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| Appendix A. | Connector | pin | assignments | ||||
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Figure | 21 | (Page | 2 |
| of | 2). |
| IDE connector pin assignments |
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Pin |
| Signal |
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| I/O | Pin |
| Signal |
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| I/O |
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9 |
| Data | bus | bit | 4 |
| I/O | 29 |
| NC |
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| NA | ||
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10 |
| Data | bus | bit | 11 |
| I/O | 30 |
| Ground |
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| NA | ||
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11 |
| Data | bus | bit | 3 |
| I/O | 31 |
| IRQ |
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| I | ||
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12 |
| Data | bus | bit | 12 |
| I/O | 32 |
| CS16# |
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| I | ||
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13 |
| Data | bus | bit | 2 |
| I/O | 33 |
| SA1 |
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| O | ||
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14 |
| Data | bus | bit | 13 |
| I/O | 34 |
| PDIAG# |
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| I | ||
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15 |
| Data | bus | bit | 1 |
| I/O | 35 |
| SA0 |
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| O | ||
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16 |
| Data | bus | bit | 14 |
| I/O | 36 |
| SA2 |
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| O | ||
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17 |
| Data | bus | bit | 0 |
| I/O | 37 |
| CS0# |
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| O | ||
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18 |
| Data | bus | bit | 15 |
| I/O | 38 |
| CS1 |
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| O | ||
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19 |
| Ground |
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| NA | 39 |
| Active# |
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| I | ||
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20 |
| Key | (Reserved) |
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| NA | 40 |
| Ground |
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| NA | |||
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Diskette | drive | connector |
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Figure | 22. Diskette drive connector pin assignments |
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Pin |
| Signal |
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| I/O | Pin |
| Signal |
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| I/O |
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1 |
| Drive | 2 installed # | I | 2 |
| High | density | select | O | |||||||
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3 |
| Not | connected |
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| NA | 4 |
| Not connected |
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| NA | |||||
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5 |
| Ground |
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| NA | 6 |
| Data | rate 0 |
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| NA | ||
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7 |
| Ground |
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| NA | 8 |
| Index# |
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| I | ||
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9 |
| Reserved |
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| NA | 10 |
| Motor | enable | 0# |
| O | ||||
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11 |
| Ground |
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| NA | 12 |
| Drive | select | 1# |
| O | ||
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13 |
| Ground |
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| NA | 14 |
| Drive | select | 0# |
| O | ||
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15 |
| Ground |
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| NA | 16 |
| Motor | enable | 1# |
| O | ||
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17 |
| MSEN1 |
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| I | 18 |
| Direction | in# |
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| O | |
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19 |
| Ground |
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| NA | 20 |
| Step# |
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| O | |
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21 |
| Ground |
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| NA | 22 |
| Write | data# |
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| O | ||
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23 |
| Ground |
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| NA | 24 |
| Write | enable# |
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| O | ||
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25 |
| Ground |
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| NA | 26 |
| Track0# |
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27 |
| MSEN0 |
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| I | 28 |
| Write | protect# |
| I | ||
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29 |
| Ground |
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| NA | 30 |
| Read | data# |
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| I | ||
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31 |
| Ground |
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| NA | 32 |
| Head | 1 | select# |
| O | ||
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33 |
| Data | rate | 1 |
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| NA | 34 |
| Diskette | change# |
| I | ||||
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Power supply | connector |
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Figure | 23 | (Page | 1 |
| of | 2). |
| Power supply connector pin assignments |
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Pin |
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| Signal name |
| Pin |
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| Signal | name |
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1 |
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| +3.3 | V |
| 11 |
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| +3.3 | V | |||
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2 |
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| +3.3 | V |
| 12 |
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| −12 V |
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Appendix A. Connector pin assignments31
