HelenOS sources

DP_MAR6           328 uspace/drv/nic/ne2k/dp8390.c 	pio_write_8(ne2k->port + DP_MAR6, 0);
DP_MAR6           666 uspace/drv/nic/ne2k/dp8390.c 	pio_write_8(ne2k->port + DP_MAR6, (uint8_t) (hash >> 48));