device: 0.825 graphic: 0.725 other: 0.563 network: 0.527 files: 0.518 socket: 0.518 vnc: 0.502 performance: 0.376 semantic: 0.338 boot: 0.301 PID: 0.288 debug: 0.187 permissions: 0.155 KVM: 0.045 usb/ohci does not reset HccaPad1 after frame number update. Description of problem: When the OHCI controller's framenumber is incremented, HccaPad1 register should be set to zero. Ref OHCI Spec 4.4.1. Relevant code section: https://gitlab.com/qemu-project/qemu/-/blob/master/hw/usb/hcd-ohci.c#L1201 ReactOS uses hccaPad1 to determine if the OHCI hardware is running, consequently it fails this check in current qemu master.