HelenOS sources

ISR_RDC           385 uspace/drv/nic/ne2k/dp8390.c 		if ((pio_read_8(ne2k->port + DP_ISR) & ISR_RDC) != 0)
ISR_RDC           390 uspace/drv/nic/ne2k/dp8390.c 	pio_write_8(ne2k->port + DP_ISR, val & ~ISR_RDC);
ISR_RDC            87 uspace/drv/nic/ne2k/ne2k.c 		    ISR_CNT | ISR_RDC),