INT 2F - DOS Protected ModeOne of the operating modes of the 80286 and higher Intel processors, in which addresses used by programs no longer correspond to physical addresses and the CPU enforces various protection mechanisms designed to prevent one program from disrupting other programs or the operating system.  See also Real Mode, Virtual-86 Mode. Services (DPMSsee DOS Protected-Mode Services) v1.0 - ENABLE/DISABLE DPMSsee DOS Protected-Mode Services
	AX = 43E2h
	BX = new state (0000h disable, 0001h enable)
Return: AX = 0000h if supported
Note:	this function should normally be called only by system software
SeeAlso: AX=43E0h,AX=43E1h,AX=43E3h