Table 171

+=====-========-========-========-========-========-========-========-========+ 
|  Bit|   7    |   6    |   5    |   4    |   3    |   2    |   1    |   0    | 
|Byte |        |        |        |        |        |        |        |        | 
|=====+========+========+=====================================================| 
| 0   |   PS   |Reserved|         Page code (04h)                             | 
|-----+-----------------------------------------------------------------------| 
| 1   |                           Page length (16h)                           | 
|-----+-----------------------------------------------------------------------| 
| 2   | (MSB)                                                                 | 
|- - -+---                        Number of cylinders                      ---| 
| 4   |                                                                 (LSB) | 
|-----+-----------------------------------------------------------------------| 
| 5   |                           Number of heads                             | 
|-----+-----------------------------------------------------------------------| 
| 6   | (MSB)                                                                 | 
|- - -+---               Starting cylinder-write precompensation           ---| 
| 8   |                                                                 (LSB) | 
|-----+-----------------------------------------------------------------------| 
| 9   | (MSB)                                                                 | 
|- - -+---               Starting cylinder-reduced write current           ---| 
| 11  |                                                                 (LSB) | 
|-----+-----------------------------------------------------------------------| 
| 12  | (MSB)                                                                 | 
|-----+---                        Drive step rate                          ---| 
| 13  |                                                                 (LSB) | 
|-----+-----------------------------------------------------------------------| 
| 14  | (MSB)                                                                 | 
|- - -+---                        Landing zone cylinder                    ---| 
| 16  |                                                                 (LSB) | 
|-----+-----------------------------------------------------------------------| 
| 17  |                           Reserved                  |       RPL       | 
|-----+-----------------------------------------------------------------------| 
| 18  |                           Rotational offset                           | 
|-----+-----------------------------------------------------------------------| 
| 19  |                           Reserved                                    | 
|-----+-----------------------------------------------------------------------| 
| 20  | (MSB)                                                                 | 
|-----+---                        Medium rotation rate                     ---| 
| 21  |                                                                 (LSB) | 
|-----+-----------------------------------------------------------------------| 
| 22  |                           Reserved                                    | 
|-----+-----------------------------------------------------------------------| 
| 23  |                           Reserved                                    | 
+=============================================================================+