VIA_CRDR_SDSTATUS2
status = readw(addrbase + VIA_CRDR_SDSTATUS2);
writew(status, addrbase + VIA_CRDR_SDSTATUS2);
status = readw(addrbase + VIA_CRDR_SDSTATUS2);
writew(status, addrbase + VIA_CRDR_SDSTATUS2);