View source for RAM: Bank 0x7E: Page 0x04

For a break down on how room data gets saved, see the SRAM Document.
* {{$|0400
* {{$|0401 - Tops four bits: In a given room, each bit corresponds to a door being opened.
If set, it has been opened by some means (bomb, key, etc.)
* {{$|0402}}[{{0x|01}}] = Certainly related to $0403, but contains other information I haven’t looked at yet.
* {{$|0403}}[{{0x|01}}] = Contains room information, such as whether the boss in this room has been defeated.
Loaded on every room load according to map information that is stored as you play the game.
Bit 0: Chest 1
Bit 1: Chest 2
Bit 2: Chest 3
Bit 3: Chest 4
Bit 4: Chest 5
Bit 5: Chest 6 / A second Key. Having 2 keys and 6 chests will cause conflicts here.
Bit 6: A key has been obtained in this room.
Bit 7: Heart Piece has been obtained in this room.
* {{$|0405}}[{{0x|01}}] = This never seems to be written (free ram?)
* {{$|0406}}[{{0x|02}}] = free ram
* {{$|0408}}[{{0x|02}}] = ????
* {{$|040A}}[{{0x|01}}] = Area Index for the Overworld. Although there are $C0 different possible values, the larger maps
seem to take up more of these values so that coordinate addresses can be more easily calculated,
and scrolling eliminated at times.
* {{$|040B}}[{{0x|01}}] = free ram
* {{$|040C}}[{{0x|02}}] = Map index for dungeons. If it = 0xFF, that means there is no map for that area.
There is a data table of values, probably depends on the entrance you go in how this gets selected.
Notably used in Ganon’s Tower for minibosses. Note that the value held here is the dungeon’s intuitive
index multiplied by 2. Hence this value is always even.
* {{$|040E}}[{{0x|01}}] = Contains the layout and starting quadrant info (from dungeon header)
* {{$|040F}}[{{0x|0?}}] = free ram.
* {{$|0410}}[{{0x|02}}] = -------- ----udlr Screen transition direction bitfield
559When the overworld is transitioning screens, only one of the "udlr" bits will be set.
* {{$|0412}}[{{0x|02}}] = Index used during screen transitions to gradually, over the course of several frames,
transmit data to vram. See variables $19 and $0118
* {{$|0414}}[{{0x|02}}] = BG2 properties in Hyrule Magic
Detailed description of CGADDSUB properties per type:
Note that both parallax modes are the same from the register standpoint
0 - "Off"
- Main: BG2, BG3, Obj; Sub: None; +/-: background
1 - "Parallaxing" - Main: BG2, BG3, Obj; Sub: BG1; +/-: background
2 - "Dark Room" - Main: BG2, BG3, Obj; Sub: BG1, BG1; +/-: background
3 - "On top"
- Main: BG1, BG2, BG2, Obj; Sub: None; +/-: background
4 - "Translucent" - Main: BG2, BG3, Obj; Sub: BG1; +/-: (1/2 +) back. BG1
5 - "Parallaxing 2" - Main: BG2, BG3, Obj; Sub: BG1; +/-: background
6 - "Normal"
- Main: BG2, BG3, Obj; Sub: BG1; +/-: background
7 - "Addition" - Main: BG2, BG3, Obj; Sub: BG1; +/-: (full +) back. BG1
* {{$|0416}}[{{0x|02}}] = -------- ----udlr Screen transition direction bitfield 2
When the overworld is transitioning screens, only one of the "udlr" bits will be set.
* {{$|0418}}[{{0x|02}}] = 0 - Overworld screen transition up
1 - Overworld screen transition down
2 - Overworld screen transition left
3 - Overworld screen transition right
Values greater than 3 should not show up
* {{$|041A}}[{{0x|02}}] = vvvvvvvv vvvvvvid
d - disable horizontal and vertical
i - inverts the direction of the floor movement, specified by $0310 / $0312
v - if any of these bits are set, the floor movement will be vertical. Otherwise it will be horizontal
* {{$|041C}}[{{0x|02}}] = ??? referenced in trick hidden walls
The value of this is used by various "Effect" settings in the dungeons
* {{$|041E}}[{{0x|02}}] = ???
* {{$|0422}}[{{0x|02}}] = X offset of the moving floor. (Also used to position the crystal maidens during the 3D sequence)
* {{$|0424}}[{{0x|02}}] = Y offset of the moving floor. ""
* {{$|0426}}[{{0x|02}}] = free ram
* {{$|0428}}[{{0x|01}}] = Mirror of $AD, which is "Collision" in Hyrule Magic. This is an independent flag that determines
how scrolling of the BGs occurs in the dungeon submodule.
* {{$|0429}}[{{0x|01}}] = free ram?
* {{$|042A}}[{{0x|02}}] = Used with Hidden walls? Maybe other uses. See Bank $01
560$042C}}[{{0x|02}}] = Types that use this index: moveable blocks, pots and other liftable objects, breakable floors,
and moles. Collectively the limit for these types of objects is 16 per room.
Notes about cracked floors so I don't go insane!
* The breakable floor that is first in the objectlist is the the one that will open up. *
( Do ctrl-B on a cracked floor among others in Hyrule Magic if you don't believe me).
Okay... so why does only one cracked floor open up?
It doesn't make any sense right? The tile type is 62 for all cracked floors post load.
* {{$|042E}}[{{0x|02}}] = Index of torches in the room (since blocks are loaded first this value gets updated after the fact.)
* {{$|0430}}[{{0x|02}}] = Flag that is nonzero when Link has triggered a floor switch and is still standing on it.
When he walks away from it, this flag will reset to zero.
* {{$|0432}}[{{0x|02}}] = number of star shaped switches in a room
* {{$|0434}}[{{0x|02}}] = free ram?
* {{$|0436}}[{{0x|01}}] = ????
* {{$|0437}}[{{0x|01}}] = ????
* {{$|0438}}[{{0x|02] -
* {{$|043A}}[{{0x|02] -
* {{$|043C}}[{{0x|02] -
* {{$|043E}}[{{0x|02] -
* {{$|0440}}[{{0x|02] -
* {{$|0442}}[{{0x|02] -
* {{$|0444}}[{{0x|02] -
* {{$|0446}}[{{0x|02] -
number of in-floor inter-room up-north staircases .............. (1.2.0x2D)
number of in-floor inter-room down-south staircases ....... (1.2.0x2E, 1.2.0x2F)
number of in-room up-north staircases ................................. (1.2.0x30)
number of in-room up-north staircases ................................. (1.2.0x31)
number of inter-pseudo-bg up-north staircases .................. (1.2.0x32)
number of in-room up-north staircases ................................. (1_2.0x33) (for use in water rooms)
number of activated water ladders ........................................ (1.2.0x35)
number of water ladders .......................................................... (1.2.0x36)
* {{$|0448}}[{{0x|02}}] = This is tracking variable for dungeon objects with the catch that
it is only used in rooms that have water objects (not 100% sure of this.)
But it seems to be the activator that converts normal inter-bg type staircases
to ones that let you jump into water, like in the Swamp Palace.
* {{$|044A}}[{{0x|02}}] = Something to do with in-room staircases, but I'm otherwise clueless
* {{$|044E}}[{{0x|02}}] = number of different kind of doors? (related to $0460 I think)
* {{$|0450}}[{{0x|02}}] = number of Type 0x14 (10 decimal in HM) doors. Also see $06D0
* {{$|0452}}[{{0x|02}}] = ???? seen used with bombable walls (the big ones) but otherwise, not sure
* {{$|0454}}[{{0x|02}}] = Seems to indicate the state of a large wall being bombed open. Ranges from 0x01 to 0x15
The numerical value probably is used to pick which section of the wall to bomb open.
* {{$|0456}}[{{0x|02}}] = Used by doors system? Not sure how exactly.
* {{$|0458}}[{{0x|02}}] = 0 - In a dark room, 1 - you're in a dark room and have the lantern
561$045A}}[{{0x|01}}] = Seems to be the number of torches that are lit in a dark room.
Torch objects during load can be set to be permanently lit, so this can affect how the
room's lighting behaves.
* {{$|045B}}[{{0x|01}}] = ????
* {{$|045C}}[{{0x|02}}] = ????
* {{$|045E}}[{{0x|02}}] = free ram
* {{$|0460}}[{{0x|02}}] = Number of Locked doors? (range 0 - 3?) Number of doors that have been loaded in the room?
* {{$|0462}}[{{0x|02}}] = ??? related to submodule 12 of modules 7 and 9
With staircases, indicates a value of 0 to 7 of which staircase it is.
* {{$|0466}}[{{0x|02}}] = Seems to be related to trap doors or switches somehow...
* {{$|0468}}[{{0x|02}}] = Flag that is set when trap doors are down.
* {{$|046A}}[{{0x|02}}] = Similar to $0490, this is Floor 2 in Hyrule Magic
* {{$|046C}}[{{0x|01}}] = "Collision" in Hyrule Magic.
* {{$|046D}}[{{0x|05}}] = free ram
* {{$|0470}}[{{0x|02] -
* {{$|0472}}[{{0x|02}}] = ???? related to watergate special routine
* {{$|0474}}[{{0x|02}}] = Limited use between Bank 0x01 and 0x07.
* {{$|0476}}[{{0x|02}}] = Pseudo bg level.
Indicates which "level" you are on, either BG1 or BG2. BG1 is considered 1 in many
cases. However, there is no need for BG1 necessarily. When Link can interact with BG1,
this value should match $00EE, I think.
This mostly applies to staircases in rooms that only use one BG to interact with.
* {{$|0478}}[{{0x|02}}] = ????
* {{$|047A}}[{{0x|02}}] = ????
* {{$|047C}}[{{0x|02}}] = Used with doors.
; checked first?
* {{$|047E}}[{{0x|02]
* {{$|0480}}[{{0x|02]
* {{$|0482}}[{{0x|02]
* {{$|0484}}[{{0x|02]
-
-
-
-
number of wall up-north spiral staircases ..................... (1.2.0x38)
number of wall down-north spiral staircases ................ (1.2.0x39)
number of wall up-north spiral staircases ..................... (1.2.0x3A)
number of wall down-north spiral staircases ................ (1.2.0x3B)
* {{$|0486}}[{{0x|02}}] = ????
* {{$|0488}}[{{0x|02}}] = ????
562$048A}}[{{0x|02}}] = Relates to the plane variables ($063C-$0640)
* {{$|048C}}[{{0x|02}}] = ????
* {{$|048E}}[{{0x|02}}] = Room index in dungeons?
* {{$|0490}}[{{0x|02}}] = In a dungeon room, provides the type of filler tiles (Floor 1 in Hyrule Magic)
* {{$|0492}}[{{0x|02}}] = ????
* {{$|0494}}[{{0x|02}}] = ????
* {{$|0496}}[{{0x|02}}] = number of chests in the room
* {{$|0498}}[{{0x|02}}] = number of big key lock blocks in the room
* {{$|049A}}[{{0x|02}}] = number of 1.3.0x1B objects
* {{$|049C}}[{{0x|02}}] = number of 1.3.0x1C objects
* {{$|049E}}[{{0x|02}}] = number of 1.3.0x1D objects
* {{$|04A0}}[{{0x|01]
* {{$|04A1}}[{{0x|01]
* {{$|04A2}}[{{0x|02]
* {{$|04A4}}[{{0x|02]
* {{$|04A6}}[{{0x|02]
* {{$|04A8}}[{{0x|02]
-
-
-
-
-
-
Countup timer that stops at 0xC0. While running, the floor that Link is on in a dungeon is displayed.
free ram, probably
number of in-wall inter-room up-north straight staircases ................. (1.3.0x1E, 0x26)
number of in-wall inter-room up-south straight staircases ................. (1.3.0x20, 0x28)
number of in-wall inter-room down-north straight staircases ............ (1.3.0x1F, 0x27)
number of in-wall inter-room down-south straight staircases ............ (1.3.0x21, 0x29)
* {{$|04AA}}[{{0x|02}}] = (conflict) Flag, that if nonzero, tells us to load using a starting point entrance value
rather than a normal entrance value.
* {{$|04AA}}[{{0x|01}}] = This is used when you die and choose to save & continue
It is the dungeon entrance to put Link into.
This variable is only used if you die in a dungeon, and is set to the
last dungeon entrance you went into.
* {{$|04AB}}[{{0x|01}}] = free ram
* {{$|04AC}}[{{0x|02}}] = When most tiles are changed in a particular overworld screen this value is incremented by 2
and $7EF800 and $7EFA00 are updated to contain the address of the modification and the
tile (map16) used replace it. This only comes into play when a warp between the DW or
the LW fails and you have to warp back.
* {{$|04AE}}[{{0x|01}}] = number of in-room up-south staircases ............ (1.3.0x33) (for use in water rooms)
* {{$|04B0}}[{{0x|02}}] = ???? Relates to object type 1.1.0x35
Which, by the way, seems to be unused... and buggy.
* {{$|04B2}}[{{0x|01}}] = Related to shovel, but not entirely clear yet how.
* {{$|04B4}}[{{0x|01}}] = see overworld module submodule 0
* {{$|04B5}}[{{0x|01}}] = ????
* {{$|04B6}}[{{0x|02}}] = Position in tile attribute buffer where trigger tile was hit?
563$04B7}}[{{0x|01}}] = ????
* {{$|04B8}}[{{0x|02}}] = Flag that indicates you are close to a big key door, and the text message saying you don’t have a key has
already triggered. It resets when you move away from the door.
Also works outdoors when a door tells you you can't enter with stuff following you.
* {{$|04BA}}[{{0x|02}}] = Index of overlay to load in a dungeon room (in response to an event, typically)
* {{$|04BC}}[{{0x|02}}] = Seems to be a toggle between two different states of holes in a room. (For rooms that can switch back
and forth?)
* {{$|04BE}}[{{0x|01}}] = Countdown timer for trinexx red dragon head palette transitioning
* {{$|04BF}}[{{0x|01}}] = Countdown timer for trinexx blue dragon head palette transitioning
* {{$|04C0}}[{{0x|01}}] = Relates to trinexx red dragon head palette transition state
* {{$|04C1}}[{{0x|01}}] = Relates to trinexx blue dragon head palette transition state
* {{$|04C2}}[{{0x|01}}] = Relates to giving of critical items after boss fights...
* {{$|04C3}}[{{0x|01}}] = free ram
* {{$|04C4}}[{{0x|01}}] = Number of credits left for opening minigame chests 0xFF if entirely disabled
* {{$|04C5}}[{{0x|01}}] = State dealing with Ganon's fight = 2 - you can hit him,
1 - he's translucent,
0 - he’s invisible.
* {{$|04C6}}[{{0x|01}}] = Trigger for special animations
0 - nothing
1 - Dark Palace entrance
2 - Skull Woods entrance (when it burns)
3 - Misery Mire entrance
4 - Turtle Rock entrance
5 - Ganon’s Tower entrance
* {{$|04C7}}[{{0x|01}}] = Appears to serve as a barrier variable for tag related logic in Dungeon rooms when set.
Also prevents traveling on staircases and other such things.
* {{$|04C8}}[{{0x|02}}] = Only used in peg puzzles as an index of which or how many peg tiles have been hammered down
In the case of the Light World Death Mountain peg puzzle it's an index of how many successful steps
have been completed, and is actually twice the number of pegs that have been hammered
In the case of the Dark World peg puzzle near the ruined Smithy house it's just the number of pegs
hammered so far
* {{$|04CA}}[{{0x|01}}] = When you are low on life, this is used as a timer
It loops between $1F down to $0. When it reaches zero, the low life beep happens
* {{$|04CB}}[{{0x|15}}] = free ram.
* {{$|04F0}}[{{0x|10}}] = Timers for Torches (byte entries). When lit, starts with a value of 0xFF and counts down to 0.
Setting it before the torch is lit is a bad idea - it will not cause a torch to light, nor will it brighten the
room. Note that this range indicates we can have up to 16 torches in an area.