Final Fantasy Tactics Advance/Maps

Map Information

Data structures

struct FFTA_map

0x58 bytes

Member name	Length	Offset	Type	Maximum value	Description
graphics_data	4	0x00	Pointer	N/A	A pointer diff pointing to the beginning of the map tile graphics data
arrangement_data	4	0x04	Pointer	N/A	A pointer diff pointing to the beginning of the data that arranges the tiles
Unknown	4	0x08	Pointer	N/A	A pointer diff pointing to something that has to do with clipping
palette_data	4	0x0C	Pointer	N/A	A pointer diff pointing to the beginning of the palette data
height_data	4	0x10	Pointer	N/A	A pointer diff pointing to the beginning of the map height data
Unknown	68	0x14	N/A	N/A	Unknown, usually mostly blank

All pointer diffs in this structure are against 0x08569104.

struct FFTA_map_tile

struct FFTA_map_tile {
    uint8 height;
    int8 cannot_walk_on;
};

• height: The height of the tile. There is no offset from what is displayed. Setting to higher than 99 (0x63) causes graphical glitches, but no crashing. Setting to 0 makes the tile invalid, such that it can't be selected. This value is unsigned.
• cannot_walk_on: 0 if the tile can be walked on, 1 otherwise. Other values seem to have the same effect as a 1.

Data layout

In RAM

Each block of map data starts at the top corner, and goes toward the right corner. The end of a row seems to be padded such that the last couple of bytes, until 0xXF, are zero. Unknown what happens if modified.

0x02007CB0(block of FFTA_map_tile): Beginning of map data in RAM

...

0x02007F14(void*): Pointer to 0x02007CB0. If changed, map data changes to correspond to the new pointer.

...

0x02007F1D(u?int8): NW-SE dimension of the map.

0x02007F1E(u?int8): Unknown. Set to 0x0C.

0x02007F1F(u?int8): NE-SW dimension of the map.

In ROM

0x08019E7C(4 bytes): 0x02007CB0 - Address to start reading map height data from in scenes

0x0801F0DC(4 bytes): 0x02007CB0 - Address to write map height data to

0x08569104 - 0x0856915B: Map data pointers for map 0

0x08569104(Pointer): Pointer to map tile graphics data in map 0

0x08569108(Pointer): Pointer to map tile arrangement data in map 0

0x0856910C(Pointer): Pointer to unknown data in map 0

0x08569110(Pointer): Pointer to palette data in map 0

0x08569114(Pointer): Pointer to map height data in map 0

Default locations of map data

	Tile graphics data	Tile arrangement data	Unknown data	Palette data	Map height data
Map 0	0x0856C8B4	0x0856F528	0x0856FEF8	0x0856F4A8	0x085704C8

• There are 163 maps, indexed from 0x00 to 0xA2. Most maps have a night version (palette shift), too.