Category: DOS extenders
Flags: Undocumented function, available only in protected mode

INT 21 - Rational Systems DOS/4GW - GET ??? FUNCTIONS

	AH = FFh
	DH = 15h
Return: CF clear
	    DX:AX -> FAR function for ???
	    CX:BX -> FAR function for ???
	    SI:DI -> FAR function for ???