PCS_IRQ_ENABLED
sockp->pcs_flags |= PCS_IRQ_ENABLED;
sockp->pcs_flags &= ~PCS_IRQ_ENABLED;
sockp->pcs_flags &= ~(PCS_CARD_IO|PCS_IRQ_ENABLED);
irq_enabled = (sockp->pcs_flags & PCS_IRQ_ENABLED) ?
sockp->ls_flags |= PCS_IRQ_ENABLED;
sockp->ls_flags &= ~PCS_IRQ_ENABLED;
sockp->ls_flags, PCS_IRQ_ENABLED);
!(sockp->ls_flags & PCS_IRQ_ENABLED))