{
  "added_at": "2026-11-08",
  "additional_evidence_urls": [
    "https://github.com/ahmadexp/UAD2-OCTO-RE/blob/f4da3ab8ff74ded71af7d7ad35ba7dccbac781ed/docs/architecture.md",
    "https://github.com/ahmadexp/UAD2-OCTO-RE/blob/f4da3ab8ff74ded71af7d7ad35ba7dccbac781ed/docs/bill-resource-analysis.md"
  ],
  "category": "reconstruction-cases",
  "class": "hardware",
  "description_en": "UAD-2 OCTO-RE investigates the PCIe host transport of a Universal Audio DSP card through driver analysis and experiments on one Rev 5 board. The author reports reproducing command-ring and DMA startup across eight DSPs and recovering parts of the firmware and Bill resource containers. General-purpose DSP execution remains blocked by an unresolved runtime response and opaque payload format.",
  "description_zh": "UAD-2 OCTO-RE 通过驱动分析和一块 Rev 5 卡上的实验研究 Universal Audio DSP 卡的 PCIe 主机传输。作者报告已在八个 DSP 上复现命令环和 DMA 启动，并还原部分固件及 Bill 资源容器结构；通用 DSP 程序执行仍受运行时应答与载荷格式问题阻碍。",
  "entry_url": "https://awesomerea.org/resources/uad2-octo-pcie-case/",
  "entry_url_zh": "https://awesomerea.org/zh/resources/uad2-octo-pcie-case/",
  "evidence_class": 2,
  "evidence_status": "observed",
  "evidence_url": "https://github.com/ahmadexp/UAD2-OCTO-RE/blob/f4da3ab8ff74ded71af7d7ad35ba7dccbac781ed/README.md",
  "group": "cases",
  "id": "uad2-octo-pcie-case",
  "json_url": "https://awesomerea.org/resources/uad2-octo-pcie-case/record.json",
  "kind": "case-study",
  "markdown_url": "https://awesomerea.org/resources/uad2-octo-pcie-case/index.md",
  "markdown_url_zh": "https://awesomerea.org/zh/resources/uad2-octo-pcie-case/index.md",
  "name": "UAD-2 OCTO: tracing PCIe command rings and DSP resource loading",
  "name_zh": "UAD-2 OCTO：追踪 PCIe 命令环与 DSP 资源加载",
  "record_type": "resource",
  "relationship": "independent-reconstruction",
  "requirement_facets": [
    "prerequisites",
    "prerequisites",
    "limits",
    "license"
  ],
  "requirements": [
    "Experiments target a UAD-2 OCTO Rev 5 card with an isolated IOMMU group and the documented PCIe profile.",
    "The hardware procedures involve low-level PCIe, MMIO, DMA, interrupt and reset access.",
    "General-purpose DSP execution has not been achieved.",
    "GPL-2.0-only licence."
  ],
  "requirements_zh": [
    "实验针对具备独立 IOMMU 组、符合文档中 PCIe 特征的 UAD-2 OCTO Rev 5 卡。",
    "硬件实验涉及底层 PCIe、MMIO、DMA、中断和复位操作。",
    "尚未实现通用 DSP 程序执行。",
    "GPL-2.0-only 许可证。"
  ],
  "scope": "unknown",
  "targets": [
    "binary",
    "firmware",
    "protocol"
  ],
  "url": "https://github.com/ahmadexp/UAD2-OCTO-RE",
  "verification": "source-reviewed",
  "verified_at": "2026-11-06"
}