Specifications

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OL-4923-01 B0
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. Regardless of the setting of the
break enable bit, a break causes a return to the ROM monitor during the first few seconds (approximately
5 seconds) of booting.
Bit 9 is unused. 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.
Table 21 shows the combined effect of bits 10 and 14.
Bits 11 and 12 in the configuration register determine the baud rate of the console terminal. Table 22
shows the bit settings for the four available baud rates. (The factory-set default baud rate is 9600.)
cisco7-RSP 0111
cisco10-RSP 1000
cisco11-RSP 1001
cisco12-RSP 1010
cisco13-RSP 1011
cisco14-RSP 1100
cisco15-RSP 1101
cisco16-RSP 1110
cisco17-RSP 1111
Table 20 Default Boot Filenames (Continued)
Action/Filename Bit 3 Bit 2 Bit 1 Bit 0
Table 21 Configuration Register Settings for Broadcast Address Destination
Bit 14 Bit 10 Address (<net> <host>)
Off Off <ones> <ones>
Off On <zeros> <zeros>
On On <net> <zeros>
On Off <net> <ones>
Table 22 System Console Terminal Baud Rate Settings
Baud Bit 12 Bit 11
9600 0 0
4800 0 1
1200 1 0
2400 1 1