taglinefilesource code
olddor705drivers/block/floppy.cregister unsigned char drive, unit, newdor,olddor;
olddor710drivers/block/floppy.colddor = FDCS->dor;
olddor711drivers/block/floppy.cnewdor =  (olddor & mask) | data;
olddor712drivers/block/floppy.cif ( newdor != olddor ){
olddor713drivers/block/floppy.cunit = olddor & 0x3;
olddor714drivers/block/floppy.cif(is_selected(olddor, unit) && !is_selected(newdor,unit)){
olddor727drivers/block/floppy.cif(!is_selected(olddor, unit) && is_selected(newdor,unit)){
olddor734drivers/block/floppy.cif( olddor & 0xf0 )
olddor736drivers/block/floppy.creturn olddor;