Unlikely. It's not as if the motherboard makers leave unused traces there for you to tap into. Not saying it's impossible, but it'll differ between each and every motherboard.
However, I have seen motherboards in the past that had pin-headers for PS/2 ports, but that was some time ago and not on your typical consumer boards, even if it was common-ish on consumer boards for a while too.
Here's a datasheet for a typical Super I/O chip from ITE.
X86 Linux ITE SuperIO GPIO Control. Contribute to huchanghui123/ITE-SuperIO development by creating an account on GitHub.
github.com
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