INT 15 u - IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. 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. - SMART ENERGY SYSTEM - GET PROCESSOR SPEED AX = 2305h Return: CF clear if successful AL = processor speed in MHz CF set on error AL = FFh (speed unknown or >80 MHz) AL = error code (80h,86h = unsupported function) Note: IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. classifies this function as optional SeeAlso: AX=2301h,AX=2304h,AH=BCh