SabreTools/SabreTools.Serialization
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Fix reading PRG and CHR

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This commit is contained in:
Matt Nadareski
2026-03-06 13:23:17 -05:00
parent 5c973bac96
commit 7dfb015dd5
1 changed files with 14 additions and 6 deletions
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20
SabreTools.Serialization/Readers/NESCart.cs
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@@ -42,16 +42,24 @@ namespace SabreTools.Serialization.Readers
#endif
cart.Trainer = data.ReadBytes(512);
// Read the PRG-ROM data
// Derive the PRG-ROM and CHR-ROM data sizes
// TODO: Make model for PRG-ROM data blocks
// TODO: Use combined size from 2.0
int prgRomSize = cart.Header.PRGROMSize * 16384;
int chrRomSize = cart.Header.CHRROMSize * 8192;
if (cart.Header is Header2 header2)
{
byte msb = (byte)(header2.PRGCHRMSB & 0x0F);
ushort extendedSize = (ushort)((msb << 8) | header.PRGROMSize);
prgRomSize = extendedSize * 16384;
msb = (byte)(header2.PRGCHRMSB >> 4);
extendedSize = (ushort)((msb << 8) | header.CHRROMSize);
chrRomSize = extendedSize * 8192;
}
// Read the PRG-ROM and CHR-ROM data
if (prgRomSize > 0)
cart.PRGROMData = data.ReadBytes(prgRomSize);
// Read the CHR-ROM data, if necessary
// TODO: Use combined size from 2.0
int chrRomSize = cart.Header.CHRROMSize * 8192;
if (chrRomSize > 0)
cart.CHRROMData = data.ReadBytes(chrRomSize);