ICTL_FIFO
outb(ICTL_FIFO | ICTL_REQ | FIFO_COUNT, fd->base + REG_ICTL);
outb(ICTL_FIFO | ICTL_SEL | ICTL_REQ | FIFO_COUNT,
outb(ICTL_FIFO | ICTL_REQ | FIFO_COUNT,