2.5.5. System information block

In the top sector of the flash memory on the baseboard is a System Information Block (SIB) that holds the board-specific setup values. On the Integrator, the SIB is primarily used to store clock frequencies and program them when images are executed. If the program switches are set to run from boot monitor (S1[1]=ON and S1[4]=OFF), the clock speeds will be set from the SIB.

By default, the Integrator/CP powers up with a set of frequencies that are suitable for a wide range of processor cores. Use the boot monitor DC command to list the default frequencies. Use the SC command to change the SIB settings. Use the CC command to change the board frequencies immediately to the SIB settings.

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