Case study

UAD-2 OCTO: tracing PCIe command rings and DSP resource loading

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.

Targets: Binary · Firmware · Protocol
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06
Evidence class: C2 code & docs, no demo or download

Stars: 2
Last commit: 2026-08-05
Language: C
License (GitHub): GPL-2.0

GitHub data as of 2026-11-10

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Evidence

Observed: Code, documentation and a demo observed; no download method found.
Checked: 2026-11-08

How evidence classes are assigned

Requirements & limits

Prerequisites: Experiments target a UAD-2 OCTO Rev 5 card with an isolated IOMMU group and the documented PCIe profile.
Prerequisites: The hardware procedures involve low-level PCIe, MMIO, DMA, interrupt and reset access.
Limits: General-purpose DSP execution has not been achieved.
License: GPL-2.0-only licence.

Cite

BibTeX

@misc{uad2-octo-pcie-case,
  title = {{UAD-2 OCTO: tracing PCIe command rings and DSP resource loading}},
  howpublished = {\url{https://github.com/ahmadexp/UAD2-OCTO-RE}},
  url = {https://github.com/ahmadexp/UAD2-OCTO-RE},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/uad2-octo-pcie-case/}}
}

Plain text

UAD-2 OCTO: tracing PCIe command rings and DSP resource loading. https://github.com/ahmadexp/UAD2-OCTO-RE (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/uad2-octo-pcie-case/

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About this entry

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Primary sources

README.md GitHub · ahmadexp/UAD2-OCTO-RE · Revision f4da3ab
docs/architecture.md GitHub · ahmadexp/UAD2-OCTO-RE · Revision f4da3ab
docs/bill-resource-analysis.md GitHub · ahmadexp/UAD2-OCTO-RE · Revision f4da3ab