+=============-===============================================================+ | Value | Message format | |-------------+---------------------------------------------------------------| | 00h | One-byte message (COMMAND COMPLETE) | | 01h | Extended messages | | 02h - 1Fh | One-byte messages | | 20h - 2Fh | Two-byte messages | | 30h - 7Fh | Reserved | | 80h - FFh | One-byte message (IDENTIFY) | +=============================================================================+