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|   | 4.3 | Entertainment Encryption/Decryption Driver | 34 | 
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|   |   |   |  | 36 | 
|  | 5 |  | 38 | 
|   | 5.1 | EWF | ................................................................................ | 38 | 
|   | 5.2 | HORM | 39 | 
|   | 5.3 | Advantech Utilities | 39 | 
|   |   | 5.3.1 | Version Information | 40 | 
|   |   | 5.3.2 | OSLock and OSUnLock | 40 | 
|   |   | 5.3.3 | HORM | 40 | 
| Appendix | A | Serial Port Settings | 44 | 
|   | A.1 | COM1/ COM2/ COM3 Connector Definition | 44 | 
|   | A.2 | COM4 Setting | 45 | 
| Appendix | B | Watchdog Timer | Programming | 48 | 
|   | B.1 | Overview | 48 | 
|   | B.2 | Watchdog Timer Programming | 49 | 
|   |   |   |  | 49 | 
|   | B.3 |   |  | 50 | 
|   | Example Programs | 51 | 
|  |  | 
|   | C.1 | DeviceIOControl | 58 | 
|   |   | C.1.1 | Parameters | 59 | 
|   | C.2 |  | 60 | 
|   |   | C.2.1 | IOCTL _WDT_ENABLE: | 60 |