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| SYMPTOM | POSSIBLE REMEDY |
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| My system locks up | • The driver might be set to hardware |
| when exiting my | flow control and the external cable may |
| communication | not be wired correctly. Switch to |
| program. | software flow control. If the problem |
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| stops, then the cable is wired incorrectly, |
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| not allowing the external device to |
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| supply the necessary control signals. |
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| • Make sure that hardware flow control is |
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| set in your system. |
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| • Make sure the attached serial device is |
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| set to hardware flow control. |
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| EPP/ECP hard drive/ | • Ensure the device is connected properly. |
| Most EPP devices have two | |
| does not function. | connectors labelled “COMPUTER” and |
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| “PRINTER”. The first device should be |
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| connected to the |
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| “COMPUTER”. The next device(s) |
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| should be connected to the |
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| connector labelled “PRINTER” on the |
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| first device. |
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| • If a printer is required, it should be |
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| connected to the |
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| labelled “PRINTER” on the last device. |
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| • Ensure that the driver for each device is |
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| installed and configured correctly. Note: |
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| the driver for each device is supplied by |
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| the vendor of that device. |
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| • Make sure that the ECP printer port has |
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| an IRQ assigned for EPP mode, or both |
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| an IRQ and DMA for ECP mode. |
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