Int 15 Fn DA92  U - Ami Pci Bios - Get Cpu Type And Speed                  [-]

   AX = DA92h

Return: CF clear (successful)
   AL = CPU stepping (see also #0453 at INT 15/AH=C9h)
   AH = CPU model
   BL = CPU family (05h = Pentium, etc.)
   CX = external clock speed in MHz (BCD)
       (0040h,0050h,0060h,0066h are possible return values on my
         Pentium with the Intel "Neptune" chipset)
   EAX high word destroyed

Note:  90 MHz and faster Pentium CPUs can be configured to run at varying
     multiples of the external clock speed, i.e. a typical 90 MHz Pentium
     system will run the motherboard at 60 MHz (my 90 MHz Pentium returns
     0060h in CX)

See Also: AH=C9h