Cisco 7000 Series Hardware Installation And Maintenance Manual page 174

Installing and Configuring Processor Modules
Bit 14
in
in
Bits 11 and 12 in the configuration register determine the console port baud rate. Table 5-3 shows
the bit settings for the four available baud rates. (The factory default is 9600.)
Table 5-3
Baud
9600
4800
1200
2400
Bit 13 in the configuration register determines the system's response to a boot-load failure. Setting
bit 13 causes the system to load operating software from ROM after five unsuccessful attempts to
load a boot file from the network. Clearing bit 13 causes the system to continue attempting to load
a boot file from the network indefinitely. By factory default, bit 13 is cleared to 0.
Bit 14 in the configuration register controls the network and subnet portions of the Internet broadcast
address. Setting bit 14 causes the system to include the network and subnet portions of its address in
the broadcast address. Clearing bit 14 causes the system to set the entire broadcast address to all ones
or all zeros, depending on the setting of bit 10. By factory default, bit 14 is cleared to 0. See Table 5-2
for the combined effect of bits 10 and 14.
Bit 15 in the configuration register controls factory diagnostic mode in the system. Setting bit 15
causes the system to produce detailed CPU self-check messages, to automatically prompt for
interface addresses (not look for addresses on the network), to not read configuration files or
nonvolatile memory, and to automatically set to diagnostic tracing modes using the debug
commands. Clearing bit 15 (the factory default) causes the system to operate normally.
Bits 16 through 18 are not used and should remain cleared.
Bit 19 disables the fast page burst mode from the DRAM to the MC68EC040 processor.
Bits 20 through 23 (the four pairs of pins on the far left of the 50-pin header) are not used in normal
operation; however, they can be used to invoke the cache disable, processor halt, external reset, and
slave mode functions. (See Figure 5-6.)
Figure 5-6
19
20
21
22
23
24
5-16 Cisco 7010 Hardware Installation and Maintenance
Bit 10 Address (<net><host>)
in <net><zeros>
out <net><ones>
System Console Terminal Baud Rate Settings
Bit 12 Bit 11
0 0
0 1
1 0
1 1
Optional Configuration Register Settings
Bit 19 Burst mode disable
Bit 20 Cache disable
Bit 21 Processor halt
Bit 22 External reset
Bit 23 Slave mode
Bit 24 Not used (leave cleared)