INT 2D - AMIS v3.0+ - GET PRIVATE ENTRY POINT

	AL = 01h
	AH = multiplex number for program
Return: AL = 00h if all API calls via INT 2D
	AL = FFh if entry point supported
	    DX:BX -> entry point for bypassing interrupt chain
Note:	this function is not valid unless a program is installed on the
	  specified multiplex number; use INT 2D/AL=00h to check
SeeAlso: INT 2D/AL=00h,INT 2D/AL=02h,INT 2D/AL=03h,INT 2D/AL=04h,INT 2D/AL=05h
SeeAlso: INT 2D/AL=06h
Index:	entry point;Alternate Multiplex Interrupt|entry point;AMIS