View source for RAM: Bank 0x7E: Pages 0x08, 0x09 and 0x0A

OAM Basic 512 byte table:
* {{$|0800}}[{{0x|200}}] = OAM data. This is blitted to VRAM every frame via DMA.
How OAM works:
568Byte1: X coordinate on screen in pixels. This is the lower 8 bits. See Extended OAM table below
Byte2: Y coordinate on screen in pixels.
Byte3: Character number to use. This is the lower 8 bits. See Byte 4
Byte4: vhoopppc (source: Qwertie's guide)
v - vertical flip
h - horizontal flip
p - priority bits
c - the 9th (and most significant) bit of the character number for this sprite.
Extended OAM 32 byte table:
* {{$|0A00}}[{{0x|20}}] = Each byte contains information for 4 sprites (in the same order as the normal OAM table. For each
sprite:
bit0 : size toggle bit. (this can mean 8x8 or 16x16, or 8x8 or 32x32, etc.
bit1 : 9th (and most significant) bit of the X coordinate.
* {{$|0A20}}[{{0x|80}}] = Apparently contains bits of data to combine and write to $0A00 to $0A1F later. Thus the individual
properties are stored in this array, and ORed in later to form the data that will get blitted to VRAM.
Apparently Palette Related, but details lacking:
* {{$|0AA0 - ???
* {{$|0AA1}}[{{0x|01}}] = Main Tile Theme index.
Altering this has far more effect than $0AA2.
There are 0x25 (37) main BG tile themes.
* {{$|0AA2}}[{{0x|01}}] = Auxiliary Tile Theme index.
There are 0x52 (82) auxiliary BG tile themes.
* {{$|0AA3}}[{{0x|01}}] = Sprite Graphics index. Note that when in a dungeon, this value is the number
found in the dungeon header, plus $40. Overworlds do not have this complication.
* {{$|0AA4}}[{{0x|01}}] = Misc. Sprite Graphics index. Valid values are: 0x01, 0x0A, or 0x0B.
0x01 - Light world Overworld
0x0A - Dungeons
0x0B - Dark World Overworld
All other values are so far assumed to decompress the wrong type of graphics.
I.e., not all the graphics in the rom are de facto compressed. Some are just stored in a
proprietary 3bpp format.
* {{$|0AA5}}[{{0x|01}}] = free ram
* {{$|0AA6}}[{{0x|02}}] = Unused? (but referenced in a few places). It's location would indicate that at one point it
would have been a variable used to configure graphics.
* {{$|0AA8}}[{{0x|02}}] = Note: typically only the high byte ($0AA9) of this variable is modified.
By design this variable is only ever set to two values: 0x0000 and 0x0200.
It's used during palette loading to select between the auxiliary palette buffer ($7EC300) and
569the main palette buffer ($7EC500) as targets to write colors to.
Only really used in Bank $1B
* {{$|0AAA}}[{{0x|01}}] = Confusing variable, relates to $0FC6 somehow
* {{$|0AAB}}[{{0x|01}}] = Free ram?
* {{$|0AAC}}[{{0x|01}}] = Used to load SP-0 (first half) Usually inanimate object sprites. Valid values are 0x00 to 0x0B
* {{$|0AAD}}[{{0x|01}}] = Used to load SP-5 (first half) Usually for sprites specific to an area / room. Valid values are 0x00 to 0x17
* {{$|0AAE}}[{{0x|01}}] = Used to load SP-6 (first half) Usually for sprites specific to an area / room. Valid values are 0x00 to 0x17
* {{$|0AAF}}[{{0x|01}}] = Free ram
* {{$|0AB0}}[{{0x|01}}] = So far only seen referenced in an unreferenced palette routine.
Thus, can be considered Free RAM for now.
* {{$|0AB1}}[{{0x|01}}] = Used to load SP-6 (second half) Used for the palette for throwable objects
* {{$|0AB2}}[{{0x|01}}] = Used to select the first palette in CGRAM (the screen's background is its first color)
As far as I know, this value is only 0 or 1.
1 seems to be for special modes like the ending sequence.
The first palette is by default in LTTP used for the HUD.
* {{$|0AB3}}[{{0x|01}}] = Selects BP-2 through BP-6 (first halves)
0 - Light World
1 - Dark World
2 - Light World Death Mountain
3 - Dark World Death Mountain
4 - Used during history mode
5 - Seems to be used during initialization
* {{$|0AB4}}[{{0x|01}}] = Selects BP-2 through BP-4 (second halves). Values 0x00 to 0x13 are valid.
Only used during loading the overworld and the title screen.
* {{$|0AB5}}[{{0x|01}}] = Selects BP-5 through BP-7 (second halves). Values 0x00 to 0x13 are valid.
Only used during loading the overworld and the title screen.
* {{$|0AB6}}[{{0x|01}}] = Controls all 6 of the 4bpp background palettes (in dungeon mode) (BP-2 through BP-7)
The 2bpp background palette controller is $0AB2 above.
* {{$|0AB7}}[{{0x|01}}] = While only referenced as being cached to $7EC20C, it is seemingly unused in practice
* {{$|0AB8}}[{{0x|01}}] = Selects BP-7 (first half). Only valid for values 0x00 to 0x0D
* {{$|0AB9}}[{{0x|04}}] = Free ram
* {{$|0ABD}}[{{0x|01}}] = Used in order to swap palettes under certain special circumstances.
Apparently related almost entirely to the flute boy ghost and the ponds of wishing.
When zero, doesn't induce any behaviour change, but when nonzero, it will cause
SP-0 and SP-7 (full) to swap and SP-5 and SP-3 (second halves) to swap.
* {{$|0ABE}}[{{0x|02}}] = Free ram
570$0ABF}}[{{0x|01}}] = Set to zero when an event is initialized, and will be set to 1 the next time a change of overworld
area occurs. This is used to trigger the magic powder showing up in the Witch's hut, as well as
the finishing of your sword being tempered. Also used to make sure you didn't cheat during the
heart piece maze game in Kakkariko.
DMA Variables: To see these in action, look up routine $9E0 in the banks files. These are all Word values.
* {{$|0AC0}}[{{0x|02}}] = ROM Address for certain DMA transfers from Bank $7E.
The value stored here is grabbed from a table indexed by address $0107.
* {{$|0AC2}}[{{0x|02}}] = Also a ROM Address for DMA transfers, usually is 0x180 higher than $0AC0
* {{$|0AC4}}[{{0x|02}}] = ROM Address for certain DMA transfers from Bank $7E.
The value stored here is grabbed from a table indexed by address $0108.
* {{$|0AC6}}[{{0x|02}}] = Also a ROM Address for DMA transfers, usually is 0xC0 higher than $0AC4
* {{$|0AC8}}[{{0x|02}}] = ROM Address for certain DMA transfers from Bank $7E.
The value stored here is grabbed from a table indexed by address $0109.
* {{$|0ACA}}[{{0x|02}}] = Also a ROM Address for DMA transfers, is a fixed distance from $0AC8 which is also
determined using a table indexed by $0109.
* {{$|0ACC}}[{{0x|02}}] = ROM Address for certain DMA transfers from Bank $10.
The value stored here is grabbed from a table indexed by address $0100
* {{$|0ACE}}[{{0x|02}}] = Also a ROM Address for DMA transfers, usually is 0x200 higher than $0ACC
* {{$|0AD0}}[{{0x|02}}] = ROM Address for certain DMA transfers from Bank $10.
The value stored here is grabbed from a table indexed by address $0100
* {{$|0AD2}}[{{0x|02}}] = Also a ROM Address for DMA transfers, usually is 0x200 higher than $0AD0
* {{$|0AD4}}[{{0x|02}}] = ROM Address for certain DMA transfers from Bank $10.
The value stored here is grabbed from a table indexed by address $0102
* {{$|0AD6}}[{{0x|02}}] = ROM Address for certain DMA transfers from Bank $10.
The value stored here is grabbed from a table indexed by address $0104
* {{$|0AD8}}[{{0x|02}}] = ROM Address for certain DMA transfers from Bank $7E.
The value stored here is grabbed from a table indexed by address $02C3
* {{$|0ADA}}[{{0x|02}}] = Also a ROM Address for DMA transfers, usually is 0x100 higher than $0AD0
* {{$|0ADC}}[{{0x|01}}] = ROM Address for certain DMA transfers from Bank $7E.
The value stored here is determined like this: the value at $7EC00F + the fixed value 0xA680.
* {{$|0ADE}}[{{0x|02}}] = free ram
* {{$|0AE0}}[{{0x|02}}] = ROM Address for certain DMA transfers from Bank $7E.
The value stored here is determined like this: the value in the table at $0085DE indexed
by $7EC015 + the fixed value 0xB280.
* {{$|0AE2}}[{{0x|02}}] = Also a ROM Address for DMA transfers, usually is 0x100 higher than $0AE0
* {{$|0AE4}}[{{0x|04}}] = free ram
* {{$|0AE8}}[{{0x|02}}] = Used as an offset for $0AEC.
571$0AEA}}[{{0x|02}}] = Used as an offset for $0AF0
* {{$|0AEC}}[{{0x|02}}] = ROM Address for certain DMA transfers from Bank $7E.
The value stored is determined like this: the value at $0AE8 + the fixed value 0xB940
* {{$|0AEE}}[{{0x|02}}] = Also a ROM Address for DMA transfers, usually is 0x200 higher than $0AEC
* {{$|0AF0}}[{{0x|02}}] = ROM Address for certain DMA transfers from Bank $7E.
The value stored is determined like this: the value at $0AEA + the fixed value 0xB940
* {{$|0AF2}}[{{0x|02}}] = Also a ROM Address for DMA transfers, usually is 0x200 higher than $0AF0
* {{$|0AF4}}[{{0x|02}}] = Used as an offset for $0AF0
* {{$|0AF6}}[{{0x|02}}] = ROM Address for certain DMA transfers from Bank $7E.
The value stored is determined like this: the value at $0AF4 + the fixed value 0xB540
* {{$|0AF8}}[{{0x|02}}] = Also a ROM Address for DMA transfers, usually is 0x200 higher than $0AF6
* {{$|0AFA}}[{{0x|06}}] = free ram