EP9302 Clock Speed
There are two methods that can be used for this. The simplest by far is to use the ts7000.subr script located in /initrd. This script will add the following commands for setting CPU speed:
cpu_speed_max cpu_speed_166 cpu_speed_42 cpu_speed_min
The other method is more complicated and involves poking values into the configuration registers. For further information on which registers, consult the source code in the ts7000.subr script. The registers themselves are currently undocumented. It is recommended to use only the values demonstrated by the script above.