Hi all!

I am using 2.0_RC4 on a powerbook g4 12"
The CPU is a PowerMac G4 1.33GHz

NetBSD 2.0_RC4 (DARKNESS) #0: Wed Sep 29 02:21:52 UTC 2004
        serah@powerbook.serah.tvb:/usr/obj/sys/arch/macppc/compile/DARKNESS
total memory = 256 MB
avail memory = 238 MB
mainbus0 (root)
cpu0 at mainbus0: Version 0x8003 (Revision 0x0101), ID 0 (primary)
cpu0: HID0 8410c0bc<EMCP,EICE,DPM,ICE,DCE,SGE,BTIC,FBIOB,ABE,BHT>
cpu0: 668.73 MHz, 256KB L2 cache

The power is plugged in. 
Is there a way to change the CPU frequency from within NetBSD?
Is there a way to change the display brightness? 
Pressing the brightness buttons doesn't do anything, apart from shutting down
the system... 

Thank you,

Davide