Palette Value (8 bit colour) Register: Difference between revisions
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Rewording a bit and adding info from web docs. |
Fixing read/write vs index auto increment description, thanks to Garry help on Facebook to identify the mistake |
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After the write, the palette index is auto-incremented to the next index, if the auto-increment is enabled at {{NextRegNo|$43}}. | After the write, the palette index is auto-incremented to the next index, if the auto-increment is enabled at {{NextRegNo|$43}}. | ||
Read does not auto-increment the index, and reads always the top 8 bits of colour from palette, to read the 9th bit of colour, use {{NextRegNo|$44}} in tandem with value from this register. | |||
The modified palette remains until a Hard Reset. | The modified palette remains until a Hard Reset. | ||
Revision as of 23:31, 6 January 2019
| Next Register Number | $41 |
|---|---|
| Readable | Yes |
| Writable | Yes |
| Short Description | Use to set/read 8-bit colours of the ULANext palette. |
Bits 7-0 = Eight bit colour for the palette index selected by the NextReg:$40.
Format is RRRGGGBB - Note the lowest blue bit of colour (ninth bit) will be set to an OR between bit 1 and bit 0.
After the write, the palette index is auto-incremented to the next index, if the auto-increment is enabled at NextReg:$43.
Read does not auto-increment the index, and reads always the top 8 bits of colour from palette, to read the 9th bit of colour, use NextReg:$44 in tandem with value from this register.
The modified palette remains until a Hard Reset.