Your best bet for 2000 is to ask Blackwingcat on the MSFN forums if he has any plans for that. I want to say he's been on the winraid forums so I don't doubt that he's aware.
I'm not aware of anyone doing anything for 9x as far as hardware support except for USB and AFAIK not USB3.
So ask on MSFN or Winraid (which is pretty much XP+) not much activity here for running unsupported hardware on these operating systems.

This should cover AHCI under Windows 2000 : http://alter.org.ua/soft/win/uni_ata/

Interested.

I started to look into ACPI. Dumped my BIOSes, downloaded a couple versions of the ACPI spec, a couple versions of iASL tools https://acpica.org/downloads/binary-tools and I put an INT3 breakpoint into Win2000 ACPI.SYS and fixed the driver checksum with CFF explorer in preparation to do some instruction traces. That's as far as I got though then other projects got in the way.

BTW, ASMedia USB3 controller works in Win2000, vendor 1B21 device 1142

The XP ACPI driver has been patched already and is working on AMD Ryzen desktop and Ryzen Threadripper.

To get it to work for Windows 2000 I'll first need to resolve some missing imports

in ntoskrnl

InterlockedPopEntrySList
InterlockedPushEntrySList
ExfInterlockedCompareExchange64
HeadlessDispatch
_aulldvrm

Wish me luck.

Duffman wrote on 2022-02-11, 05:24:

InterlockedPopEntrySList
InterlockedPushEntrySList

These are already present with Extended Kernel. Actually the code was already in stock Win2000, just not exported. I think that ExfInterlockedCompareExchange64 is similarly just a dupe of an existing routine but with different calling convention.

HeadlessDispatch
_aulldvrm

Looks like aulldvrm is just a math routine? Should be easy to take care of. HeadlessDispatch I don't know.

It'll be great if substituting the XP ACPI driver works for Win2000.