NAME    [Toc]    [Back]

     ichpcib - Intel ICHx/ICHx-M LPC bridges

SYNOPSIS    [Toc]    [Back]

     ichpcib* at pci? dev ? function ?
     isa* at ichpcib?

DESCRIPTION    [Toc]    [Back]

     The ichpcib driver supports Intel ICH, ICH0,  ICH2,  ICH2-M,
ICH3-S,
     ICH3-M,  ICH4, ICH4-M, and ICH-5 LPC bridges.  These devices
are mostly
     usual PCI-ISA bridges but with some additional power management and monitoring
  capabilities.  Besides the core pcib(4) functionality, the ichpcib
     driver provides support for the Intel SpeedStep  technology,
available for
     the ICH2-M, ICH3-M, and ICH4-M chipsets.  It allows the user
to control
     CPU frequency with the sysctl(8) program.

SEE ALSO    [Toc]    [Back]

     cpu(4), intro(4), isa(4), pci(4), pcib(4), sysctl(8)

HISTORY    [Toc]    [Back]

     Intel SpeedStep support for the ICHx-M  chipsets  first  appeared in OpenBSD
     3.5 as part of the pcib(4) driver.  The ichpcib driver first
appeared in
     OpenBSD 3.6.

AUTHORS    [Toc]    [Back]

     The ichpcib driver was written by Alexander Yurchenko
     <[email protected]>.

CAVEATS    [Toc]    [Back]

     On some old machines with the ICH2-M chipset,  Intel  SpeedStep isn't
     available.

OpenBSD      3.6                          March      31,     2004