From 6a958704433a1f1d67935c150db6cb50e27c3e9b Mon Sep 17 00:00:00 2001
From: tmaul <tmaul@f2e10478-e7fb-40a4-b0e2-024e28a34407>
Date: Sat, 14 Apr 2012 15:27:06 +0000
Subject: [PATCH] Start cleaning this mess up.

---
 src/burn/drv/snes/snes.h        |  16 +-
 src/burn/drv/snes/snes_main.cpp | 328 +++++++++++++++++++++++++++++++-
 src/burn/drv/snes/snes_mem.cpp  | 298 -----------------------------
 3 files changed, 326 insertions(+), 316 deletions(-)
 delete mode 100644 src/burn/drv/snes/snes_mem.cpp

diff --git a/src/burn/drv/snes/snes.h b/src/burn/drv/snes/snes.h
index df8887117..5d55d5b6a 100644
--- a/src/burn/drv/snes/snes.h
+++ b/src/burn/drv/snes/snes.h
@@ -152,15 +152,15 @@ extern UINT8 global_opcode;
 extern INT32 cycles;
 
 /*Memory*/
-extern UINT8 *ram;
-extern UINT8 *rom;
+extern UINT8 *SNES_ram;
+extern UINT8 *SNES_rom;
 extern UINT8 *memlookup[2048];
-extern UINT8 memread[2048],memwrite[2048];
-extern UINT8 accessspeed[2048];
+extern UINT8 *memread;
+extern UINT8 *memwrite;
+extern UINT8 *accessspeed;
 
 extern INT32 lorom;
-UINT8 readmeml(unsigned long adress);
-void writememl(unsigned long adress, unsigned char v);
+
 
 unsigned char snes_readmem(unsigned long adress);
 void snes_writemem(unsigned long ad, unsigned char v);
@@ -240,10 +240,10 @@ void resetsnem();
 void execframe();
 void loadrom(char *fn);
 
-void initmem();
+void snes_mapmem();
 void freemem();
 extern unsigned short srammask;
-extern unsigned char *sram;
+extern unsigned char *SNES_sram;
 extern INT32 spctotal;
 
 // snes_main.cpp
diff --git a/src/burn/drv/snes/snes_main.cpp b/src/burn/drv/snes/snes_main.cpp
index 33ee895fc..60f70a2ff 100644
--- a/src/burn/drv/snes/snes_main.cpp
+++ b/src/burn/drv/snes/snes_main.cpp
@@ -8,14 +8,312 @@ INT32 oldnmi=0;
 INT32 spcclck;
 double spcclck2,spcclck3;
 
+extern int pal;
+UINT16 srammask=0;
+
+
+static UINT8 *AllMem;
+static UINT8 *MemEnd;
+static UINT8 *AllRam;
+static UINT8 *RamEnd;
+
+UINT8 *SNES_sram;
+UINT8 *SNES_ram;
+UINT8 *SNES_rom;
+UINT8 *memlookup[2048];
+UINT8 *memread;
+UINT8 *memwrite;
+UINT8 *accessspeed;
+INT32 lorom;
+
+
+static INT32 MemIndex(UINT32 cart_size)
+{
+	UINT8 *Next; Next = AllMem;
+
+	SNES_rom	= Next; Next += cart_size;
+	// Technically these are not ram but need to be saved with machine state but not reset with machine
+	memread = Next; Next += 0x800;
+	memwrite = Next; Next += 0x800;
+	accessspeed =  Next; Next += 0x800;
+	AllRam		= Next;
+	// but these really are ram
+	SNES_ram	= Next; Next += 0x20000;
+	SNES_sram	= Next; Next += 0x2000; 
+	RamEnd		= Next;
+	MemEnd		= Next;
+
+	return 0;
+}
+
+
+void freemem()
+{
+	for (int i=0;i<2048;i++)
+	{
+		memlookup[i]=NULL;
+	}
+	BurnFree (AllMem);
+}
+
+
 void __cdecl snemlog(TCHAR *format,...)
 {
 	bprintf(0,format);
 }
 
+void snes_mapmem()
+{
+
+	int c,d;
+	for (c=0;c<0x800;c++)
+	{
+		memread[c]=0;
+		memwrite[c]=0;
+	}
+	if (lorom)
+	{
+		for (c=0;c<96;c++)
+		{
+			for (d=0;d<4;d++)
+			{
+				memread[(c<<3)|(d+4)]=1;
+				memlookup[(c<<3)|(d+4)]=&SNES_rom[((d*0x2000)+(c*0x8000))&0x3FFFFF];
+				memread[(c<<3)|(d+4)|0x400]=1;
+				memlookup[(c<<3)|(d+4)|0x400]=&SNES_rom[((d*0x2000)+(c*0x8000))&0x3FFFFF];
+
+			}
+			
+		}
+		
+		for (c=0;c<64;c++)
+		{
+			memread[(c<<3)|0]=memwrite[(c<<3)|0]=1;
+			memlookup[(c<<3)|0]=SNES_ram;
+		}
+		
+		for (c=0;c<64;c++)
+		{
+			memread[(c<<3)|0x400]=memwrite[(c<<3)|0x400]=1;
+			memlookup[(c<<3)|0x400]=SNES_ram;
+		}
+		
+		for (c=0;c<8;c++)
+		{
+			memread[(0x7E<<3)|c]=memwrite[(0x7E<<3)|c]=1;
+			memlookup[(0x7E<<3)|c]=&SNES_ram[c*0x2000];
+			memread[(0x7F<<3)|c]=memwrite[(0x7F<<3)|c]=1;
+			memlookup[(0x7F<<3)|c]=&SNES_ram[(c*0x2000)+0x10000];
+		}
+	
+	}
+	else
+	{
+		for (c=0;c<2048;c++)
+		{
+			memread[c]=1;
+			memwrite[c]=0;
+			memlookup[c]=&SNES_rom[(c*0x2000)&0x3FFFFF];
+		}
+		for (c=0;c<64;c++)
+		{
+			for (d=1;d<4;d++)
+			{
+				memread[(c<<3)+d]=memwrite[(c<<3)+d]=0;
+				memread[(c<<3)+d+1024]=memwrite[(c<<3)+d+1024]=0;
+			}
+		}
+		for (c=0;c<64;c++)
+		{
+			memread[(c<<3)|0]=memwrite[(c<<3)|0]=1;
+			memlookup[(c<<3)|0]=SNES_ram;
+			memread[(c<<3)|1024]=memwrite[(c<<3)|1024]=1;
+			memlookup[(c<<3)|1024]=SNES_ram;
+		}
+		for (c=0;c<8;c++)
+		{
+			memread[(0x7E<<3)|c]=memwrite[(0x7E<<3)|c]=1;
+			memlookup[(0x7E<<3)|c]=&SNES_ram[c*0x2000];
+			memread[(0x7F<<3)|c]=memwrite[(0x7F<<3)|c]=1;
+			memlookup[(0x7F<<3)|c]=&SNES_ram[(c*0x2000)+0x10000];
+		}
+		for (c=0;c<16;c++)
+		{
+			memread[(0x70<<3)+c]=memwrite[(0x70<<3)+c]=1;
+			memlookup[(0x70<<3)+c]=SNES_sram;
+		}
+	}
+	/*Set up access speed table*/
+	for (c=0;c<64;c++)
+	{
+		accessspeed[(c<<3)|0]=8;
+		accessspeed[(c<<3)|1]=6;
+		accessspeed[(c<<3)|2]=6;
+		accessspeed[(c<<3)|3]=6;
+		accessspeed[(c<<3)|4]=accessspeed[(c<<3)|5]=8;
+		accessspeed[(c<<3)|6]=accessspeed[(c<<3)|7]=8;
+	}
+	for (c=64;c<128;c++)
+	{
+		for (d=0;d<8;d++)
+		{
+			accessspeed[(c<<3)|d]=8;
+		}
+	}
+	for (c=128;c<192;c++)
+	{
+		accessspeed[(c<<3)|0]=8;
+		accessspeed[(c<<3)|1]=6;
+		accessspeed[(c<<3)|2]=6;
+		accessspeed[(c<<3)|3]=6;
+		accessspeed[(c<<3)|4]=accessspeed[(c<<3)|5]=8;
+		accessspeed[(c<<3)|6]=accessspeed[(c<<3)|7]=8;
+	}
+	for (c=192;c<256;c++)
+	{
+		for (d=0;d<8;d++)
+		{
+			accessspeed[(c<<3)|d]=8;
+		}
+	}
+}
+
+unsigned char snes_readmem(unsigned long addr)
+{
+	cycles-=accessspeed[(addr>>13)&0x7FF];
+	clockspc(accessspeed[(addr>>13)&0x7FF]);
+	if (memread[(addr>>13)&0x7FF])
+	{
+		return memlookup[(addr>>13)&0x7FF][addr&0x1FFF];
+	}
+	
+	addr&=~0xFF000000;
+
+	if (((addr>>16)&0x7F)<0x40)
+	{
+		switch (addr&0xF000)
+		{
+			case 0x2000:
+				return readppu(addr);
+			case 0x4000:
+				if ((addr&0xE00)==0x200)
+				{
+					return readio(addr);
+				}
+				if ((addr&0xFFFE)==0x4016)
+				{
+					return readjoyold(addr);
+				}
+				//snemlog(L"Bad Read %06X\n",addr);
+				return 0;
+			case 0x6000: 
+			case 0x7000:
+				if (!lorom) 
+				{
+					return SNES_sram[addr&srammask];
+				}
+			default:
+				//snemlog(L"Bad read %06X\n",addr);
+				return 0xFF;
+		}
+	}
+
+	if ((addr>>16)>=0xD0 && (addr>>16)<=0xFE) 
+	{
+		return 0;
+	}
+
+	if ((addr>>16)==0x70)
+	{
+		if (srammask)
+		{
+			return SNES_sram[addr&srammask];
+		}
+		return 0;
+	}
+
+	if ((addr>>16)==0x60) 
+	{
+		return 0;
+	}
+
+	//snemlog(L"Bad read %06X\n",addr);
+
+	return 0xff;
+}
+
+void snes_writemem(unsigned long addr, unsigned char val)
+{
+	cycles-=accessspeed[(addr>>13)&0x7FF];
+	clockspc(accessspeed[(addr>>13)&0x7FF]);
+	if (memwrite[(addr>>13)&0x7FF])
+	{
+		memlookup[(addr>>13)&0x7FF][(addr)&0x1FFF]=val;
+		return;
+	}
+	
+	addr&=~0xFF000000;
+	if (((addr>>16)&0x7F)<0x40)
+	{
+		switch (addr&0xF000)
+		{
+
+		case 0x2000:
+			writeppu(addr,val);
+			return;
+
+		case 0x3000:
+			return;
+
+		case 0x4000:
+			if ((addr&0xE00)==0x200)
+				writeio(addr,val);
+			if ((addr&0xFFFE)==0x4016)
+				writejoyold(addr,val);
+			return;
+
+		case 0x5000: 
+			return;
+
+		case 0x6000: 
+		case 0x7000:
+			if (!lorom)
+			{			
+				SNES_sram[addr&srammask]=val;
+			}
+			return;
+		case 0x8000: 
+		case 0x9000: 
+		case 0xA000: 
+		case 0xB000:
+		case 0xC000: 
+		case 0xD000: 
+		case 0xE000: 
+		case 0xF000:
+			return;
+		default:
+			break;
+			//snemlog(L"Bad write %06X %02X\n",addr,val);
+
+		}
+	}
+	
+	if ((addr>>16)>=0xD0 && (addr>>16)<=0xFE) 
+	{
+		return;
+	}
+
+	if ((addr>>16)==0x70)
+	{
+		SNES_sram[addr&srammask]=val;
+		return;
+	}
+}
+
 
 void SnesReset()
 {
+	memset (AllRam, 0, RamEnd - AllRam);
 	resetppu();
 	resetspc();
 	reset65816();
@@ -29,8 +327,18 @@ INT32 SnesInit()
 	char name[22];
 	INT32 len;
 	UINT16 temp,temp2;
-		
-	allocmem();
+	
+	struct BurnRomInfo ri;
+	BurnDrvGetRomInfo(&ri, 0);
+	UINT32 length = ri.nLen;
+	
+	AllMem = NULL;
+	MemIndex(length);
+	INT32 nLen = MemEnd - (UINT8 *)0;
+	if ((AllMem = (UINT8 *)BurnMalloc(nLen)) == NULL) return 1;
+	memset(AllMem, 0, nLen);
+	MemIndex(length);
+	
 	initppu();
 	initspc();
 	makeopcodetable();
@@ -41,12 +349,12 @@ INT32 SnesInit()
 
 	spccycles=-10000;
 
-	rom=(UINT8*)BurnMalloc(4096*1024);
-	BurnLoadRom(rom,0,0);
+
+	BurnLoadRom(SNES_rom,0,0);
 
 
-	temp=rom[0x7FDC]|(rom[0x7FDD]<<8);
-	temp2=rom[0x7FDE]|(rom[0x7FDF]<<8);
+	temp=SNES_rom[0x7FDC]|(SNES_rom[0x7FDD]<<8);
+	temp2=SNES_rom[0x7FDE]|(SNES_rom[0x7FDF]<<8);
 	if ((temp|temp2)==0xFFFF)
 	{
 		lorom=1;
@@ -56,12 +364,12 @@ INT32 SnesInit()
 		lorom=0;
 	}
 	
-	initmem();
+	snes_mapmem();
 	
 	if (((snes_readmem(0xFFFD)<<8)|snes_readmem(0xFFFC))==0xFFFF) 
 	{ 
 		lorom^=1; 
-		initmem(); 
+		snes_mapmem(); 
 	}
 
 	len=counter;//-0x10000;
@@ -89,10 +397,10 @@ INT32 SnesInit()
 
 	if (srammask)
 	{
-		memset(sram,0,srammask+1);
+		memset(SNES_sram,0,srammask+1);
 	}
 
-	memset(ram,0x55,128*1024);
+	memset(SNES_ram,0x55,128*1024);
 
 	SnesReset();
 	
diff --git a/src/burn/drv/snes/snes_mem.cpp b/src/burn/drv/snes/snes_mem.cpp
deleted file mode 100644
index 5d09d77e6..000000000
--- a/src/burn/drv/snes/snes_mem.cpp
+++ /dev/null
@@ -1,298 +0,0 @@
-#include <stdio.h>
-#include "snes.h"
-
-extern int pal;
-UINT16 srammask=0;
-
-UINT8 *sram;
-UINT8 *ram;
-UINT8 *rom;
-UINT8 *memlookup[2048];
-UINT8 memread[2048];
-UINT8 memwrite[2048];
-UINT8 accessspeed[2048];
-INT32 lorom;
-
-void allocmem()
-{
-	ram=(UINT8*)BurnMalloc(128*1024);
-	memset(ram,0x55,128*1024);
-	sram=(UINT8*)BurnMalloc(8192);
-	memset(sram,0,8192);
-}
-
-void freemem()
-{
-	for (int i=0;i<2048;i++)
-	{
-		memlookup[i]=NULL;
-		memread[i]=0;
-		memwrite[i]=0;
-		accessspeed[i]=0;
-
-	}
-	if (ram !=NULL)
-	{
-		BurnFree(ram);
-	}
-	if (sram!=NULL)
-	{
-		BurnFree(sram);
-	}
-	if (rom!=NULL)
-	{
-		BurnFree(rom);
-	}
-}
-
-
-void initmem()
-{
-
-	int c,d;
-	for (c=0;c<256;c++)
-	{
-		for (d=0;d<8;d++)
-		{
-			memread[(c<<3)|d]=memwrite[(c<<3)|d]=0;
-		}
-	}
-	if (lorom)
-	{
-		for (c=0;c<96;c++)
-		{
-			for (d=0;d<4;d++)
-			{
-				memread[(c<<3)|(d+4)]=1;
-				memlookup[(c<<3)|(d+4)]=&rom[((d*0x2000)+(c*0x8000))&0x3FFFFF];
-				memread[(c<<3)|(d+4)|0x400]=1;
-				memlookup[(c<<3)|(d+4)|0x400]=&rom[((d*0x2000)+(c*0x8000))&0x3FFFFF];
-			}
-		}
-		for (c=0;c<64;c++)
-		{
-			memread[(c<<3)|0]=memwrite[(c<<3)|0]=1;
-			memlookup[(c<<3)|0]=ram;
-		}
-		for (c=0;c<64;c++)
-		{
-			memread[(c<<3)|0x400]=memwrite[(c<<3)|0x400]=1;
-			memlookup[(c<<3)|0x400]=ram;
-		}
-		for (c=0;c<8;c++)
-		{
-			memread[(0x7E<<3)|c]=memwrite[(0x7E<<3)|c]=1;
-			memlookup[(0x7E<<3)|c]=&ram[c*0x2000];
-			memread[(0x7F<<3)|c]=memwrite[(0x7F<<3)|c]=1;
-			memlookup[(0x7F<<3)|c]=&ram[(c*0x2000)+0x10000];
-		}
-	
-	}
-	else
-	{
-		for (c=0;c<2048;c++)
-		{
-			memread[c]=1;
-			memwrite[c]=0;
-			memlookup[c]=&rom[(c*0x2000)&0x3FFFFF];
-		}
-		for (c=0;c<64;c++)
-		{
-			for (d=1;d<4;d++)
-			{
-				memread[(c<<3)+d]=memwrite[(c<<3)+d]=0;
-				memread[(c<<3)+d+1024]=memwrite[(c<<3)+d+1024]=0;
-			}
-		}
-		for (c=0;c<64;c++)
-		{
-			memread[(c<<3)|0]=memwrite[(c<<3)|0]=1;
-			memlookup[(c<<3)|0]=ram;
-			memread[(c<<3)|1024]=memwrite[(c<<3)|1024]=1;
-			memlookup[(c<<3)|1024]=ram;
-		}
-		for (c=0;c<8;c++)
-		{
-			memread[(0x7E<<3)|c]=memwrite[(0x7E<<3)|c]=1;
-			memlookup[(0x7E<<3)|c]=&ram[c*0x2000];
-			memread[(0x7F<<3)|c]=memwrite[(0x7F<<3)|c]=1;
-			memlookup[(0x7F<<3)|c]=&ram[(c*0x2000)+0x10000];
-		}
-		for (c=0;c<16;c++)
-		{
-			memread[(0x70<<3)+c]=memwrite[(0x70<<3)+c]=1;
-			memlookup[(0x70<<3)+c]=sram;
-		}
-	}
-	/*Set up access speed table*/
-	for (c=0;c<64;c++)
-	{
-		accessspeed[(c<<3)|0]=8;
-		accessspeed[(c<<3)|1]=6;
-		accessspeed[(c<<3)|2]=6;
-		accessspeed[(c<<3)|3]=6;
-		accessspeed[(c<<3)|4]=accessspeed[(c<<3)|5]=8;
-		accessspeed[(c<<3)|6]=accessspeed[(c<<3)|7]=8;
-	}
-	for (c=64;c<128;c++)
-	{
-		for (d=0;d<8;d++)
-		{
-			accessspeed[(c<<3)|d]=8;
-		}
-	}
-	for (c=128;c<192;c++)
-	{
-		accessspeed[(c<<3)|0]=8;
-		accessspeed[(c<<3)|1]=6;
-		accessspeed[(c<<3)|2]=6;
-		accessspeed[(c<<3)|3]=6;
-		accessspeed[(c<<3)|4]=accessspeed[(c<<3)|5]=8;
-		accessspeed[(c<<3)|6]=accessspeed[(c<<3)|7]=8;
-	}
-	for (c=192;c<256;c++)
-	{
-		for (d=0;d<8;d++)
-		{
-			accessspeed[(c<<3)|d]=8;
-		}
-	}
-}
-
-unsigned char readmeml(unsigned long addr)
-{
-	addr&=~0xFF000000;
-
-	if (((addr>>16)&0x7F)<0x40)
-	{
-		switch (addr&0xF000)
-		{
-			case 0x2000:
-				return readppu(addr);
-			case 0x4000:
-				if ((addr&0xE00)==0x200)
-				{
-					return readio(addr);
-				}
-				if ((addr&0xFFFE)==0x4016)
-				{
-					return readjoyold(addr);
-				}
-				//snemlog(L"Bad Read %06X\n",addr);
-				return 0;
-			case 0x6000: 
-			case 0x7000:
-				if (!lorom) 
-				{
-					return sram[addr&srammask];
-				}
-			default:
-				//snemlog(L"Bad read %06X\n",addr);
-				return 0xFF;
-		}
-	}
-
-	if ((addr>>16)>=0xD0 && (addr>>16)<=0xFE) 
-	{
-		return 0;
-	}
-
-	if ((addr>>16)==0x70)
-	{
-		if (srammask)
-		{
-			return sram[addr&srammask];
-		}
-		return 0;
-	}
-
-	if ((addr>>16)==0x60) 
-	{
-		return 0;
-	}
-
-	//snemlog(L"Bad read %06X\n",addr);
-
-	return 0xff;
-}
-
-void writememl(unsigned long addr, unsigned char val)
-{
-	addr&=~0xFF000000;
-	if (((addr>>16)&0x7F)<0x40)
-	{
-		switch (addr&0xF000)
-		{
-
-		case 0x2000:
-			writeppu(addr,val);
-			return;
-
-		case 0x3000:
-			return;
-
-		case 0x4000:
-			if ((addr&0xE00)==0x200)
-				writeio(addr,val);
-			if ((addr&0xFFFE)==0x4016)
-				writejoyold(addr,val);
-			return;
-
-		case 0x5000: 
-			return;
-
-		case 0x6000: 
-		case 0x7000:
-			if (!lorom) sram[addr&srammask]=val;
-			return;
-		case 0x8000: 
-		case 0x9000: 
-		case 0xA000: 
-		case 0xB000:
-		case 0xC000: 
-		case 0xD000: 
-		case 0xE000: 
-		case 0xF000:
-			return;
-		default:
-			break;
-			//snemlog(L"Bad write %06X %02X\n",addr,val);
-
-		}
-	}
-	
-	if ((addr>>16)>=0xD0 && (addr>>16)<=0xFE) 
-	{
-		return;
-	}
-
-	if ((addr>>16)==0x70)
-	{
-		sram[addr&srammask]=val;
-		return;
-	}
-
-	//snemlog(L"Bad write %06X %02X\n",addr,val);
-
-}
-
-unsigned char snes_readmem(unsigned long adress)
-{
-	cycles-=accessspeed[(adress>>13)&0x7FF];
-	clockspc(accessspeed[(adress>>13)&0x7FF]);
-	if (memread[(adress>>13)&0x7FF])
-	{
-		return memlookup[(adress>>13)&0x7FF][adress&0x1FFF];
-	}
-	return readmeml(adress);
-}
-
-void snes_writemem(unsigned long ad, unsigned char v)
-{
-	cycles-=accessspeed[(ad>>13)&0x7FF];
-	clockspc(accessspeed[(ad>>13)&0x7FF]);
-	if (memwrite[(ad>>13)&0x7FF])
-		memlookup[(ad>>13)&0x7FF][(ad)&0x1FFF]=v;
-	else
-		writememl(ad,v);
-}