INT 15 - HUNTER 16 - GET/SET BOOST CHARGE (SPM)
	AH = 8Dh
	AL = function
	    00h get
		Return: AL = Fast Charge state (00h prevented, else allowed)
	    nonzero set
		BH = Fast Charge state (00h prevent, nonzero allow)
Return: AH = status
	    00h success
	    FFh failure
Desc:	control whether Fast Charging (200ma rather than 70ma) is allowed
SeeAlso: AH=8Ch