dfs* at macgpio?
driver provides support for the Dynamic
Frequency Switching feature found on some PowerPC microprocessors.
It conserves power by lowering the processor operating frequency. Depending on
the processor model, the processor-to-system bus ratio can be divided by two
Processors supported by the dfs
driver are part of
the PowerPC G4 family and are found on various iBook and PowerBook machines:
MPC7447A PowerPC 7447 "Apollo 7"
MPC7448 PowerPC 7448 "Apollo 8"
MPC7450 RISC Microprocessor Family
Support for the dfs
driver first appeared in