Sprites Transparency Index Register
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Revision as of 02:41, 21 December 2018 by wiki>Ped7g (Created page with "{{NextRegister |Number=$4B |Readable=Yes |Writable=Yes |ShortDesc=Index into sprite palette (of "transparent" colour). }} Index into sprite palette, set to $E3 after reset....")
| Number | $4B |
|---|---|
| Readable | Yes |
| Writable | Yes |
| Short Description | Index into sprite palette (of "transparent" colour). |
Index into sprite palette, set to $E3 after reset.
When rendering sprites, the pixel index is compared before palette-offset (byte 3 of Sprite Attribute Upload ($xx57 / 87)) is applied to it. The transparency is index-based, not colour based (contrary to Layer 2/ULA/LoRes modes, where resulting pixel colour is compared).