{
  "added_at": "2026-11-10",
  "category": "reconstruction-cases",
  "class": "game",
  "description_en": "Activision's 1982 Atari VCS game Pitfall! is disassembled into labeled and commented 6502 assembly (version 0.9). Notes explain how a reversible LFSR generates the 255 jungle scenes, which bits of the random number select ground objects, scene type, tree pattern and wall position, and how the nine-stripe display kernel draws Harry, the liana, holes, ladder and wall; assembler switches add optional optimizations, screensaver code and a training mode.",
  "description_zh": "Activision 1982 年的 Atari VCS 游戏 Pitfall! 被反汇编为带标签和注释的 6502 汇编（v0.9）。注释解释了可逆 LFSR 如何生成 255 个丛林场景、随机数各比特如何决定地面物体、场景类型、树木图案和墙的位置，以及九段式显示内核如何绘制 Harry、藤蔓、坑洞、梯子和墙；汇编开关可启用可选优化、屏保代码和练习模式。",
  "entry_url": "https://awesomerea.org/resources/pitfall-atari-vcs-disassembly-case/",
  "entry_url_zh": "https://awesomerea.org/zh/resources/pitfall-atari-vcs-disassembly-case/",
  "evidence_url": "https://web.archive.org/web/20260213080644/https://www.qotile.net/minidig/disassembly/pitfall.asm",
  "group": "cases",
  "id": "pitfall-atari-vcs-disassembly-case",
  "json_url": "https://awesomerea.org/resources/pitfall-atari-vcs-disassembly-case/record.json",
  "kind": "case-study",
  "markdown_url": "https://awesomerea.org/resources/pitfall-atari-vcs-disassembly-case/index.md",
  "markdown_url_zh": "https://awesomerea.org/zh/resources/pitfall-atari-vcs-disassembly-case/index.md",
  "name": "Pitfall!: an annotated Atari VCS disassembly of scene generation and the kernel",
  "name_zh": "Pitfall!：Atari VCS 版注释反汇编，解析场景生成与显示内核",
  "reconstruction_method": "decompilation",
  "record_type": "resource",
  "relationship": "independent-reconstruction",
  "requirement_facets": [
    "prerequisites",
    "limits",
    "license"
  ],
  "requirements": [
    "Assembling needs a 6502 assembler and the vcs.h Atari VCS header that the listing includes.",
    "Version 0.9 of the analysis, last updated in October 2001.",
    "No licence stated on the project page."
  ],
  "requirements_zh": [
    "汇编需要 6502 汇编器以及代码引用的 Atari VCS 头文件 vcs.h。",
    "分析版本为 v0.9，最后更新于 2001 年 10 月。",
    "项目页面未声明许可证。"
  ],
  "targets": [
    "game"
  ],
  "url": "https://www.qotile.net/minidig/disassembly/pitfall.asm",
  "verification": "source-reviewed",
  "verified_at": "2026-11-09"
}