Previous thread: P55T2P4 Cache problems

I replaced the cache on my Asus P/I-P55T2P4 rev 3.0, which was hanging after post with L2 cache enabled in BIOS. Now, it's working great. I've been able to install multiple OSes and run 3D applications with expected performance, etc.

I have run into an issue with this board concerning bus mastering IDE drivers. I first was working with W95 OSR2.5 (version "C") and tried this driver:
https://www.vogonsdrivers.com/getfile.php?fileid=1630 (Intel PIIX Bus Master IDE Drivers for Windows 95)
This driver gives a slightly infamous error, where windows can't find "ideatapi.mpd" when trying to install it. I grabbed this file from an older version of the driver, and this mostly results in Windows hanging after the splash screen, stuck in text mode with a blinking cursor. This driver says it's only for Windows 95 B and lower, so this could be part of the issue (I get the same behavior if I install this driver in Windows 98SE).

Next, I tried drivers from the motherboard's bundled floppy driver disk (labelled v1.6). These are timestamped about a year older and actually unpack the "ideatapi.mpd" such that I can point the driver wizard to it. These seem to install fine, but after they're all loaded and I reboot, I get what feels like DMA hanging. Keyboard locks still respond but I'll periodically or completely lose mouse input, and I lose keyboard input completely. Additionally, while Windows boots into GUI (desktop background, mouse cursor, no desktop icons or taskbar) it never gets any farther. The system hangs or sometimes blue screens eventually, telling me it's stuck waiting. This behavior is the same in Windows 95 C and 98SE. I also tried an image of the same floppy, version 1.2, that I found on the internet archive.

Lastly, I tried the following:
https://www.vogonsdrivers.com/getfile.php?fileid=398 (Triones DMA (Bus Mastering) IDE drivers)
This was the most promising. I could install drivers without any real lockups or freezing etc, although Windows Explorer did seem to hang for a few seconds sometimes. I can enable DMA for the CD drive, but if I enable it for the hard drive, I get the same hanging/lockup behavior as above.

For me, the default Windows 95 C drivers did not have DMA tickboxes, but the default Windows 98SE drivers did. When enabling DMA with those drivers, Windows hangs in text mode after the splash.

I'm wondering if anyone has similar issues with this board or similar boards and might be able to give some insight. I found this:
https://etmriwi.home.xs4all.nl/kalle.htm#DISK
"If you have OSR2 go to the Device Manger and enable the DMA Checkbox in your Drives property sheet. Don't try to instal Intel Bus Master Drivers if you have DMA Checkbox! WIN95 OSR2 Drivers are better and the Intel Drivers may be difficult to remove!"

Another thing worth noting is that I'm using some no-name IDE to SATA adapter, with a Seatools limited 1TB HDD (set to 32GB). I also tried an SSD through the same adapter with no change. I can't imagine this is the problem as I would think the disk wouldn't care whether it was talking to RAM or the CPU, but I don't know for sure.