Table 22

+======-========-========-========-========-========-========-========-========+ 
|   Bit|   7    |   6    |   5    |   4    |   3    |   2    |   1    |   0    | 
|Byte  |        |        |        |        |        |        |        |        | 
|======+=======================================================================| 
| 0    |                           Operation code                              | 
|------+-----------------------------------------------------------------------| 
| 1    |   Logical unit number    |                  Reserved                  | 
|------+-----------------------------------------------------------------------| 
| 2    | (MSB)                                                                 | 
|------+---                                                                 ---| 
| 3    |                                                                       | 
|------+---                        Logical block address (if required)      ---| 
| 4    |                                                                       | 
|------+---                                                                 ---| 
| 5    |                                                                 (LSB) | 
|------+-----------------------------------------------------------------------| 
| 6    |                           Reserved                                    | 
|------+-----------------------------------------------------------------------| 
| 7    | (MSB)                     Transfer length (if required)               | 
|------+---                        Parameter list length (if required)      ---| 
| 8    |                           Allocation length (if required)       (LSB) | 
|------+-----------------------------------------------------------------------| 
| 9    |                           Control                                     | 
+==============================================================================+