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specify actual GCI header fields

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This commit is contained in:
Martin Michelsen
2023-04-02 15:04:35 -07:00
parent e98d01d7e9
commit c4e3eb238f
1 changed files with 21 additions and 9 deletions
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src/SaveFileFormats.hh
+21 -9
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@@ -27,18 +27,30 @@ struct ShuffleTables {
// Every PSOGC save file begins with a PSOGCIFileHeader. The first 0x40 bytes of
// this are the .gci file header; the remaining bytes of the file are the actual
// data from the memory card. For save files (system / character / Guild Card),
// one of the structures below immediately follows the PSOGCIFileHeader. The
// system file is not encrypted, but the character and Guild Card files are
// encrypted using a seed stored in the system file.
struct PSOGCIFileHeader {
// Every PSOGC save file begins with a PSOGCIFileHeader. The first 0x40 bytes
// of this structure are the .gci file header; the remaining bytes after that
// are the actual data from the memory card. For save files (system /
// character / Guild Card), one of the structures below immediately follows
// the PSOGCIFileHeader. The system file is not encrypted, but the character
// and Guild Card files are encrypted using a seed stored in the system file.
/* 0000 */ parray<char, 4> game_id; // 'GPOE', 'GPSP', etc.
/* 0004 */ parray<char, 2> developer_id; // '8P' for Sega
// There is a structure for this part of the header, but we don't use it
/* 0006 */ parray<uint8_t, 0x3A> remaining_gci_header;
// There is a structure for this part of the header, but we don't use it.
/* 0006 */ uint8_t unused;
/* 0007 */ uint8_t image_flags;
/* 0008 */ ptext<char, 0x20> internal_file_name;
/* 0028 */ be_uint32_t modification_time;
/* 002C */ be_uint32_t image_data_offset;
/* 0030 */ be_uint16_t icon_formats;
/* 0032 */ be_uint16_t icon_animation_speeds;
/* 0034 */ uint8_t permission_flags;
/* 0035 */ uint8_t copy_count;
/* 0036 */ be_uint16_t first_block_index;
/* 0038 */ be_uint16_t num_blocks;
/* 003A */ parray<uint8_t, 2> unused2;
/* 003C */ be_uint32_t comment_offset;
// GCI header ends here (and memcard file data begins here)
// game_name is e.g. "PSO EPISODE I & II" or "PSO EPISODE III"
/* 0040 */ ptext<char, 0x1C> game_name;
/* 005C */ be_uint32_t embedded_seed; // Used in some of Ralf's quest packs