INT 2F - DOS Protected-Mode InterfaceAn API which provides basic services for protected-mode programs to allocate memory, invoke real-mode software, etc.  See also Virtual Control Program Interface. - DETECT MODE
	AX = 1686h
Return: AX = 0000h if operating in protected mode under DPMIsee DOS Protected-Mode Interface (INT 31 available)
	AX nonzero if in real/V86see Virtual-86 Mode mode or no DPMIsee DOS Protected-Mode Interface (INT 31 not available)
SeeAlso: AX=1687h