Table 160

+==============-==============================================================+
| Bit 7 6 5 4  |  Description of pin 34 use                                   |
|--------------+--------------------------------------------------------------|
|     P 0 0 0  |  Open                                                        |
|     P 0 0 1  |  Ready                                                       |
|     P 0 1 0  |  Disk changed                                                |
|-----------------------------------------------------------------------------|
|  NOTES                                                                      |
|   1  P is a polarity bit, where 0 is active low and 1 is active high.       |
|   2  All undefined values are reserved.                                     |
+=============================================================================+