Big Key for cave/FD

1 = From cave
2 = 0xFD state (pass through Throne room from cave)

Big Key's set when grabbing a big key:

  2 Unused
  2 Unused
    Ganon's Tower
    Turtle Rock
    Gargoyle's domain
1   Tower of Hera
    Ice Palace
    Skull Woods
    Misery Mire
    Dark Palace
    Swamp Palace
    Hyrule Castle 2 (doesn't exist)
1   Desert Palace
    Eastern Palace
1 2 Hyrule Castle
1 2 Sewer Passage (doesn't exist)

Big keys that are used when opening a big key chest or door.

1   Unused
1   Unused
1 2 Ganon's Tower
    Turtle Rock
1   Gargoyle's domain
    Tower of Hera
  2 Ice Palace
  2 Skull Woods
  2 Misery Mire
1 2 Dark Palace
  2 Swamp Palace
1 2 Hyrule Castle 2 (doesn't exist)
    Desert Palace
    Eastern Palace
1   Hyrule Castle
1   Sewer Passage (doesn't exist)