Update For Windows 98 Retail Upgrade ACPI System Enumeration:
This information was originally published when ACPI was a new feature and not all Motherboard BIOS's were ACPI compliant. We've come a long way since then! We're providing this info for historical value and in case anyone is still using Win98 - Time to Upgrade!
Windows 98 Retail Operating System Upgrades—will
automatically install Advanced Configuration and Power Interface (ACPI)
support only for those systems containing ACPI BIOS's which have been
fully validated by the Microsoft Windows 98 Test Team. The Windows 98 Test
Team has chosen this course in order to minimize the number of service
calls from retail customers related to problems with untested ACPI BIOS
NOTE: IF you built your PC or acquired an Win98 OEM CD License when you purchase your PC Components, you are your OWN OEM therefore you are your OWN Tech Support! Which means Retail Win98 Full Install or Upgrade Installation CD - You can call Microsoft for Tech Support. As IF? OEM - YOU are Tech Support or whoever Built your PC but DON'T call Microsoft! OK! Now, what part of that do you NOT understand?
The Big difference in ACPI vs. APM - When you close Windows 98 with ACPI enabled (Advanced Configuration Power Interface), your ATX PC System will Shut Down automatically whereas Windows 98 with APM (Advanced Power Management) would tell you, "It's Safe To Turn Off Your PC Now". APM was introduced with AT Systems. ATX which started with APM progressed rapidly to embrace ACPI. And NO, AT style PC's cannot enable ACPI. Those PC's are stuck with APM! For what it's worth, the AT spec was introduced with the IBM 286. Before that we had XT PC's. It all about Power Management & Automatically Managed PC's. I digressed...
How To enable ACPI for testing.
How To deliver validated ACPI functionality in systems with Windows 98 preinstalled.
And How To deliver ACPI functionality for upgrade customers who have ACPI hardware.
Resolutions for each of these concerns are defined in this article.
The following instructions will allow any OEM to enable ACPI on its systems for testing with Windows 98:
When your ACPI BIOS has completed validation
testing with WHQL and when Windows 98 is released, you can use the Windows
98 OEM Preinstallation Kit (OPK) to enable ACPI support when you
preinstall Windows 98 on new systems.
To support customers who purchase systems with ACPI hardware before Windows 98 is available, OEMs can provide the following, depending on whether the system already contains a validated ACPI BIOS:
An easy way to create the INF File for mass use was to Export that Registry Key ONLY from a System which had this "ACPIOption" enabled as described above!
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Web Development, Gill Boyd & Team - Posted 05/20/2001; Updated 03/18/2003