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ROM list by game code rather than CRC

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StapleButter
2018-12-31 04:35:58 +01:00
parent 5533d9dc94
commit f6b979357f
2 changed files with 11 additions and 10 deletions
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BIN
romlist.bin
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21
src/NDSCart.cpp
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@ -809,11 +809,11 @@ void ApplyDLDIPatch()
} }
bool ReadROMParams(u32* params) bool ReadROMParams(u32 gamecode, u32* params)
{ {
// format for romlist.bin: // format for romlist.bin:
// [CRC32] [ROM size] [save type] [reserved] // [gamecode] [ROM size] [save type] [reserved]
// list must be sorted by CRC // list must be sorted by gamecode
FILE* f = melon_fopen_local("romlist.bin", "rb"); FILE* f = melon_fopen_local("romlist.bin", "rb");
if (!f) return false; if (!f) return false;
@ -827,13 +827,13 @@ bool ReadROMParams(u32* params)
u32 chk_size = len >> 1; u32 chk_size = len >> 1;
for (;;) for (;;)
{ {
u32 crc = 0; u32 key = 0;
fseek(f, offset + (chk_size << 4), SEEK_SET); fseek(f, offset + (chk_size << 4), SEEK_SET);
fread(&crc, 4, 1, f); fread(&key, 4, 1, f);
printf("chk_size=%d, crc=%08X, wanted=%08X, offset=%08X\n", chk_size, crc, CartCRC, offset); printf("chk_size=%d, key=%08X, wanted=%08X, offset=%08X\n", chk_size, key, gamecode, offset);
if (crc == CartCRC) if (key == gamecode)
{ {
fread(params, 4, 3, f); fread(params, 4, 3, f);
fclose(f); fclose(f);
@ -841,7 +841,7 @@ bool ReadROMParams(u32* params)
} }
else else
{ {
if (crc < CartCRC) if (key < gamecode)
{ {
if (chk_size == 0) if (chk_size == 0)
offset += 0x10; offset += 0x10;
@ -889,6 +889,7 @@ bool LoadROM(const char* path, const char* sram, bool direct)
u32 gamecode; u32 gamecode;
fseek(f, 0x0C, SEEK_SET); fseek(f, 0x0C, SEEK_SET);
fread(&gamecode, 4, 1, f); fread(&gamecode, 4, 1, f);
printf("Game code: %c%c%c%c\n", gamecode&0xFF, (gamecode>>8)&0xFF, (gamecode>>16)&0xFF, gamecode>>24);
CartROM = new u8[CartROMSize]; CartROM = new u8[CartROMSize];
memset(CartROM, 0, CartROMSize); memset(CartROM, 0, CartROMSize);
@ -902,7 +903,7 @@ bool LoadROM(const char* path, const char* sram, bool direct)
printf("ROM CRC32: %08X\n", CartCRC); printf("ROM CRC32: %08X\n", CartCRC);
u32 romparams[3]; u32 romparams[3];
if (!ReadROMParams(romparams)) if (!ReadROMParams(gamecode, romparams))
{ {
// set defaults // set defaults
printf("ROM entry not found\n"); printf("ROM entry not found\n");
@ -923,7 +924,7 @@ bool LoadROM(const char* path, const char* sram, bool direct)
// it just has to stay the same throughout gameplay // it just has to stay the same throughout gameplay
CartID = 0x000000C2; CartID = 0x000000C2;
if (CartROMSize <= 128*1024*1024) if (CartROMSize >= 1024*1024 && CartROMSize <= 128*1024*1024)
CartID |= ((CartROMSize >> 20) - 1) << 8; CartID |= ((CartROMSize >> 20) - 1) << 8;
else else
CartID |= (0x100 - (CartROMSize >> 28)) << 8; CartID |= (0x100 - (CartROMSize >> 28)) << 8;