INT 2F - DOS 5+ KEYB.COM - GET KEYBOARD MAPPING                                 
	AX = AD83h
Return: BL = current state
	    00h US keyboard
	    FFh foreign keyboard
Note:	the states 00h and FFh correspond with the byte stored at offset +02h
	  in KEYBs INT 09h handler
SeeAlso: AX=AD82h,AX=AD85h,INT 09