Int 16 Fn 23  - Hunter 16 - Control Emergency Breakout                     [b]

   AH = 23h
   AL = new state of breakout (00h enabled, nonzero disabled)
   BX = 0708h
   CX = 0910h
   DX = 1112h

Return: AL = 00h if successful
Desc:  Enables or disables the emergency breakout feature, where the
     Hunter 16 at power on checks whether the X and P keys are pressed.
     If so the machine will boot rather than continue the running program

See Also: AH=22h"HUNTER"