https://wiki.specnext.dev/index.php?action=history&feed=atom&title=Sprite_Transparency_Index_Register 2026-05-09T07:59:04Z Revision history for this page on the wiki MediaWiki 1.43.5 https://wiki.specnext.dev/index.php?title=Sprite_Transparency_Index_Register&diff=41228&oldid=prev 2025-10-14T11:12:20Z

<p>Xalior moved page <a href="/Sprites_Transparency_Index_Register" class="mw-redirect" title="Sprites Transparency Index Register">Sprites Transparency Index Register</a> to <a href="/Sprite_Transparency_Index_Register" title="Sprite Transparency Index Register">Sprite Transparency Index Register</a>: match formal nextreg.txt name</p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en-GB"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 12:12, 14 October 2025</td> </tr><tr><td colspan="4" class="diff-notice" lang="en-GB"><div class="mw-diff-empty">(No difference)</div> </td></tr> <!-- diff cache key specnext_wiki:diff:1.41:old-821:rev-41228 --> </table>

Xalior https://wiki.specnext.dev/index.php?title=Sprite_Transparency_Index_Register&diff=821&oldid=prev 2019-04-14T10:00:22Z

<p>2 revisions imported</p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <tr class="diff-title" lang="en-GB"> <td colspan="1" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="1" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 11:00, 14 April 2019</td> </tr><tr><td colspan="2" class="diff-notice" lang="en-GB"><div class="mw-diff-empty">(No difference)</div> </td></tr></table>

Specnext https://wiki.specnext.dev/index.php?title=Sprite_Transparency_Index_Register&diff=820&oldid=prev 2018-12-21T12:34:53Z

<p>Added extra info about 4-bit transparency from forum post.</p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en-GB"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 13:34, 21 December 2018</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l8">Line 8:</td> <td colspan="2" class="diff-lineno">Line 8:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>When rendering sprites, the pixel index is compared before palette-offset (byte 3 of {{PortNo|$xx57}}) is applied to it. The transparency is index-based, not colour based (contrary to Layer 2/ULA/LoRes modes, where resulting pixel colour is compared).</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>When rendering sprites, the pixel index is compared before palette-offset (byte 3 of {{PortNo|$xx57}}) 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).</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">The 4-bit sprite compares pixel-index to low 4 bits of this register, i.e. 4-bit pixel $3 (%0011) is treated as transparent, if this register still contains default $E3 (%1110_0011) value.</ins></div></td></tr> </table>

wiki>Ped7g https://wiki.specnext.dev/index.php?title=Sprite_Transparency_Index_Register&diff=819&oldid=prev 2018-12-21T01:41:35Z

<p>Created page with &quot;{{NextRegister |Number=$4B |Readable=Yes |Writable=Yes |ShortDesc=Index into sprite palette (of &quot;transparent&quot; colour). }} Index into sprite palette, set to $E3 after reset....&quot;</p> <p><b>New page</b></p><div>{{NextRegister<br /> |Number=$4B<br /> |Readable=Yes<br /> |Writable=Yes<br /> |ShortDesc=Index into sprite palette (of &quot;transparent&quot; colour).<br /> }}<br /> Index into sprite palette, set to $E3 after reset.<br /> <br /> When rendering sprites, the pixel index is compared before palette-offset (byte 3 of {{PortNo|$xx57}}) 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).</div>

wiki>Ped7g