Palette Value (8 bit colour) Register: Difference between revisions
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m Xalior moved page Palette Value Register to Palette Value (8 bit colour) Register: match formal nextreg.txt name |
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{{NextRegister | {{NextRegister | ||
|Number=$41 | |Number=$41 | ||
|Readable= | |Readable=Yes | ||
|Writable=Yes | |Writable=Yes | ||
|ShortDesc= | |ShortDesc=Use to set/read 8-bit colours of the ULANext palette. | ||
}} | }} | ||
Bits 7-0 = Eight bit colour for the palette index selected by the {{NextRegNo|$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 {{NextRegNo|$43}}. And also the index of {{NextRegNo|$44}} is reset, so the next write there will be considered as first byte of colour. | |||
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. | |||
Latest revision as of 10:57, 14 October 2025
| Number | TBRegisterNumber::$41 |
|---|---|
| Readable | TBRegisterReadable::Yes |
| Writable | TBRegisterWritable::Yes |
| Short Description | ShortDesc::Use to set/read 8-bit colours of the ULANext palette. |
Bits 7-0 = Eight bit colour for the palette index selected by the {{#ask: TBRegisterNumber::$40 }} ($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 {{#ask: TBRegisterNumber::$43 }} ($43). And also the index of {{#ask: TBRegisterNumber::$44 }} ($44) is reset, so the next write there will be considered as first byte of colour.
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 {{#ask: TBRegisterNumber::$44 }} ($44) in tandem with value from this register.
The modified palette remains until a Hard Reset.