Reader Interface

The part supplementary data of error messages of the READ driver may contain following data:

•	data_address is the start address of data that are to be accessed expressed in the READ driver address notation

•	data_size is the size of data that are to be accessed expressed like a number of data bytes in decimal format.

•	direction (from the point of view of the terminal) is:

- "rcv" for transmitting data from the slave to the master

- "snd" for transmitting data from the master to the slave

•	status_code is the status code of the response in ASCII format

•	request_command is the command of the related request in ASCII format

The READ driver address notation for Barcode reader is like this:

The Read driver address notation for Magnetic card reader is like this:

The Read driver address notation for Chip card reader is like this:

<byte_offset>

•	gun is an unsigned number in decimal format

•	track is an unsigned number in decimal format

•	byte_offset is an unsigned number in decimal format