INT 13 - IBM/MS INT 13 Extensions - EXTENDED MEDIA CHANGE

	AH = 49h
	DL = drive number
Return: CF clear if media has not changed
	    AH = 00h
	CF set if media may have changed
	    AH = 06h (see #00234)
Note:	unlike AH=16h, any drive number may be specified
SeeAlso: AH=16h,AH=41h"INT 13 Ext",AH=46h