ICHPCIB(4) OpenBSD Programmer's Manual (i386) ICHPCIB(4)NAMEichpcib - 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
capabilities. Besides the core functionality, the ichpcib driver
provides support 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 ALSOcpu(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
appeared 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 4.9 October 18, 2007 OpenBSD 4.9