HelenOS sources

MAC0              234 uspace/drv/nic/rtl8139/driver.c 	*mac0_dest = pio_read_32(rtl8139->io_port + MAC0);
MAC0              235 uspace/drv/nic/rtl8139/driver.c 	*mac4_dest = pio_read_16(rtl8139->io_port + MAC0 + 4);
MAC0              252 uspace/drv/nic/rtl8139/driver.c 	pio_write_32(rtl8139->io_port + MAC0, *val1);
MAC0              253 uspace/drv/nic/rtl8139/driver.c 	pio_write_32(rtl8139->io_port + MAC0 + 4, *val2);
MAC0             1157 uspace/drv/nic/rtl8169/driver.c 		addr->address[i] = pio_read_8(rtl8169->regs + MAC0 + i);
MAC0             1168 uspace/drv/nic/rtl8169/driver.c 		pio_write_8(rtl8169->regs + MAC0 + i, addr->address[i]);
HelenOS homepage, sources at GitHub