IOASIC_DMA_ADDR
IOASIC_DMA_ADDR(phys));
IOASIC_DMA_ADDR(nphys));
IOASIC_DMA_ADDR(phys));
IOASIC_DMA_ADDR(nphys));
IOASIC_ISDN_X_NEXTPTR, IOASIC_DMA_ADDR(nphys));
IOASIC_ISDN_R_NEXTPTR, IOASIC_DMA_ADDR(nphys));
tca = IOASIC_DMA_ADDR(sc->sc_dmamap->dm_segs[0].ds_addr);