HelenOS sources

ANAR_100T4        393 uspace/drv/nic/rtl8139/defs.h 	ANAR_100T4        = (1 << 9),
ANAR_100T4        251 uspace/drv/nic/rtl8169/defs.h 	ANAR_100T4 = (1 << 9), /**< T4, not supported by the device */
HelenOS homepage, sources at GitHub