INT 2F U - MS Windows 3.0, 386MAX v6.01 - GET ALIAS SELECTOR TO LDT             
	AX = 1688h
	BX = 0BADh
Return: AX = 0000h if supported
	    BX = alias selector for LDT
Note:	use the LSL instruction or GetSelectorLimit() to find LDT size
	this call should be considered obsolete for Windows 3.1+, as the
	  alias selector can be retrieved via the API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running.  Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes. entry point for
	  "MS-DOS" retrieved from INT 2F/AX=168Ah (see #02720)
SeeAlso: AX=1687h,#02720