GroovyGameGear KeyWiz not working

[MaximRecoil]

I recently bought a KeyWiz40-Eco and it worked perfectly. I was using it with an old PC from 2006 that was barely fast enough for current MAME, so I bought some newer hardware (Intel DH55PJ motherboard, Intel Core i5-650 CPU, and 4 GB of DDR3 RAM). This Intel motherboard only has one PS/2 port, which can be used for either a mouse or keyboard. I've confirmed that a regular PS/2 keyboard works fine with it, but the KeyWiz doesn't work with it at all; not in the OS, not in MAME, and not in the BIOS settings. On the slim chance that the KeyWiz somehow died exactly at the same time that I swapped different hardware into my MAME PC, I have confirmed that there's nothing wrong with the KeyWiz by connecting it to an old Windows 98 PC from 2001, and it works perfectly with that.

In the description on GroovyGameGear's website it says, "The PC thinks the KeyWiz is a standard PS/2 keyboard," but in the case of that Intel motherboard, a standard PS/2 keyboard works fine with it but the KeyWiz doesn't work at all.

[MaximRecoil]

I've tried the Intel motherboard with 3 different PS/2 keyboards now, and they all work perfectly with it. There's definitely nothing wrong with its PS/2 port.

I noticed in the Intel motherboard's BIOS that it has event logging, and every time I boot with just the KeyWiz connected to it, it gets logged as a "no keyboard found" event, so the motherboard isn't seeing the KeyWiz at all.

I'm wondering if it has something to do with the Intel motherboard's singular half-purple, half-green combination PS/2 port:



Do those work differently than a separate PS/2 port that's only for a keyboard? Is there some logic going on in the PS/2 port controller that tells the BIOS whether a keyboard or mouse is plugged into one of those combination PS/2 ports? Since it works with regular PS/2 keyboards, what do they have that the KeyWiz doesn't?

Is anyone here using a KeyWiz with a combination PS/2 port like in the above picture?