{
  "added_at": "2026-11-06",
  "additional_evidence_urls": [
    "https://github.com/ubis/OSIRIS/blob/8515cd884c55f71f1bda35e0efc1586563dfaf6a/README.md"
  ],
  "category": "reconstruction-cases",
  "description_en": "OSIRIS replaces the DSP-board software of Onkyo TX-NR515 and TX-NR717 receivers with its own boot loader, Linux services and DSP code. The project documents the SPI exchange between the main MCU and DSP board, including 1032-byte transfers, frame structure and command meanings recovered from stock firmware and logs.",
  "description_zh": "OSIRIS 以自制引导程序、Linux 服务和 DSP 代码替换 Onkyo TX-NR515、TX-NR717 功放的 DSP 板软件。项目依据原厂固件和日志整理主 MCU 与 DSP 板之间的 SPI 通信，记录 1032 字节传输、帧格式及命令含义。",
  "entry_url": "https://awesomerea.org/resources/osiris-onkyo-receiver-case/",
  "entry_url_zh": "https://awesomerea.org/zh/resources/osiris-onkyo-receiver-case/",
  "evidence_url": "https://github.com/ubis/OSIRIS/blob/8515cd884c55f71f1bda35e0efc1586563dfaf6a/docs/mcu-protocol.md",
  "group": "cases",
  "id": "osiris-onkyo-receiver-case",
  "json_url": "https://awesomerea.org/resources/osiris-onkyo-receiver-case/record.json",
  "kind": "case-study",
  "markdown_url": "https://awesomerea.org/resources/osiris-onkyo-receiver-case/index.md",
  "markdown_url_zh": "https://awesomerea.org/zh/resources/osiris-onkyo-receiver-case/index.md",
  "name": "OSIRIS: replacing Onkyo receiver firmware through MCU protocol research",
  "name_zh": "OSIRIS：基于 MCU 协议研究替换 Onkyo 功放固件",
  "record_type": "resource",
  "relationship": "independent-reconstruction",
  "requirement_facets": [
    "prerequisites",
    "limits",
    "license"
  ],
  "requirements": [
    "An Onkyo receiver with a D830 or OMAP-L137 DSP board; installation requires a DSP-board serial connection and BOOT-pin switching.",
    "The README reports TX-NR717 working and TX-NR515 working with incomplete testing; DTS, Spotify, internet radio and DLNA are unfinished.",
    "Original OSIRIS code is BSD-2-Clause; bundled upstream components retain the licenses stated in the README."
  ],
  "requirements_zh": [
    "需要配有 D830 或 OMAP-L137 DSP 板的 Onkyo 功放；安装需要连接 DSP 板串口并切换 BOOT 引脚。",
    "作者报告 TX-NR717 可运行，TX-NR515 可运行但尚未完成全部测试；DTS、Spotify、网络电台和 DLNA 尚未实现。",
    "OSIRIS 原创代码采用 BSD-2-Clause；随附上游组件沿用 README 列出的各自许可证。"
  ],
  "targets": [
    "firmware",
    "protocol"
  ],
  "url": "https://github.com/ubis/OSIRIS",
  "verification": "source-reviewed",
  "verified_at": "2026-11-06"
}