I would like to add, copy any possibly hidden programs o8000 to o8990 and especially any tool change programs in o9000 and above. You may have to change a parameter to see, edit or punch them. Like Dan Fritz said changing this macro B option warns you that all will be gone in memory.
You really don't want to be asking "Does any one have a machine like mine, I lost my tool change programs in o9001, o9002 ,o9003,ect."