8086 PCs may be equipped with an EMS card offering LIM memory. If you're fortunate enough to own such a card, today you can unlock XMS support by installing EXMS86.
EXMS86 is a TSR that provides XMS 2.0 extended memory services by leveraging an EMS 4.0 expanded memory source. It’s tailored for 16-bit DOS systems outfitted with EMS hardware such as the Lo-Tech EMS board, Bocaram XT, etc.
http://mateusz.fr/exms86/