HelenOS sources

RHDB_DR_SHIFT      91 uspace/drv/bus/usb/ohci/ohci_rh.c 	    (port_desc >> RHDB_DR_SHIFT) & 0xff;
RHDB_DR_SHIFT      96 uspace/drv/bus/usb/ohci/ohci_rh.c 		    ((port_desc >> RHDB_DR_SHIFT) >> 8) & 0xff;
HelenOS homepage, sources at GitHub