|DFS(4)||Device Drivers Manual (macppc)||DFS(4)|
dfs* at macgpio?
dfsdriver 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 or four.
dfsdriver 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 Reference Manual.
dfsdriver first appeared in OpenBSD 5.0.
|May 25, 2011||OpenBSD-current|