FD_DRSEL
fcp->c_digout = (fcp->c_digout & ~FD_DRSEL) | (unit & FD_DRSEL);
fcp->c_digout |= FD_DRSEL;
fcp->c_digout = (fcp->c_digout & (FD_DMTREN | FD_DRSEL)) | FD_ENABLE;
fcp->c_digout = (fcp->c_digout & (FD_DMTREN | FD_DRSEL)) | FD_ENABLE;
if (retcode && (fcp->c_digout & FD_DRSEL) == fcp->c_curunit) {
deselect = fcp->c_digout ^ FD_DRSEL;
if (retcode && (fcp->c_digout & FD_DRSEL) == fcp->c_curunit) {
deselect = fcp->c_digout ^ FD_DRSEL;
fcp->c_digout = (fcp->c_digout & ~FD_DRSEL) |
(~unit & FD_DRSEL);