mvs_getstatus
while (((st = mvs_getstatus(dev, 0)) & (s | c)) != s) {
status = mvs_getstatus(dev, 0);
status = mvs_getstatus(dev, 1);
if ((status = mvs_getstatus(dev, 1)) & ATA_S_BUSY) {
if ((status = mvs_getstatus(dev, 1)) & ATA_S_BUSY)