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Add reading of NES 2.0 Misc. ROM data

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This commit is contained in:
NewRisingSun
2025-04-11 19:09:04 +02:00
committed by LibretroAdmin
parent c7b26c99e5
commit 658637a02a
2 changed files with 25 additions and 4 deletions
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3
src/cart.h
View File

@@ -26,6 +26,9 @@ typedef struct {
int CHRRamSize; /* chr ram size in bytes (volatile) */
int PRGRamSaveSize; /* prg ram size in bytes (non-volatile or battery backed) */
int CHRRamSaveSize; /* chr ram size in bytes (non-volatile or battery backed) */
int miscROMSize;
int miscROMNumber;
uint64 totalFileSize;
int region; /* video system timing (ntsc, pal, dendy */
uint8 MD5[16];

26
src/ines.c
View File

@@ -54,7 +54,6 @@ CartInfo iNESCart = {0};
uint32 ROM_size = 0;
uint32 VROM_size = 0;
uint32 MiscROM_size;
static int CHRRAMSize = -1;
@@ -109,6 +108,10 @@ static void iNESGI(int h) {
free(ExtraNTARAM);
ExtraNTARAM = NULL;
}
if (MiscROM) {
free(MiscROM);
MiscROM = NULL;
}
break;
}
}
@@ -939,6 +942,11 @@ static void iNES_read_header_info(void) {
if (head.PRGRAM_size & 0xF0) iNESCart.PRGRamSaveSize = 64 << ((head.PRGRAM_size >> 4) & 0x0F);
if (head.CHRRAM_size & 0x0F) iNESCart.CHRRamSize = 64 << ((head.CHRRAM_size >> 0) & 0x0F);
if (head.CHRRAM_size & 0xF0) iNESCart.CHRRamSaveSize = 64 << ((head.CHRRAM_size >> 4) & 0x0F);
iNESCart.PRGRomSize = ROM_size >=0xF00? (pow(2, head.ROM_size >>2)*((head.ROM_size &3)*2+1)): (ROM_size*0x4000);
iNESCart.CHRRomSize =VROM_size >=0xF00? (pow(2, head.VROM_size>>2)*((head.VROM_size&3)*2+1)): (VROM_size*0x2000);;
iNESCart.miscROMNumber =head.MiscRoms;
iNESCart.miscROMSize =iNESCart.miscROMNumber? (iNESCart.totalFileSize -16 -(head.ROM_type &4? 512: 0) -iNESCart.PRGRomSize -iNESCart.CHRRomSize): 0;
if (iNESCart.miscROMSize &0x8000000) iNESCart.miscROMSize =0;
}
}
@@ -981,6 +989,7 @@ int iNESLoad(const char *name, FCEUFILE *fp)
memset((char*)(&head) + 0xA, 0, 0x6);
}
iNESCart.totalFileSize =filesize;
iNES_read_header_info();
if (!ROM_size)
@@ -996,9 +1005,6 @@ int iNESLoad(const char *name, FCEUFILE *fp)
filesize -= 512;
}
iNESCart.PRGRomSize = ROM_size >=0xF00? (pow(2, head.ROM_size >>2)*((head.ROM_size &3)*2+1)): (ROM_size*0x4000);
iNESCart.CHRRomSize =VROM_size >=0xF00? (pow(2, head.VROM_size>>2)*((head.VROM_size&3)*2+1)): (VROM_size*0x2000);;
romSize = iNESCart.PRGRomSize + iNESCart.CHRRomSize;
if (romSize > filesize)
@@ -1030,6 +1036,18 @@ int iNESLoad(const char *name, FCEUFILE *fp)
memset(VROM, 0xFF, vrom_size_pow2);
FCEU_fread(VROM, 1, iNESCart.CHRRomSize, fp);
}
if (iNESCart.miscROMSize) {
MiscROM =(uint8*) FCEU_malloc(iNESCart.miscROMSize);
if (!MiscROM) {
free(VROM);
free(ROM);
VROM =NULL;
ROM =NULL;
return 0;
}
FCEU_fread(MiscROM, 1, iNESCart.miscROMSize, fp);
}
iNESCart.PRGCRC32 = CalcCRC32(0, ROM, iNESCart.PRGRomSize);
iNESCart.CHRCRC32 = CalcCRC32(0, VROM, iNESCart.CHRRomSize);