From OS2World.com Wiki
The ACPI is supplied by your computer's vendor in the BIOS. The software in this project is a Platform Specific Driver (PSD) and related files and programs that use the ACPI in your computer's BIOS to configure and operate your computer.
- Commercial Driver. Based on IBM DDK and Intel ACPI.
- Collaborative project on Netlabs, it can not be open source because IBM DDK.