sbdmadscr
struct sbdmadscr *dsc;
struct sbdmadscr *dsc;
struct sbdmadscr *sbdma_dscrtable;
struct sbdmadscr *sbdma_dscrtable_end;
struct sbdmadscr *sbdma_addptr; /* next dscr for sw to add */
struct sbdmadscr *sbdma_remptr; /* next dscr for sw
d->sbdma_dscrtable = (struct sbdmadscr *)
struct sbdmadscr *dsc;
struct sbdmadscr *nextdsc;
struct sbdmadscr *dsc;
struct sbdmadscr *nextdsc;