ref: 4c510b80e7330e4cb77b1b564483f1b5c3a2dd0f
dir: /Game/src/audiolib/dpmi.h/
/*
Copyright (C) 1994-1995 Apogee Software, Ltd.
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 2
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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/**********************************************************************
module: DPMI.H
author: James R. Dose
date: March 31, 1994
Inline functions for performing DPMI calls.
(c) Copyright 1994 James R. Dose. All Rights Reserved.
**********************************************************************/
#ifndef __DPMI_H
#define __DPMI_H
enum DPMI_Errors
{
DPMI_Warning = -2,
DPMI_Error = -1,
DPMI_Ok = 0
};
typedef struct
{
unsigned long EDI;
unsigned long ESI;
unsigned long EBP;
unsigned long Reserved;
unsigned long EBX;
unsigned long EDX;
unsigned long ECX;
unsigned long EAX;
unsigned short Flags;
unsigned short ES;
unsigned short DS;
unsigned short FS;
unsigned short GS;
unsigned short IP;
unsigned short CS;
unsigned short SP;
unsigned short SS;
} dpmi_regs;
unsigned long DPMI_GetRealModeVector( int num );
void DPMI_SetRealModeVector( int num, unsigned long vector );
int DPMI_CallRealModeFunction( dpmi_regs *callregs );
int DPMI_GetDOSMemory( void **ptr, int *descriptor, unsigned length );
int DPMI_FreeDOSMemory( int descriptor );
int DPMI_LockMemory( void *address, unsigned length );
int DPMI_LockMemoryRegion( void *start, void *end );
int DPMI_UnlockMemory( void *address, unsigned length );
int DPMI_UnlockMemoryRegion( void *start, void *end );
#define DPMI_Lock( variable ) \
( DPMI_LockMemory( &( variable ), sizeof( variable ) ) )
#define DPMI_Unlock( variable ) \
( DPMI_UnlockMemory( &( variable ), sizeof( variable ) ) )
#ifdef PLAT_DOS
#pragma aux DPMI_GetDOSMemory = \
"mov eax, 0100h", \
"add ebx, 15", \
"shr ebx, 4", \
"int 31h", \
"jc DPMI_Exit", \
"movzx eax, ax", \
"shl eax, 4", \
"mov [ esi ], eax", \
"mov [ edi ], edx", \
"sub eax, eax", \
"DPMI_Exit:", \
parm [ esi ] [ edi ] [ ebx ] modify exact [ eax ebx edx ];
#pragma aux DPMI_FreeDOSMemory = \
"mov eax, 0101h", \
"int 31h", \
"jc DPMI_Exit", \
"sub eax, eax", \
"DPMI_Exit:", \
parm [ edx ] modify exact [ eax ];
#endif
#endif