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Yu-Gi-Oh! Duel Monsters 4: Kaiba Deck (Early Days Collection)/ROM map

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Just listing a few breakpoints. ROM Map for the original game can be accessed on this link. RAM addresses should be the same as in the original release.

Bank 1

  • 0x870B / 1:470B - Write card quantities in Trunk
  • 0x8CB6 / 1:4CB6 - Retrieve next card in Player's deck
  • 0x8D3C / 1:4D3C - Check if there are 40 cards in deck; b = 1 if 40 cards in deck, b = 0 if not

Bank 3

  • 0xC12C / 3:412C - Field management, Arena / Forest / Wasteland / Mountain / Sogen / Umi / Yami
  • 0xC528 / 3:4528 - Draw a card

Bank B

  • 0x2C04D / B:404D - Limited cards
  • 0x2C0DC / B:40DC - Allowed cards
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