The XP flavor of our own virtual joystick (no third-party driver), built
with WDK 7.1.0 to x86/subsystem-5.01. Exposes the identical Public.h
contract as the modern KMDF+VHF driver — same GUID, IOCTL_RIO_SUBMIT_REPORT,
25-byte report, VID/PID — so HidFeederJoystickSink drives both.
Design (driver/RioGamepadXP/rioxp.c):
- WDM HID minidriver via HidRegisterMinidriver presenting the 6-axis/hat/
96-button joystick. POLLED mode (DevicesArePolled=TRUE): hidclass paces
IOCTL_HID_READ_REPORT and we complete each synchronously from a cached
report — no pending-IRP or cancel-routine machinery (the usual crash
surface in a virtual HID driver).
- Named sideband control device (\Device\RioGamepadXP + \DosDevices symlink)
takes IOCTL_RIO_SUBMIT_REPORT and updates the cache under a spinlock.
- hidclass overwrites our CREATE/CLOSE/DEVICE_CONTROL during registration;
we save its pointers and reinstall wrappers that route the control device's
IRPs to us and forward the HID FDO's to hidclass.
Packaging/install:
- Root-enumerated, so install uses devcon (built from the same WDK) —
InstallHinfSection can't create the devnode. install-core.bat runs
"devcon install RioGamepadXP.inf root\RioGamepadXP"; unsigned is fine
(XP x86 enforces no kernel signing). Bundled into vendor\xp\.
- net40 feeder opens the driver by name (\.\RioGamepadXP); XP can't put a
device interface on a bare control device (no PDO) — the one nuance.
Static build only: compiles clean but runtime bring-up (joy.cpl enumeration,
report flow) needs a real XP target — that's 8E. 275 tests still green.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
CydandClaude Fable 5
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