Advanced Configuration and Power Interface
<hardware, standard> (ACPI) An open industry standard developed by Intel,
Microsoft, and Toshiba for configuration and power management.
The key element of the standard is power management with two important
improvements. First, it puts the OS in control of power management. In the
currently existing APM model most of the power management tasks are run by the
BIOS, with limited intervention from the OS. In ACPI, the BIOS is responsible
for the dirty details of communicating with hardware equipment but the control
is in the OS.
The other important feature is bringing power management features now available
in portable computers only to the desktop as well as into servers. Extremely low
consumption states, i.e., in which only memory, or not even memory is powered,
but from which ordinary interrupts (real time clock, keyboard, modem, etc.) can
quickly wake the system, are today available in portables only. The standard
should make these available for a wider range of systems.
For ACPI to work the operating system, the motherboard chipset, and for some
functions even the CPU has to be designed for it. Microsoft is heavily driving a
move toward ACPI, both Windows NT 5.0 and Windows 98 will support it. It remains
to be seen how much hardware manufacturers will embrace the technology and
whether other operating system vendors will support it.
ACPI Information Page.
Advanced Communication Function/Network Control
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Advanced Computing Environment « Advanced
Configuration and Power Interface
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