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support DSi-mode carts

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except they need to have the DSi-mode shit encrypted
This commit is contained in:
Arisotura
2019-08-04 16:46:02 +02:00
parent a9f36929e0
commit 36c741241a
5 changed files with 85 additions and 36 deletions
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87
src/NDSCart.cpp
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@ -475,6 +475,7 @@ u32 CartROMSize;
u32 CartCRC;
u32 CartID;
bool CartIsHomebrew;
bool CartIsDSi;
u32 CmdEncMode;
u32 DataEncMode;
@ -557,10 +558,13 @@ void Key1_ApplyKeycode(u32* keycode, u32 mod)
}
}
void Key1_InitKeycode(u32 idcode, u32 level, u32 mod)
void Key1_InitKeycode(bool dsi, u32 idcode, u32 level, u32 mod)
{
//memcpy(Key1_KeyBuf, &NDS::ARM7BIOS[0x30], 0x1048); // hax
memcpy(Key1_KeyBuf, &DSi::ITCMInit[0x4894], 0x1048); // hax
if (dsi)
memcpy(Key1_KeyBuf, &DSi::ARM7Init[0x254], 0x1048); // hax
else
memcpy(Key1_KeyBuf, &DSi::ITCMInit[0x4894], 0x1048); // hax
u32 keycode[3] = {idcode, idcode>>1, idcode<<1};
if (level >= 1) Key1_ApplyKeycode(keycode, mod);
@ -613,32 +617,19 @@ void DeInit()
void Reset()
{
SPICnt = 0;
ROMCnt = 0;
memset(ROMCommand, 0, 8);
ROMDataOut = 0;
Key2_X = 0;
Key2_Y = 0;
memset(DataOut, 0, 0x4000);
DataOutPos = 0;
DataOutLen = 0;
CartInserted = false;
if (CartROM) delete[] CartROM;
CartROM = NULL;
CartROMSize = 0;
CartID = 0;
CartIsHomebrew = false;
CartIsDSi = false;
ROMCommandHandler = NULL;
CmdEncMode = 0;
DataEncMode = 0;
NDSCart_SRAM::Reset();
ResetCart();
}
void DoSavestate(Savestate* file)
@ -893,6 +884,11 @@ bool LoadROM(const char* path, const char* sram, bool direct)
fread(&gamecode, 4, 1, f);
printf("Game code: %c%c%c%c\n", gamecode&0xFF, (gamecode>>8)&0xFF, (gamecode>>16)&0xFF, gamecode>>24);
u8 unitcode;
fseek(f, 0x12, SEEK_SET);
fread(&unitcode, 1, 1, f);
CartIsDSi = (unitcode & 0x02) != 0;
CartROM = new u8[CartROMSize];
memset(CartROM, 0, CartROMSize);
fseek(f, 0, SEEK_SET);
@ -934,6 +930,9 @@ bool LoadROM(const char* path, const char* sram, bool direct)
if (romparams[1] == 8)
CartID |= 0x08000000; // NAND flag
if (CartIsDSi)
CartID |= 0x40000000;
printf("Cart ID: %08X\n", CartID);
if (*(u32*)&CartROM[0x20] < 0x4000)
@ -969,11 +968,11 @@ bool LoadROM(const char* path, const char* sram, bool direct)
strncpy((char*)&CartROM[arm9base], "encryObj", 8);
Key1_InitKeycode(gamecode, 3, 2);
Key1_InitKeycode(false, gamecode, 3, 2);
for (u32 i = 0; i < 0x800; i += 8)
Key1_Encrypt((u32*)&CartROM[arm9base + i]);
Key1_InitKeycode(gamecode, 2, 2);
Key1_InitKeycode(false, gamecode, 2, 2);
Key1_Encrypt((u32*)&CartROM[arm9base]);
}
}
@ -981,9 +980,6 @@ bool LoadROM(const char* path, const char* sram, bool direct)
CartIsHomebrew = true;
}
// encryption
Key1_InitKeycode(gamecode, 2, 2);
// save
printf("Save file: %s\n", sram);
@ -998,6 +994,27 @@ void RelocateSave(const char* path, bool write)
NDSCart_SRAM::RelocateSave(path, write);
}
void ResetCart()
{
// CHECKME: what if there is a transfer in progress?
SPICnt = 0;
ROMCnt = 0;
memset(ROMCommand, 0, 8);
ROMDataOut = 0;
Key2_X = 0;
Key2_Y = 0;
memset(DataOut, 0, 0x4000);
DataOutPos = 0;
DataOutLen = 0;
CmdEncMode = 0;
DataEncMode = 0;
}
void ReadROM(u32 addr, u32 len, u32 offset)
{
if (!CartInserted) return;
@ -1172,7 +1189,7 @@ void WriteROMCnt(u32 val)
// handle KEY1 encryption as needed.
// KEY2 encryption is implemented in hardware and doesn't need to be handled.
u8 cmd[8];
if (CmdEncMode == 1)
if (CmdEncMode == 1 || CmdEncMode == 11)
{
*(u32*)&cmd[0] = ByteSwap(*(u32*)&ROMCommand[4]);
*(u32*)&cmd[4] = ByteSwap(*(u32*)&ROMCommand[0]);
@ -1218,11 +1235,23 @@ void WriteROMCnt(u32 val)
break;
case 0x3C:
if (CartInserted) CmdEncMode = 1;
if (CartInserted)
{
CmdEncMode = 1;
Key1_InitKeycode(false, *(u32*)&CartROM[0xC], 2, 2);
}
break;
case 0x3D:
if (CartInserted && CartIsDSi)
{
CmdEncMode = 11;
Key1_InitKeycode(true, *(u32*)&CartROM[0xC], 1, 2);
}
break;
default:
if (CmdEncMode == 1)
if (CmdEncMode == 1 || CmdEncMode == 11)
{
switch (cmd[0] & 0xF0)
{
@ -1238,6 +1267,12 @@ void WriteROMCnt(u32 val)
case 0x20:
{
u32 addr = (cmd[2] & 0xF0) << 8;
if (CmdEncMode == 11)
{
u32 arm9i_base = *(u32*)&CartROM[0x1C0];
addr -= 0x4000;
addr += arm9i_base;
}
ReadROM(addr, 0x1000, 0);
}
break;