Default Tilemap Attribute Register
|Short Description||Default tile attribute for 8-bit only maps.|
|7-4||Palette Offset (copied as bits 7-4 in final palette index)|
|0||If in 512-tile-mode: bit 8 of tile-id|
else draw priority: 1 = ULA over tilemap, 0 = tilemap over ULA
This attribute is used for all tiles if bit 5 of Tilemap Control Register ($6B) is set.
When bit 1 of Tilemap Control Register ($6B) is set, the bit 0 of tile attribute works as ninth bit of tile-id (allowing 512 tiles in total), and the priority of layers is then "ULA over Tilemap" as default.
When bit 3 of Tilemap Control Register ($6B) is set, the bits 7-1 works as Palette offset (copied to bits 7-1 in final palette index, bit 0 comes from pixel data) (there are no mirror/rotate bits in the "text mode").