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	<id>https://newgrf-specs.tt-wiki.net/index.php?action=history&amp;feed=atom&amp;title=Talk%3ACallbacks</id>
	<title>Talk:Callbacks - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://newgrf-specs.tt-wiki.net/index.php?action=history&amp;feed=atom&amp;title=Talk%3ACallbacks"/>
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	<updated>2026-04-24T07:11:50Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
	<generator>MediaWiki 1.43.8</generator>
	<entry>
		<id>https://newgrf-specs.tt-wiki.net/index.php?title=Talk:Callbacks&amp;diff=3462&amp;oldid=prev</id>
		<title>Gesia at 11:44, 19 October 2013</title>
		<link rel="alternate" type="text/html" href="https://newgrf-specs.tt-wiki.net/index.php?title=Talk:Callbacks&amp;diff=3462&amp;oldid=prev"/>
		<updated>2013-10-19T11:44:50Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 11:44, 19 October 2013&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;
  &lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 16:&lt;/td&gt;
  &lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 16:&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;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;&quot;&gt;&lt;br /&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;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;&quot;&gt;&lt;br /&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;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;&quot;&gt;&lt;div&gt;Testing callbacks with type 81 was deprecated 2005 or 2006. It should no longer be used. It only still works because new callback IDs were assigned in a way, so that old NewGRF do not break. That&#039;s the reason why there is a gap from 3E to 13F.&lt;/div&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;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;&quot;&gt;&lt;div&gt;Testing callbacks with type 81 was deprecated 2005 or 2006. It should no longer be used. It only still works because new callback IDs were assigned in a way, so that old NewGRF do not break. That&#039;s the reason why there is a gap from 3E to 13F.&lt;/div&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
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  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;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;&quot;&gt;&lt;br /&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
  &lt;td colspan=&quot;2&quot; class=&quot;diff-empty diff-side-deleted&quot;&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;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;&quot;&gt;&lt;div&gt;--[[User:Gesia|Gesia]] ([[User talk:Gesia|talk]]) 11:44, 19 October 2013 (UTC)&lt;/div&gt;&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;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;&quot;&gt;&lt;br /&gt;&lt;/td&gt;
&lt;/tr&gt;
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  &lt;td colspan=&quot;2&quot; class=&quot;diff-empty diff-side-deleted&quot;&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;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;&quot;&gt;&lt;div&gt;How smart of me to point out my own mistakes as somebody elses, isn&#039;t it? Seriously though: sorry, that was pretty stupid.&lt;/div&gt;&lt;/td&gt;
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  &lt;td colspan=&quot;2&quot; class=&quot;diff-empty diff-side-deleted&quot;&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;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;&quot;&gt;&lt;div&gt;After having a closer look it seems to me that several well known NewGRFs actually use type 81. Hence, I took the liberty of adding your answer (in slightly modified form) to the introduction.&lt;/div&gt;&lt;/td&gt;
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&lt;/table&gt;</summary>
		<author><name>Gesia</name></author>
	</entry>
	<entry>
		<id>https://newgrf-specs.tt-wiki.net/index.php?title=Talk:Callbacks&amp;diff=3460&amp;oldid=prev</id>
		<title>Frosch: answer</title>
		<link rel="alternate" type="text/html" href="https://newgrf-specs.tt-wiki.net/index.php?title=Talk:Callbacks&amp;diff=3460&amp;oldid=prev"/>
		<updated>2013-10-18T18:06:10Z</updated>

		<summary type="html">&lt;p&gt;answer&lt;/p&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 18:06, 18 October 2013&lt;/td&gt;
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  &lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 11:&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;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;&quot;&gt;&lt;br /&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;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;&quot;&gt;&lt;div&gt;I&#039;m guessing some relevant information is still missing?&lt;/div&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;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;&quot;&gt;&lt;div&gt;I&#039;m guessing some relevant information is still missing?&lt;/div&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
  &lt;td colspan=&quot;2&quot; class=&quot;diff-empty diff-side-deleted&quot;&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;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;&quot;&gt;&lt;br /&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
  &lt;td colspan=&quot;2&quot; class=&quot;diff-empty diff-side-deleted&quot;&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;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;&quot;&gt;&lt;div&gt;--[[User:Frosch|Frosch]] ([[User talk:Frosch|talk]]) 18:06, 18 October 2013 (UTC)&lt;/div&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
  &lt;td colspan=&quot;2&quot; class=&quot;diff-empty diff-side-deleted&quot;&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;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;&quot;&gt;&lt;div&gt;1C was wrong, I copied that from your example :p It&#039;s in fact 0C.&lt;/div&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
  &lt;td colspan=&quot;2&quot; class=&quot;diff-empty diff-side-deleted&quot;&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;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;&quot;&gt;&lt;br /&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
  &lt;td colspan=&quot;2&quot; class=&quot;diff-empty diff-side-deleted&quot;&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;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;&quot;&gt;&lt;div&gt;Testing callbacks with type 81 was deprecated 2005 or 2006. It should no longer be used. It only still works because new callback IDs were assigned in a way, so that old NewGRF do not break. That&#039;s the reason why there is a gap from 3E to 13F.&lt;/div&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Frosch</name></author>
	</entry>
	<entry>
		<id>https://newgrf-specs.tt-wiki.net/index.php?title=Talk:Callbacks&amp;diff=3452&amp;oldid=prev</id>
		<title>Gesia: Discussion started for &quot;callbacks&quot;</title>
		<link rel="alternate" type="text/html" href="https://newgrf-specs.tt-wiki.net/index.php?title=Talk:Callbacks&amp;diff=3452&amp;oldid=prev"/>
		<updated>2013-10-17T21:48:38Z</updated>

		<summary type="html">&lt;p&gt;Discussion started for &amp;quot;callbacks&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;--[[User:Gesia|Gesia]] ([[User talk:Gesia|talk]]) 21:48, 17 October 2013 (UTC)&lt;br /&gt;
&lt;br /&gt;
The new introduction states that variable 1C is a word and therefore type 85 must be used. &lt;br /&gt;
&lt;br /&gt;
However, the paragraph below mentions variable 0C and some GRFs (e.g. Ikarus 6) use type 81, which seems to work ingame:&lt;br /&gt;
&lt;br /&gt;
   81 * 9	 02 01 02 01 01 00 00 00 00&lt;br /&gt;
   82 * 14	 02 01 10 &amp;#039;&amp;#039;&amp;#039;&amp;#039;&amp;#039;81 0C&amp;#039;&amp;#039;&amp;#039;&amp;#039;&amp;#039; 00 FF 01 02 FF 23 23 02 00&lt;br /&gt;
   83 * 7	 00 01 01 01 02 0E FF&lt;br /&gt;
   84 * 10	 03 01 01 02 01 FF 10 00 A1 00&lt;br /&gt;
&lt;br /&gt;
I&amp;#039;m guessing some relevant information is still missing?&lt;/div&gt;</summary>
		<author><name>Gesia</name></author>
	</entry>
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