ULANext Attribute Byte Format Register: Difference between revisions
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Core 2.00.26 changes |
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The 255 value enables the full ink colour mode and all the the palette entries are inks but the paper will be of the colour at position 128. | The 255 value enables the full ink colour mode and all the the palette entries are inks but the paper will be of the colour at position 128. | ||
Applies only to Enhanced ULA palette. Layer 2 and | Applies only to Enhanced ULA palette. Layer 2, Sprite and Tilemap palettes work as "full ink" or specifically to 4-bit graphics data. | ||
Revision as of 18:58, 31 January 2019
| Number | TBRegisterNumber::$42 |
|---|---|
| Readable | TBRegisterReadable::Yes |
| Writable | TBRegisterWritable::Yes |
| Short Description | ShortDesc::Specifies mask to extract ink colour from attribute cell value in ULANext mode. |
Bits 7-0 = Number of the last ink colour entry in palette (15 after a Reset).
This number can be 1, 3, 7, 15, 31, 63, 127 or 255. The HW behaviour for other values is unpredictable.
The 255 value enables the full ink colour mode and all the the palette entries are inks but the paper will be of the colour at position 128.
Applies only to Enhanced ULA palette. Layer 2, Sprite and Tilemap palettes work as "full ink" or specifically to 4-bit graphics data.