{
  "added_at": "2026-11-08",
  "additional_evidence_urls": [
    "https://github.com/dennishilk/cisco9951-doom/blob/f9c49115e1409d2c99de2c88f5c5c81db06cb1b8/README.md"
  ],
  "category": "reconstruction-cases",
  "class": "game",
  "description_en": "Cisco CP-9951 DOOM ports the game to run on the IP phone's ARM CPU using its local framebuffer, keypad, and media path. The accompanying investigation maps the Raven keypad path and a 16-byte input event format from the phone's keyhandle module and hardware observations.",
  "description_zh": "Cisco CP-9951 DOOM 将游戏移植到 IP 电话的 ARM 处理器，使用本地帧缓冲、键盘和媒体通路。配套研究通过检查 keyhandle 模块和实际设备，梳理 Raven 键盘输入路径及 16 字节事件格式。",
  "entry_url": "https://awesomerea.org/resources/cisco-9951-doom-case/",
  "entry_url_zh": "https://awesomerea.org/zh/resources/cisco-9951-doom-case/",
  "evidence_class": 1,
  "evidence_status": "observed",
  "evidence_url": "https://github.com/dennishilk/cisco9951-doom/blob/f9c49115e1409d2c99de2c88f5c5c81db06cb1b8/docs/keypad-reverse-engineering.md",
  "group": "cases",
  "id": "cisco-9951-doom-case",
  "json_url": "https://awesomerea.org/resources/cisco-9951-doom-case/record.json",
  "kind": "case-study",
  "markdown_url": "https://awesomerea.org/resources/cisco-9951-doom-case/index.md",
  "markdown_url_zh": "https://awesomerea.org/zh/resources/cisco-9951-doom-case/index.md",
  "name": "Cisco CP-9951 DOOM: mapping phone input for a native game port",
  "name_zh": "Cisco CP-9951 DOOM：解析电话输入并移植原生游戏",
  "preview_kind": "image",
  "preview_url": "https://awesomerea.org/previews/cisco-9951-doom-case.webp",
  "record_type": "resource",
  "relationship": "independent-reconstruction",
  "requirement_facets": [
    "prerequisites",
    "testing",
    "license"
  ],
  "requirements": [
    "A Cisco CP-9951 with firmware sip9951.9-2-1 is the documented tested device.",
    "The author reports an Ethernet-disconnected cold-boot test of the final build.",
    "No licence file in the repository."
  ],
  "requirements_zh": [
    "文档中的测试设备为运行 sip9951.9-2-1 固件的 Cisco CP-9951。",
    "作者报告最终构建通过了断开以太网后的冷启动测试。",
    "仓库中没有许可证文件。"
  ],
  "scope": "partial",
  "targets": [
    "firmware"
  ],
  "url": "https://github.com/dennishilk/cisco9951-doom",
  "verification": "source-reviewed",
  "verified_at": "2026-11-06"
}