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memmap.c
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/***********************************************************************************
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
(c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com),
Jerremy Koot (jkoot@snes9x.com)
(c) Copyright 2002 - 2004 Matthew Kendora
(c) Copyright 2002 - 2005 Peter Bortas (peter@bortas.org)
(c) Copyright 2004 - 2005 Joel Yliluoma (http://iki.fi/bisqwit/)
(c) Copyright 2001 - 2006 John Weidman (jweidman@slip.net)
(c) Copyright 2002 - 2006 funkyass (funkyass@spam.shaw.ca),
Kris Bleakley (codeviolation@hotmail.com)
(c) Copyright 2002 - 2010 Brad Jorsch (anomie@users.sourceforge.net),
Nach (n-a-c-h@users.sourceforge.net),
zones (kasumitokoduck@yahoo.com)
(c) Copyright 2006 - 2007 nitsuja
(c) Copyright 2009 - 2010 BearOso,
OV2
BS-X C emulator code
(c) Copyright 2005 - 2006 Dreamer Nom,
zones
C4 x86 assembler and some C emulation code
(c) Copyright 2000 - 2003 _Demo_ (_demo_@zsnes.com),
Nach,
zsKnight (zsknight@zsnes.com)
C4 C++ code
(c) Copyright 2003 - 2006 Brad Jorsch,
Nach
DSP-1 emulator code
(c) Copyright 1998 - 2006 _Demo_,
Andreas Naive (andreasnaive@gmail.com),
Gary Henderson,
Ivar (ivar@snes9x.com),
John Weidman,
Kris Bleakley,
Matthew Kendora,
Nach,
neviksti (neviksti@hotmail.com)
DSP-2 emulator code
(c) Copyright 2003 John Weidman,
Kris Bleakley,
Lord Nightmare (lord_nightmare@users.sourceforge.net),
Matthew Kendora,
neviksti
DSP-3 emulator code
(c) Copyright 2003 - 2006 John Weidman,
Kris Bleakley,
Lancer,
z80 gaiden
DSP-4 emulator code
(c) Copyright 2004 - 2006 Dreamer Nom,
John Weidman,
Kris Bleakley,
Nach,
z80 gaiden
OBC1 emulator code
(c) Copyright 2001 - 2004 zsKnight,
pagefault (pagefault@zsnes.com),
Kris Bleakley
Ported from x86 assembler to C by sanmaiwashi
SPC7110 and RTC C++ emulator code used in 1.39-1.51
(c) Copyright 2002 Matthew Kendora with research by
zsKnight,
John Weidman,
Dark Force
SPC7110 and RTC C++ emulator code used in 1.52+
(c) Copyright 2009 byuu,
neviksti
S-DD1 C emulator code
(c) Copyright 2003 Brad Jorsch with research by
Andreas Naive,
John Weidman
S-RTC C emulator code
(c) Copyright 2001 - 2006 byuu,
John Weidman
ST010 C++ emulator code
(c) Copyright 2003 Feather,
John Weidman,
Kris Bleakley,
Matthew Kendora
Super FX x86 assembler emulator code
(c) Copyright 1998 - 2003 _Demo_,
pagefault,
zsKnight
Super FX C emulator code
(c) Copyright 1997 - 1999 Ivar,
Gary Henderson,
John Weidman
Sound emulator code used in 1.5-1.51
(c) Copyright 1998 - 2003 Brad Martin
(c) Copyright 1998 - 2006 Charles Bilyue'
Sound emulator code used in 1.52+
(c) Copyright 2004 - 2007 Shay Green (gblargg@gmail.com)
SH assembler code partly based on x86 assembler code
(c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se)
2xSaI filter
(c) Copyright 1999 - 2001 Derek Liauw Kie Fa
HQ2x, HQ3x, HQ4x filters
(c) Copyright 2003 Maxim Stepin (maxim@hiend3d.com)
NTSC filter
(c) Copyright 2006 - 2007 Shay Green
GTK+ GUI code
(c) Copyright 2004 - 2010 BearOso
Win32 GUI code
(c) Copyright 2003 - 2006 blip,
funkyass,
Matthew Kendora,
Nach,
nitsuja
(c) Copyright 2009 - 2010 OV2
Mac OS GUI code
(c) Copyright 1998 - 2001 John Stiles
(c) Copyright 2001 - 2010 zones
(c) Copyright 2010 - 2016 Daniel De Matteis. (UNDER NO CIRCUMSTANCE
WILL COMMERCIAL RIGHTS EVER BE APPROPRIATED TO ANY PARTY)
Specific ports contains the works of other authors. See headers in
individual files.
Snes9x homepage: http://www.snes9x.com/
Permission to use, copy, modify and/or distribute Snes9x in both binary
and source form, for non-commercial purposes, is hereby granted without
fee, providing that this license information and copyright notice appear
with all copies and any derived work.
This software is provided 'as-is', without any express or implied
warranty. In no event shall the authors be held liable for any damages
arising from the use of this software or it's derivatives.
Snes9x is freeware for PERSONAL USE only. Commercial users should
seek permission of the copyright holders first. Commercial use includes,
but is not limited to, charging money for Snes9x or software derived from
Snes9x, including Snes9x or derivatives in commercial game bundles, and/or
using Snes9x as a promotion for your commercial product.
The copyright holders request that bug fixes and improvements to the code
should be forwarded to them so everyone can benefit from the modifications
in future versions.
Super NES and Super Nintendo Entertainment System are trademarks of
Nintendo Co., Limited and its subsidiary companies.
***********************************************************************************/
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include "snes9x.h"
#include "memmap.h"
#include "getset.h"
#include "apu.h"
#include "fxinst.h"
#include "fxemu.h"
#include "sdd1.h"
#include "srtc.h"
#include "controls.h"
#include "cheats.h"
#include "display.h"
#include "spc7110dec.h"
#include <streams/file_stream.h>
#include <libretro.h>
void S9xAppendMapping(struct retro_memory_descriptor *desc);
/* Forward declarations. */
static bool8 InitROM (void);
#define MAP_LIBRETRO_RAW(flags, ptr, offset, start, select, disconnect, len) \
do { \
struct retro_memory_descriptor desc={flags, ptr, offset, start, select, disconnect, len, NULL}; \
S9xAppendMapping(&desc); \
} while(0)
#define MAP_LIBRETRO(flags, ptr, offset, disconnect, len, bank_s,bank_e,addr_s,addr_e) \
MAP_LIBRETRO_RAW(flags, ptr, offset, \
(bank_s<<16 | addr_s), ((bank_s<<16 | addr_s) ^ (bank_e<<16 | addr_e) ^ 0xFFFFFF), \
disconnect, len)
static const uint32 crc32Table[256] =
{
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
};
/* deinterleave*/
static void S9xDeinterleaveType1 (int size, uint8 *base)
{
uint8 *tmp;
uint8 blocks[256], b;
int nblocks;
int i, j;
nblocks = size >> 16;
for ( i = 0; i < nblocks; i++)
{
blocks[i * 2] = i + nblocks;
blocks[i * 2 + 1] = i;
}
tmp = (uint8 *) malloc(0x8000);
if (tmp)
{
for ( i = 0; i < nblocks * 2; i++)
{
for ( j = i; j < nblocks * 2; j++)
{
if (blocks[j] == i)
{
memcpy(tmp, &base[blocks[j] * 0x8000], 0x8000);
memmove(&base[blocks[j] * 0x8000], &base[blocks[i] * 0x8000], 0x8000);
memcpy(&base[blocks[i] * 0x8000], tmp, 0x8000);
b = blocks[j];
blocks[j] = blocks[i];
blocks[i] = b;
break;
}
}
}
free(tmp);
}
}
static void S9xDeinterleaveType2 (int size, uint8 *base)
{
/* for odd Super FX images */
uint8 *tmp;
uint8 blocks[256], b;
int nblocks, step, i, j;
nblocks = size >> 16;
step = 64;
while (nblocks <= step)
step >>= 1;
nblocks = step;
for ( i = 0; i < nblocks * 2; i++)
blocks[i] = (i & ~0xf) | ((i & 3) << 2) | ((i & 12) >> 2);
tmp = (uint8 *) malloc(0x10000);
if (tmp)
{
for ( i = 0; i < nblocks * 2; i++)
{
for ( j = i; j < nblocks * 2; j++)
{
if (blocks[j] == i)
{
memcpy(tmp, &base[blocks[j] * 0x10000], 0x10000);
memmove(&base[blocks[j] * 0x10000], &base[blocks[i] * 0x10000], 0x10000);
memcpy(&base[blocks[i] * 0x10000], tmp, 0x10000);
b = blocks[j];
blocks[j] = blocks[i];
blocks[i] = b;
break;
}
}
}
free(tmp);
}
}
static void S9xDeinterleaveGD24 (int size, uint8 *base)
{
uint8 *tmp;
/* for 24Mbit images dumped with Game Doctor */
if (size != 0x300000)
return;
tmp = (uint8 *) malloc(0x80000);
if (tmp)
{
memcpy(tmp, &base[0x180000], 0x80000);
memcpy(&base[0x180000], &base[0x200000], 0x80000);
memcpy(&base[0x200000], &base[0x280000], 0x80000);
memcpy(&base[0x280000], tmp, 0x80000);
free(tmp);
S9xDeinterleaveType1(size, base);
}
}
/* allocation and deallocation */
bool8 Init (void)
{
Memory.RAM = (uint8 *) malloc(0x20000);
Memory.SRAM = (uint8 *) malloc(0x80000);
Memory.VRAM = (uint8 *) malloc(0x10000);
Memory.ROM = (uint8 *) malloc(MAX_ROM_SIZE + 0x200 + 0x8000);
IPPU.TileCache[TILE_2BIT] = (uint8 *) malloc(MAX_2BIT_TILES * 64);
IPPU.TileCache[TILE_4BIT] = (uint8 *) malloc(MAX_4BIT_TILES * 64);
IPPU.TileCache[TILE_8BIT] = (uint8 *) malloc(MAX_8BIT_TILES * 64);
IPPU.TileCache[TILE_2BIT_EVEN] = (uint8 *) malloc(MAX_2BIT_TILES * 64);
IPPU.TileCache[TILE_2BIT_ODD] = (uint8 *) malloc(MAX_2BIT_TILES * 64);
IPPU.TileCache[TILE_4BIT_EVEN] = (uint8 *) malloc(MAX_4BIT_TILES * 64);
IPPU.TileCache[TILE_4BIT_ODD] = (uint8 *) malloc(MAX_4BIT_TILES * 64);
IPPU.TileCached[TILE_2BIT] = (uint8 *) malloc(MAX_2BIT_TILES);
IPPU.TileCached[TILE_4BIT] = (uint8 *) malloc(MAX_4BIT_TILES);
IPPU.TileCached[TILE_8BIT] = (uint8 *) malloc(MAX_8BIT_TILES);
IPPU.TileCached[TILE_2BIT_EVEN] = (uint8 *) malloc(MAX_2BIT_TILES);
IPPU.TileCached[TILE_2BIT_ODD] = (uint8 *) malloc(MAX_2BIT_TILES);
IPPU.TileCached[TILE_4BIT_EVEN] = (uint8 *) malloc(MAX_4BIT_TILES);
IPPU.TileCached[TILE_4BIT_ODD] = (uint8 *) malloc(MAX_4BIT_TILES);
/* don't render subscreen speed hack - disable this by default by
turning the variable (RenderSub - opposite of don't render sub) on */
PPU.RenderSub = TRUE;
PPU.FullClipping = TRUE;
coldata_update_screen = TRUE;
if (!Memory.RAM || !Memory.SRAM || !Memory.VRAM || !Memory.ROM ||
!IPPU.TileCache[TILE_2BIT] ||
!IPPU.TileCache[TILE_4BIT] ||
!IPPU.TileCache[TILE_8BIT] ||
!IPPU.TileCache[TILE_2BIT_EVEN] ||
!IPPU.TileCache[TILE_2BIT_ODD] ||
!IPPU.TileCache[TILE_4BIT_EVEN] ||
!IPPU.TileCache[TILE_4BIT_ODD] ||
!IPPU.TileCached[TILE_2BIT] ||
!IPPU.TileCached[TILE_4BIT] ||
!IPPU.TileCached[TILE_8BIT] ||
!IPPU.TileCached[TILE_2BIT_EVEN] ||
!IPPU.TileCached[TILE_2BIT_ODD] ||
!IPPU.TileCached[TILE_4BIT_EVEN] ||
!IPPU.TileCached[TILE_4BIT_ODD])
{
Deinit();
return (FALSE);
}
memset(Memory.RAM, 0, 0x20000);
memset(Memory.SRAM, 0, 0x80000);
memset(Memory.VRAM, 0, 0x10000);
memset(Memory.ROM, 0, MAX_ROM_SIZE + 0x200 + 0x8000);
memset(IPPU.TileCache[TILE_2BIT], 0, MAX_2BIT_TILES * 64);
memset(IPPU.TileCache[TILE_4BIT], 0, MAX_4BIT_TILES * 64);
memset(IPPU.TileCache[TILE_8BIT], 0, MAX_8BIT_TILES * 64);
memset(IPPU.TileCache[TILE_2BIT_EVEN], 0, MAX_2BIT_TILES * 64);
memset(IPPU.TileCache[TILE_2BIT_ODD], 0, MAX_2BIT_TILES * 64);
memset(IPPU.TileCache[TILE_4BIT_EVEN], 0, MAX_4BIT_TILES * 64);
memset(IPPU.TileCache[TILE_4BIT_ODD], 0, MAX_4BIT_TILES * 64);
memset(IPPU.TileCached[TILE_2BIT], 0, MAX_2BIT_TILES);
memset(IPPU.TileCached[TILE_4BIT], 0, MAX_4BIT_TILES);
memset(IPPU.TileCached[TILE_8BIT], 0, MAX_8BIT_TILES);
memset(IPPU.TileCached[TILE_2BIT_EVEN], 0, MAX_2BIT_TILES);
memset(IPPU.TileCached[TILE_2BIT_ODD], 0, MAX_2BIT_TILES);
memset(IPPU.TileCached[TILE_4BIT_EVEN], 0, MAX_4BIT_TILES);
memset(IPPU.TileCached[TILE_4BIT_ODD], 0, MAX_4BIT_TILES);
/* FillRAM uses first 32K of ROM image area, otherwise space just
wasted. Might be read by the SuperFX code. */
Memory.FillRAM = Memory.ROM;
/* Add 0x8000 to ROM image pointer to stop SuperFX code accessing
unallocated memory (can cause crash on some ports). */
Memory.ROM += 0x8000;
Memory.C4RAM = Memory.ROM + 0x400000 + 8192 * 8; /* C4 */
Memory.OBC1RAM = Memory.ROM + 0x400000; /* OBC1 */
Memory.BIOSROM = Memory.ROM + 0x300000; /* BS */
Memory.BSRAM = Memory.ROM + 0x400000; /* BS */
SuperFX.pvRegisters = Memory.FillRAM + 0x3000;
SuperFX.nRamBanks = 2; /* Most only use 1. 1=64KB=512Mb, 2=128KB=1024Mb */
SuperFX.pvRam = Memory.SRAM;
SuperFX.nRomBanks = (2 * 1024 * 1024) / (32 * 1024);
SuperFX.pvRom = (uint8 *) Memory.ROM;
return (TRUE);
}
static char * Safe (const char *s)
{
static char *safe = NULL;
static int safe_len = 0;
int i, len;
if (s == NULL)
{
if (safe)
{
free(safe);
safe = NULL;
}
return (NULL);
}
len = strlen(s);
if (!safe || len + 1 > safe_len)
{
if (safe)
free(safe);
safe_len = len + 1;
safe = (char *) malloc(safe_len);
}
for ( i = 0; i < len; i++)
{
if (s[i] >= 32 && s[i] < 127)
safe[i] = s[i];
else
safe[i] = '_';
}
safe[len] = 0;
return (safe);
}
static char * SafeANK (uint8 ROMRegion, const char *s)
{
static char *safe = NULL;
static int safe_len = 0;
int i, len;
if (s == NULL)
{
if (safe)
{
free(safe);
safe = NULL;
}
return (NULL);
}
len = strlen(s);
if (!safe || len + 1 > safe_len)
{
if (safe)
free(safe);
safe_len = len + 1;
safe = (char *) malloc(safe_len);
}
for ( i = 0; i < len; i++)
{
if (s[i] >= 32 && s[i] < 127) /* ASCII */
safe [i] = s[i];
else
if (ROMRegion == 0 && ((uint8) s[i] >= 0xa0 && (uint8) s[i] < 0xe0)) /* JIS X 201 - Katakana */
safe [i] = s[i];
else
safe [i] = '_';
}
safe [len] = 0;
return (safe);
}
void Deinit (void)
{
int t;
if (Memory.RAM)
{
free(Memory.RAM);
Memory.RAM = NULL;
}
if (Memory.SRAM)
{
free(Memory.SRAM);
Memory.SRAM = NULL;
}
if (Memory.VRAM)
{
free(Memory.VRAM);
Memory.VRAM = NULL;
}
if (Memory.ROM)
{
Memory.ROM -= 0x8000;
free(Memory.ROM);
Memory.ROM = NULL;
}
if(Settings.SPC7110 || Settings.SPC7110RTC)
{
S9xFreeSPC7110();
}
for ( t = 0; t < 7; t++)
{
if (IPPU.TileCache[t])
{
free(IPPU.TileCache[t]);
IPPU.TileCache[t] = NULL;
}
if (IPPU.TileCached[t])
{
free(IPPU.TileCached[t]);
IPPU.TileCached[t] = NULL;
}
}
Safe(NULL);
SafeANK(Memory.ROMRegion, NULL);
}
/* file management and ROM detection */
static bool8 allASCII (uint8 *b, int size)
{
int i;
for ( i = 0; i < size; i++)
{
if (b[i] < 32 || b[i] > 126)
return (FALSE);
}
return (TRUE);
}
#if SNES_SUPPORT_MULTI_CART
static bool8 is_SufamiTurbo_BIOS (uint8 *data, uint32 size)
{
if (size == 0x40000 && strncmp((char *) data, "BANDAI SFC-ADX", 14) == 0
&& strncmp((char * ) (data + 0x10), "SFC-ADX BACKUP", 14) == 0)
return TRUE;
return FALSE;
}
static bool8 is_SufamiTurbo_Cart (uint8 *data, uint32 size)
{
if (size >= 0x80000 && size <= 0x100000 && strncmp((char *) data, "BANDAI SFC-ADX", 14) == 0
&& strncmp((char * ) (data + 0x10), "SFC-ADX BACKUP", 14) != 0)
return TRUE;
return FALSE;
}
static bool8 is_SameGame_BIOS (uint8 *data, uint32 size)
{
if (size == 0x100000 && strncmp((char *) (data + 0xffc0), "Same Game Tsume Game", 20) == 0)
return (TRUE);
return (FALSE);
}
static bool8 is_SameGame_Add_On (uint8 *data, uint32 size)
{
if (size == 0x80000)
return (TRUE);
return (FALSE);
}
#endif
static int ScoreHiROM (uint32 calculated_size, uint8 * rom, bool8 skip_header, int32 romoff)
{
uint8 *buf;
int score;
score = 0;
buf = rom + 0xff00 + romoff + (skip_header ? 0x200 : 0);
if (buf[0xd5] & 0x1)
score += 2;
/* Mode23 is SA-1 */
if (buf[0xd5] == 0x23)
score -= 2;
if (buf[0xd4] == 0x20)
score += 2;
if ((buf[0xdc] + (buf[0xdd] << 8)) + (buf[0xde] + (buf[0xdf] << 8)) == 0xffff)
{
score += 2;
if (0 != (buf[0xde] + (buf[0xdf] << 8)))
score++;
}
if (buf[0xda] == 0x33)
score += 2;
if ((buf[0xd5] & 0xf) < 4)
score += 2;
if (!(buf[0xfd] & 0x80))
score -= 6;
if ((buf[0xfc] + (buf[0xfd] << 8)) > 0xffb0)
score -= 2; /* reduced after looking at a scan by Cowering */
if (calculated_size > 1024 * 1024 * 3)
score += 4;
if ((1 << (buf[0xd7] - 7)) > 48)
score -= 1;
if (!allASCII(&buf[0xb0], 6))
score -= 1;
if (!allASCII(&buf[0xc0], ROM_NAME_LEN - 1))
score -= 1;
return (score);
}
static int ScoreLoROM (uint32 calculated_size, uint8 * rom, bool8 skip_header, int32 romoff)
{
uint8 *buf;
int score;
score = 0;
buf = rom + 0x7f00 + romoff + (skip_header ? 0x200 : 0);
if (!(buf[0xd5] & 0x1))
score += 3;
/* Mode23 is SA-1 */
if (buf[0xd5] == 0x23)
score += 2;
if ((buf[0xdc] + (buf[0xdd] << 8)) + (buf[0xde] + (buf[0xdf] << 8)) == 0xffff)
{
score += 2;
if (0 != (buf[0xde] + (buf[0xdf] << 8)))
score++;
}
if (buf[0xda] == 0x33)
score += 2;
if ((buf[0xd5] & 0xf) < 4)
score += 2;
if (!(buf[0xfd] & 0x80))
score -= 6;
if ((buf[0xfc] + (buf[0xfd] << 8)) > 0xffb0)
score -= 2; /* reduced per Cowering suggestion */
if (calculated_size <= 1024 * 1024 * 16)
score += 2;
if ((1 << (buf[0xd7] - 7)) > 48)
score -= 1;
if (!allASCII(&buf[0xb0], 6))
score -= 1;
if (!allASCII(&buf[0xc0], ROM_NAME_LEN - 1))
score -= 1;
return (score);
}
static uint32 HeaderRemove (uint32 size, int32 * headerCount, uint8 *buf)
{
uint32 calc_size = (size / 0x2000) * 0x2000;
if (size - calc_size == 512)
{
memmove(buf, buf + 512, calc_size);
(*headerCount)++;
size -= 512;
}
return (size);
}
static uint32 FileLoader (uint8 *buffer, int32 maxsize)
{
/* <- ROM size without header */
/* ** Memory.HeaderCount */
/* ** Memory.ROMFilename */
uint8 *ptr;
uint64_t size = 0;
STREAM fp = OPEN_STREAM(0);
Memory.HeaderCount = 0;
if (!fp)
return (0);
ptr = buffer;
size = READ_STREAM(ptr, (uint64_t)(
maxsize + 0x200), fp);
CLOSE_STREAM(fp);
return HeaderRemove(size, &Memory.HeaderCount, ptr);
}
static uint32 caCRC32 (uint8 *array, uint32 size, uint32 crc32)
{
uint32 i;
for ( i = 0; i < size; i++)
crc32 = ((crc32 >> 8) & 0x00FFFFFF) ^ crc32Table[(crc32 ^ array[i]) & 0xFF];
return (~crc32);
}
bool8 LoadROM (void)
{
int hi_score, lo_score, retry_count;
bool8 interleaved, tales;
uint8 * RomHeader;
int32 totalFileSize;
retry_count = 0;
memset(Memory.ROM, 0, MAX_ROM_SIZE);
memset(&Multi, 0, sizeof(Multi));
again:
Memory.CalculatedSize = 0;
Memory.ExtendedFormat = NOPE;
totalFileSize = FileLoader(Memory.ROM, MAX_ROM_SIZE);
if (!totalFileSize)
{
S9xMessage(S9X_MSG_ERROR, S9X_CATEGORY_ROM,
"Unable to load ROM");
return FALSE;
}
hi_score = ScoreHiROM(Memory.CalculatedSize, Memory.ROM, FALSE, 0);
lo_score = ScoreLoROM(Memory.CalculatedSize, Memory.ROM, FALSE, 0);
if (Memory.HeaderCount == 0 && !Settings.ForceNoHeader &&
((hi_score > lo_score && ScoreHiROM(Memory.CalculatedSize, Memory.ROM, TRUE, 0) > hi_score) ||
(hi_score <= lo_score && ScoreLoROM(Memory.CalculatedSize, Memory.ROM, TRUE, 0) > lo_score)))
{
memmove(Memory.ROM, Memory.ROM + 512, totalFileSize - 512);
totalFileSize -= 512;
S9xMessage(S9X_MSG_INFO, S9X_CATEGORY_ROM, "Try 'force no-header' option if the game doesn't work");
/* modifying ROM, so we need to rescore */
hi_score = ScoreHiROM(Memory.CalculatedSize, Memory.ROM, FALSE, 0);
lo_score = ScoreLoROM(Memory.CalculatedSize, Memory.ROM, FALSE, 0);
}
Memory.CalculatedSize = (totalFileSize / 0x2000) * 0x2000;
if (Memory.CalculatedSize > 0x400000 &&
(Memory.ROM[0x7fd5] + (Memory.ROM[0x7fd6] << 8)) != 0x4332 && /* exclude S-DD1 */
(Memory.ROM[0x7fd5] + (Memory.ROM[0x7fd6] << 8)) != 0x4532 &&
(Memory.ROM[0xffd5] + (Memory.ROM[0xffd6] << 8)) != 0xF93a && /* exclude SPC7110 */
(Memory.ROM[0xffd5] + (Memory.ROM[0xffd6] << 8)) != 0xF53a)
Memory.ExtendedFormat = YEAH;
/* if both vectors are invalid, it's type 1 interleaved LoROM */
if (Memory.ExtendedFormat == NOPE &&
((Memory.ROM[0x7ffc] + (Memory.ROM[0x7ffd] << 8)) < 0x8000) &&
((Memory.ROM[0xfffc] + (Memory.ROM[0xfffd] << 8)) < 0x8000))
{
if (!Settings.ForceInterleaved && !Settings.ForceNotInterleaved)
S9xDeinterleaveType1(totalFileSize, Memory.ROM);
}
/* CalculatedSize is now set, so rescore */
hi_score = ScoreHiROM(Memory.CalculatedSize, Memory.ROM, FALSE, 0);
lo_score = ScoreLoROM(Memory.CalculatedSize, Memory.ROM, FALSE, 0);
RomHeader = Memory.ROM;
if (Memory.ExtendedFormat != NOPE)
{
int swappedhirom, swappedlorom;
swappedhirom = ScoreHiROM(Memory.CalculatedSize, Memory.ROM, FALSE, 0x400000);
swappedlorom = ScoreLoROM(Memory.CalculatedSize, Memory.ROM, FALSE, 0x400000);
/* set swapped here */
if (max(swappedlorom, swappedhirom) >= max(lo_score, hi_score))
{
Memory.ExtendedFormat = BIGFIRST;
hi_score = swappedhirom;
lo_score = swappedlorom;
RomHeader += 0x400000;
}
else
Memory.ExtendedFormat = SMALLFIRST;
}
interleaved = FALSE;
tales = FALSE;
interleaved = Settings.ForceInterleaved || Settings.ForceInterleaved2 || Settings.ForceInterleaveGD24;
if (Settings.ForceLoROM || (!Settings.ForceHiROM && lo_score >= hi_score))
{
Memory.LoROM = TRUE;
Memory.HiROM = FALSE;
/* ignore map type byte if not 0x2x or 0x3x */
if ((RomHeader[0x7fd5] & 0xf0) == 0x20 || (RomHeader[0x7fd5] & 0xf0) == 0x30)
{
switch (RomHeader[0x7fd5] & 0xf)
{
case 1:
interleaved = TRUE;
break;
case 5:
interleaved = TRUE;
tales = TRUE;
break;
}
}
}
else
{
Memory.LoROM = FALSE;
Memory.HiROM = TRUE;
if ((RomHeader[0xffd5] & 0xf0) == 0x20 || (RomHeader[0xffd5] & 0xf0) == 0x30)
{
switch (RomHeader[0xffd5] & 0xf)
{
case 0:
case 3:
interleaved = TRUE;
break;
}
}
}
/* these two games fail to be detected otherwise */
if (!Settings.ForceHiROM && !Settings.ForceLoROM)
{
if (strncmp((char *) &Memory.ROM[0x7fc0], "YUYU NO QUIZ DE GO!GO!", 22) == 0 ||
(strncmp((char *) &Memory.ROM[0xffc0], "BATMAN--REVENGE JOKER", 21) == 0))
{
Memory.LoROM = TRUE;
Memory.HiROM = FALSE;
interleaved = FALSE;
tales = FALSE;
}
}
if (!Settings.ForceNotInterleaved && interleaved)
{
S9xMessage(S9X_MSG_INFO, S9X_CATEGORY_ROM, "ROM image is in interleaved format - converting...");
if (tales)
{
if (Memory.ExtendedFormat == BIGFIRST)
{
S9xDeinterleaveType1(0x400000, Memory.ROM);
S9xDeinterleaveType1(Memory.CalculatedSize - 0x400000, Memory.ROM + 0x400000);
}
else
{
S9xDeinterleaveType1(Memory.CalculatedSize - 0x400000, Memory.ROM);
S9xDeinterleaveType1(0x400000, Memory.ROM + Memory.CalculatedSize - 0x400000);
}
Memory.LoROM = FALSE;
Memory.HiROM = TRUE;
}
else
if (Settings.ForceInterleaveGD24 && Memory.CalculatedSize == 0x300000)
{
bool8 t = Memory.LoROM;
Memory.LoROM = Memory.HiROM;
Memory.HiROM = t;
S9xDeinterleaveGD24(Memory.CalculatedSize, Memory.ROM);
}
else
if (Settings.ForceInterleaved2)
S9xDeinterleaveType2(Memory.CalculatedSize, Memory.ROM);
else
{
bool8 t = Memory.LoROM;
Memory.LoROM = Memory.HiROM;
Memory.HiROM = t;
S9xDeinterleaveType1(Memory.CalculatedSize, Memory.ROM);
}
hi_score = ScoreHiROM(Memory.CalculatedSize, Memory.ROM, FALSE, 0);
lo_score = ScoreLoROM(Memory.CalculatedSize, Memory.ROM, FALSE, 0);
if ((Memory.HiROM && (lo_score >= hi_score || hi_score < 0)) ||
(Memory.LoROM && (hi_score > lo_score || lo_score < 0)))
{
if (retry_count == 0)
{
S9xMessage(S9X_MSG_INFO, S9X_CATEGORY_ROM, "ROM lied about its type! Trying again.");
Settings.ForceNotInterleaved = TRUE;
Settings.ForceInterleaved = FALSE;
retry_count++;
goto again;
}
}
}
if (Memory.ExtendedFormat == SMALLFIRST)
tales = TRUE;
if (tales)
{
uint8 *tmp = (uint8 *) malloc(Memory.CalculatedSize - 0x400000);
if (tmp)
{
S9xMessage(S9X_MSG_INFO, S9X_CATEGORY_ROM, "Fixing swapped ExHiROM...");
memcpy(tmp, Memory.ROM, Memory.CalculatedSize - 0x400000);
memmove(Memory.ROM, Memory.ROM + Memory.CalculatedSize - 0x400000, 0x400000);
memcpy(Memory.ROM + 0x400000, tmp, Memory.CalculatedSize - 0x400000);
free(tmp);
}
}