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