5 Replies Latest reply on Dec 26, 2009 12:26 PM by avk

    Frequency-Determination Assembler Code

    tannergooding
      The Frequency-Determination Assembler Code is mentioned in all of the AMD BKDG but I can't find it anywhere on the site.

      Ok, so in all of the BIOS and Kernel Developers Guides, they have a bios checklist and mention that you should perform CPU speed detection. It says to see the example frequency-determination assembler code available on the AMD web site but I can not find it anywhere. Any help in locating it would be greatly appreciated.

      The following is from Page 327 of the 'BIOS and Kernel Developer's Guide for AMD Athlon(tm) 64 and AMD Opteron(tm) Processors". Publication #26094

      12.2 CPU Speed Detection

       

       

       

      The BIOS can use the time-stamp counter (TSC) to clock a timed operation and compare the result to the Real-Time Clock (RTC) to determine the operating frequency. See the example of frequency-determination assembler code available on the AMD web site.