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		<title>83Plus:BCALLs:4600 - Revision history</title>
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		<id>https://wikiti.brandonw.net/index.php?title=83Plus:BCALLs:4600&amp;diff=5487&amp;oldid=prev</id>
		<title>Brandonw at 01:23, 6 November 2006</title>
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				<updated>2006-11-06T01:23:44Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;[[Category:83Plus:BCALLs:By Name|PrevContext]]&lt;br /&gt;
[[Category:83Plus:BCALLs:By Address|4600 - PrevContext]]&lt;br /&gt;
== Synopsis ==&lt;br /&gt;
'''Unofficial Name:''' PrevContext&lt;br /&gt;
&lt;br /&gt;
'''BCALL Address:''' 4600&lt;br /&gt;
&lt;br /&gt;
Sets up memory to switch to the previous context (essentially copying cxPrev to cxMain), if possible.&lt;br /&gt;
&lt;br /&gt;
=== Inputs ===&lt;br /&gt;
* None&lt;br /&gt;
&lt;br /&gt;
=== Outputs ===&lt;br /&gt;
* [[83Plus:RAM:859B|cxPrev]] vectors copied over [[83Plus:RAM:858D|cxMain]] vectors&lt;br /&gt;
&lt;br /&gt;
=== Destroys ===&lt;br /&gt;
* Unknown&lt;br /&gt;
&lt;br /&gt;
== Comments ==&lt;br /&gt;
This function considers split screen modes if grfSplitOverride,(iy+sGrFlags) is not set.&lt;br /&gt;
&lt;br /&gt;
This function immediately returns if ([[83Plus:RAM:859A|cxCurApp]]) is not 57h (FORMAT menu), 4Bh (TABLE SET editor), or 45h (MODE menu).&lt;br /&gt;
&lt;br /&gt;
The purpose of this function is unclear, but straightforward.&lt;br /&gt;
&lt;br /&gt;
== Example ==&lt;br /&gt;
 &amp;lt;nowiki&amp;gt; set grfSplitOverride,(iy+sGrFlags)&lt;br /&gt;
 B_CALL PrevContext&amp;lt;/nowiki&amp;gt;&lt;/div&gt;</summary>
		<author><name>Brandonw</name></author>	</entry>

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