diff options
Diffstat (limited to 'NDSCart.cpp')
| -rw-r--r-- | NDSCart.cpp | 43 |
1 files changed, 40 insertions, 3 deletions
diff --git a/NDSCart.cpp b/NDSCart.cpp index 5334c15..37722db 100644 --- a/NDSCart.cpp +++ b/NDSCart.cpp @@ -38,6 +38,7 @@ bool CartInserted; u8* CartROM; u32 CartROMSize; u32 CartID; +bool CartIsHomebrew; u32 CmdEncMode; u32 DataEncMode; @@ -174,6 +175,7 @@ void Reset() CartROM = NULL; CartROMSize = 0; CartID = 0; + CartIsHomebrew = false; CmdEncMode = 0; DataEncMode = 0; @@ -213,6 +215,30 @@ void LoadROM(char* path) // it just has to stay the same throughout gameplay CartID = 0x00001FC2; + u32 arm9base = *(u32*)&CartROM[0x20]; + if (arm9base < 0x8000) + { + if (arm9base >= 0x4000) + { + // reencrypt secure area if needed + if (*(u32*)&CartROM[arm9base] == 0xE7FFDEFF) + { + printf("Re-encrypting cart secure area\n"); + + strncpy((char*)&CartROM[arm9base], "encryObj", 8); + + Key1_InitKeycode(gamecode, 3, 2); + for (u32 i = 0; i < 0x800; i += 8) + Key1_Encrypt((u32*)&CartROM[arm9base + i]); + + Key1_InitKeycode(gamecode, 2, 2); + Key1_Encrypt((u32*)&CartROM[arm9base]); + } + } + else + CartIsHomebrew = true; + } + // encryption Key1_InitKeycode(gamecode, 2, 2); } @@ -231,7 +257,11 @@ void ReadROM(u32 addr, u32 len, u32 offset) void ReadROM_B7(u32 addr, u32 len, u32 offset) { addr &= (CartROMSize-1); - if (addr < 0x8000) addr = 0x8000 + (addr & 0x1FF); + if (!CartIsHomebrew) + { + if (addr < 0x8000) + addr = 0x8000 + (addr & 0x1FF); + } memcpy(DataOut+offset, CartROM+addr, len); } @@ -318,11 +348,11 @@ void WriteCnt(u32 val) *(u32*)&cmd[4] = *(u32*)&ROMCommand[4]; } - printf("ROM COMMAND %04X %08X %02X%02X%02X%02X%02X%02X%02X%02X SIZE %04X\n", + /*printf("ROM COMMAND %04X %08X %02X%02X%02X%02X%02X%02X%02X%02X SIZE %04X\n", SPICnt, ROMCnt, cmd[0], cmd[1], cmd[2], cmd[3], cmd[4], cmd[5], cmd[6], cmd[7], - datasize); + datasize);*/ switch (cmd[0]) { @@ -380,6 +410,13 @@ void WriteCnt(u32 val) *(u32*)&DataOut[pos] = CartID; break; + case 0x20: + { + u32 addr = (cmd[2] & 0xF0) << 8; + ReadROM(addr, 0x1000, 0); + } + break; + case 0xA0: CmdEncMode = 2; break; |