Retrieve CPU information

Problem/Question/Abstract:

How to retrieve CPU information?

Answer:

Sometimes u need to know some information about the CPU like: brand id, factory speed, wich instruction set supported etc. If so, than u can use this code.

unit main;

interface

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

type
Tfrm_main = class(TForm)
img_info: TImage;
procedure FormShow(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
procedure info(s1, s2: string);
end;

var
frm_main: Tfrm_main;
gn_speed_y: Integer;
gn_text_y: Integer;
const
gn_speed_x: Integer = 8;
gn_text_x: Integer = 15;
gl_start: Boolean = True;

implementation

{$R *.DFM}

procedure Tfrm_main.FormShow(Sender: TObject);
var
_eax, _ebx, _ecx, _edx: Longword;
i: Integer;
b: Byte;
b1: Word;
s, s1, s2, s3, s_all: string;
begin
//Set the startup colour of the image
img_info.Canvas.Brush.Color := clblue;
img_info.Canvas.FillRect(rect(0, 0, img_info.Width, img_info.Height));

gn_text_y := 5; //position of the 1st text

asm                //asm call to the CPUID inst.
mov eax,0         //sub. func call
db $0F,$A2         //db $0F,$A2 = CPUID instruction
mov _ebx,ebx
mov _ecx,ecx
mov _edx,edx
end;

for i := 0 to 3 do //extract vendor id
begin
b := lo(_ebx);
s := s + chr(b);
b := lo(_ecx);
s1 := s1 + chr(b);
b := lo(_edx);
s2 := s2 + chr(b);
_ebx := _ebx shr 8;
_ecx := _ecx shr 8;
_edx := _edx shr 8;
end;
info('CPU', '');
info('   - ' + 'Vendor ID: ', s + s2 + s1);

asm
mov eax,1
db $0F,$A2
mov _eax,eax
mov _ebx,ebx
mov _ecx,ecx
mov _edx,edx
end;
//06B1
//|0000| |0000 0000| |0000| |00| |00| |0110| |1011| |0001|
b := lo(_eax) and 15;
info('   - ' + 'Stepping ID: ', IntToStr(b));
b := lo(_eax) shr 4;
info('   - ' + 'Model Number: ', IntToHex(b, 1));
b := hi(_eax) and 15;
info('   - ' + 'Family Code: ', IntToStr(b));
b := hi(_eax) shr 4;
info('   - ' + 'Processor Type: ', IntToStr(b));
//31.   28. 27.   24. 23.   20. 19.   16.
//  0 0 0 0   0 0 0 0   0 0 0 0   0 0 0 0
b := lo((_eax shr 16)) and 15;
info('   - ' + 'Extended Model: ', IntToStr(b));

b := lo((_eax shr 20));
info('   - ' + 'Extended Family: ', IntToStr(b));

b := lo(_ebx);
info('   - ' + 'Brand ID: ', IntToStr(b));
b := hi(_ebx);
info('   - ' + 'Chunks: ', IntToStr(b));
b := lo(_ebx shr 16);
info('   - ' + 'Count: ', IntToStr(b));
b := hi(_ebx shr 16);
info('   - ' + 'APIC ID: ', IntToStr(b));

//Bit 18 =? 1     //is serial number enabled?
if (_edx and $40000) = $40000 then
info('   - ' + 'Serial Number ', 'Enabled')
else
info('   - ' + 'Serial Number ', 'Disabled');

s := IntToHex(_eax, 8);
asm                  //determine the serial number
mov eax,3
db $0F,$A2
mov _ecx,ecx
mov _edx,edx
end;
s1 := IntToHex(_edx, 8);
s2 := IntToHex(_ecx, 8);
Insert('-', s, 5);
Insert('-', s1, 5);
Insert('-', s2, 5);
info('   - ' + 'Serial Number: ', s + '-' + s1 + '-' + s2);

asm
mov eax,1
db $0F,$A2
mov _edx,edx
end;
info('', '');
//Bit 23 =? 1
if (_edx and $800000) = $800000 then
info('MMX ', 'Supported')
else
info('MMX ', 'Not Supported');

//Bit 24 =? 1
if (_edx and $01000000) = $01000000 then
info('FXSAVE & FXRSTOR Instructions ', 'Supported')
else
info('FXSAVE & FXRSTOR Instructions Not ', 'Supported');

//Bit 25 =? 1
if (_edx and $02000000) = $02000000 then
info('SSE ', 'Supported')
else
info('SSE ', 'Not Supported');

//Bit 26 =? 1
if (_edx and $04000000) = $04000000 then
info('SSE2 ', 'Supported')
else
info('SSE2 ', 'Not Supported');

info('', '');

asm     //execute the extended CPUID inst.
mov eax,$80000000   //sub. func call
db $0F,$A2
mov _eax,eax
end;

if _eax > $80000000 then //any other sub. funct avail. ?
begin
info('Extended CPUID: ', 'Supported');
info('   - Largest Function Supported: ', IntToStr(_eax - $80000000));
asm     //get brand ID
mov eax,$80000002
db $0F
db $A2
mov _eax,eax
mov _ebx,ebx
mov _ecx,ecx
mov _edx,edx
end;
s := '';
s1 := '';
s2 := '';
s3 := '';
for i := 0 to 3 do
begin
b := lo(_eax);
s3 := s3 + chr(b);
b := lo(_ebx);
s := s + chr(b);
b := lo(_ecx);
s1 := s1 + chr(b);
b := lo(_edx);
s2 := s2 + chr(b);
_eax := _eax shr 8;
_ebx := _ebx shr 8;
_ecx := _ecx shr 8;
_edx := _edx shr 8;
end;

s_all := s3 + s + s1 + s2;

asm
mov eax,$80000003
db $0F
db $A2
mov _eax,eax
mov _ebx,ebx
mov _ecx,ecx
mov _edx,edx
end;
s := '';
s1 := '';
s2 := '';
s3 := '';
for i := 0 to 3 do
begin
b := lo(_eax);
s3 := s3 + chr(b);
b := lo(_ebx);
s := s + chr(b);
b := lo(_ecx);
s1 := s1 + chr(b);
b := lo(_edx);
s2 := s2 + chr(b);
_eax := _eax shr 8;
_ebx := _ebx shr 8;
_ecx := _ecx shr 8;
_edx := _edx shr 8;
end;
s_all := s_all + s3 + s + s1 + s2;

asm
mov eax,$80000004
db $0F
db $A2
mov _eax,eax
mov _ebx,ebx
mov _ecx,ecx
mov _edx,edx
end;
s := '';
s1 := '';
s2 := '';
s3 := '';
for i := 0 to 3 do
begin
b := lo(_eax);
s3 := s3 + chr(b);
b := lo(_ebx);
s := s + chr(b);
b := lo(_ecx);
s1 := s1 + chr(b);
b := lo(_edx);
s2 := s2 + chr(b);
_eax := _eax shr 8;
_ebx := _ebx shr 8;
_ecx := _ecx shr 8;
_edx := _edx shr 8;
end;
info('Brand String: ', '');
if s2[Length(s2)] = #0 then
setlength(s2, Length(s2) - 1);
info('', '   - ' + s_all + s3 + s + s1 + s2);
end
else
info('   - Extended CPUID ', 'Not Supported.');
end;

procedure Tfrm_main.info(s1, s2: string);
begin
if s1 <> '' then
begin
img_info.Canvas.Brush.Color := clblue;
img_info.Canvas.Font.Color := clyellow;
img_info.Canvas.TextOut(gn_text_x, gn_text_y, s1);
end;
if s2 <> '' then
begin
img_info.Canvas.Brush.Color := clblue;
img_info.Canvas.Font.Color := clWhite;
img_info.Canvas.TextOut(gn_text_x + img_info.Canvas.TextWidth(s1), gn_text_y, s2);
end;
Inc(gn_text_y, 13);
end;

end.