IBM 5150/5160 - AT2XTKB Keyboard Converter
An AT-class keyboard connected to an IBM 5150 (IBM PC) or IBM 5160 (IBM XT) does not work.
The adapter pictured below allows that combination to work.
It captures the output of the AT-class keyboard, changing the keyboard protocol from the AT one down to an earlier protocol that the PC and XT motherboards recognise.
Click here for more information about the adapter.