Advanced Configuration and Power Interface Specification

ACPI Software Programming Model
DefinitionBlock (“MD1SSDT.aml",“OEM1",0x02,
“OEMID", "Table1", 0) {
Scope(\_SB) {
Device (\_SB.NOD0) {
Name (_HID, "ACPI0004") // Module device
Name (_UID, 0)
Name (_PRS, ResourceTemplate() {...})
Method (_SRS, 1) {...}
Method (_CRS, 0) {...}
Device (PCI0) { // PCI Root Bridge
Name (_HID, EISAID("PNP0A03"))
Name (_UID, 0)
Name (_BBN, 0x00)
Name (_PRS, ResourceTemplate () {...})
} // end of PCI Root Bridge
} // end of Module device
} // end of \_SB Scope
} // end of Definition Block
DefinitionBlock (“MD1SSDT.aml",“OEM1",0x02,
“OEMID", "Table2", 0) {
Scope(\_SB) {
Device (PCI0) { // PCI Root Bridge
Name (_HID, EISAID("PNP0A03"))
Name (_UID, 0)
Name (_BBN, 0x00)
Name (_PRS, ResourceTemplate () {...})
} // end of PCI Root Bridge
} // end of \_SB Scope
} // end of Definition Block
5.7.3 \_OS (OS Name Object)
This predefined object evaluates to a string that identifies the operating system. In robust OSPM
implementations, \_OS evaluates differently for each OS release. This may allow AML code to
accommodate differences in OSPM implementations. This value does not change with different
revisions of the AML interpreter.
Arguments:
None
Return Value:
A String containing the operating system name.
5.7.4 \_REV (Revision Data Object)
This predefined object evaluates to an Integer (DWORD) representing the revision of the ACPI
Specification implemented by the specified \_OS.
Arguments:
None
Return Value:
An Integer representing the revision of the currently executing ACPI implementation.
1. Only ACPI 1 is supported, only 32-bit integers.
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