TUL_Mask
outb(0x1F, host->addr + TUL_Mask);
outb(0x0F, host->addr + TUL_Mask);
outb(0x1F, host->addr + TUL_Mask);
outb(0x0F, host->addr + TUL_Mask);
outb(0x1F, host->addr + TUL_Mask);
outb(0x1F, host->addr + TUL_Mask);
outb(0x0F, host->addr + TUL_Mask);