# Air-Sea Battle: an annotated Atari 2600 disassembly

> A labeled and commented 6502 assembly listing reconstructs Air-Sea Battle, Atari's 1977 game for the Atari 2600, on the MiniDig disassembly page. An assembler switch selects the NTSC or PAL build of the 2K ROM. Header notes cover the taller PAL kernel zones, why the NTSC version's EXPERT difficulty gives a missile size of 0, and the two RAM locations, $91 and $92, that the author marks as unused.

- 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/air_sea_battle.asm>
- Primary source: <https://web.archive.org/web/20260910210732/https://www.qotile.net/minidig/disassembly/air_sea_battle.asm>
- Catalog page: <https://awesomerea.org/resources/air-sea-battle-disassembly-case/>
- Record JSON: <https://awesomerea.org/resources/air-sea-battle-disassembly-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/air-sea-battle-disassembly-case/index.md)

## Requirements & limits

- **Prerequisites:** A 6502 assembler and the vcs.h header that the listing includes.
- **Scope:** COMPILE_VERSION selects the NTSC or PAL build of the 2K ROM.
- **License:** No licence stated on the project page.

## Primary sources

1. <https://web.archive.org/web/20260910210732/https://www.qotile.net/minidig/disassembly/air_sea_battle.asm>
2. <https://web.archive.org/web/20260714091141/https://www.qotile.net/minidig/>

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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.