode-symbol.md): 8 recommend
- [Can I Use](https://hackerapproved.com/p/can-i-use.md): 5 recommend

## Cite as

Hacker Approved, "Ralf Brown's Interrupt List", https://hackerapproved.com/p/ralf-brown-s-interrupt-list/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).