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5DO 1.8.0

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@github-actions github-actions released this 11 Nov 04:36
· 4 commits to master since this release
v1.8.0
2f0f32d

5DO 1.8.0

Released: 2026-11-11

5DO 1.8.0 is a presentation and toolchain update. It adds MMPX 2x and Catmull-Rom
bicubic filtering to every presenter, adds 5:4/16:9/16:10/21:9 aspect presets, and
moves the repository to .NET 11 and C# 15.

Presentation

MMPX 2x

MMPX is Morgan McGuire and Mara Gagiu's style-preserving 2x pixel-art magnification
filter. It predicts four destination pixels from each source pixel using the 3x3
neighbourhood and the two-pixel diamond points, preserving the source palette and
single-pixel features.

  • GPU rule pass in OpenGL/GLES, Direct3D 11, and Vulkan, followed by sharp-bilinear
    finishing.
  • CPU reference implementation (MmpxFilter) used by the software presenter.
  • Opt-in GPU parity tests compare the complete 2x expansion against the CPU oracle.
  • Reference luminance tie-break and triangle-tip rules are active for opaque VDL
    frames. A regression test covers the triangle-tip pattern.

Catmull-Rom bicubic

  • 4x4 texel sampling with a = -0.5, clamped to the source edges.
  • Single scale pass in OpenGL/GLES, Direct3D 11, and Vulkan; CPU implementation in
    FrameScaler.ScaleBicubic.
  • No intermediate target and no palette re-expansion.
  • Probe names: bicubic and catmull-rom.

Aspect presets

Settings > Video > Aspect now exposes Integer, FourThree, FiveFour,
SixteenNine, SixteenTen, TwentyOneNine, Stretch, and Custom. Fixed ratios
letterbox or pillarbox without changing the emulated resolution. IntegerScale
continues to apply to Integer and 4:3; the wider presets fit their requested target
directly.

Status bar

The renderer label now includes the resolved filter, for example OpenGL 4.6 · MMPX,
and refreshes when settings or per-game overrides change.

Toolchain

  • SDK pinned to 11.0.100 with rollForward: latestFeature.
  • All projects target net11.0; the CLI and frontend use C# 15.
  • Microsoft.Extensions DependencyInjection 11.0.0.
  • The .NET 11 SDK supplies the implicit Microsoft.NET.ILLink.Tasks 11.0.0
    reference; the explicit central version was removed because CPM rejects versions for
    SDK-implicit packages.
  • Meziantou.Analyzer 3.0.324.
  • Removed the obsolete .NET 10 ILCompiler pin; the .NET 11 SDK supplies ILCompiler
    11.0.0 for NativeAOT.

Fixes

  • global.json previously used 11.0.0, which is not a valid SDK version. The pin is
    now 11.0.100, and dotnet --info no longer reports the configuration as invalid.
  • MMPX luma was zeroed in the CPU and shader implementations, which disabled the
    reference triangle-tip and luminance tie-break rules. It now uses the reference
    r + g + b + 1 term for opaque frames.
  • OpenGL sampled the MMPX intermediate with nearest filtering while the sharp-bilinear
    finish expected linear filtering. It now matches Direct3D 11 and Vulkan.

Validation

  • Full suite 2,158/2,158 passes in Debug with .NET SDK 11.0.100.
  • dotnet build, dotnet format --verify-no-changes, and
    jb inspectcode --severity=WARNING are clean.
  • CI covers Windows, Linux, and macOS; trimmed and NativeAOT CLI/frontend smoke; and
    six framework-dependent release bundles.
  • Bundles contain README.md, LICENSE, THIRD-PARTY-NOTICES.md, whatsnew.md, and
    the release/legal docs, with no runtime, PDB, or XML files.
  • The opt-in Direct3D 11, Vulkan, and OpenGL parity tests compare MMPX and bicubic
    output with the CPU oracle.

Requirements

  • The .NET 11 Runtime installed on the host. The bundles are framework-dependent and
    do not include the runtime.
  • A legally obtained 1 MB 3DO BIOS ROM.
  • Legally obtained 3DO disc images in ISO, BIN, CUE+BIN, or CHD format.

Download

System Bundle
Windows x64 5do-1.8.0-win-x64.zip
Windows arm64 5do-1.8.0-win-arm64.zip
Linux x64 5do-1.8.0-linux-x64.tar.gz
Linux arm64 5do-1.8.0-linux-arm64.tar.gz
macOS x64 5do-1.8.0-osx-x64.dmg
macOS arm64 5do-1.8.0-osx-arm64.dmg

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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