Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
networking, database, communications, or financial operations within a corporation or
government.
SOHO Server
A multi-user, stationary computing device that frequently resides in a separate area or
room in a small or home office. May contain more than one processor. Must be
connected to AC power to function. This device is generally used to support all of the
networking, database, communications, and financial operations of a small office or
home office.
Appliance PC
A device specifically designed to operate in a low-noise, high-availability
environment such as a consumer’s living rooms or family room. Most often contains
one processor. This category also includes home Internet gateways, Web pads, set top
boxes and other devices that support ACPI. Must be connected to AC power to
function. Normally they are sealed case style and may only perform a subset of the
tasks normally associated with today’s personal computers.
Performance Server
A multi-user stationary computing device that frequently resides in a separate, often
specially designed room. Will often contain more than one processor. Must be
connected to AC power to function. This device is used in an environment where
power savings features are willing to be sacrificed for better performance and quicker
responsiveness.
Tablet
A full-featured, highly mobile computing device which resembles writing tablets and
which users interact with primarily through a touch interface. The touch digitizer is
the primary user input device, although a keyboard and/or mouse may be present.
Tablet devices typically run on battery power and are generally only plugged into AC
power in order to charge. This device performs many of the same tasks as Mobile;
however battery life expectations of Tablet devices generally require more aggressive
power savings especially for managing display and touch components.
5.2.9.2 System Type Attributes
This set of flags is used by the OS to assist in determining assumptions about power and device
management. These flags are read at boot time and are used to make decisions about power
management and device settings. For example, a system that has the SEALED_CASE bit set may
take a very aggressive low noise policy toward thermal management. In another example an OS
might not load video, keyboard or mouse drivers on a HEADLESS system.
5.2.9.3 IA-PC Boot Architecture Flags
This set of flags is used by an OS to guide the assumptions it can make in initializing hardware on
IA-PC platforms. These flags are used by an OS at boot time (before the OS is capable of providing
an operating environment suitable for parsing the ACPI namespace) to determine the code paths to
take during boot. In IA-PC platforms with reduced legacy hardware, the OS can skip code paths for
legacy devices if none are present. For example, if there are no ISA devices, an OS could skip code
128 April, 2015 Version 6.0