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- ;
- ; Command & Conquer Red Alert(tm)
- ; Copyright 2025 Electronic Arts Inc.
- ;
- ; This program is free software: you can redistribute it and/or modify
- ; it under the terms of the GNU General Public License as published by
- ; the Free Software Foundation, either version 3 of the License, or
- ; (at your option) any later version.
- ;
- ; This program is distributed in the hope that it will be useful,
- ; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ; GNU General Public License for more details.
- ;
- ; You should have received a copy of the GNU General Public License
- ; along with this program. If not, see <http://www.gnu.org/licenses/>.
- ;
- ; $Header: g:/library/wwlib32/system/rcs/opsys.asm 1.1 1994/04/18 09:14:12 jeff_wilson Exp $
- ;***************************************************************************
- ;** C O N F I D E N T I A L --- W E S T W O O D A S S O C I A T E S **
- ;***************************************************************************
- ;* *
- ;* Project Name : Operating System Flags *
- ;* *
- ;* File Name : OPSYS.ASM *
- ;* *
- ;* Programmer : Scott Bowen *
- ;* *
- ;* Start Date : January 26, 1993 *
- ;* *
- ;* Last Update : January 26, 1993 [SB] *
- ;* *
- ;* Updated to 32bit protected mode JAW *
- ;* *
- ;*-------------------------------------------------------------------------*
- ;* Functions: *
- ;* Operating_System -- Determines what the operating system is. *
- ;* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - *
- IDEAL
- P386
- MODEL USE32 FLAT
- GLOBAL Get_CPU :NEAR
- DATASEG
- OperatingSystem dw 0
- CODESEG
- ;***************************************************************************
- ;* Operating_System -- Determines what the operating system is. *
- ;* *
- ;* INPUT: NONE. *
- ;* *
- ;* OUTPUT: *
- ;* *
- ;* WARNINGS: *
- ;* *
- ;* HISTORY: *
- ;* 01/26/1993 SB : Created. *
- ;*=========================================================================*
- PROC Get_CPU C near
- USES ebx,ecx,edx,es,edi
- IF 0
- xor eax,eax
- mov ax,1
- pushf
- pop bx
- and bh,0fh
- push bx
- popf
- pushf
- pop cx
- and ch,0f0h
- cmp ch,0f0h
- je @@1 ;8086 or below 80286
- inc ax
- or bh,0f0h
- push bx
- popf
- pushf
- pop cx
- and ch,0f0h
- je @@1 ;80286
- ENDIF
- mov eax,3
- mov ebx,esp
- and esp,0fffffffch
- pushfd
- pop edx
- mov ecx,edx
- xor edx,000040000h
- push edx
- popfd
- pushfd
- pop edx
- push ecx
- popfd
- xor edx,ecx
- and edx,000040000h ;test alignment check bit
- mov esp,ebx
- jz @@1 ;80386
- ;.486
- inc eax
- pushfd
- pop edx
- mov ecx,edx
- xor edx,000200000h
- push edx
- popfd
- pushfd
- pop edx
- push ecx
- popfd
- xor edx,ecx ;test id bit
- jz @@1 ;80486
- P586
- mov eax,1
- ;.586 or higher, cpuid returns cpu generation number in ax bits 8-11
- cpuid
- and eax,0f00h
- shr eax,8
- P386
- @@1: ret
- ENDP Get_CPU
- ;----------------------------------------------------------------------------
- END
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