That rom change was for a home version
So it had no ball save from factory??
No - it was like TZ, Addams - it was a deliberate design feature that was not included. To me, i quite like the challenge of playing these machines without a ball save, however, can understand it might be frustrating for a newbie off the street who has just paid $1 and its all over in 45 secs....although that is probably no different to most games i play on an EM!
TZ wouldn't work with a ball save particularly in tournaments, as people would probably take too much advantage if the powerball was next up in the ball trough, and deliberately drain the normal ball before it it get much higher chance of points during powerball mania