223cc6685e
git-svn-id: svn://svn.compuextreme.de/Viitor/V963/Viitor_cc65@5933 504e572c-2e33-0410-9681-be2bf7408885
46 lines
1.4 KiB
HTML
46 lines
1.4 KiB
HTML
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<TITLE>Commodore 64 specific information for cc65: Memory layout</TITLE>
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<H2><A NAME="s3">3.</A> <A HREF="c64.html#toc3">Memory layout</A></H2>
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<P>cc65 generated programs with the default setup run with the I/O area and the
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kernal ROM enabled (memory under the kernal may be used for graphics or as
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extended memory - see the sections about graphics and extended memory
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drivers). The BASIC ROM is disabled, which gives a usable memory range of
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$0800 - $CFFF. This means that kernal entry points may be called
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directly, but using the BASIC ROM is not possible without additional code.</P>
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<P>Special locations:</P>
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<P>
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<DL>
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<DT><B>Text screen</B><DD><P>The text screen is located at $400 (as in the standard setup).</P>
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<DT><B>Stack</B><DD><P>The C runtime stack is located at $CFFF and growing downwards.</P>
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<DT><B>Heap</B><DD><P>The C heap is located at the end of the program and grows towards the C
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runtime stack.</P>
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</DL>
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</P>
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