thejayman77
ec82764bef
RTL (GS rasterizer, EE core stub, platform bridge, LPDDR4B path), sim regression (272 TBs), docs, and tooling. Copyrighted PS2 content (BIOS, game code, GS dumps, and all dump-derived textures/traces) is excluded via .gitignore and stays local. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
59 lines
2.4 KiB
Markdown
59 lines
2.4 KiB
Markdown
# third_party Licensing and Provenance Policy
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This file sets the policy for externally-derived material before any of it is
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vendored into the `retroDE_ps2` repository. It is deliberately written early
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so that provenance discipline is in place from the start rather than
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retrofitted.
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## Principles
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1. No material is vendored into this repository without a recorded source,
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license, and adaptation note.
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2. Sony confidential documentation (see "Sensitive sources" below) is
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referenced and studied but is **not distributed** from this repository.
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3. Open-source material brought in must carry its original license and
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attribution, and that license must be compatible with the eventual
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retroDE_ps2 distribution terms.
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4. BIOS ROM images are **never** committed. Users supply their own dumps.
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## Sensitive sources (reference-only, not to be vendored)
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The following documents are useful technical references but are Sony
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confidential-origin leaks. They inform our contracts but must not be copied
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into this repository:
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- GS User's Manual v6.0 (Sony Computer Entertainment Inc.)
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- VU User's Manual / Emotion Engine Vector Operation Unit Guide (Sony)
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Treat these as reference-only. Cite them in contract docs when appropriate,
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but do not include excerpts beyond what is defensible under normal
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engineering-analysis fair-use practice.
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## BIOS and firmware
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- Real PS2 BIOS images are copyrighted by Sony and are not distributed here.
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- The repository may include checksums, region-identifying metadata, loading
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scaffolding, and test harnesses that expect a user-supplied dump to be
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placed in a known local location.
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- If an HLE BIOS stub strategy is adopted in any phase (see BIOS policy
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decision), the HLE code is original to this project and must be written
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from clean-room hardware references, not derived from commercial firmware.
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## Imported open-source material
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If code from `PCSX2`, `Play!`, `DobieStation`, `ps2dev/ps2sdk`, `gsKit`,
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`PSX_MiSTer`, or other open-source projects is ever adapted into this
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repository, it must be placed under `third_party/<project>/` with:
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- the original upstream URL,
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- the original license file,
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- the upstream commit or version identifier captured at import time,
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- a `NOTES.md` describing local modifications.
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License compatibility must be confirmed before the import lands on `main`.
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## Status
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No external material has been vendored as of 2026-04-16. This file defines
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the policy that applies when that changes.
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