INT 15 - SYSTEM - POINTING DEVICE BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. INTERFACE (PSIBM PS/2, any model) - RESET
	AX = C201h
Return: CF set on error
	    AH = status (see #00522)
	CF clear if successful
	    BH = device ID
	    BL = value returned by attached device after reset
		AAh if device is a mouse
Notes:	after successful completion of this call, the pointing device is set
	  as follows: disabled, sample rate 100 Hz, resolution 4 counts/mm,
	  scaling 1:1, unchanged data package size
	this function should be called before rebooting the system (see
	  INT 15/AH=4Fh), since otherwise the mouse may behave erratically on
	  some systems after the boot.	Before calling this function, the 
	  caller should check that the INT 15h vector is in fact initialized
	  (on some very old machines the IVTsee Interrupt Vector Table may contain 0000h:0000h).
	IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. classifies this function as required
SeeAlso: INT 33/AX=0000h,AX=C200h,AX=C207h