Changes

==Checksum==

==Checksum==

The algorithm used to verify the integrity of the database is based on [http://srecord.sourceforge.net/crc16-ccitt.html CRC16-CCITT], though it's an incorrect implementation. It is the same algorithm used to verify [http://wiibrew.org/wiki/Mii_Data#Block_format Mii Data on the Wii].

The algorithm used to verify the integrity of the database is based on CRC-16/XMODEM. It is the same algorithm used to verify [http://wiibrew.org/wiki/Mii_Data#Block_format Mii Data on the Wii].

To obtain the correct value for the checksum, apply the algorithm to the first 0xC81E bytes of the database. This can be done using [https://gbatemp.net/threads/tutorial-give-your-mii-gold-pants-and-use-it-for-streetpass.379146/page-24#post-6569186 FixCRC]; alternativly a pseudocode implementation of the checksum algorithm is given below:

To obtain the correct value for the checksum, apply the algorithm to the first 0xC81E bytes of the database. This can be done using [https://gbatemp.net/threads/tutorial-give-your-mii-gold-pants-and-use-it-for-streetpass.379146/page-24#post-6569186 FixCRC]; alternativly a pseudocode implementation of the checksum algorithm is given below:

<source lang="python">

<source lang="python">

def crc16_CCITTWii(u8[]: data) -> u16:

def crc16_CCITTWii(u8[]: data) -> u16:

     """Calculate a checksum of data using the CRC16-CCITT implementation of the Wii

     """Calculate a checksum of data using the CRC-16/XMODEM implementation

     This implementation uses 0x0000 as the starting value, which is different

     CRC-16/XMODEM implementation uses 0x0000 as the starting value

     """

     """

 

      

     # note: a correct implementation of CRC16-CCITT

     u32 crc := 0x0

     u32 crc := 0x0