This directory contains files that allow an ACPI bios developer to add

instrumentation from within ASL code. ASL code can expose data blocks, methods

and events via WMI by leveraging the WMIACPI.SYS driver. More information

about the mechanics of writing ASL to expose instrumentation information is

available in wmi-acpi.doc or on

http://www.microsoft.com/HWDev/MANAGEABILITY/wmi-acpi.htm.

Device.ASL - ASL code that can be included in the acpi bios that exposes

a set of packages, strings, data, methods and events.

acpimof.mof - Managed Object Format file that contains a description of the

data blocks, methods and events exposed. This description is

required so that WMI is able to access the data blocks, methods

and events.

acpimof.rc, acpimof.def - FIles required to build acpimof.dll, a resource only

dll.

makefile, sources, makefile.inc - build glue

wmi-acpi.doc - White paper describing how to add instrumentation to ASL code.

acpimof.vbs - Built at the same time as acpimof.dll, this file contains a

VBScript applet that will query all classes specified in the

acpimof.mof file.

To add the sample code to your acpi bios and access via WMI:

1. Include the contents of device.asl to your asl source and rebuild the

DSDT. Update the OS with the new dsdt via the registry or reflashing.

2. Build acpimof.dll in this directory. acpimof.dll is a resource only dll

that contains the compiled mof in a form that WMI can import into its

schema.

3. Copy acpimof.dll to %windir%\system32 and add a value named "MofImagePath"

under the HKEY_LOCAL_MACHINE\CurrentControlSet\Services\WmiAcpi key. The

contents of the value should be a path to the acpimof.dll file.

4. Reboot. When PNP recognizes the new device with a pnpid of pnp0c14

it will install wmiacpi.sys automatically and make the mof resource

in acpimof.dll available to the WMI schema.

5. Execute the acpimof.vbs test by entering acpimof.vbs at the command line

and reviewing the acpitest.log to insure that all data returned is correct.

Note that no INF file is needed since Windows supplies an INF for the ACPI mapper device as part of Windows