INT 10 - Cirrus Logic BIOS - SET MONITOR HORIZONTAL RETRACE FREQUENCY

	AH = 12h
	BL = A2h
	AL = retrace rate
	    00h standard VGA (31.5 kHz)
	    01h 8514-compatible (31.5 kHz and 35.5 kHz interlaced)
	    02h SuperVGA (31.5-35.1 kHz)
	    03h extended SuperVGA (31.5-35.5 kHz)
	    04h multi-frequency (31.5-37.8 kHz)
	    05h extended multi-frequency (31.5-48.0 kHz)
	    06h super multi-frequency (31.5-56.0 kHz)
	    07h extended super multi-frequency (31.5-64.0 kHz)
Return: nothing
SeeAlso: AH=12h/BL=9Ah,AH=12h/BL=A0h,AH=12h/BL=A4h