Default Tilemap Attribute Register: Difference between revisions
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cross-linking with main Tilemap article |
more explicit description of palette offset |
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! Bit !! Function | ! Bit !! Function | ||
|- | |- | ||
| 7-4 || Palette Offset | | 7-4 || Palette Offset (copied as bits 7-4 in final palette index) | ||
|- | |- | ||
| 3 || X mirror | | 3 || X mirror | ||
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This attribute is used for all tiles if bit 5 of {{NextRegNo|$6B}} is set. | This attribute is used for all tiles if bit 5 of {{NextRegNo|$6B}} is set. | ||
When bit 1 of {{NextRegNo|$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 | When bit 1 of {{NextRegNo|$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 {{NextRegNo|$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"). | |||
Latest revision as of 08:05, 13 May 2020
| Number | TBRegisterNumber::$6C |
|---|---|
| Readable | TBRegisterReadable::Yes |
| Writable | TBRegisterWritable::Yes |
| Short Description | ShortDesc::Default tile attribute for 8-bit only maps. |
| Bit | Function |
|---|---|
| 7-4 | Palette Offset (copied as bits 7-4 in final palette index) |
| 3 | X mirror |
| 2 | Y mirror |
| 1 | Rotate |
| 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 {{#ask: TBRegisterNumber::$6B }} ($6B) is set.
When bit 1 of {{#ask: TBRegisterNumber::$6B }} ($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 {{#ask: TBRegisterNumber::$6B }} ($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").