Table 51

+=====-========-========-========-========-========-========-========-========+  
|  Bit|   7    |   6    |   5    |   4    |   3    |   2    |   1    |   0    | 
|Byte |        |        |        |        |        |        |        |        | 
|=====+=======================================================================| 
| 0   |                           Operation code (4Dh)                        | 
|-----+-----------------------------------------------------------------------| 
| 1   | Logical unit number      |         Reserved         |  PPC   |    SP  | 
|-----+-----------------------------------------------------------------------| 
| 2   |        PC        |        Page code                                   | 
|-----+-----------------------------------------------------------------------| 
| 3   |                           Reserved                                    | 
|-----+-----------------------------------------------------------------------| 
| 4   |                           Reserved                                    | 
|-----+-----------------------------------------------------------------------| 
| 5   | (MSB)                                                                 | 
|-----+---                        Parameter pointer                        ---| 
| 6   |                                                                 (LSB) | 
|-----+-----------------------------------------------------------------------| 
| 7   | (MSB)                                                                 | 
|-----+---                        Allocation length                        ---| 
| 8   |                                                                 (LSB) | 
|-----+-----------------------------------------------------------------------| 
| 9   |                           Control                                     | 
+=============================================================================+