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| Appendix D Defaults | ||
Page D - 4 |
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| Hardware Defaults | ||
Command | If you do nothing to change the board operation by using the available Board- | |||||
Defaults | control commands, the adapter uses defaults. These are listed below. For more | |||||
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| Command Parameters | Default Values | Meaning |
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| Identify - returned in the status block |
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| Engineering Revision | XX |
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| Firmware Revision | XX | Depends on revision. | ||
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| Day, Month, Year | XXXXXX |
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| Options Flags = 14H |
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| Tag | bit 2 = 1 | Tagged commands supported. | ||
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| Reset | bit 4 = 1 | SCSI bus will reset at adapter reset - set by | ||
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| SCSI ID | bits 0, 5, 6, 7 = 0 | Set by board jumper default settings. | ||
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| FW # of Even Prom | XXXXXXXX | Depends on revision. | ||
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| General Option - these are used if you set nothing yourself | ||||
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| Bus Throttle | 0BH | 2048 bytes per burst. | ||
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| Select Flags = 03H |
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| Disconnect/Reconnect | bit 0 = 1 | Allow Disconnect/Reconnect. | ||
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| SCS Bus Parity | bit 1 = 1 | Check for SCSI parity errors. | ||
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| Block Mode Transfers | bit 2 = 0 | Block Mode transfers depend on address | ||
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| Unit Options and Extended Unit Options - used if you set nothing | ||||
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| Disconnect Timeout | 0H | No timeout occurs | ||
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| Retry Limit | 0H | No retries enabled. | ||
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| Retry Control = 0H |
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| Issue Interrupt | bit 0 = 0 | No interrupt on retry. | ||
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| Issue Status Block | bit 1 = 0 | No Status Block on retry. | ||
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| Retry Parity Errors | bit 2 = 0 | No retry for parity errors. | ||
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| Retry Command Errors | bit 3 = 0 | No retry for device errors. | ||
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| Retry Bus Errors | bit 4 = 0 | No retry for bus errors. | ||
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| Select Timeout | FAH | 250 milliseconds. | ||
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| Unit Flags = 0H |
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| Untagged Queue | bit 0 = 0 | Send one command at a time. | ||
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| Synch Negotiation | bit 1 = 0 | Will not initiate synchronous negotiation. | ||
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| Inhibit ATN Signal | bit 2 = 0 | ATN will be asserted. | ||
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| Wide Transfers | bit 3 = 0 | Will not initiate wide negotiation. | ||
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| Tagged Commands | bit 6 = 0 | Tagged commands not negotiated. | ||
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| Sense Count | 08H | First eight bytes of Sense Data. | ||
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| Selected Sense Bytes | all = 0 | First eight bytes of Sense Data returned. | ||
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| Board Information - these are returned in a Data Structure | ||||
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| Select Flags = 03H |
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| Disconnect/Reconnect | bit 0 = 1 | Allow Disconnect/Reconnect. | ||
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| SCSI Bus Parity | bit 1 = 1 | Check for SCSI parity errors. | ||
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| Block Mode Transfers | bit 2 = 0 | Block Mode transfers depend on address | ||
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| Bus Throttle | 0BH | 2048 bytes per burst. | ||
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Table 127: Command Defaults
21020285 D | User’s Guide |