selmasongs

Hi! Recently I got tiny minidisc recorder MZ-N510. I successfully hacked it, to add some new options to menu e.t.c. After some time I revert it to default settings. But now I really think that before hacking, there was an option in menu "OPTION", that gives possibility to select battery type between Alkaline and Ni-mh. Is it true? I can't remember... Or it's only my fantasy? Does anybody here has UN-hacked MZ-N*** to see if your player has such option in menu. If it's true, please, can someone tell me, what the values of registers 61 and 62 in Service menu I need to save. I saw user's manuals but I can't find such option there. But I think that I really saw it in my player! The firmware of my MZ-N510 is 00 8 V1.300 Thank you.