- TargetFrameworks net48;net40. net48 keeps x64 + ViGEm + System.IO.Ports package; net40 adds Microsoft.Bcl.Async + System.ValueTuple and uses the in-box SerialPort. - Compat/TaskCompat bridges Task.Run/Delay/WhenAny/WhenAll (TaskEx on net40) and SemaphoreSlim.WaitAsync (net40 blocks briefly - trivial at 9600 baud). - IReadOnlyList/IReadOnlyDictionary -> IList/IDictionary throughout (net40 predates the IReadOnly* interfaces and the Bcl backport cannot make arrays implement them). - HashCode.Combine replaced with a manual combine (Bcl.HashCode has no net40 build); Marshal.SizeOf<T> -> typeof form; ViGEmJoystickSink gated #if !NET40. HidFeederJoystickSink stays on both flavors - it will drive RioGamepadXP.sys on XP via the same contract. Both TFMs build; 275 tests green on net48. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
RIOJoy
Modern Windows 10/11 interface between the cockpit RIO (Remote Input/Output) board and Windows, as a virtual joystick / keyboard / mouse — the successor to the legacy vJoy-based app, with no vJoy dependency.
The RIO has 72 digital inputs and outputs (lighted buttons) and 5 analog axes (joystick X/Y, throttle, left pedal, right pedal), connected over RS-232 at 9600 8N1. RIOJoy exposes these to games that don't natively know about the cockpit hardware, with per-game profiles. (The native games — Firestorm, Red Planet — talk to the RIO directly and do not use this app.)
Repository layout
| Path | Contents |
|---|---|
src/RioJoy.Core |
Protocol, profile model, input mapper, HID feeder (class library) |
src/RioJoy.Tray |
Background tray application |
tests/RioJoy.Core.Tests |
xUnit tests for the protocol core |
driver/ |
RioGamepad virtual HID driver (KMDF + VHF) — replaces vJoy |
tools/RioJoySmokeTest |
On-cabinet end-to-end check of the feeder → driver path |
tools/XcfRegionExtract |
Extracts cockpit label regions from riojoy.xcf → regions.json |
docs/PLAN.md |
Full modernization plan (7 phases) |
docs/PROTOCOL.md |
RIO wire format + iRIO input-map reference |
docs/reference/ |
Cockpit overlay art & the legacy labeling pipeline |
legacy/ |
Original C++/vJoy implementation, kept as reference |
Building
Requires the .NET SDK (8.0 or newer) plus the .NET Framework 4.8
targeting/developer pack, on Windows. The apps target .NET Framework 4.8,
which is in-box on every Windows 10/11 machine — so deployed builds are
framework-dependent and need no runtime install on the target. The driver
builds separately with the WDK (see driver/README.md).
dotnet build RioJoy.sln -c Release
dotnet test RioJoy.sln
Status
Phases 1–5 are implemented and tested (241 unit tests). The RioGamepad virtual
HID driver is built (KMDF + VHF), test-signed, installed, and verified: it
enumerates in joy.cpl, and the C# HID feeder (DeviceIoControl →
RioGamepad.sys) drives its axes, buttons, and hat end-to-end (see
tools/RioJoySmokeTest). The C# side covers the serial
- RIO protocol core, input mapping + output routing, axis calibration + plasma
display, the tray app + profiles (JSON config,
RIO.iniimporter, three-state auto-switch), and the HID report packer that matches the driver's wire format. Remaining work is on-cabinet (real RIO serial/axis/plasma/auto-switch verification) plus packaging (Phase 6) and the profile editor + overlay generator (Phase 7). Seedocs/PLAN.mdfor the full roadmap.