INT 16 - KEYBOARD - GET SHIFT FLAGS                                             
	AH = 02h
Return: AL = shift flags (see #00582)
	AH destroyed by many BIOSes
SeeAlso: AH=12h,AH=22h,INT 17/AH=0Dh,INT 18/AH=02h,MEM 0040h:0017h


Bitfields for keyboard shift flags:
Bit(s)	Description	(Table 00582)
 7	Insert active
 6	CapsLock active
 5	NumLock active
 4	ScrollLock active
 3	Alt key pressed (either Alt on 101/102-key keyboards)
 2	Ctrl key pressed (either Ctrl on 101/102-key keyboards)
 1	left shift key pressed
 0	right shift key pressed
SeeAlso: #00587,#03743,MEM 0040h:0017h,#M0010