DSKDRVNONE        520 drivers/block/ataflop.c 	sound_ym.wd_data = (tmp | DSKDRVNONE) & ~(drive == 0 ? DSKDRV0 : DSKDRV1);
DSKDRVNONE        614 drivers/block/ataflop.c 		sound_ym.wd_data = (old_porta | DSKDRVNONE) &