HelenOS sources

CTRL_ASDE         414 uspace/drv/nic/e1k/e1k.c 	ctrl &= ~(CTRL_ASDE);
CTRL_ASDE         456 uspace/drv/nic/e1k/e1k.c 	ctrl |= CTRL_ASDE;
CTRL_ASDE         484 uspace/drv/nic/e1k/e1k.c 	ctrl &= ~(CTRL_ASDE);
CTRL_ASDE        1550 uspace/drv/nic/e1k/e1k.c 	E1000_REG_WRITE(e1000, E1000_CTRL, CTRL_ASDE);
HelenOS homepage, sources at GitHub