Mega Code Archive
Detecting CPU type
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Title: Detecting CPU type
Question: I need to know which type of CPU is in my system.
How can I do that ???
Answer:
//---------------------------------------------------------------------------
// Author : Digital Survivor [Esteban Rodrguez Nieto | Jos Plano]
// Email : plmad666@gmail.com | jose.plano@gmail.com
// Web site : www.ds-studios.com.ar
//---------------------------------------------------------------------------
{ Note: This code seems not to work in all machines. It's seems also not to work with all kinds of CPUs, but try it. It works for me... }
Unit CPUid;
Interface
Type
TCpuType = (cpu8086, cpu286, cpu386, cpu486, cpuPentium);
Function CpuType : TCpuType;
Function CpuTypeString : String;
Implementation
Uses
SysUtils;
Function CpuType : TCpuType; ASSEMBLER;
Asm
// 8086 CPU check
push ds
pushf
pop bx
mov ax, 0fffh
and ax, bx
push ax
popf
pushf
pop ax
and ax, 0f000h
cmp ax, 0f000h
mov ax, cpu8086
je @@End_CpuType
// 80286 CPU check
or bx, 0f000h
push bx
popf
pushf
pop ax
and ax, 0f000h
mov ax, cpu286
jz @@End_CpuType
// 386 CPU check
db 66h
pushf
db 66h
pop ax
db 66h
mov cx, ax
db 66h
xor ax, 0h
dw 0004h
db 66h
push ax
db 66h
popf
db 66h
pushf
db 66h
pop ax
db 66h
xor ax, cx
mov ax, cpu386
je @@End_CpuType
// 486 CPU check
db 66h
pushf
db 66h
pop ax
db 66h
mov cx, ax
db 66h
xor ax, 0h
dw 0020h
db 66h
push ax
db 66h
popf
db 66h
pushf
db 66h
pop ax
db 66h
xor ax, cx
mov ax, cpu486
je @@End_CpuType
// Pentium CPU check
db 66h
mov ax, 1
dw 0
db 66h
db 0Fh
db 0a2h
db 66h
and ax, 0F00H
dw 0
db 66h
shr ax, 8
sub ax, 1
@@End_CpuType:
pop ds
End;
Function CpuTypeString : String;
Var
Kind : TCpuType;
Begin
Kind := CpuType;
Case Kind Of
cpu8086 : Result := '8086';
cpu286 : Result := '286';
cpu386 : Result := '386';
cpu486 : Result := '486';
cpuPentium : Result := 'Pentium';
Else Result := Format ('P%d', [Ord (kind)]);
End;
End;
End.
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