What are the two source code samples in the disk used for

Source code samples are reference for you to write your own firmware. “TakioApp_Simulate_FAT800_PSC00007” is for FAT810 series and it implements the communication protocol of FAT800 terminal, such as TCP communication, I/O controls, etc. “TakioApp_Payment_FAT810W_PSC00008” is for the model “FAT810W” only and it is a demo that shows off-line read/write function of Mifare card.