INT 15,C2 - Pointing Device BIOS Interface (PS/2 only)

	AH = C2
	AL = 0	enable/disable pointing device (BH contains flag)
	   = 1	reset pointing device
	   = 2	set sample rate
	   = 3	set resolution
	   = 4	read device type
	   = 5	pointing device initialization
	   = 6	extended commands
	   = 7	pointing device far call initialization
	BH = 0 indicates enable for AL = 0
	   = 1 indicates disable for AL = 0


	on return:
	CF = 0 if successful
	   = 1 if error
	AH = when CF set, 80h for PC & PCjr, 86h for XT, AT
	   = 01  invalid function call
	   = 02  invalid input
	   = 03  interface error
	   = 04  resend
	   = 05  no far call installed