{
  "added_at": "2026-11-09",
  "category": "reconstruction-cases",
  "class": "game",
  "description_en": "Ultima IV decompiled reconstructs the PC game's AVATAR.EXE and TITLE.EXE as C and assembly source. The author reports that compiling and linking the recovered files with Microsoft C Compiler 4.00 produces executables about ten bytes different from each original.",
  "description_zh": "Ultima IV decompiled 将 PC 版游戏的 AVATAR.EXE 和 TITLE.EXE 重建为 C 与汇编源码。作者报告，使用 Microsoft C Compiler 4.00 编译链接后，每个新可执行文件与原版约相差十字节。",
  "entry_url": "https://awesomerea.org/resources/ultima-iv-decompiled-case/",
  "entry_url_zh": "https://awesomerea.org/zh/resources/ultima-iv-decompiled-case/",
  "evidence_class": 2,
  "evidence_status": "observed",
  "evidence_url": "https://github.com/ergonomy-joe/u4-decompiled/blob/2185af4414ddc13ebb0fb9ab84526b28f9158a81/README.md",
  "group": "cases",
  "id": "ultima-iv-decompiled-case",
  "json_url": "https://awesomerea.org/resources/ultima-iv-decompiled-case/record.json",
  "kind": "case-study",
  "markdown_url": "https://awesomerea.org/resources/ultima-iv-decompiled-case/index.md",
  "markdown_url_zh": "https://awesomerea.org/zh/resources/ultima-iv-decompiled-case/index.md",
  "name": "Ultima IV: near-matching reconstruction of its DOS executables",
  "name_zh": "Ultima IV：接近原版的 DOS 可执行文件重建",
  "reconstruction_method": "matching-decompilation",
  "record_type": "resource",
  "relationship": "independent-reconstruction",
  "requirement_facets": [
    "prerequisites",
    "testing",
    "limits",
    "license"
  ],
  "requirements": [
    "Rebuilding uses Microsoft C Compiler 4.00.",
    "The author reports roughly ten bytes of difference per rebuilt executable.",
    "Only CGA.DRV was reversed among the separate graphics drivers.",
    "No licence file in the repository."
  ],
  "requirements_zh": [
    "重建使用 Microsoft C Compiler 4.00。",
    "作者报告每个重建的可执行文件与原版约相差十字节。",
    "独立图形驱动中仅 CGA.DRV 得到逆向重建。",
    "仓库中没有许可证文件。"
  ],
  "scope": "unknown",
  "targets": [
    "binary",
    "game"
  ],
  "url": "https://github.com/ergonomy-joe/u4-decompiled",
  "verification": "source-reviewed",
  "verified_at": "2026-11-06"
}