HelenOS sources

ANAR_10_HD       1631 uspace/drv/nic/rtl8139/driver.c 		anar |= ANAR_10_HD;
ANAR_10_HD       1683 uspace/drv/nic/rtl8139/driver.c 	if (anar & ANAR_10_HD)
ANAR_10_HD        620 uspace/drv/nic/rtl8169/driver.c 		anar |= ANAR_10_HD;
HelenOS homepage, sources at GitHub