DT2815_STATUS
if (inb(dev->iobase + DT2815_STATUS) == 0xff) {
outb(0x00, dev->iobase + DT2815_STATUS);
status = inb(dev->iobase + DT2815_STATUS);
outb(0x00, dev->iobase + DT2815_STATUS);
status = inb(dev->iobase + DT2815_STATUS);