# CTRDG_VerifyAgbSramAsync

## Syntax

      #include <nitro/ctrdg.h>

      void CTRDG_VerifyAgbSramAsync(u32 tgt, const void* src, u32 size, CTRDG_TASK_FUNC callback);

## Arguments

tgt | Pointer to the SRAM address to be verified (data to be written, address in the AGB memory map).
src | Pointer to the verification source work area address (original data).
size | Size of data verified in bytes.
callback | Callback function called when verify processing ends.

## Return Values

None.

## Description

Asynchronously verifies data of the size given by size from the address in the work area given by src against the data at the address given by tgt in SRAM.
You can find out whether the verify process succeeded by accessing the result member of the `CTRDGTaskInfo` structure used as an argument to the callback function that returns after this routine is called.
It returns zero if the verify process succeeded, non-zero if the process failed, and the error address on the device side if the verify process resulted in an error.

The access cycle setting is created in the function and does not need to be set in advance.

Note: The cartridge bus is locked for a set period by this function.
Note that the AGB backup device cannot be accessed normally with IS-NITRO-DEBUGGER version 1.66 or earlier.

## See Also

`CTRDG_VerifyAgbSram`

## Revision History

2006/05/25 Added a description that the AGB backup device cannot be accessed normally with IS-NITRO-DEBUGGER version 1.66 or earlier.
2006/04/07 Initial version.

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