INSTALLATIONS
FDD1: Floppy Drive Connector
FDD1 is a
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| Signal Name | Pin # | Pin # |
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| Signal Name |
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| Ground | 1 | 2 |
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| RM/LC |
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| Ground | 3 | 4 |
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| No connect |
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| Ground | 5 | 6 |
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| No connect |
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| Ground | 7 | 8 |
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| Index |
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| Ground | 9 | 10 |
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| Motor enable 0 |
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| Ground | 11 | 12 |
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| Drive select 1 |
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| Ground | 13 | 14 |
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| Drive select 0 |
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| Ground | 15 | 16 |
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| Motor enable 1 |
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| Ground | 17 | 18 |
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| Direction |
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| Ground | 19 | 20 |
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| Step |
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| Ground | 21 | 22 |
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| Write data |
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| Ground | 23 | 24 |
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| Write gate |
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| Ground | 25 | 26 |
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| Track 00 |
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FDD1 |
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| Ground | 27 | 28 |
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| Write protect |
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| Ground | 29 | 30 |
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| Read data |
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| Ground | 31 | 32 |
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| Side 1 select |
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| Ground | 33 | 34 |
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| Diskette change |
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CN1: ATX 12V/+12V Power Connector
Pin # | Signal Name |
1 | Ground |
2 | Ground |
3 | +12V |
4 | +12V |
CN2, CN3: USB Connectors
The following table shows the pin outs of the USB pin headers connectors. Overall, the two pin headers support four USB ports.
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| Signal Name |
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| Signal Name |
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| Vcc |
| 1 |
| 5 |
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| Ground |
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| USB0- |
| 2 |
| 6 |
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| USB1+ |
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| USB0+ |
| 3 |
| 7 |
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| USB1- |
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| CN2 |
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| Ground |
| 4 |
| 8 |
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| Vcc |
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IB850 User’s Manual | 21 |
