Advanced Configuration and Power Interface Specification

Device Configuration
Return Value Information
Package {
LanguageDescriptor[0]
// Package
}
LanguageDescriptor[n]
// Package
Each Language Descriptor sub-Package contains the elements described below:
Package {
LanguageId
UnicodeDescription
}
// String
// Buffer
LanguageId is a string identifying the language. This string follows the format specified in the
Internet RFC 3066 document (Tags for the Identification of Languages). In addition to supporting
the existing strings in RFC 3066, Table 6-169 lists aliases that are also supported.
Table 6-169 Additional Language ID Alias Strings
RFC String
zh-Hans
zh-Hant
Supported Alias String
zh-chs
zh-cht
UnicodeDescription is a Buffer containing a Unicode (UTF-16) string. This string contains the
language-specific description of the device corresponding to the LanguageID. The Unicode() ASL
macro can be used to create this Buffer.
Example:
Device (XYZ) {
Name (_ADR, 0x00020001)
Name ( _MLS, Package(){(2){“en”, Unicode("ACME super DVD controller")}})
}
6.1.8 _PLD (Physical Location of Device)
This optional object is a method that conveys to OSPM a general description of the physical location
of a device’s external connection point. The _PLD may be child object for any ACPI Namespace
object the system wants to describe. This information can be used by system software to describe to
the user which specific connector or device input mechanism may be used for a given task or may
need user intervention for correct operation. The _PLD should only be evaluated when its parent
device is present as indicated by the device’s presence mechanism (i.e. _STA or other)
An externally exposed device connection point can reside on any surface of a system’s housing. The
respective surfaces of a system’s housing are identified by the “Panel” field (described below). The
_PLD method returns data to describe the location of where the device’s connection point resides
and a Shape (described below) that may be rendered at that position. One physical device may have
several connection points. A _PLD describes the offset and rotation of a single device connection
point from an “origin” that resides in the lower left hand corner of its Panel.
All Panel references (Top, Bottom, Right, Left, etc.) are interpreted as though the user is facing the
front of the system. For handheld mobile devices, the front panel is the one holding the display
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