{
  "added_at": "2026-11-09",
  "category": "reconstruction-cases",
  "class": "game",
  "description_en": "u5d reconstructs C source for Ultima V: Warriors of Destiny and compares it with the MS-DOS v1.16 program at the assembly-semantic level. The author reports that the modern version can be played through to the ending using original game data. The author reports approximately 95% matching for ULTIMA.EXE, excluding assembly functions, and approximately 95% for the overlays.",
  "description_zh": "u5d 重建《Ultima V: Warriors of Destiny》的 C 源码，并与 MS-DOS v1.16 版进行汇编语义层面的比较。作者称，使用原版游戏数据的现代版本可以玩到结局；ULTIMA.EXE 的匹配率约为 95%（不计汇编函数），覆盖模块的匹配率也约为 95%。",
  "entry_url": "https://awesomerea.org/resources/u5d-ultima-v-case/",
  "entry_url_zh": "https://awesomerea.org/zh/resources/u5d-ultima-v-case/",
  "evidence_class": 2,
  "evidence_status": "observed",
  "evidence_url": "https://github.com/wonst719/u5d/blob/6c7085e56fe9f033ac950c90901ca7927a4184e5/README.md",
  "group": "cases",
  "id": "u5d-ultima-v-case",
  "json_url": "https://awesomerea.org/resources/u5d-ultima-v-case/record.json",
  "kind": "case-study",
  "markdown_url": "https://awesomerea.org/resources/u5d-ultima-v-case/index.md",
  "markdown_url_zh": "https://awesomerea.org/zh/resources/u5d-ultima-v-case/index.md",
  "name": "u5d: a semantic-match Ultima V decompilation",
  "name_zh": "u5d：按汇编语义匹配的《Ultima V》反编译",
  "reconstruction_method": "decompilation",
  "record_type": "resource",
  "relationship": "independent-reconstruction",
  "requirement_facets": [
    "prerequisites",
    "prerequisites",
    "limits",
    "license"
  ],
  "requirements": [
    "Original Ultima V data files are required to play.",
    "Windows builds use Visual Studio 2026. The DOS target uses DJGPP; the Microsoft C 5.1 target is used for disassembly matching and cannot currently link an executable.",
    "The original linker is unavailable, so a byte-identical binary match is not currently possible; bugs may remain.",
    "No licence file in the repository."
  ],
  "requirements_zh": [
    "游玩需要原版 Ultima V 数据文件。",
    "Windows 构建使用 Visual Studio 2026。DOS 目标使用 DJGPP；Microsoft C 5.1 目标用于反汇编匹配，目前无法链接可执行文件。",
    "原版链接器尚未找到，因此目前无法实现二进制文件逐字节匹配；游戏仍可能存在错误。",
    "仓库中没有许可证文件。"
  ],
  "scope": "unknown",
  "targets": [
    "game"
  ],
  "url": "https://github.com/wonst719/u5d",
  "verification": "source-reviewed",
  "verified_at": "2026-11-06"
}