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Revision as of 03:25, 24 February 2023 by Anonymous (Privacy policy) (subchannel updates)
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This is an encryted container format, first step to work with it is to decrypt it
After decryption we shoould refer to it as ISO.BIN.DAT (without the "E"... so the EDAT became a DAT)

ISO.BIN.DAT (decrypted)

This can be considered an intermediate container composed by the ISO.BIN + a 40 bytes signature at bottom
For the purpose of this wiki page and the concept of extracting data from layers like an onion we need to delete the last 40 bytes to convert a ISO.BIN.DAT into a ISO.BIN
The signature is intended as a sanity check to the ISO.BIN data. In other words if you are going to modify the ISO.BIN you will need to generate a new signature for it when rebuilding it
Example source-code to generate the 40 byte signature can be found in which is part of pop-fe.

ISO.BIN structure

All offsets are in little endian (except in the last table where there are two counters in decimal)

1 block = 1024 bytes (0x400)
1 cluster = 16 blocks = 1024*16 bytes =16384 bytes (0x4000)
disc_starts ----------> 0x000400 (disc1), 0x100400 (disc2), 0x200400 (disc3), 0x300400 (disc4), etc...
disc_tocs -----------> 0x000C00 (disc1), 0x100C00 (disc2), 0x200C00 (disc3), 0x300C00 (disc4), etc...
disc_map_tables ----> 0x004400 (disc1), 0x104400 (disc2), 0x204400 (disc3), 0x304400 (disc4), etc...

Header (optional)

1 block = 1024 bytes (0x400)

Always exists in PS1 classic multidiscs (the example below is from ff8), in the official PS1 classics single disc doesnt exists, but the custom PS1 classics single discs can use it (there are custom tools that adds it in all cases)

Block Nº Offset Length Name Example Description
0x0000 0x10 (16 bytes) magic PSTITLEIMG000000
0x0010 0x1F0 (496 bytes) padding
0x0200 0x64 (100 bytes) discs_start_offsets 00 04 00 00 25 chunks of 4 bytes ... each chunk = start position of each disc, in games with only 1 disc only the first 4 bytes are used
0x0264 0x10 (16 bytes) game_id _SLES_12345 common identifyer for all discs
0x0274 0x18C (396 bytes) padding


64 clusters, 1024 blocks, 10485576 bytes (0x100000)

This structure is repeated one time for every disc of the game all them joined together consecutivelys (the example below is from ff8), the whole space is reserved even when there is no data used

Cluster Nº Block Nº Offset Length Name Example Notes
Disc map header
1 0x0000 0x00C (12 bytes) magic PSISOIMG0000 In "PSP Minis" It's NPUMDIMG (NP UMD Image) ..... probably another for "ps2 classics" (speculation)
0x000C 0x004 (4 bytes) section size Offset from the start of the PSISOIMG section to the next section
For uncompressed images this is usually 0x100000 + size of iso-image padded to 0x9300
If the disc contains CD-DA tracks then this number will also include all the ATRACK encoded audio that follows after the disk image.
0x0010 0x3F0 (1008 bytes) padding
2 0x0400 0x010 (16 bytes) disc id _SLES_12345 in games with several discs each disc has a different id
0x0410 0x3F0 (1008 bytes) padding
3 0x0800 0x3FС (1020 bytes) Disc toc table variable Table of content, like CUE sheet, supports upto 99 entries (102 entries total)
0x0BFC 0x004 (4 bytes) disc start offset 0x100000
4 0x0C00 0x400 (1024 bytes) Audio tracks table Datas of audio tracks (2-65). offset, size, and more
5 0x1000 0x220 (544 bytes) Audio tracks table Datas of audio tracks (66-99). offset, size, and more
0x1220 0x0B4 (180 bytes) Game params table
0x12D4 0x004 (4 bytes) subchannel offset 0x100400 Offset to where subchannel data is stored. This is used with libcrypt.
0x12D8 0x004 (4 bytes) subchannel count 0x178 Number of subchannel blocks. Each block is 12 bytes.
0x12DC 0x124 (292 bytes) padding
6 0x1400 0x400 (1024 bytes) not used
7 0x1800 0x400 (1024 bytes) not used
8 0x1C00 0x400 (1024 bytes) not used
9 0x2000 0x400 (1024 bytes) not used
10 0x2400 0x400 (1024 bytes) not used
11 0x2800 0x400 (1024 bytes) not used
12 0x2C00 0x400 (1024 bytes) not used
13 0x3000 0x400 (1024 bytes) not used
14 0x3400 0x400 (1024 bytes) not used
15 0x3800 0x400 (1024 bytes) not used
16 0x3C00 0x010 (16 bytes) checksum 0x1CCE0033... It seems to be the checksum of this block, and because this block is always unused the checksum is always 1CCE003360C6E8A6B36A972D00EAFDBF
0x3C10 0x3F0 (1008 bytes) padding
Disc map table
17 0x4000 variable Disc map table Divided in chunks of 32 bytes
Up to 32
Up to 64
Disc map table

Disc toc table

Entry structure:

Entry Nº Offset Length Name Example Notes
1 0x00 0x01 (1 byte) TYPE 0x41/0x01 entry flags
0x01 0x01 (1 byte) TNO 00 always zero
0x02 0x01 (1 byte) POINT 0xA0/0xA1/0xA2/0x01/0x02/0x03/etc increases
0x03 0x01 (1 byte) MIN varies decimal
0x04 0x01 (1 byte) SEC varies decimal
0x05 0x01 (1 byte) FRAME varies decimal
0x06 0x01 (1 byte) ZERO 00 always zero
0x07 0x01 (1 byte) PMIN varies decimal
0x08 0x01 (1 byte) PSEC varies decimal
0x09 0x01 (1 byte) PFRAME varies decimal
Up to 102 same structure than the previous entry

Audio tracks table

Entry structure:

Entry Nº Offset Length Name Example Notes
1 0x00 0x04 (4 bytes) offset
0x04 0x04 (4 bytes) size
0x08 0x04 (4 bytes) unknown_0 always zeroed
0x0C 0x04 (4 bytes) enc_key encryption key (or 0 if not encrypted)
Up to 98 same structure than the previous entry

The audio tracks themselves are raw ATRAC3 streams without a header. One way to create such blobs is to use the atracdenc encoder and strip of the first 0x60 bytes which is the header. The resulting blob is what the Audio tracks table entries will point to.

Game params table

There is a setting related with PS1 libcrypt protection in this area (located at relative absolute offset 0x12B0 into the PSISOIMG0000 section, length 0x4 little endian), see: talk.

Libcrypt in emulator is supported by supplying ready 16 bit key in little endian format (0xA371 in CTR example). List of keys can be obtained using Libcrypt Magic Word Finder PSX List of keys can also be found in pop-fe/

Disc map table

The table has an area reserved of 1032192 bytes. Divided in 32256 entries, of 32 bytes each entry. The number of used entryes in the file_table can vary (seems to be dependant of the .iso contents). The number of entries availables to store data is affected by a checksum (16 bytes) that is present only in the the last block of each cluster (in block nº16 of every cluster) When this checksum is between used entryes... his length is 32 bytes (it "steals" the area of one entry) Seems to be a checksum of this block... when the block is filled with zeroes the checksum is : 1CCE0033 60C6E8A6 B36A972D 00EAFDBF

The first 4 bytes of each entry (file offset from start of .iso root) increases for each entry in a amount of bytes determined by the previous entryes.... in other words... the second file in the .iso is displaced the number of bytes used by the first file... and the third file is displaced in a amount of bytes used by the addition of the sizes of first and second file

Entry Nº Offset Length Name Example Notes
1 0x00 0x04 (4 bytes) file_offset 0 file offset from start of .iso root (for the first entry is always 0)
0x04 0x02 (2 bytes) file_size variable this size determines the displacement of the next file (in the next entry)
0x06 0x02 (2 bytes) file_type ? 01 00 usually 1... and 0 for the last entry
0x08 0x10 (16 bytes) file_checksum variable First 16 bytes of the sha1 of the uncompressed data
0x18 0x08 (8 bytes) padding
Up to 32256 same structure than the previous entry

Common Disc table

Composed by a variable number of entries (depends of the number of files/folders inside the discs), 12 bytes each entry

Entry Nº Offset Length Name Example Notes
1 0x00 0x04 (4 bytes) file_offset ? 0 always increases
0x04 0x02 (2 bytes) file_type ? 01 01 always 01 01
0x06 0x03 (3 bytes) counter 1 some kind of counter, in decimal, always increases <-------- related with "sectors" inside the .iso ?
0x09 0x03 (3 bytes) counter 2 another counter, in decimal, always increases, its in relationship with the previous counter (this one is always 200 bytes bigger than the previous one)
Up to ? same structure than the previous entry

Subchannel data

This is data stored in separate .pgd in psar (0xED4 [0x12D4] in ISO header point to it if available), should be required only for games that use libcrypt protection (LC2 and higher). Header of decrypted file is FFFFFFFF 00000000 FFFFFFFF, end of file is marked by FFFFFFFF FFFFFFFF FFFFFFFF. Values are always 150 sectors lower than real disc sector (pregap?). Values are in little endian (sector only actually, others are 1 byte values). See section below for example code on how to generate this table.

Entry Nº Name Offset Size (bytes) Example Notes
1 or 2? Sector 0x00 4 Sector number - 150
Track Number 0x04 1 0x01 Always 0x01
Index 0x05 1 0x01 Always 0x01
Pmin(relative) 0x06 1
Psec(relative) 0x07 1
Pframe(relative) 0x08 1
Amin (Absolute) 0x09 1
Asec (Absolute) 0x0A 1
Aframe (Absolute) 0x0B 1
Up to 1024 or up to 1022? (minus header/footer) same structure than the previous entry

Minis ISO.BIN structure


Name Offset Size Example Remark
Magic! 0x0 0x8 NPUMDIMG
unk1 0x8 0x4 N.A (be)
Block Size 0xC 0x4 N.A (be)
ContentID 0x10 0x24 UP4123-NPUZ00119_00-ANGRYBIRDSGAME01
Padding1 0x34 0xC ({0x0}filled)
Common1 0x40 0x4 0x00 0x08 0x00 0xE0
Padding2 0x44 0x4 ({0x0}filled)
unk2 0x48 0x4 N.A (be)
Padding3 0x4c 0x8 ({0x0}filled)
LBA Start 0x54 0x4 N.A (be)
Padding4 0x58 0x4 ({0x0}filled)
unk3 0x5C 0x4 N.A (be)
Padding5 0x60 0x4 ({0x0}filled)
LBA End 0x64 0x4 N.A (be)
unk4 0x68 0x4 N.A (be)
Np_Table Offset 0x6C 0x4 N.A (be)
GameID 0x70 0xA NPUZ-00119
Common2 0x7A 0x26 N.A
Header Key 0xA0 0x10 N.A.
Padding6 0xB0 0x50 N.A({0x0} filled)

Iso Block Table (1st decrypted but compressed block)

Name Offset Size Example Remark
Block MAC 0x100 0x10 N.A
Block Offset 0x110 0x4 N.A (be)
Block Size 0x114 0x4 N.A (be)
Padding 0x118 0x8 00000000

Until X blocks where X is the block number

Minis MINIS.BIN structure


Name Offset Size Example Remark
Magic! 0x0 0x8 NPUMDIMG
unk1(be) 0x8 0x4 N.A
Block Size(be) 0xC 0x4 N.A
ContentID 0x10 0x24 UP4123-NPUZ00119_00-ANGRYBIRDSGAME01
Padding 0x34 0x8 ({0x0} filled)
Encrypted Version Key 0x40 0x10 N.A AES-CBC Encrypted


  • You can decrypt any eboot.pbp from a mini OR pspremaster OR psn paid eboot(?) with npdpc
  • You can use any header on an iso.bin, and the ps3 won't even try to check it
  • (be) means that the generated table values will have to be endian swapped when using npdpc (now possible thanks to arnold)
  • [arnold's code]
  • [kirk lib]

Decrypting owned ISO.BIN.EDATs and MINIS.EDATs

These source codes won't work without further modification!

These examples work with every EDAT type.

Decrypting with SCE SDK

#define PSP_EMULATOR_KLIC {{0x2A, 0x6A, 0xFB, 0xCF, 0x43, 0xD1, 0x57, 0x9F, 0x7D, 0x73, 0x87, 0x41, 0xA1, 0x3B, 0xD4, 0x2E}}
#define BUF_SIZE      (16*1024)
#define NP_POOL_SIZE  (128*1024)

#include <np.h>
#include <np/drm.h>
#include <stdio.h>
#include <cell/cell_fs.h>
#include <cell/sysmodule.h>

int main ()
uint8_t np_pool[NP_POOL_SIZE];
uint8_t read_buf[BUF_SIZE];
int ret;
int fd1,fd2;
uint64_t file_size;
uint64_t sw;
char *edata_file,*raw_file; //raw_file will be created if it does not exist
SceNpDrmKey k_licensee = PSP_EMULATOR_KLIC;

ret = cellSysmoduleLoadModule(CELL_SYSMODULE_FS);
ret = cellSysmoduleLoadModule(CELL_SYSMODULE_SYSUTIL_NP);
ret = sceNpInit(NP_POOL_SIZE, np_pool);

printf(" Open '%s' as NPDRM file\n", edata_file);
ret = sceNpDrmIsAvailable2(&k_licensee, edata_file);
if (ret != CELL_OK) {
	printf("EDAT not activated\n");
	return ret;
SceNpDrmOpenArg arg;
	arg.flag = SCE_NP_DRM_OPEN_FLAG;
	ret = cellFsOpen(edata_file, CELL_FS_O_RDONLY, &fd1, &arg, sizeof(arg));
	if (ret != CELL_FS_OK) {
		printf("Error opening for reading\n");
		return ret;
printf("Opening file to dump to '%s'\n", raw_file);
	ret = cellFsOpen(raw_file, CELL_FS_O_RDWR|CELL_FS_O_CREAT, &fd2, NULL, 0);
	if (ret != CELL_FS_OK) {
		printf("Error opening file\n");
		return ret;
printf("\n[ dump edata ]\n");
	for (uint64_t r = 0; r < file_size; r += BUF_SIZE) {
		uint64_t rsize;
		uint64_t remain = file_size - r;
		if (remain > BUF_SIZE) { remain = BUF_SIZE; }

		ret = cellFsRead(fd1, read_buf, remain, &rsize);
		if (ret != CELL_OK || rsize != remain) {
			printf("Read error ('%s'): ret = 0x%08x, size = %llx, %llx\n",
					edata_file, ret, remain, rsize);
			if (ret == CELL_OK) { ret = -1; }
			return ret;

		printf("dump data: (0x%08llx - 0x%08llx)  ", r, r + remain);
		ret = cellFsWrite(fd2, (const void *)read_buf, (size_t)remain, &sw);
		if (ret != CELL_FS_OK) {
			return -1;

	/* file close */
ret = cellFsClose(fd1);
ret = cellFsClose(fd2);
ret = sceNpTerm();
ret = cellSysmoduleUnloadModule(CELL_SYSMODULE_SYSUTIL_NP);
ret = cellSysmoduleUnloadModule(CELL_SYSMODULE_FS);
return ret;

Decrypting with PSL1GHT

Generate the subchannel blob

Python code to generate the subchannel blob:

def generate_subchannels(magic_word):
    def generate_subchannel(sector, is_corrupt):
        def bcd(i):
            return int(i % 10) + 16 * (int(i / 10) % 10)

        sc = bytearray(12)
        s = sector - 150
        struct.pack_into('<I', sc, 0, s)
        struct.pack_into('<B', sc, 4, 1)
        struct.pack_into('<B', sc, 5, 1)
        if is_corrupt:
            s = s - 1
        struct.pack_into('<B', sc, 8, bcd(s % 75))
        s = s - (s % 75)
        s = int(s / 75)
        struct.pack_into('<B', sc, 7, bcd(s % 60))
        struct.pack_into('<B', sc, 6, bcd(int(s / 60)))

        s = sector
        if is_corrupt:
            s = s - 1
        struct.pack_into('<B', sc, 11, bcd(s % 75))
        s = s - (s % 75)
        s = int(s / 75)
        struct.pack_into('<B', sc, 10, bcd(s % 60))
        struct.pack_into('<B', sc, 9, bcd(int(s / 60)))

        return sc

    sector_pairs = {
        15: [14105,14110],
        14: [14231,14236],
        13: [14485,14490],
        12: [14579,14584],
        11: [14649,14654],
        10: [14899,14904],
         9: [15056,15061],
         8: [15130,15135],
         7: [15242,15247],
         6: [15312,15317],
         5: [15378,15383],
         4: [15628,15633],
         3: [15919,15924],
         2: [16031,16036],
         1: [16101,16106],
         0: [16167,16172]
    scd = bytes(0)
    scd = scd + bytes([0xff,0xff,0xff,0xff,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff])
    for i in range(15, -1, -1):
        scd = scd + generate_subchannel(sector_pairs[i][0], magic_word & (1<<i))
        scd = scd + generate_subchannel(sector_pairs[i][1], magic_word & (1<<i))
    scd = scd + bytes([0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff])

    print('Generate subchannel data for 0x%04x' % magic_word)
    s = scd
    while s:
        print(struct.unpack_from('<I', s, 0)[0], s[:12].hex())
        s = s[12:]

    return scd

About PS2 Classics

There are some new formats present in PS2 Classics. The first one is ISO.BIN.ENC, the second one is .dxt, which is inside CONTENT folder and there's also a single file named CONFIG. You can see more about this when you first install a PS2 Classic. There's also a problem with the Data while trying to execute the instalable file. The message Unsupported Data appears on the screen when highliting the file and the error 80028F14 is shown while trying to start.
This was made with the Max Payne game. There could probably be other formats present aswell


For PSN PS2-Classics Games ISO.BIN.EDAT only contains the Title Id of the disc. Example: