Int 1F Fn FB U - C&t "superstate" Bios - Get/set Cpu Speed [b] AH = FBh BL = function 00h get CPU speed Return: AL = current CPU speed (00h = fast, 01h = slow) 01h set CPU speed AL = new CPU speed (00h = fast, 01h = slow)See Also: AH=FCh/BL=00h