DSKDRV1           520 drivers/block/ataflop.c 	sound_ym.wd_data = (tmp | DSKDRVNONE) & ~(drive == 0 ? DSKDRV0 : DSKDRV1);
DSKDRV1           615 drivers/block/ataflop.c 			               ~(drive == 0 ? DSKDRV0 : DSKDRV1);