INT 10 - Chips & Technologies '64300' 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 CLOCK SPEED AX = 5F03h BH = 00h (get default memory clock) Return: AL = 5Fh if function supported AH = status 00h unsuccessful 01h successful BL = clock speed in MHz SeeAlso: AX=5F02h"64300",AX=5F04h"64300"