INT 2F - PCIBM PC DOS 5.0+ KEYB.COM - GET KEYBOARD SUB-MAPPING
	AX = AD85h
	BL = new layout
	    00h primary layout
	    01h secondary layout
Note:	This function is not supported by MS-DOS 5.0 - 7.10.
SeeAlso: AX=AD84h,AX=AD83h