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Ensure that iNES-1.0-headered ROM files still load correctly.

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This commit is contained in:
NewRisingSun
2025-04-23 19:56:36 +02:00
committed by LibretroAdmin
parent 75ae69c0bf
commit 355fb8244d
1 changed files with 5 additions and 2 deletions
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7
src/ines.c
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@@ -934,8 +934,7 @@ static void iNES_read_header_info(void) {
iNESCart.mapper = iNES_get_mapper_id();
iNESCart.iNES2 = (head.ROM_type2 & 0x0C) == 0x08;
if (iNESCart.iNES2)
{
if (iNESCart.iNES2) {
ROM_size |= ((head.upper_PRG_CHR_size >> 0) & 0xF) << 8;
VROM_size |= ((head.upper_PRG_CHR_size >> 4) & 0xF) << 8;
iNESCart.submapper = (head.ROM_type3 >> 4) & 0x0F;
@@ -949,6 +948,10 @@ static void iNES_read_header_info(void) {
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;
} else {
iNESCart.submapper = iNESCart.miscROMNumber = iNESCart.miscROMSize = 0;
iNESCart.PRGRomSize =ROM_size*0x4000;
iNESCart.CHRRomSize =VROM_size*0x2000;
}
}