MACCtrl1
outw(RxEnable | TxEnable, BASE + MACCtrl1);
(int) inw(BASE + MACCtrl1), (int) inw(BASE + MACCtrl0)));
outw(TxDisable, BASE + MACCtrl1);
outw(TxEnable, BASE + MACCtrl1);
outw(TxDisable, BASE + MACCtrl1);
outw(TxDisable | RxDisable | StatsDisable, BASE + MACCtrl1);