ISRPRI_TTY
(void) isrlink(zshard, zsc, 4, ISRPRI_TTY);
dsc->sc_ih = dio_intr_establish(comintr, sc, da->da_ipl, ISRPRI_TTY);
frodo_intr_establish(parent, comintr, sc, fa->fa_line, ISRPRI_TTY);
(void)dio_intr_establish(dcmintr, sc, da->da_ipl, ISRPRI_TTY);
frodo_intr_establish(parent, dnkbd_intr, sc, fa->fa_line, ISRPRI_TTY);
intr_establish(hil_intr, sc, ia->ia_ipl, ISRPRI_TTY);