+=============-============================-============================+ | CD-ROM | User data field contents | Auxiliary field contents | | mode | (2 048 bytes) | (288 bytes) | |-------------+----------------------------+----------------------------| | 00h | All bytes zero | All bytes zero | | 01h | User data | L-EC symbols | | 02h | User data | User data | | 03h - FFh | Reserved | Reserved | +=======================================================================+