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unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls,Registry;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Label1: TLabel;
    Label2: TLabel;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
      private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;
  M_Reg:TRegistry;Frequenz:extended;

implementation

{$R *.dfm}

function  Messung:single;
CONST Zeitdauer=500; // 1/2 sekunde
Var StampHi,StampLo:Cardinal;
begin
ASM
dw 310Fh //rdtsc
mov StampLo,eax
mov StampHi,edx
END;
sleep(Zeitdauer);
ASM
dw 310Fh //rdtsc
sub eax,StampLO
sbb edx,StampHi
mov StampLo,eax
mov StampHi,edx
END;
Frequenz:=StampLO/(1000.0*Zeitdauer)
end;


procedure TForm1.Button2Click(Sender: TObject);
begin
Messung;
end;


procedure TForm1.Button1Click(Sender: TObject);
var M_Reg:TRegistry;Frequenz:integer;
begin

M_Reg:=TRegistry.Create;

M_Reg.RootKey:=HKEY_LOCAL_MACHINE;
if M_Reg.OpenKeyReadOnly
('\HARDWARE\DESCRIPTION\System\CentralProcessor\0\')
then Frequenz:=M_Reg.READINTEGER('~MHZ')
else Frequenz:=0;
M_Reg.Free;

Label1.Caption:=inttostr(Frequenz);

end;
end;