/* Reconstructed Commander Keen 4-6 Source Code
 * Copyright (C) 2021 K1n9_Duk3
 *
 * This file is primarily based on:
 * Catacomb 3-D Source Code
 * Copyright (C) 1993-2014 Flat Rock Software
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

// ID_MM.H

#ifndef __ID_CA__

#define __ID_CA__

#define SAVENEARHEAP	0x400		// space to leave in data segment
#define SAVEFARHEAP		0			// space to leave in far heap

#define	BUFFERSIZE		0x1000		// miscelanious, allways available buffer

#ifdef CAT3D
#define MAXBLOCKS		600
#else
#define MAXBLOCKS		1200
#endif


//--------

#define	EMS_INT			0x67

#define	EMS_STATUS		0x40
#define	EMS_GETFRAME	0x41
#define	EMS_GETPAGES	0x42
#define	EMS_ALLOCPAGES	0x43
#define	EMS_MAPPAGE		0x44
#define	EMS_FREEPAGES	0x45
#define	EMS_VERSION		0x46

//--------

#define	XMS_VERSION		0x00

#define	XMS_ALLOCHMA	0x01
#define	XMS_FREEHMA		0x02

#define	XMS_GENABLEA20	0x03
#define	XMS_GDISABLEA20	0x04
#define	XMS_LENABLEA20	0x05
#define	XMS_LDISABLEA20	0x06
#define	XMS_QUERYA20	0x07

#define	XMS_QUERYREE	0x08
#define	XMS_ALLOC		0x09
#define	XMS_FREE		0x0A
#define	XMS_MOVE		0x0B
#define	XMS_LOCK		0x0C
#define	XMS_UNLOCK		0x0D
#define	XMS_GETINFO		0x0E
#define	XMS_RESIZE		0x0F

#define	XMS_ALLOCUMB	0x10
#define	XMS_FREEUMB		0x11

//==========================================================================

typedef void _seg * memptr;

typedef struct
{
	long	nearheap,farheap,EMSmem,XMSmem,mainmem;
} mminfotype;

//==========================================================================

extern	mminfotype	mminfo;
extern	memptr		bufferseg;
extern	boolean		mmerror;

extern	void		(* beforesort) (void);
extern	void		(* aftersort) (void);

//==========================================================================

void MM_Startup (void);
void MM_Shutdown (void);
void MM_MapEMS (void);

void MM_GetPtr (memptr *baseptr,unsigned long size);
void MM_FreePtr (memptr *baseptr);

void MM_SetPurge (memptr *baseptr, int purge);
void MM_SetLock (memptr *baseptr, boolean locked);
void MM_SortMem (void);

void MM_ShowMemory (void);

long MM_UnusedMemory (void);
long MM_TotalFree (void);

void MM_BombOnError (boolean bomb);

#endif