HelenOS sources

ICR_RXT0          263 uspace/drv/nic/e1k/e1k.c 		.value = ICR_RXT0,
ICR_RXT0         1220 uspace/drv/nic/e1k/e1k.c 	E1000_REG_WRITE(e1000, E1000_IMS, ICR_RXT0);
ICR_RXT0         1244 uspace/drv/nic/e1k/e1k.c 	if (icr & ICR_RXT0)
HelenOS homepage, sources at GitHub