MIIRegAddr
iowrite8(MII_BMSR, ioaddr + MIIRegAddr);
rhine_wait_bit_high(rp, MIIRegAddr, 0x20);
iowrite8(MII_BMSR | 0x40, ioaddr + MIIRegAddr);
iowrite8(0x01, ioaddr + MIIRegAddr); // MII_BMSR
rhine_wait_bit_high(rp, MIIRegAddr, 0x20);
rhine_wait_bit_high(rp, MIIRegAddr, 0x80);
iowrite8(regnum, ioaddr + MIIRegAddr);
iowrite8(regnum, ioaddr + MIIRegAddr);