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56 lines
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56 lines
1.9 KiB
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<TITLE>cc65 function reference: Alphabetical function reference: em_copyfrom</TITLE>
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<H2><A NAME="em_copyfrom"></A> 3.48 <A HREF="funcref.html#toc3.48">em_copyfrom</A></H2>
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<P>
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<BLOCKQUOTE>
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<DL>
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<DT><B>Function</B><DD><P>Copy from extended into normal memory.</P>
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<DT><B>Header</B><DD><P><CODE>
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<A HREF="funcref-18.html#em.h">em.h</A></CODE></P>
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<DT><B>Declaration</B><DD><P><CODE>void __fastcall__ em_copyfrom (const struct em_copy* copy_data);</CODE></P>
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<DT><B>Description</B><DD><P>Copy data from extended memory into linear memory. Source and
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target addresses as well as the number of bytes to transfer are specified in
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the <CODE>em_copy</CODE> structure that is passed as a parameter.</P>
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<DT><B>Limits</B><DD><P>
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<UL>
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<LI>Calling <CODE>em_copyfrom</CODE> will invalidate the memory window, so if you
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made any changes to the data in the window, call <CODE>
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<A HREF="funcref-92.html#em_commit">em_commit</A></CODE> first, or the changes are lost.</LI>
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<LI>The function is only available as fastcall function, so it may only be
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used in presence of a prototype.</LI>
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<LI>The function produces undefined results if no extended memory driver is
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loaded.</LI>
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</UL>
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</P>
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<DT><B>Availability</B><DD><P>cc65</P>
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<DT><B>See also</B><DD><P>
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<A HREF="funcref-92.html#em_commit">em_commit</A>,
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<A HREF="funcref-94.html#em_copyto">em_copyto</A>,
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<A HREF="funcref-96.html#em_load_driver">em_load_driver</A></P>
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<DT><B>Example</B><DD><P>None.</P>
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</DL>
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</BLOCKQUOTE>
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