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| − | ==Important Hex Addresses==
| + | The underworld refers to all indoor locations; including dungeons, caves, and houses. |
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| − | ===Room Headers===
| + | {{box|[[Underworld:Important Hex Addresses|Important Hex Addresses]]}} |
| − | *$027502-$027781 - Pointer Table, 2 byte local addresses, indexed by room.
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| − | *$027781-$027FEF - Data
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| − | <blockquote>
| + | {{box|[[Underworld:Rooms|Rooms]]}} |
| − | Headers are formatted thusly:
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| − | *byte 0: aaab bbcd
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| − | **the a bits are transformed into 0000 0aaa and stored to $0414 ("BG2" in Hyrule Magic)
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| − | **the b bits are transformed into 0000 0bbb and stored to $046C ("Collision" in Hyrule Magic)
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| − | **the c bit is unused
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| − | **the d bit is stored to $7EC005 (If set, use a lights out routine in the room transition)
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| − |
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| − | *byte 1: aabb bbbb
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| − | **the a bits are unused
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| − | **the b bits are transformed into bbbb bb00, thus making them a multiple of 4.
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| − | This value is used to load 4 different palettes for the dungeon, and corresponds to, you guessed it, Palette # in Hyrule Magic!
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| − | The resulting index is used to load values for $0AB6, $0AAC, $0AAD, and $0AAE
| + | {{toc}} |
| − |
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| − | *byte 2: gets stored to $0AA2 (GFX # in Hyrule Magic)
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| − |
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| − | *byte 3: value + #$40 gets stored to $0AA3 (Sprite GFX # in Hyrule Magic)
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| − |
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| − | *byte 4: gets stored to $00AD ("Effect" in Hyrule Magic)
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| − |
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| − | *byte 5: gets stored to $00AE ("Tag1" in Hyrule Magic)
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| − | *byte 6: gets stored to $00AF ("Tag2" in Hyrule Magic)
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| − | These are the planes to use for bytes 9 through D. This determines which
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| − | BG you appear on, and possibly more.
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| − |
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| − | *byte 7: aabb ccdd
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| − | **the a bits are transformed into 0000 00aa and stored to $063F
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| − | **the b bits are transformed into 0000 00bb and stored to $063E
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| − | **the c bits are transformed into 0000 00cc and stored to $063D
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| − | **the d bits are transformed into 0000 00dd and stored to $063C
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| − |
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| − | Note, the only safe values for a plane seem to be 0,1, or 2. Hyrule Magic
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| − | appears to violate this rule by letting you put 3 down, but nothing higher.
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| − |
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| − | *byte 8: aaaa aabb
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| − | **the a bits are unused
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| − | **the b bits are transformed into 0000 00bb and stored to $0640
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| − |
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| − | *byte 9: stored to $7EC000 These are all room numbers that you could possibly exit to.
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| − | **byte A: stored to $7EC001
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| − | **byte B: stored to $7EC002
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| − | **byte C: stored to $7EC003
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| − | **byte D: stored to $7EC004
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| − | </blockquote>
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| − | | |
| − | ===Sprite Data===
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| − | *$04D62E-$04D92E - Pointer Table, 2 byte local addresses, indexed by room.
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| − | ===Object Data===
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| − | *$0F8000-$0F83BF - Pointer Table, 3 byte long addresses, indexed by room.
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| − | ===Dungeon Secrets Data===
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| − | *$00DB69 - $00DDE8 - Pointer Table
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| − | ===Push Block Data===
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| − | *$0271DE-$027369 - Pointer Table
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| − | ===(Inter Room) Torch Data===
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| − | *$02736A-$027489 - Pointer Table
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| − | | |
| − | ===Chest Contents===
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| − | *$00E96E - $00EB65 - Data
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| − | | |
| − | ==Rooms==
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| − | ===Main Map===
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| − | The main underworld map consists of $FF (decimal: 256) rooms.
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| − | | |
| − | ===Secondary Map===
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The underworld refers to all indoor locations; including dungeons, caves, and houses.
