Release 1.7.1

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.

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

The apps are framework-dependent. Install the .NET 10 Runtime from https://dotnet.microsoft.com/download/dotnet/10.0 first; the bundles do not include it. See the release page for SHA256SUMS.txt.

Highlights

• CHD images use CHDSharp read-ahead directly. The extra host-sector prefetcher could hold the CHD reader lock while the emulation thread waited, causing multi-frame rendering stalls and audio underruns during the first seconds of a game.
• Prefetch no longer outranks emulation. The remaining sector worker runs at below-normal priority and yields between read-ahead sectors.
• Dependencies. Avalonia 12.1.6, System.CommandLine 3.0.0, and Microsoft.NET.Test.Sdk 18.11.1.

Validation

• Full suite 2,125/2,125 passes in Debug.
• Build and dotnet format --verify-no-changes are clean; InspectCode reports 0 results.
• A 20-second desktop Road Rash run reports 0 audio underruns and no skipped frames.
• Six framework-dependent bundles are published from the v1.7.1 tag.

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.
• Signing and notarization require a Windows certificate and an Apple developer account.