FDXC_CHECKCHG
(void) fdexec(fdc, FDXC_SLEEP | FDXC_CHECKCHG);
if (fdrecalseek(fdc, unit, cyl, FDXC_CHECKCHG)) {
if ((cmdresult = fdexec(fdc, FDXC_SLEEP | FDXC_CHECKCHG)) == 0) {
bp->b_error = fdexec(fdc, FDXC_SLEEP|FDXC_CHECKCHG);
if ((flags & FDXC_CHECKCHG) && fdsense_chng(fdc, unit)) {
if (fdexec(fdc, FDXC_SLEEP | FDXC_CHECKCHG) != 0) {