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DRINKING GAME SCOREKEEPER (V1)

This puzzle used to be in the game until it was dumbed down, and it wasn't even preserved in the puzzle archive. I liked it because it was the only puzzle that required a rising edge detector, allowing for really clever solutions. That's why I recreated it here.
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• point and foul are simple inputs connected to buttons.
  
• display is an XBus output connected to a numerical display.
  
• The counter should keep track of a count, starting at 0, and constantly update display with the current value.
  
• When point transitions from low to high the count should be incremented.
  
• When foul transitions from low to high the count should be decremented.

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Simple explanation of PGA33X6 (you might need it)