System 9 | Matt's Basement Arcade

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System 9 games have the software revision identified with an “L” to signify the Level of software release. To see what version your game is running, set your test switch to AUTO/UP and press ADVANCE while in Game Over mode. You will see “2GGG” in the player 1 display, where GGG is the game number. The player 2 display will show the number of the installed game revision.