I did not get any disks with it. :-(
Yes, it's just a DOS.
I tried holding ESC, DEL, F10 buttons without change.
I obviously don't care about the clock itself -- I just want to use my damn machine.
I don't think we can use it without booting up, can we? I mean, I know I can move the bed, but don't know how to move Z or if the spindle would fire up with the side button (on the console).