Int 10 Fn 12  - Cirrus Logic Bios - Set Vga Refresh                        [V]

   AH = 12h
   BL = A3h
   AL = refresh rate for 640x480 (00h normal, 01h high)

Return: nothing

See Also: AH=12h/BL=9Ah,AH=12h/BL=A4h