ben/CnC_Red_Alert
1
0
Fork 0
mirror of https://github.com/electronicarts/CnC_Red_Alert.git synced 2025-12-15 23:21:40 -05:00
Code Issues Packages Projects Releases Wiki Activity

Initial commit of Command & Conquer Red Alert source code.

Browse Source
This commit is contained in:
LFeenanEA
2025-02-27 16:15:05 +00:00
parent b685cea758
commit 5e733d5dcc
2082 changed files with 797727 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

151
WWFLAT32/PLAYCD/GETCD.CPP Normal file
View File

@@ -0,0 +1,151 @@
/*
** 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/>.
*/
/***************************************************************************
** 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 : WWLIB *
* *
* File Name : GETCD.CPP *
* *
* Programmer : STEVE WETHERILL BASED ON JOE BOSTIC CODE *
* *
* Start Date : 5/13/94 *
* *
* Last Update : June 4, 1994 [SW] *
* *
*-------------------------------------------------------------------------*
*-------------------------------------------------------------------------*
* Functions: *
* GetCDClass::GetCDClass -- default constructor *
* GetCDClass::~GetCDClass -- destructor *
* GetCDClass::GetCDDrive -- returns the logical CD drive *
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dos.h>
#include "wwstd.h"
#include "playcd.h"
#include "wwmem.h"
/***************************************************************************
* GetCDClass -- default constructor *
* *
* *
* *
* INPUT: *
* none *
* OUTPUT: *
* none *
* WARNINGS: *
* *
* HISTORY: *
* 05/26/1994 SW : Created. *
*=========================================================================*/
GetCDClass::GetCDClass(VOID)
{
memset ( this , 0 , sizeof ( GetCDClass ) ) ;
if (DPMI_real_alloc(2, &cdDrive_addrp, &largestp))
exit(1);
CDCount = 0;
CDIndex = 0;
/*
** Set all CD drive placeholders to empty
*/
memset (CDDrives, NO_CD_DRIVE, MAX_CD_DRIVES);
/*
** Dos will only currently support one cd drive so just
** set the first entry to it.
*/
GetCDDrives();
}
/***************************************************************************
* GetCDClass -- destructor *
* *
* *
* *
* INPUT: *
* none *
* OUTPUT: *
* none *
* WARNINGS: *
* *
* HISTORY: *
* 05/26/1994 SW: Created. *
*=========================================================================*/
GetCDClass::~GetCDClass(VOID)
{
if(cdDrive_addrp.seg)
DPMI_real_free(cdDrive_addrp); // free up those conventional buffers
}
/***************************************************************************
* GetCDDrive -- returns the logical CD drive *
* *
* *
* *
* INPUT: *
* none *
* OUTPUT: *
* WORD logical_drive *
* WARNINGS: *
* *
* HISTORY: *
* 05/26/1994 SW : Created. *
*=========================================================================*/
void GetCDClass::GetCDDrives(VOID)
{
for (int lp = 0; lp < 26; lp++ ) {
/*
** This call determines if the current specifed drive is a
** CD ROM drive.
** Input:
** AX = 150Bh
** CX = CD rom drive letter to check (A = 0, B = 1)
** Output:
** AX = non zero if drive is a CD ROM, zero if it is not.
** BX = Signature word (ADADh if CD rom extension are installed)
*/
sregs . es = cdDrive_addrp . seg ;
regs . x . ebx = 0;
regs . x . eax = 0x150B;
regs . x . ecx = lp;
DPMI_real_intr ( 0x2F , & regs , & sregs ) ;
if (regs.x.ebx == 0xADAD && regs.x.eax != 0) {
CDDrives[CDCount++] = lp;
}
}
}
/* ==================================================================== */