PDC_STABLE
rc = (*pdc)(PDC_STABLE, PDC_STABLE_WRITE,
(*pdc)(PDC_STABLE, PDC_STABLE_READ,
rc = (*pdc)(PDC_STABLE, PDC_STABLE_WRITE,
(*pdc)(PDC_STABLE, PDC_STABLE_READ,
err = (*pdc)(PDC_STABLE, PDC_STABLE_READ, 0, &sstor, sstorsiz);
err = (*pdc)(PDC_STABLE, PDC_STABLE_SIZE, pdcbuf, 0, 0);