Moderator, I have a wire-cut EDM machining program that runs under DOS. There is a card on the parallel port. Originally it came with a floppy disk for DOS 3.30. Later, because that was inconvenient, I switched to a hard disk and DOS 6.22. Now I've found that the power-failure protection function is gone (that is, it can't restore the machining state from before the power outage), but its manual says the operating system is DOS 3.3 or above. Switching back to DOS 3.3 would solve it, but damn, DOS 3.3 doesn't recognize the hard disk. Does the moderator have a good solution?



