# Berzerk: a commented Atari 2600 disassembly

> Berzerk for the Atari 2600 (Atari, 1982) is reconstructed as a labeled, commented 6502 assembly listing that assembles to the exact original ROM image, with a switch for the NTSC or PAL build. The notes cover the game's sprite-drawing technique, PAL frame-delay values set at 1.2 times the NTSC ones, unused diagonal robot-fire values left in the ROM, unused RAM and the roughly 12-second launch of Evil Otto.

- Type: Case study
- Targets: Game
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-09
- Added to the catalog: 2026-11-10
- Original resource: <https://www.qotile.net/minidig/disassembly/berzerk.asm>
- Primary source: <https://web.archive.org/web/20260501205549/https://www.qotile.net/minidig/disassembly/berzerk.asm>
- Catalog page: <https://awesomerea.org/resources/berzerk-atari-2600-disassembly-case/>
- Record JSON: <https://awesomerea.org/resources/berzerk-atari-2600-disassembly-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/berzerk-atari-2600-disassembly-case/index.md)

## Requirements & limits

- **Prerequisites:** Assembling requires vcs.h version 105 or greater and macro.h.
- **Limits:** The author notes that some flags and RAM overlays may be misidentified.
- **License:** No licence stated on the project page.

## Primary sources

1. <https://web.archive.org/web/20260501205549/https://www.qotile.net/minidig/disassembly/berzerk.asm>

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.