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9<title>OSGetMEM2ArenaHi</title>
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13
14<h1>OSGetMEM2ArenaHi</h1>
15
16<h2>Syntax</h2>
17<dl><dd><pre class="construction">
18#include &lt;revolution/os.h&gt;
19
20void* OSGetMEM2ArenaHi(void);
21</pre></dd></dl>
22
23<h2>Arguments</h2>
24<p>None.</p>
25
26<h2>Return Values</h2>
27<p>The upper boundary of the arena.</p>
28
29<H2>Description</H2>
30<P>Gets the upper boundary of the arena in external main memory (MEM2 area).</P>
31
32<P><STRONG>Note:</STRONG>More than 12MB of the last half of the external main memory (MEM2 region) is reserved as a system work area for all device drivers. This memory region is already deducted from the address returned when <code>OSGetMEM2ArenaHi</code> is called during initial status. The size of reserved memory may change in the future.<P>
33
34<h2>See Also</h2>
35<P class="reference">
36<a href="../toc.html#Arena" target="contents">Arena Functions</a>,
37<a href="OSGetMEM2ArenaLo.html">OSGetMEM2ArenaLo</a>,
38<a href="OSSetMEM2ArenaHi.html">OSSetMEM2ArenaHi</a>,
39<a href="OSSetMEM2ArenaLo.html">OSSetMEM2ArenaLo</a>,
40<a href="OSGetMEM1ArenaHi.html">OSGetMEM1ArenaHi</a>,
41<a href="OSGetMEM1ArenaLo.html">OSGetMEM1ArenaLo</a>,
42<a href="OSSetMEM1ArenaHi.html">OSSetMEM1ArenaHi</a>,
43<a href="OSSetMEM1ArenaLo.html">OSSetMEM1ArenaLo</a>
44</p>
45
46<h2>Revision History</h2>
47<P>
482006/06/16 Added notes regarding reserved memory.<BR>2006/03/01 Initial version.<br>
49</P>
50
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