INT 10 - Cirrus Logic 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. - GET HIGH REFRESH
	AH = 12h
	BL = AEh
Return:	AL = result
	    bits 7-1: reserved
	    bit 0:    640x480 high refresh rate
		      =0 72 Hz
		      =1 75 Hz
SeeAlso: AH=12h/BL=9Ah,AH=12h/BL=A3h,AH=12h/BL=A4h,AH=12h/BL=AFh