Case study

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.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-09

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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.

Cite

BibTeX

@misc{air-sea-battle-disassembly-case,
  title = {{Air-Sea Battle: an annotated Atari 2600 disassembly}},
  howpublished = {\url{https://www.qotile.net/minidig/disassembly/air_sea_battle.asm}},
  url = {https://www.qotile.net/minidig/disassembly/air_sea_battle.asm},
  urldate = {2026-11-09},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/air-sea-battle-disassembly-case/}}
}

Plain text

Air-Sea Battle: an annotated Atari 2600 disassembly. https://www.qotile.net/minidig/disassembly/air_sea_battle.asm (accessed 2026-11-09). Awesome REA entry: https://awesomerea.org/resources/air-sea-battle-disassembly-case/

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About this entry

The description was reviewed against primary sources.

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