X-Git-Url: http://4ch.mooo.com/gitweb/?a=blobdiff_plain;f=src%2Flib%2F16_pm.c;h=7ecab1eb418ee35fb6ef1d30a77ea3e6c53f51c0;hb=6abb6ddef2f5860213065998a305a574704f6296;hp=22cd7ea57bb276792f4aac787715c4c5f53dacc4;hpb=a85b9bbe1d5e346f24b40fa12c68b9487d6b4a71;p=16.git

diff --git a/src/lib/16_pm.c b/src/lib/16_pm.c
index 22cd7ea5..7ecab1eb 100755
--- a/src/lib/16_pm.c
+++ b/src/lib/16_pm.c
@@ -30,35 +30,36 @@
 #pragma hdrstop
 
 #ifdef __DEBUG__
-boolean debugpm=0;
+boolean dbg_debugpm=0;
 #endif
 
 //	Main Mem specific variables
-/*	boolean			MainPresent;
-	memptr			MainMemPages[PMMaxMainMem];
+	//boolean			MainPresent;
+/*	memptr			MainMemPages[PMMaxMainMem];
 	PMBlockAttr		gvar->pm.mm.MainMemUsed[PMMaxMainMem];
-	int				gvar->pm.mm.MainPagesAvail;
+	int				gvar->pm.mm.MainPagesAvail;*/
 
 //	EMS specific variables
-	boolean			EMSPresent;
-	word			gvar->pm.emm.EMSAvail,gvar->pm.emm.EMSPagesAvail,gvar->pm.emm.EMSHandle,
+	//boolean			EMSPresent;
+/*	word			gvar->pm.emm.EMSAvail,gvar->pm.emm.EMSPagesAvail,gvar->pm.emm.EMSHandle,
 					gvar->pm.emm.EMSPageFrame,gvar->pm.emm.EMSPhysicalPage;
-	gvar->pm.emm.EMSListStruct	gvar->pm.emm.EMSList[EMSFrameCount];
+	gvar->pm.emm.EMSListStruct	gvar->pm.emm.EMSList[EMSFrameCount];*/
 
 //	XMS specific variables
-	boolean			XMSPresent;
-	word			gvar->pm.xmm.XMSAvail,gvar->pm.xmm.XMSPagesAvail,gvar->pm.xmm.XMSHandle;*/
-	word		XMSDriver;
+	//boolean			XMSPresent;
+	//word			gvar->pm.xmm.XMSAvail,gvar->pm.xmm.XMSPagesAvail,gvar->pm.xmm.XMSHandle;
+	dword			XMSDriver;	//hard to put in gvar
+	word				XMSVer;	//hard to put in gvar
 /*	int				gvar->pm.xmm.XMSProtectPage = -1;
 
 //	File specific variables
 	char			gvar->pm.fi.PageFileName[13] = {"VSWAP."};
 	int				PageFile = -1;
 	word			gvar->pm.fi.ChunksInFile;
-	word			PMSpriteStart,PMSoundStart;
+	word			PMSpriteStart,PMSoundStart;*/
 
 //	General usage variables
-	boolean			PMStarted,
+/*	boolean			PMStarted,
 					gvar->pm.PMPanicMode,
 					gvar->pm.PMThrashing;
 	word			gvar->pm.XMSPagesUsed,
@@ -67,9 +68,28 @@ boolean debugpm=0;
 					gvar->pm.PMNumBlocks;
 	long			PMFrameCount;
 	PageListStruct	far *gvar->pm.PMPages,
-					_seg *gvar->pm.PMSegPages;
-*/
-boolean		PMStarted, MainPresent, EMSPresent, XMSPresent;
+					_seg *gvar->pm.PMSegPages;*/
+
+static union REGS CPURegs;
+
+#define _AX CPURegs.x.ax
+#define _BX CPURegs.x.bx
+#define _CX CPURegs.x.cx
+#define _DX CPURegs.x.dx
+
+#define _SI CPURegs.x.si
+
+#define _AH CPURegs.h.ah
+#define _AL CPURegs.h.al
+#define _BH CPURegs.h.bh
+#define _BL CPURegs.h.bl
+#define _CH CPURegs.h.ch
+#define _CL CPURegs.h.cl
+#define _DH CPURegs.h.dh
+#define _DL CPURegs.h.dl
+
+#define geninterrupt(n) int86(n,&CPURegs,&CPURegs);
+
 static	char		*ParmStrings[] = {"nomain","noems","noxms",nil};
 
 /////////////////////////////////////////////////////////////////////////////
@@ -84,11 +104,11 @@ static	char		*ParmStrings[] = {"nomain","noems","noxms",nil};
 byte
 PML_MapEMS(word logical, byte physical, global_game_variables_t *gvar)
 {
-	byte	str[160];
+	byte	err=0, str[160];
 	unsigned	EMShandle;
-	byte err;
+	//int	i;
+
 	boolean	errorflag=false;
-	int	i;
 	EMShandle=gvar->pm.emm.EMSHandle;
 
 	__asm {
@@ -98,12 +118,12 @@ PML_MapEMS(word logical, byte physical, global_game_variables_t *gvar)
 		mov	dx,EMShandle
 		int	EMS_INT
 		or	ah,ah
-		jnz	error
-		jmp End
+		jnz	errorme
+		jmp	Endme
 #ifdef __BORLANDC__
 	}
 #endif
-		error:
+		errorme:
 #ifdef __BORLANDC__
 	__asm {
 #endif
@@ -112,7 +132,7 @@ PML_MapEMS(word logical, byte physical, global_game_variables_t *gvar)
 #ifdef __BORLANDC__
 	}
 #endif
-		End:
+		Endme:
 #ifdef __WATCOMC__
 	}
 #endif
@@ -140,28 +160,28 @@ boolean
 PML_StartupEMS(global_game_variables_t *gvar)
 {
 	int		i;
-	long	size;
-	byte	str[160];
-	byte err;
+	//long	size;
+	byte	err=0, str[64];
 
-	boolean errorflag=0;
+	boolean errorflag=false;
 	static char	emmname[] = "EMMXXXX0";	//fix by andrius4669
 	unsigned int EMSVer = 0;
-	unsigned	totalEMSpages,freeEMSpages,EMSPageFrame,EMSHandle,EMSAvail;
+	unsigned	totalEMSpages,freeEMSpages,EMSPageFrame,EMSHandle=0,EMSAvail=0;
 	totalEMSpages = freeEMSpages = EMSPageFrame = 0;
-	EMSPresent = false;			// Assume that we'll fail
+	gvar->pm.emm.EMSPresent = false;			// Assume that we'll fail
 	gvar->pm.emm.EMSAvail = 0;
+	gvar->mmi.EMSmem = 0;
 
 	__asm {
 		mov	dx,OFFSET emmname	//fix by andrius4669
 		mov	ax,0x3d00
-		int	EMS_INT		// try to open EMMXXXX0 device
+		int	EMM_INT		// try to open EMMXXXX0 device
 		jc	error1
 
 		mov	bx,ax
 		mov	ax,0x4400
 
-		int	EMS_INT		// get device info
+		int	EMM_INT		// get device info
 		jc	error1
 
 		and	dx,0x80
@@ -169,13 +189,13 @@ PML_StartupEMS(global_game_variables_t *gvar)
 
 		mov	ax,0x4407
 
-		int	EMS_INT		// get status
+		int	EMM_INT		// get status
 		jc	error1
 		or	al,al
 		jz	error1
 
 		mov	ah,0x3e
-		int	EMS_INT		// close handle
+		int	EMM_INT		// close handle
 		jc	error1
 
 		mov	ah,EMS_STATUS
@@ -226,6 +246,7 @@ End1:
 #ifdef __WATCOMC__
 	}
 #endif
+/*
 	if(errorflag==false)
 	{
 		// Don't hog all available EMS
@@ -236,7 +257,7 @@ End1:
 			gvar->pm.emm.EMSAvail = size / EMSPageSize;
 		}
 	}
-
+*/
 	__asm {
 		mov	ah,EMS_ALLOCPAGES
 		mov	bx,[EMSAvail];
@@ -265,7 +286,7 @@ End2:
 
 	if(errorflag==false)
 	{
-	gvar->mmi.EMSmem += gvar->pm.emm.EMSAvail * (long)EMSPageSize;
+	gvar->mmi.EMSmem = EMSAvail * (dword)EMSPageSize;
 
 	// Initialize EMS mapping cache
 	for (i = 0;i < EMSFrameCount;i++)
@@ -277,16 +298,18 @@ End2:
 		strcpy(str,"PML_StartupEMS: EMS error ");
 		MM_EMSerr(str, err);
 		printf("%s\n",str);
-		return(EMSPresent);
+		return(gvar->pm.emm.EMSPresent);
 	}
 
-	EMSPresent = true;			// We have EMS
+	gvar->pm.emm.EMSPresent = true;			// We have EMS
 	gvar->pm.emm.EMSPageFrame = EMSPageFrame;
 	gvar->pm.emm.EMSAvail = EMSAvail;
 	gvar->pm.emm.EMSVer = EMSVer;
 	gvar->pm.emm.EMSHandle = EMSHandle;
+	gvar->pm.emm.freeEMSpages = freeEMSpages;
+	gvar->pm.emm.totalEMSpages = totalEMSpages;
 
-	return(EMSPresent);
+	return(gvar->pm.emm.EMSPresent);
 }
 
 //
@@ -296,17 +319,41 @@ void
 PML_ShutdownEMS(global_game_variables_t *gvar)
 {
 	word EMSHandle;
+	byte err=0, str[64];
+
+	boolean errorflag=false;
 	EMSHandle=gvar->pm.emm.EMSHandle;
 
-	if (EMSPresent)
+	if (gvar->pm.emm.EMSPresent)
 	{
 		__asm {
 			mov	ah,EMS_FREEPAGES
 			mov	dx,[EMSHandle]
 			int	EMS_INT
+			jc	errores
+			jmp	Endes
+#ifdef __BORLANDC__
+		}
+#endif
+			errores:
+#ifdef __BORLANDC__
+		__asm {
+#endif
+			mov	err,ah
+			mov	errorflag,1
+			jmp	Endes
+#ifdef __BORLANDC__
 		}
-		if (_AH)
+#endif
+			Endes:
+#ifdef __WATCOMC__
+		}
+#endif
+		if(errorflag==true)
 		{
+			strcpy(str,"PML_ShutdownEMS: Error freeing EMS ");
+			MM_EMSerr(str, err);
+			printf("%s\n",str);
 			Quit("PML_ShutdownEMS: Error freeing EMS\n");
 			//return;
 		}
@@ -328,46 +375,144 @@ PML_ShutdownEMS(global_game_variables_t *gvar)
 boolean
 PML_StartupXMS(global_game_variables_t *gvar)
 {
-	XMSPresent = false;					// Assume failure
-	gvar->pm.xmm.XMSAvail = 0;
-
-	_AX=0x4300;
-	geninterrupt(XMS_INT);         				// Check for presence of XMS driver
-	if (_AL != 0x80)
-		goto error;
-
+//TODO: translate the _REG into working assembly
+//#define STARTUPXMSASM
+	byte err;
+	word XMSAvail, XMSHandle;//, XMSVer;
+	boolean errorflag=false;
+	word e=0;
+	gvar->pm.xmm.XMSPresent = false;					// Assume failure
+	XMSAvail = gvar->mmi.XMSmem = 0;
 
 	__asm {
+		mov	ax,0x4300
+		int	XMS_INT         				// Check for presence of XMS driver
+		cmp	al,0x80
+		jne	error1
+		mov	e,1
+
 		mov	ax,0x4310
 		int	XMS_INT							// Get address of XMS driver
 		mov	[WORD PTR XMSDriver],bx
 		mov	[WORD PTR XMSDriver+2],es		// function pointer to XMS driver
-	}
 
+		mov	ah,XMS_VERSION
+		call	[DWORD PTR XMSDriver]						//; Get XMS Version Number
+		mov	[XMSVer],ax
+		mov	e,2
+
+#ifdef STARTUPXMSASM
+		mov	ah,XMS_QUERYFREE			// Find out how much XMS is available
+		call	[DWORD PTR XMSDriver]
+		mov	XMSAvail,ax
+		or	ax,ax				// AJR: bugfix 10/8/92
+		jz	error1
+		mov	e,3
+#endif
+		jmp	End1
+#ifdef __BORLANDC__
+	}
+#endif
+	error1:
+#ifdef __BORLANDC__
+	__asm {
+#endif
+		mov	err,bl
+		mov	errorflag,1
+		jmp End1
+#ifdef __BORLANDC__
+	}
+#endif
+End1:
+#ifdef __WATCOMC__
+	}
+#endif
+	if(errorflag==true) goto error;
+#ifndef STARTUPXMSASM
 	XMS_CALL(XMS_QUERYFREE);			// Find out how much XMS is available
-	gvar->pm.xmm.XMSAvail = _AX;
+	XMSAvail = _AX;
 	if (!_AX)				// AJR: bugfix 10/8/92
+	{
+		errorflag = true;
+		err = _BL;
 		goto error;
+	}
+	e++;
+#endif
 
-	gvar->pm.xmm.XMSAvail &= ~(PMPageSizeKB - 1);	// Round off to nearest page size
-	if (gvar->pm.xmm.XMSAvail < (PMPageSizeKB * 2))	// Need at least 2 pages
+#ifdef __DEBUG_PM__
+	printf("XMSVer=%02X	", XMSVer);
+	printf("XMSAvail=%u\n", XMSAvail);
+	getch();
+#endif
+	XMSAvail &= ~(PMPageSizeKB - 1);	// Round off to nearest page size
+	if (XMSAvail < (PMPageSizeKB * 2))	// Need at least 2 pages
+	{
+		errorflag=true;
 		goto error;
-
-	_DX = gvar->pm.xmm.XMSAvail;
+	}
+#ifdef STARTUPXMSASM
+	__asm {
+		mov	dx,XMSAvail
+		mov	ah,XMS_ALLOC				// And do the allocation
+		call	[DWORD PTR XMSDriver]
+		mov	XMSHandle,dx
+		or	ax,ax				// AJR: bugfix 10/8/92
+		jz	error2
+		mov	e,4
+		jmp	End2
+#ifdef __BORLANDC__
+	}
+#endif
+	error2:
+#ifdef __BORLANDC__
+	__asm {
+#endif
+		mov	err,bl
+		mov	errorflag,1
+		jmp End2
+#ifdef __BORLANDC__
+	}
+#endif
+End2:
+#ifdef __WATCOMC__
+	}
+#endif
+#else
+	_DX = XMSAvail;
 	XMS_CALL(XMS_ALLOC);				// And do the allocation
-	gvar->pm.xmm.XMSHandle = _DX;
-
+	XMSHandle = _DX;
 	if (!_AX)				// AJR: bugfix 10/8/92
 	{
-		gvar->pm.xmm.XMSAvail = 0;
+		errorflag=true;
+		err = _BL;
 		goto error;
 	}
-
-	gvar->mmi.XMSmem += gvar->pm.xmm.XMSAvail * 1024;
-
-	XMSPresent = true;
+	e++;
+#endif
 error:
-	return(XMSPresent);
+	if(errorflag==false)
+	{
+		gvar->mmi.XMSmem = (dword)(XMSAvail) * 1024;
+		gvar->pm.xmm.XMSAvail = XMSAvail;
+		gvar->pm.xmm.XMSHandle = XMSHandle;
+		//gvar->pm.xmm.XMSVer = XMSVer;
+		gvar->pm.xmm.XMSPresent = true;
+#ifdef __DEBUG_PM__
+		printf("	XMSmem=%lu	XMSAvail=%u\n", gvar->mmi.XMSmem, XMSAvail);
+#endif
+	}
+	else
+	{
+#ifdef __DEBUG_PM__
+		//printf("XMSHandle\n");
+		//printf("	1=%u	2=%u	3=%u	4=%u\n", XMSHandle1, XMSHandle2, XMSHandle3, XMSHandle4);
+		//printf("	2=%u	", XMSHandle);
+		//printf("	%u", gvar->pm.xmm.XMSHandle);
+		printf("	err=%02X	e=%u\n", err, e);
+#endif
+	}
+	return(gvar->pm.xmm.XMSPresent);
 }
 
 //
@@ -447,11 +592,36 @@ PML_CopyFromXMS(byte far *target,int sourcepage,word length, global_game_variabl
 void
 PML_ShutdownXMS(global_game_variables_t *gvar)
 {
-	if (XMSPresent)
+	boolean errorflag=false;
+	word XMSHandle = gvar->pm.xmm.XMSHandle;
+	if (gvar->pm.xmm.XMSPresent)
 	{
-		_DX = gvar->pm.xmm.XMSHandle;
-		XMS_CALL(XMS_FREE);
-		if (_BL)
+		__asm {
+			mov	dx,[XMSHandle]
+			//XMS_CALL(XMS_FREE);
+			mov	ah,XMS_FREE
+			call	[DWORD PTR XMSDriver]
+			or	bl,bl
+			jz	errorxs
+			jmp	Endxs
+#ifdef __BORLANDC__
+		}
+#endif
+			errorxs:
+#ifdef __BORLANDC__
+		__asm {
+#endif
+			//mov	err,ah
+			mov	errorflag,1
+			jmp	Endxs
+#ifdef __BORLANDC__
+		}
+#endif
+			Endxs:
+#ifdef __WATCOMC__
+		}
+#endif
+		if(errorflag==true)
 		{
 			Quit("PML_ShutdownXMS: Error freeing XMS");
 			//return;
@@ -475,16 +645,12 @@ PM_SetMainMemPurge(int level, global_game_variables_t *gvar)
 {
 	int	i;
 
-	if(MainPresent)
+	if(gvar->pm.mm.MainPresent)
 	for (i = 0;i < PMMaxMainMem;i++)
 	{
 #ifdef __DEBUG_PM__
 		printf("PM_SetMainMemPurge()	info of gvar->pm.mm.MainMemPages[i]\n");
-		//printf("	%Fp,	%Fp\n", gvar->pm.mm.MainMemPages[i],		(gvar->pm.mm.MainMemPages[i]));
 		printf("&	%Fp,	%Fp\n", &gvar->pm.mm.MainMemPages[i],	&(gvar->pm.mm.MainMemPages[i]));
-		//MM_ShowMemory(gvar);
-		//MM_DumpData(gvar);
-		//MM_Report_(gvar);
 #endif
 		if (gvar->pm.mm.MainMemPages[i])
 			MM_SetPurge(&(gvar->pm.mm.MainMemPages[i]),level, gvar);
@@ -492,9 +658,7 @@ PM_SetMainMemPurge(int level, global_game_variables_t *gvar)
 
 	else
 	{
-		printf("MainPresent IS NULL\n");
-		printf("%x	", MainPresent);
-		exit(-4);
+		Quit("MainPresent IS NULL\n");
 	}
 }
 
@@ -520,7 +684,7 @@ PM_CheckMainMem(global_game_variables_t *gvar)
 	PMBlockAttr		*used;
 	PageListStruct	far *page;
 
-	if (!MainPresent)
+	if (!gvar->pm.mm.MainPresent)
 		return;
 
 	for (i = 0,page = gvar->pm.PMPages;i < gvar->pm.fi.ChunksInFile;i++,page++)
@@ -583,15 +747,12 @@ PM_CheckMainMem(global_game_variables_t *gvar)
 void
 PML_StartupMainMem(global_game_variables_t *gvar)
 {
-	int		i,n;
+	int		i;//,n;
 	memptr	*p;
 
 	gvar->pm.mm.MainPagesAvail = 0;
-	MainPresent = false;
+	gvar->pm.mm.MainPresent = false;
 	MM_BombOnError(false, gvar);
-	printf("PML_StartupMainMem()\n");
-	printf("	p=%04x	MainMemPages=%04x\n", p, gvar->pm.mm.MainMemPages);
-	printf("	p=%Fp	MainMemPages=%Fp\n", p, gvar->pm.mm.MainMemPages);
 	for (i = 0,p = gvar->pm.mm.MainMemPages;i < PMMaxMainMem;i++,p++)
 	{
 		MM_GetPtr(p,PMPageSize, gvar);
@@ -609,7 +770,7 @@ PML_StartupMainMem(global_game_variables_t *gvar)
 		Quit("PM_SetupMainMem: Not enough main memory");
 		//return;
 	}
-	MainPresent = true;
+	gvar->pm.mm.MainPresent = true;
 }
 
 //
@@ -679,10 +840,7 @@ PML_OpenPageFile(global_game_variables_t *gvar)
 	gvar->pm.fi.PageFile = open(gvar->pm.fi.PageFileName,O_RDONLY + O_BINARY);
 	if (gvar->pm.fi.PageFile == -1)
 	{
-		//Quit("PML_OpenPageFile: Unable to open page file");
-		printf("PML_OpenPageFile: Unable to open page file");
-		printf(": %s\n", gvar->pm.fi.PageFileName);
-		exit(-1);
+		Quit("PML_OpenPageFile: Unable to open page file");
 		//return;
 	}
 
@@ -904,7 +1062,7 @@ PML_PutPageInXMS(int pagenum, global_game_variables_t *gvar)
 	int				usexms;
 	PageListStruct	far *page;
 
-	if (!XMSPresent)
+	if (!gvar->pm.xmm.XMSPresent)
 		return;
 
 	page = &gvar->pm.PMPages[pagenum];
@@ -1033,7 +1191,7 @@ PML_GetPageFromXMS(int pagenum,boolean mainonly, global_game_variables_t *gvar)
 	PageListStruct	far *page;
 
 	page = &gvar->pm.PMPages[pagenum];
-	if (XMSPresent && (page->xmsPage != -1))
+	if (gvar->pm.xmm.XMSPresent && (page->xmsPage != -1))
 	{
 		gvar->pm.xmm.XMSProtectPage = pagenum;
 		checkaddr = PML_GetAPageBuffer(pagenum,mainonly, gvar);
@@ -1147,15 +1305,15 @@ PM_SetPageLock(int pagenum,PMLockType lock, global_game_variables_t *gvar)
 void
 PM_Preload(boolean (*update)(word current,word total), global_game_variables_t *gvar)
 {
-	int				i,j,
+	int				i,//j,
 					page,oogypage;
 	word			current,total,
-					totalnonxms,totalxms,
+					//totalnonxms,totalxms,
 					mainfree,maintotal,
-					emsfree,emstotal,
+					//emstotal,emsfree,
 					xmsfree,xmstotal;
 	memptr			addr;
-	PageListStruct	far *p;
+	PageListStruct	__far *p;
 
 	mainfree = (gvar->pm.mm.MainPagesAvail - gvar->pm.MainPagesUsed) + (gvar->pm.emm.EMSPagesAvail - gvar->pm.EMSPagesUsed);
 	xmsfree = (gvar->pm.xmm.XMSPagesAvail - gvar->pm.XMSPagesUsed);
@@ -1347,29 +1505,15 @@ PM_Startup(global_game_variables_t *gvar)
 	boolean	nomain,noems,noxms;
 	int		i;
 
-	if (PMStarted)
+	if (gvar->pm.PMStarted)
 		return;
 
-	strcpy(&(gvar->pm.fi.PageFileName), "VSWAP.");
+	//strcpy(&(gvar->pm.fi.PageFileName), "VSWAP.");
 
 	nomain = noems = noxms = false;
-	for (i = 1;i <
-#ifdef __WATCOMC__
-	__argc
-#endif
-#ifdef __BORLANDC__
-	_argc
-#endif
-	;i++)
+	for (i = 1;i < _argc;i++)
 	{
-		switch (US_CheckParm(
-#ifdef __WATCOMC__
-	__argv[i]
-#endif
-#ifdef __BORLANDC__
-	_argv[i]
-#endif
-		,ParmStrings))
+		switch (US_CheckParm(_argv[i],ParmStrings))
 		{
 		case 0:
 			nomain = true;
@@ -1383,24 +1527,24 @@ PM_Startup(global_game_variables_t *gvar)
 		}
 	}
 
-	PML_OpenPageFile(gvar);
+	//0000+=+=PML_OpenPageFile(gvar);
 
-	if (!noems)
+	if (!noems && MML_CheckForEMS())
 		PML_StartupEMS(gvar);
-	if (!noxms)
+	if (!noxms && MML_CheckForXMS())
 		PML_StartupXMS(gvar);
+	if(!nomain)
+		PML_StartupMainMem(gvar);
 
-	if (nomain && !EMSPresent)
+	if (!gvar->pm.mm.MainPresent && !gvar->pm.emm.EMSPresent && !gvar->pm.xmm.XMSPresent)
 	{
 		Quit("PM_Startup: No main or EMS\n");
 		//return;
 	}
-	printf("PML_StartupMainMem\n");
-	PML_StartupMainMem(gvar);
 
 	PM_Reset(gvar);
 
-	PMStarted = true;
+	gvar->pm.PMStarted = true;
 }
 
 //
@@ -1409,13 +1553,13 @@ PM_Startup(global_game_variables_t *gvar)
 void
 PM_Shutdown(global_game_variables_t *gvar)
 {
-	PML_ShutdownXMS(gvar);
-	PML_ShutdownEMS(gvar);
+	if(MML_CheckForXMS()) PML_ShutdownXMS(gvar);
+	if(MML_CheckForEMS()) PML_ShutdownEMS(gvar);
 
-	if (!PMStarted)
+	if (!gvar->pm.PMStarted)
 		return;
 
-	PML_ClosePageFile(gvar);
+	//PML_ClosePageFile(gvar);
 
 	PML_ShutdownMainMem(gvar);
 }