STD_REQ_OUT 223 uspace/lib/usbvirt/src/stdreq.c STD_REQ_OUT(USB_REQUEST_RECIPIENT_DEVICE, USB_DEVREQ_SET_ADDRESS), STD_REQ_OUT 233 uspace/lib/usbvirt/src/stdreq.c STD_REQ_OUT(USB_REQUEST_RECIPIENT_DEVICE, USB_DEVREQ_SET_CONFIGURATION),HelenOS homepage, sources at GitHub