{
  "added_at": "2026-11-10",
  "category": "reconstruction-cases",
  "class": "game",
  "description_en": "Activision's 1982 Atari VCS game River Raid is disassembled into labeled and commented 6502 assembly (version 0.9). Notes explain how random river sections of 16 blocks ending in a bridge are generated, how one fuel tank, enemy or house is placed per block, how a two-line kernel repeated twelve times draws each 32-line block with hardware-only collision checks, and how the score lives directly in the display pointers; switches add screensaver code and a training mode.",
  "description_zh": "Activision 1982 年的 Atari VCS 游戏 River Raid 被反汇编为带标签和注释的 6502 汇编（v0.9）。注释说明了由 16 个块组成、以桥梁收尾的河段如何随机生成，每个块如何放置一个油箱、敌人或房屋，重复十二次的双行显示内核如何绘制每个 32 条扫描线高的块并只用硬件碰撞寄存器检测碰撞，以及分数如何直接存放在显示指针中；汇编开关可加入屏保代码和练习模式。",
  "entry_url": "https://awesomerea.org/resources/river-raid-atari-vcs-disassembly-case/",
  "entry_url_zh": "https://awesomerea.org/zh/resources/river-raid-atari-vcs-disassembly-case/",
  "evidence_class": 3,
  "evidence_status": "observed",
  "evidence_url": "https://web.archive.org/web/20260223204810/https://www.qotile.net/minidig/disassembly/RiverRaid.asm",
  "group": "cases",
  "id": "river-raid-atari-vcs-disassembly-case",
  "json_url": "https://awesomerea.org/resources/river-raid-atari-vcs-disassembly-case/record.json",
  "kind": "case-study",
  "markdown_url": "https://awesomerea.org/resources/river-raid-atari-vcs-disassembly-case/index.md",
  "markdown_url_zh": "https://awesomerea.org/zh/resources/river-raid-atari-vcs-disassembly-case/index.md",
  "name": "River Raid: an annotated Atari VCS disassembly of river generation and the kernel",
  "name_zh": "River Raid：Atari VCS 版注释反汇编，解析河道生成与显示内核",
  "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 August 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 8 月。",
    "项目页面未声明许可证。"
  ],
  "scope": "notes",
  "targets": [
    "game"
  ],
  "url": "https://www.qotile.net/minidig/disassembly/RiverRaid.asm",
  "verification": "source-reviewed",
  "verified_at": "2026-11-09"
}