INT 10 - EGA Register Interface Library - INTERROGATE DRIVER
AH = FAh
BX = 0000h
Return: BX = 0000h if mouse driver not present
ES:BX -> EGA Register Interface version number, if present:
byte 0 = major release number
byte 1 = minor release number
Note:   the RIL is provided by EGA.SYS, the Microsoft Mouse driver, the OS/2
compatibility box, and others
SeeAlso: INT 2F/AX=BC00h

See also: 10F6

10FA - EGA Register Interface Library - INTERROGATE DRIVER