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5DO 1.7.1

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@github-actions github-actions released this 10 Nov 20:53
· 12 commits to master since this release
v1.7.1
bf2294a

5DO 1.7.1

Released: 2026-11-10

5DO 1.7.1 is a desktop playback and dependency update. It removes the startup
stutter and audio underruns caused by the host disc prefetcher shadowing CHDSharp's
own read-ahead, and refreshes the Avalonia, CLI, and test dependencies.

Highlights

  • Smooth startup on CHD images. CHD sources now use CHDSharp's built-in hunk
    read-ahead directly instead of being wrapped in a second sector prefetcher. The
    previous look-ahead could hold the CHD reader lock while the emulation thread waited,
    producing multi-frame rendering stalls and audio underruns during the first seconds of
    a game.
  • Background prefetch no longer competes with emulation. The remaining sector
    prefetcher for uncompressed images runs at below-normal priority and yields between
    read-ahead sectors.
  • Dependency refresh. Avalonia 12.1.6, System.CommandLine 3.0.0, and
    Microsoft.NET.Test.Sdk 18.11.1 are used by the fresh bundles.

Validation

  • Full suite 2,125/2,125 passes in Debug.
  • dotnet build reports 0 warnings and 0 errors; dotnet format --verify-no-changes and jb inspectcode --severity=WARNING are clean.
  • A 20-second desktop Road Rash run reports 0 audio underruns and no skipped frames.
  • Lemmings and Space Ace desktop runs are clean in repeated 20-second checks.
  • All six bundles contain the CLI, desktop app, README, license, notices, whatsnew.md,
    and release/legal docs, with no runtime, PDB, or XML files.

Requirements

  • The .NET 10 Runtime installed on the host. The bundles are framework-dependent and
    do not include the runtime. Choose the x64 or arm64 bundle that matches your OS.
  • A legally obtained 1 MB 3DO BIOS ROM (for example panafz1.bin).
  • Legally obtained 3DO disc images in ISO, BIN, CUE+BIN, or CHD format.
  • Optional: network access for the online cover catalog. Local covers and the core
    emulator work offline.

Download

System Bundle
Windows x64 5do-1.7.1-win-x64.zip
Windows arm64 5do-1.7.1-win-arm64.zip
Linux x64 5do-1.7.1-linux-x64.tar.gz
Linux arm64 5do-1.7.1-linux-arm64.tar.gz
macOS x64 5do-1.7.1-osx-x64.dmg
macOS arm64 5do-1.7.1-osx-arm64.dmg

Each bundle contains the framework-dependent single-file CLI and desktop app, README.md,
LICENSE, THIRD-PARTY-NOTICES.md, whatsnew.md, and the release/legal docs. See the
release page for
SHA256SUMS.txt.

Known limits

  • Playability follows the documented binary beyond-title rule, not a full playthrough.
  • CD command cadence remains the residual differential on the 50-title panel.
  • Windows x64 remains the validated GPU target; Linux GPU presentation under
    llvmpipe/SSH is preview/best-effort.
  • Physical macOS gamepad detection still needs a macOS host with a connected controller.
  • Signing and notarization require a Windows certificate and an Apple developer account.
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