HelenOS sources

DP_MAR4           326 uspace/drv/nic/ne2k/dp8390.c 	pio_write_8(ne2k->port + DP_MAR4, 0);
DP_MAR4           664 uspace/drv/nic/ne2k/dp8390.c 	pio_write_8(ne2k->port + DP_MAR4, (uint8_t) (hash >> 32));