Are there jumpin' jackpot codes

Answer 1

There are, but you need the game keys to enter them, and none of them are interesting from a player's perspective. The Test button, mentioned below, is mounted just to the left of the coin mechs, behind the coin door.

Hold 3rd Coin and press Test button: Test the game's RAM. The game will sit for approximately one minute, testing the game system RAM. The red text LEDs will say "PASS" or "FAIL" depending on whether the RAM is good. At this point, press Test to resume normal gameplay.

Hold 2nd Coin and press Test button: LED test. All the game LEDs except the red jumprope LEDs light up so you can see whether everything is working. Press Test to resume normal gameplay.

Hold 1st Coin and press Test button: I'm not sure what this is; it's not documented in the game's manual. It appears to be either a set of in-software counters for coins and tickets, or a debug mode that reads and displays portions of the game memory. Test button returns to normal gameplay.

And obviously, simply pressing the Test button without holding any other buttons enters service mode, where you set such things as the ticket payout, volume, and game difficulty.