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7<TITLE>CTRDG_IsOptionCartridge</TITLE>
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11<H1 align="left">CTRDG_IsOptionCartridge <IMG src="../image/NTR.gif" align="middle"></H1>
12<H2>Syntax</H2>
13<DL>
14  <DD>
15  <PRE><CODE>#include &lt;nitro/ctrdg.h&gt;</CODE></PRE>
16  <PRE><CODE>BOOL CTRDG_IsOptionCartridge( void );
17  </CODE></PRE>
18</DL>
19<H2>Arguments</H2>
20<P>None.</P>
21<H2>Return Values</H2>
22<P>Returns a value of TRUE if an Option Pak with peripherals is loaded; otherwise, returns a value of FALSE. Also, always returns <code>FALSE</code> after the Game Pak has been removed once.</P>
23<H2>Description</H2>
24<P>This function returns a BOOLEAN value to indicate if an Option Pak with peripherals is installed.</P>
25<P>However, this function will always return a value of FALSE after it detects the initial removal of an Option Pak. (This behavior is not limited to the Option Pak.) <br> This function can be called when the cartridge bus is locked with the <a href="../os/spinLock/OS_LockCartridge.html"><CODE>OS_LockCartridge</CODE></a> function. However, while the bus is locked, the ARM7 does not detect removal automatically, so call the <A href="CTRDG_IsExisting.html"><CODE>CTRDG_IsExisting</CODE></A> function at regular intervals, such as each game frame, during which the player cannot perform a re-insert operation. (This function internally calls the <A href="CTRDG_IsExisting.html"><CODE>CTRDG_IsExisting</CODE></A> function.)
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27
28<H2>See Also</H2>
29<P><A href="CTRDG_Init.html"><code>CTRDG_Init</code></A>, <A href="CTRDG_IsExisting.html"><code>CTRDG_IsExisting</code></A>, <A href="CTRDG_IsAgbCartridge.html"><code>CTRDG_IsAgbCartridge</code></A></P>
30<H2>Revision History</H2>
31<P>2005/04/12 Added description of cartridge bus lock.<br /> 2004/09/17 Initial version.                             </P>
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