# CTRDG_IsAgbCartridge

## C Specification

      #include <nitro/ctrdg.h>

      BOOL IsAgbCartridge( void );

## Arguments

None.

## Return Values

Returns a value of TRUE if there is an AGB Game Pak. Otherwise, it returns a value of FALSE. Also, always returns `FALSE` after the Game Pak has been removed once.

## Description

This function returns a BOOLEAN value to indicate if an AGB Game Pak is present.

However, this function will always return a value of FALSE after detecting the initial removal of a Game Pak. (This behavior is not limited to the AGB Game Pak.) This function can be called when the cartridge bus is locked with the `OS_LockCartridge` function. However, when the bus is locked, the ARM7 will not perform automatic release detection processing, and thus you should periodically call `CTRDG_IsExisting` each game frame or other interval when the player cannot reinsert. (This function internally calls `CTRDG_IsExisting`.)

## See Also

`CTRDG_Init`, `CTRDG_IsExisting`, `CTRDG_IsOptionCartridge`

## Revision History

04/12/2005 Added description of cartridge bus lock
09/17/2004 Initial version