ASC_INTEN_THE
u32 intenable = asc_in(port, ASC_INTEN) & ~ASC_INTEN_THE;
u32 intenable = asc_in(port, ASC_INTEN) | ASC_INTEN_THE;
(asc_in(port, ASC_INTEN) & ASC_INTEN_THE)) {