Crystal Beans from Dungeon Explorer/Map GfxDataPtrs

Map:GfxDataPtrs
Game	Crystal Beans From Dungeon Explorer
Start Address	0x030E79
End Address	0x03123E
# of Entries	46
Entry Length	21
Total Length	966 (0x3C6)
Back to the ROM map

These structures contains the pointers to the information pertaining to the graphical appearance and organization of the level.

Format

Map

• Length: 3 (0x3)
• Offset within entry: 0x0-0x2
• Range of values: ?

24-bits pointer to the compressed map. When decompressed, it contains the block numbers that make up the map BG. It is 256 blocks (bytes) wide.

BlockTilemapData

• Length: 3 (0x3)
• Offset within entry: 0x3-0x5
• Range of values: ?

24-bits pointer to the compressed block tilemap data.

When decompressed, the first 1024 bytes contain an array of 256 array of 4 bytes containing the tile numbers for each block. Byte 0: top-left, byte 1: top-right, byte 2: bottom-left, byte 3: bottom-right.

The next 512 bytes contain an array of 256 arrays of 4 nibbles (2 bytes) containing the palette numbers for each block. Nibble 0: top-left, nibble 1: top-right, nibble 2: bottom-left, nibble 3: bottom-right.

BlockFlags?

• Length: 3 (0x3)
• Offset within entry: 0x6-0x8
• Range of values: ?

24-bits pointer to the compressed block flags. When decompressed, it contains an array of 256 bytes (1 per block).

BgGfx

• Length: 3 (0x3)
• Offset within entry: 0x9-0xB
• Range of values: ?

24-bits pointer to the compressed map background graphics.

Palette

• Length: 3 (0x3)
• Offset within entry: 0xC-0xE
• Range of values: ?

24-bits pointer to the compressed map palette.

Unknown 1

• Length: 3 (0x3)
• Offset within entry: 0xF-0x11
• Range of values: ?

24-bits pointer.

Unknown 2

• Length: 3 (0x3)
• Offset within entry: 0x12-0x14
• Range of values: ?

24-bits pointer. NULL (0) if not used.