Quoted from TimMe:From what I can tell, the only reason is to make it more difficult to keep track of the position of the FS relay. On this game, the FS relay always moves to the next even match number position at the start of each ball in play, so that each player starts their ball with the same lanes lit for 5000. Because of this, if a player knows the match sequence on a Gottlieb EM (it was always the same), and they make a note of the lit match number just before they start a new game, and they keep track of the number of lane light toggles, they can determine which match number will appear at the end of the game.
That guess may sound far-fetched, but Gottlieb (and the other companies) always had something in their circuitry to obscure the 0-9 stepper so that the match number was difficult to track. That's because, back in the day when these machines were on location, it was fairly common for players to tilt out their last ball on any game where the match number was known in advance. As soon as their score showed the correct match number, they would tilt so they could win a free game by matching. This usually occurred on machines where the 0-9 stepper was stuck, and the machine always showed the same number for match every game.
The manufacturers were well aware that no operator would want a game that let a clever player figure out things like the next match number.
- TimMe
I like that... but man... lotsa keeping track of stuff while your trying to play, and then trying to hit a 10 point target a few times, without hitting another 100 point target to line up your score with the match number...just to save a quarter . Maybe there was cannabis involved.
Sidebar: I was having problems with my coin unit triggering correctly a little while ago, and found the match lights were on during the game (coin unit stays in 0 position). So for interests sake, when I was trying to finger out this FS thing, during a one player game I reached in through the door, and triggered the coin unit relay to go back to the zero position. I wanted to see if the match numbers were progressing through each of the 100 point scores, for a 500 point rollover, and of course they were. Try it!
Also, I figured the alternating rollover lights should also toggle back and forth throughout a 500 point score, but a switch on the motor (3D) turns off those lights during the scoring cycle, and they come back on after... and because it's and odd number of toggles, the opposite lights are on. When time permits, I'm going to short out the 3D switch to keep the lights on during scoring to see if they toggle back and forth 5 times... expecting they should.