ShuriZma
/
snes9x
mirror of https://github.com/snes9xgit/snes9x.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

[BS-X] MultiCart Loading for games with Memory Pack support 

I found out that my code only really works with HiROM games.
Maker games have issues since sx2 fork.
This commit is contained in:
luigiblood 2016-11-14 16:32:05 +01:00
parent 38b95261d0
commit 4c9feadc63
3 changed files with 98 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
bsx.cpp
View File

@ -673,18 +673,22 @@ static void BSX_Map (void)
static uint8 BSX_Get_Bypass_FlashIO (uint16 offset)
{
MapROM = FlashROM = Memory.ROM + Multi.cartOffsetB;
if (BSX.MMC[0x02])
return (MapROM[offset & 0x0FFFFF]);
else
return (MapROM[(offset & 0x0F0000) >> 1 | (offset & 0x7FFF)]);
return (MapROM[(offset & 0x1F0000) >> 1 | (offset & 0x7FFF)]);
}
static void BSX_Set_Bypass_FlashIO (uint16 offset, uint8 byte)
{
MapROM = FlashROM = Memory.ROM + Multi.cartOffsetB;
if (BSX.MMC[0x02])
MapROM[offset & 0x0FFFFF] = byte;
else
MapROM[(offset & 0x0F0000) >> 1 | (offset & 0x7FFF)] = byte;
MapROM[(offset & 0x1F0000) >> 1 | (offset & 0x7FFF)] = byte;
}
uint8 S9xGetBSX (uint32 address)

101
memmap.cpp
View File

@ -1231,8 +1231,20 @@ static bool8 is_SufamiTurbo_Cart (const uint8 *data, uint32 size)
static bool8 is_SameGame_BIOS (const uint8 *data, uint32 size)
{
if (size == 0x100000 && strncmp((char *) (data + 0xffc0), "Same Game Tsume Game", 20) == 0)
if ((data[0x7FB2] == 0x5A) && (data[0x7FB5] != 0x20) && (data[0x7FDA] == 0x33))
{
Memory.LoROM = TRUE;
Memory.HiROM = FALSE;
return (TRUE);
}
else if ((data[0xFFB2] == 0x5A) && (data[0xFFB5] != 0x20) && (data[0xFFDA] == 0x33))
{
Memory.LoROM = FALSE;
Memory.HiROM = TRUE;
return (TRUE);
}
else
return (FALSE);
}
@ -1977,19 +1989,15 @@ bool8 CMemory::LoadSameGame ()
Multi.sramA = SRAM;
Multi.sramB = NULL;
Multi.sramSizeA = ROM[0xffd8];
if (LoROM)
Multi.sramSizeA = ROM[0x7fd8];
else
Multi.sramSizeA = ROM[0xffd8];
Multi.sramMaskA = Multi.sramSizeA ? ((1 << (Multi.sramSizeA + 3)) * 128 - 1) : 0;
Multi.sramSizeB = 0;
Multi.sramMaskB = 0;
if (Multi.cartSizeB)
{
if (!is_SameGame_Add_On(ROM + Multi.cartOffsetB, Multi.cartSizeB))
Multi.cartSizeB = 0;
}
LoROM = FALSE;
HiROM = TRUE;
CalculatedSize = Multi.cartSizeA;
return (TRUE);
@ -2542,7 +2550,7 @@ void CMemory::InitROM (void)
Map_ExtendedHiROMMap();
else
if (Multi.cartType == 3)
Map_SameGameHiROMMap();
Map_BSCartHiROMMap();
else
Map_HiROMMap();
}
@ -2574,6 +2582,13 @@ void CMemory::InitROM (void)
if (strncmp(ROMName, "WANDERERS FROM YS", 17) == 0)
Map_NoMAD1LoROMMap();
else
if (Multi.cartType == 3)
if (strncmp(ROMName, "SOUND NOVEL-TCOOL", 17) == 0 ||
strncmp(ROMName, "DERBY STALLION 96", 17) == 0)
Map_BSCartLoROMMap(1);
else
Map_BSCartLoROMMap(0);
else
if (strncmp(ROMName, "SOUND NOVEL-TCOOL", 17) == 0 ||
strncmp(ROMName, "DERBY STALLION 96", 17) == 0)
Map_ROM24MBSLoROMMap();
@ -3363,6 +3378,70 @@ void CMemory::Map_SPC7110HiROMMap (void)
map_WriteProtectROM();
}
void CMemory::Map_BSCartLoROMMap(uint8 mapping)
{
printf("Map_BSCartLoROMMap\n");
BSX.MMC[0x02] = 0x00;
BSX.MMC[0x0C] = 0x80;
map_System();
if (mapping)
{
map_lorom_offset(0x00, 0x1f, 0x8000, 0xffff, 0x100000, 0);
map_lorom_offset(0x20, 0x3f, 0x8000, 0xffff, 0x100000, 0x100000);
map_lorom_offset(0x80, 0x9f, 0x8000, 0xffff, 0x100000, 0x200000);
map_lorom_offset(0xa0, 0xbf, 0x8000, 0xffff, 0x100000, 0x100000);
}
else
{
map_lorom(0x00, 0x3f, 0x8000, 0xffff, CalculatedSize);
map_lorom(0x40, 0x7f, 0x0000, 0x7fff, CalculatedSize);
map_lorom(0x80, 0xbf, 0x8000, 0xffff, CalculatedSize);
map_lorom(0xc0, 0xff, 0x0000, 0x7fff, CalculatedSize);
}
map_LoROMSRAM();
map_index(0xc0, 0xef, 0x0000, 0x7fff, MAP_BSX, MAP_TYPE_RAM);
map_index(0xc0, 0xef, 0x8000, 0xffff, MAP_BSX, MAP_TYPE_RAM);
map_WRAM();
map_WriteProtectROM();
}
void CMemory::Map_BSCartHiROMMap(void)
{
printf("Map_BSCartHiROMMap\n");
BSX.MMC[0x02] = 0x80;
BSX.MMC[0x0C] = 0x80;
map_System();
map_hirom_offset(0x00, 0x1f, 0x8000, 0xffff, Multi.cartSizeA, Multi.cartOffsetA);
map_hirom_offset(0x20, 0x3f, 0x8000, 0xffff, Multi.cartSizeB, Multi.cartOffsetB);
map_hirom_offset(0x40, 0x5f, 0x0000, 0xffff, Multi.cartSizeA, Multi.cartOffsetA);
map_hirom_offset(0x60, 0x7f, 0x0000, 0xffff, Multi.cartSizeB, Multi.cartOffsetB);
map_hirom_offset(0x80, 0x9f, 0x8000, 0xffff, Multi.cartSizeA, Multi.cartOffsetA);
map_hirom_offset(0xa0, 0xbf, 0x8000, 0xffff, Multi.cartSizeB, Multi.cartOffsetB);
map_hirom_offset(0xc0, 0xdf, 0x0000, 0xffff, Multi.cartSizeA, Multi.cartOffsetA);
if ((ROM[Multi.cartOffsetB + 0xFF00] == 0x4D)
&& (ROM[Multi.cartOffsetB + 0xFF02] == 0x50)
&& ((ROM[Multi.cartOffsetB + 0xFF06] & 0xF0) == 0x70))
{
//Type 7 Memory Pack detection - if detected, emulate it as Mask ROM
map_hirom_offset(0xe0, 0xff, 0x0000, 0xffff, Multi.cartSizeB, Multi.cartOffsetB);
}
else
map_index(0xe0, 0xff, 0x0000, 0xffff, MAP_BSX, MAP_TYPE_RAM);
map_HiROMSRAM();
map_WRAM();
map_WriteProtectROM();
}
// checksum
uint16 CMemory::checksum_calc_sum (uint8 *data, uint32 length)

2
memmap.h
View File

@ -331,6 +331,8 @@ struct CMemory
void Map_ExtendedHiROMMap (void);
void Map_SameGameHiROMMap (void);
void Map_SPC7110HiROMMap (void);
void Map_BSCartLoROMMap(uint8);
void Map_BSCartHiROMMap(void);
uint16 checksum_calc_sum (uint8 *, uint32);
uint16 checksum_mirror_sum (uint8 *, uint32 &, uint32 mask = 0x800000);