Do modern motherboards use a keyboard interface chip?

[Stephen Tashi]

TL;DR Summary

Do modern motherboards have a chip that implements the keyboard interface or is this implementation simply a subset of the hardware that implements the USB interface?

Years ago, most PC motherboards had a PS2 connector for the keyboard and (I think) most had a special chip that managed that interface. Now that most PCs use USB keyboards, is the keyboard interface still implemented by a separate chip?

 

[jedishrfu]

I dint think so. I believe the keyboard chip is in the keyboard itself and outputs the appropriate character codes for USB transmission.

https://computer.howstuffworks.com/keyboard2.htm

Laptops though have this circuitry on their system boards since the keyboard is integrated into the whole system.

 

[Rive]

PS2 connector ... had a special chip that managed that interface.

I think the specialized keyboard-controller was integrated into super-IO chips sometimes along the age of 386 CPUs.
Today usually there are no longer any keyboard control circuits, only USB.