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GeezerVison is showing github.com — release: prepare 0.3.0-alpha.3 · iStark/PS5PCEM@77356db

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‎README.md‎

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<p><strong>Experimental PlayStation 5 emulation and interoperability research in Zig</strong></p>
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<p>Native guest execution · RDNA2 shader translation · Vulkan rendering · Windows launcher</p>
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<p>
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<a href="https://github.com/iStark/PS5PCEM/releases/tag/v0.3.0-alpha.2"><img src="https://img.shields.io/github/v/release/iStark/PS5PCEM?include_prereleases&style=flat-square&color=3b95ff" alt="Latest release"></a>
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<a href="https://github.com/iStark/PS5PCEM/releases/tag/v0.3.0-alpha.3"><img src="https://img.shields.io/github/v/release/iStark/PS5PCEM?include_prereleases&style=flat-square&color=3b95ff" alt="Latest release"></a>
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<img src="https://img.shields.io/badge/platform-Windows%20x64-3b95ff?style=flat-square" alt="Windows x64">
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<img src="https://img.shields.io/badge/Zig-0.16-f7a41d?style=flat-square" alt="Zig 0.16">
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<a href="LICENSE"><img src="https://img.shields.io/badge/license-GPL--3.0--or--later-6f7782?style=flat-square" alt="GPL-3.0-or-later"></a>
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<img src="https://img.shields.io/badge/status-early%20prototype-e6a23c?style=flat-square" alt="Early prototype">
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</p>
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<p>
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<a href="https://github.com/iStark/PS5PCEM/releases/tag/v0.3.0-alpha.2"><strong>Download prototype</strong></a>
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<a href="https://github.com/iStark/PS5PCEM/releases/tag/v0.3.0-alpha.3"><strong>Download prototype</strong></a>
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· <a href="docs/README.md">Documentation</a>
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· <a href="docs/project-status.md">Compatibility status</a>
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· <a href="https://github.com/iStark/PS5PCEM/issues">Report an issue</a>
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## Download
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The current Windows x64 prototype is **0.3.0-alpha.2**:
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The current Windows x64 prototype is **0.3.0-alpha.3**:
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- [Portable ZIP](https://github.com/iStark/PS5PCEM/releases/download/v0.3.0-alpha.2/PS5PCEM-0.3.0-alpha.2-windows-x64-portable.zip)
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- [Per-user installer](https://github.com/iStark/PS5PCEM/releases/download/v0.3.0-alpha.2/PS5PCEM-0.3.0-alpha.2-windows-x64-setup.exe)
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- [SHA-256 checksums](https://github.com/iStark/PS5PCEM/releases/download/v0.3.0-alpha.2/SHA256SUMS.txt)
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- [Release notes](docs/release-notes/v0.3.0-alpha.2.md)
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- [Portable ZIP](https://github.com/iStark/PS5PCEM/releases/download/v0.3.0-alpha.3/PS5PCEM-0.3.0-alpha.3-windows-x64-portable.zip)
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- [Per-user installer](https://github.com/iStark/PS5PCEM/releases/download/v0.3.0-alpha.3/PS5PCEM-0.3.0-alpha.3-windows-x64-setup.exe)
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- [SHA-256 checksums](https://github.com/iStark/PS5PCEM/releases/download/v0.3.0-alpha.3/SHA256SUMS.txt)
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- [Release notes](docs/release-notes/v0.3.0-alpha.3.md)
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The prototype requires Windows 10 2004 or newer, x86-64, and a current Vulkan
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1.2-capable graphics driver. The binaries are currently unsigned, so Windows
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| [Project status and compatibility](docs/project-status.md) | Screenshots, measured title milestones, and current limits |
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| [Implementation status](docs/implementation-status.md) | What the emulator can do, subsystem by subsystem |
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| [Architecture](docs/README.md#architecture) | RDNA2, GPU, Vulkan, memory, loader, HLE, CPU, diagnostics, and runtime internals |
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| [Release notes](docs/release-notes/v0.3.0-alpha.2.md) | Changes in the latest packaged prototype |
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| [Release notes](docs/release-notes/v0.3.0-alpha.3.md) | Changes in the latest packaged prototype |
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| [License and legal note](docs/legal.md) | GPL obligations, bundled dependencies, and project scope |
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Architecture reference:
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‎VERSION‎

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0.3.0-alpha.2
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0.3.0-alpha.3
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‎build.zig.zon‎

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// Copyright (C) 2026 Artur Strazewicz
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.{
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.name = .rdna2,
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.version = "0.3.0-alpha.2",
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.version = "0.3.0-alpha.3",
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.fingerprint = 0x70cc9aa6f444796,
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.minimum_zig_version = "0.16.0",
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.dependencies = .{
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‎docs/README.md‎

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| [Building and command-line usage](getting-started.md) | Build PS5PCEM, run its tools, package Windows releases, or integrate the RDNA2 module |
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| [Project status and compatibility](project-status.md) | See the development captures and the measured milestone reached in each observed title |
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| [Implementation status](implementation-status.md) | Read what the emulator can do, subsystem by subsystem |
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| [Latest release notes](release-notes/v0.3.0-alpha.2.md) | See the changes and requirements for the current prototype |
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| [Latest release notes](release-notes/v0.3.0-alpha.3.md) | See the changes and requirements for the current prototype |
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| [License and legal note](legal.md) | Understand GPL obligations, dependency licensing, and project scope |
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## Architecture
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‎docs/release-notes/v0.3.0-alpha.3.md‎

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# PS5PCEM 0.3.0-alpha.3
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This prototype update adds video decoding for titles that use
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`libSceVideodec2`, which is what lets Ghost of Yōtei reach and play its intro.
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## Added
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- Decode the H.264 access units a title hands to `libSceVideodec2`. The host
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decoder receives the stream, the picture is converted from NV12 with BT.709
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coefficients, and decoding is paced to about one picture per display interval
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so a title feeding access units as fast as they are accepted no longer drains
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a whole movie in a few frames.
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- Ghost of Yōtei decodes and presents its intro video with sound. Its
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in-engine frame behind the video is still black, so this is a video-playback
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milestone rather than a menu or gameplay claim.
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- Recover the completion generation for an SDK 11 compute queue from the
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caller when the queue object is spilled rather than left in a register, which
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releases a render thread that would otherwise spin.
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## Fixed
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- Report a decoded picture where a title reads it. The record was laid out from
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the wrong end, so a title checked a size field for readiness and never saw the
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frames it had been given.
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- Report a frame-slot size a title can divide its arena by. A slot as large as
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the whole arena left room for none and ended decoder setup before a single
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frame was decoded.
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- Stop presenting an unconverted frame as a black one: a frame whose packed
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format could not be converted was handed back as freshly zeroed bytes, which
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was indistinguishable from a frame the title rendered black.
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- Stop the launcher clipping its own name. The brand cells were too small in
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both directions, so the title lost the bottom of every glyph and the subtitle
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ended mid-word.
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- Never hand out an asynchronous read identifier that is still in use. A title
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that streams keeps batches open across many submissions, and the table wrapped
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onto live entries during ordinary loading.
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- Stop the quiet-thread diagnostic faulting on a wrong guess. It followed two
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addresses out of a suspended thread without checking either, which ended the
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emulator a couple of frames into video playback.
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- Run command arenas a title strands behind a CPU-polled fence, rescuing each
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once per submission rather than replaying it in a loop.
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## Requirements and limitations
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- Windows 10 2004 or newer, x86-64, with a Vulkan 1.2-capable graphics driver.
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- Compatibility remains experimental; black screens, missing graphics, stalls
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and crashes are still possible in unsupported titles.
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- Games, firmware, keys and console system software are not included.
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- These prototype binaries are not Authenticode-signed, so Windows may show an
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Unknown Publisher or Microsoft Defender SmartScreen warning.

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