HelenOS sources

ANAR_10_HD       1661 uspace/drv/nic/rtl8139/driver.c 		anar |= ANAR_10_HD;
ANAR_10_HD       1713 uspace/drv/nic/rtl8139/driver.c 	if (anar & ANAR_10_HD)
ANAR_10_HD        642 uspace/drv/nic/rtl8169/driver.c 		anar |= ANAR_10_HD;
HelenOS homepage, sources at GitHub