ICHPCIB(4)            OpenBSD Programmer's Manual (i386)            ICHPCIB(4)

NAME
     ichpcib - Intel ICHx/ICHx-M LPC bridges

SYNOPSIS
     ichpcib* at pci?
     isa* at ichpcib?

DESCRIPTION
     The ichpcib driver supports Intel ICH, ICH0, ICH2, ICH2-M, ICH3-S,
     ICH3-M, ICH4, ICH4-M, ICH5, ICH6, ICH7, ICH7-M, ICH8, ICH8-M, ICH9,
     6300ESB and 6321ESB LPC bridges.  These devices are mostly usual PCI-ISA
     bridges but with some additional power management and monitoring capabil-
     ities.  Besides the core functionality, the ichpcib driver provides sup-
     port for the Intel SpeedStep technology, available for the ICH2-M,
     ICH3-M, and ICH4-M chipsets, and power management timer available for all
     chipsets.  It allows the user to control CPU frequency with the sysctl(8)
     program.

SEE ALSO
     cpu(4), intro(4), isa(4), pci(4), sysctl(8)

HISTORY
     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 ap-
     peared in OpenBSD 3.6.

AUTHORS
     The ichpcib driver was written by Alexander Yurchenko
     <grange@openbsd.org>.

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

OpenBSD 4.7                    October 18, 2007                              1
