Unix/Linux Go Back    


NetBSD 6.1.5 - man page for piixpcib (netbsd section 4)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)


PIIXPCIB(4)			   BSD Kernel Interfaces Manual 		      PIIXPCIB(4)

NAME
     piixpcib -- Intel PIIX4 PCI-ISA bridge with SpeedStep

SYNOPSIS
     piixpcib* at pci? dev ? function ?
     isa* at piixpcib?

DESCRIPTION
     The piixpcib driver provides support for the Intel PIIX and compatible PCI-ISA Bridges with
     Intel's first generation SpeedStep.

     Frequency scaling is supported on Pentium III with two voltage modes, used by SpeedStep as
     power states low and high.  The driver will switch into low power state by reducing voltage
     and frequency of the CPU.	The factor depends on the processor itself, but will always
     reduce power consumption about 1/2.

     The user can manually control the CPU frequency with the sysctl(8) program using the follow-
     ing node:

	   machdep.speedstep_state = [0/1]

SEE ALSO
     est(4), isa(4), pci(4), apmd(8), sysctl(8)

HISTORY
     The piixpcib driver first appeared in FreeBSD 5.5 and then in NetBSD 4.0.

AUTHORS
     The current piixpcib driver was written by Bruno Ducrot.  It was ported to NetBSD by Jared
     D. McNeill <jmcneill@NetBSD.org>.

BSD					  March 1, 2011 				      BSD
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums


All times are GMT -4. The time now is 08:15 PM.