Table 161

+==============-==============================================================+ 
| Bit 7 6 5 4  |  Description of pin 4 use                                    | 
|--------------+--------------------------------------------------------------| 
|     P 0 0 0  |  Open                                                        | 
|     P 0 0 1  |  In use                                                      | 
|     P 0 1 0  |  Eject                                                       | 
|     P 0 1 1  |  Head load                                                   | 
|-----------------------------------------------------------------------------| 
|  NOTES                                                                      | 
|   1  P is a polarity bit, where 0 is active low and 1 is active high.       | 
|   2  All undefined values are reserved.                                     | 
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