Maintenance
Troubleshooting
Virtual Configuration Register Settings
Bit 8 controls the console Break key. Setting bit 8 (the factory default) causes the processor to ignore the console Break key. Clearing bit 8 causes the processor to interpret the Break key as a command to force the system into the bootstrap monitor, thereby halting normal operation. A break can be sent in the first 60 seconds while the system reboots, regardless of the configuration settings.
Bit 10 controls the host portion of the IP broadcast address. Setting bit 10 causes the processor to use all zeros; clearing bit 10 (the factory default) causes the processor to use all ones. Bit 10 interacts with bit 14, which controls the network and subnet portions of the broadcast address. (See table
Table | Configuration Register Settings for Broadcast Address Destination | ||
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Bit 14 | Bit 10 | Address (<net> <host>) | |
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Off | Off | <ones> <ones> | |
Off | On | <zeros> <zeros> | |
On | On | <net> <zeros> | |
On | Off | <net> <ones> | |
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Bits 11 and 12 in the configuration register determine the baud rate of the console terminal.
Table
Table | System Console Terminal Baud Rate Settings | ||
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Baud | Bit 12 | Bit 11 | |
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9600 | 0 | 0 |
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4800 | 0 | 1 |
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1200 | 1 | 0 |
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2400 | 1 | 1 |
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Bit 13 determines the server response to a bootload failure. Setting bit 13 causes the server to load operating software from ROM after five unsuccessful attempts to load a boot file from the network. Clearing bit 13 causes the server to continue attempting to load a boot file from the network indefinitely. The default setting for bit 13 is 1.