Cpu vendor identification in BP7

Karem FENNOUC

Delphi Developer

Wed, 18 Jun 1902 08:00:00 GMT

Cpu vendor identification in BP7

I downloaded an asm function from the Cyrix web site. It returns the values
contained in eax, ebx, ecx and edx registers after a cpuid call. What can I
do to use it in BP7 (prototype of the external procedure ?) My problem is
getting the cpu vendor identification (input eax = 0).

Thanx.

;**************************************************************************
; Function: void get_cpuid_info (long level,
; long &reg_eax,
; long &reg_ebx,
; long &reg_ecx,
; long &reg_edx)
;
; Purpose: Execute CPUID instruction at level (eax==level)
;
; Inputs: level - eax value when CPUID is executed
;
; Output: reg_eax - eax after executing CPUID
; reg_ebx - ebx after executing CPUID
; reg_ecx - ecx after executing CPUID
; reg_edx - edx after executing CPUID
;**************************************************************************
_get_cpuid_info proc near
.386
push bp
mov bp, sp

push eax
push ebx
push ecx
push edx
push esi

mov eax, dword ptr [bp+4] ; get level

cpuid

mov si,word ptr [bp+8]
mov dword ptr [si],eax ; reg_eax := eax

mov si,word ptr [bp+10]
mov dword ptr [si],ebx ; reg_ebx := ebx

mov si,word ptr [bp+12] ; reg_ecx := ecx
mov dword ptr [si],ecx

mov si,word ptr [bp+14] ; reg_edx := edx
mov dword ptr [si],edx

pop esi
pop edx
pop ecx
pop ebx
pop eax

mov sp,bp
pop bp
ret
_get_cpuid_info endp

Brent Bea

Delphi Developer

Wed, 18 Jun 1902 08:00:00 GMT

Re:Cpu vendor identification in BP7

On Fri Jul 10, "Karem FENNOUCH" wrote:

Quote

>I downloaded an asm function from the Cyrix web site. It returns the values
>contained in eax, ebx, ecx and edx registers after a cpuid call. What can I
>do to use it in BP7 (prototype of the external procedure ?) My problem is
>getting the cpu vendor identification (input eax = 0).

This, or something very like it, might work directly as a BP7
procedure:

var
regeax, regebx, regecx, regedx : longint;

procedure
getcpuid( level : longint); assembler;
(* Purpose: Execute CPUID instruction at level (eax==level)

Inputs: level - eax value when CPUID is executed

Output: reg_eax - eax after executing CPUID
reg_ebx - ebx after executing CPUID
reg_ecx - ecx after executing CPUID
reg_edx - edx after executing CPUID
*)

asm
$66 mov ax,level
cpuid
$66 mov regeax,ax
$66 mov regebx,bx
$66 mov regecx,cx
$66 mov regedx,dx
end;

Brent
--
Brent Beach, Victoria, BC

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