Damnation

@Dave-H It's odd that you got a 7B BSOD with option 1 - that's usually the driver that works. It works for my Threadripper 3960x machine, so it's odd that it does not work for you. Fortunately the integrator has alternative options for this reason. This time try options H, 3,4,5

@Dave-H Use the optional patch integrator on the integral edition (vanilla) ISO - that's what its for. option 4 will solve the A5 BSOD You'll also want options 1,3 and 5 So options 1,3,4,5 edit: integral edition found here https://www.zone94.com/downloads/software/operating-systems/123-windows-xp-professional-sp3-x86-integral-edition

@Dave-H In your registry, do a search for CC_0106 does it find anything?

@Dave-H First Check in device manager under "Computer" - If it says something other than "ACPI Multiprocessor PC" then ACPI isn't properly enabled.

@Dave-H Yes it will work - did you copy ntoskrn8.sys across to system32\drivers too? that is needed for it to work. ntoskrn8.sys is in \Integrator Files\Patches\Miscellaneous

@Dave-H It seems you're going to have to do the AHCI driver installation the slow way without the INF file. So you'll need to copy the modded storahci.sys and ntoskrn8.sys drivers into system32\drivers and then add in the registry keys one at a time by hand.

@Dave-H Included with the Integral edition Optional Patch Integrator is a backported version of the Windows 8.0 storahci driver for XP. To install it - go to \Integrator Files\Patches\Miscellaneous\ and copy ntoskrn8.sys into \system32\drivers\ of your XP install - this is needed for the backported driver to work. then go to \Integrator Files\Patches\MovAX-Gen2 SATA driver v2.0\ and install that backported storahci driver located in there.

@Dave-H I'm very interested in helping you solve this. So you want to get ACPI enabled on your system but without doing a fresh install is that right? TBH the easiest solution is to do a fresh install with XP integral edition using the Optional patch integrator which can be found here - https://www.zone94.com/downloads/software/operating-systems/123-windows-xp-professional-sp3-x86-integral-edition Applying the patches to an existing install is the more difficult route. Is preserving the existing installation a must? a new install is much easier thats why all the existing guides prefer it.

Has anyone taken a look at the uploaded source code? also, the source code for the AHCILDR.COM program and AHCI.PDR driver is still missing

I'd just use my B350 K4 motherboard and 2700x CPU instead.

I can confirm that USB-2 PCI-e cards do work in windows 98 SE https://www.ebay.com/itm/USB-2-0-to-PCI-e-x1-expansion-Card-4-External-USB2-0-PCI-express-Adapter-Moschip/223262224944?hash=item33fb773230:g:ilEAAOSwaBZZmNXa

I wasn't sure if this was already in the archive, so I'll upload it just in case Rudy sent this to me on July 27th - It's an updated version of his AHCI driver to fix BSODs on AMD Ryzen B350/B450 chipsets unzip with 7zip AHCI.PAK

is there any possibility for a source code release?

try here - https://support.hp.com/au-en/drivers/selfservice/hp-laserjet-2400-printer-series/416419

Glad to see you got it working, It won't cause any damage, the only thing I can think of is that there might be some obscure piece of hardware that might not work without that embedded controller, I don't know of any such hardware though.

I think it's best to start XP setup again from scratch I would suggest using Easy2Boot http://www.easy2boot.com/download/ I assume you have a spare USB drive to use put my XP ISO with ACPI patched in _ISO\WINDOWS\XP

I'm thinking you might not be integrating into your XP install ISO correctly are you replacing acpi.sy_ in the \I386 folder, rebuilding ISO with nlite, then starting setup?

did you get the same A5 BSOD with that acpi.sys?

OK, Try this acpi.sys report any BSODs acpi.sy_

hmm, ACPI failed to load DDB. can you try this acpi.sys? (already cab compressed) put this in your XP ISO and rebuild with nlite if you get a BSOD, post a screenshot ACPI.SY_

Can you send a screenshot of your A5 BSOD? It will give hints as to what the error is Have you tried my ISO? It has a patched ACPI driver that should have fixed these errors (unless i've missed something)

Thanks very much

Does anyone know of an Alternative Device Manager for Win98? Preferably one that shows HWIDs? So I can know exactly which device I'm installing

We have a storahci driver for XP https://www.win-raid.com/t4035f45-Windows-XP-SP-bit-and-modern-PC-parts-60.html#msg81198 We also have ACPI working on AMD Ryzen

I think newer AMD AHCI storage controllers are dependent on ACPI to manage resources - without ACPI the Advanced Programmable Interrupt Controller doesn't work, so AHCI controller never receives IRQ