0:417h                   Shift Status
 
 Length: 1 byte
 
                          Shift Status
 
               7 6 5 4 3 2 1 0
               x . . . . . . .      Insert locked
               . x . . . . . .      Caps Lock locked
               . . x . . . . .      Num Lock locked
               . . . x . . . .      Scroll Lock locked
               . . . . x . . .      Alt key is pressed
               . . . . . x . .      Ctrl key is pressed
               . . . . . . x .      Left Shift key is pressed
               . . . . . . . x      Right Shift key is pressed

Seealso:


 INT 16h, 02h 
 0:418h