Global Transparency Colour Register: Difference between revisions
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m Xalior moved page Global Transparency Register to Global Transparency Colour Register: match formal nextreg.txt name |
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Latest revision as of 17:25, 13 October 2025
| Next Register Number | $14 |
|---|---|
| Readable | Yes |
| Writable | Yes |
| Short Description | Sets the "transparent" colour for Layer 2, ULA and LoRes pixel data. |
Transparency color value (0xE3 after a reset).
This value is 8-bit only, so the transparency is compared only by the MSB bits of the final colour.
This only affects Layer 2, ULA, LoRes and 1-bit ("text mode") tilemap. Sprites use NextReg:$4B for transparency, 4-bit Tilemap uses NextReg:$4C except in text mode.