Int 13/AH=FAh/DX=5945h

AH = FAh
DX = 5945h
AL = function (00h-07h)

Return:
Varies by function
if not installed:
CF set
AH = 01h

Note: This API is identical to the ones on INT 16/AH=FAh and INT 21/AH=FAh, so it is listed in its entirety under INT 16/AX=FA00h and following

See Also: INT 16/AX=FA00h