Editing PS2 Savedata

=Common terms used in this page=
{{Savedata common terms}}

=Game Saves PS2=
[[Image:Memory_Card_Utility_(PS_PS2).jpg|right| ]]

{| class="wikitable"
|-
! Storage Media !! Path !! Import/Export file conversions
|-
| Internal HDD || dev_hdd0/savedata/vmc/'''<virtual_memcard>'''.VM2 ||
|-
| External USB || dev_usb0/PS3/EXPORT/PSV/'''<Save_ID>'''.PSV || When exporting to USB the "block" is extracted from VM2 an saved separatedly as a PSV
|-
| rowspan="4" | Internal HDD <br /> Only "PS2 Classics" || dev_hdd0/home/'''<userid>'''/ps2emu2_savedata/'''<TITLE_ID>'''/ICON0.PNG || Direct copy from the game install folder, no conversion
|-
| dev_hdd0/home/'''<userid>'''/ps2emu2_savedata/'''<TITLE_ID>'''PARAM.SFO ||
|-
| dev_hdd0/home/'''<userid>'''/ps2emu2_savedata/'''<TITLE_ID>'''/SCEVMC0.VME ||
|-
| dev_hdd0/home/'''<userid>'''/ps2emu2_savedata/'''<TITLE_ID>'''/SCEVMC1.VME ||
|-
| rowspan="4" | External USB <br /> Only "PS2 Classics" || dev_usb0/PS3/EXPORT/PS2SD/'''<TITLE_ID>'''/ICON0.PNG || Direct copy from the game install folder, no conversion
|-
| dev_usb0/PS3/EXPORT/PS2SD/'''<TITLE_ID>'''PARAM.SFO || Added a signature at the end of the file (out of the SFO structure)
|-
| dev_usb0/PS3/EXPORT/PS2SD/'''<TITLE_ID>'''/SCEVMC0.VME ||
|-
| dev_usb0/PS3/EXPORT/PS2SD/'''<TITLE_ID>'''/SCEVMC1.VME ||
|-
| External MC || mc_root/ || Raw copy from/to a real PS2 Memory Card using a [[PlayStation_Card_Adapter| Memory Card Adapter]]
|}

*'''ICON0.PNG''' in the table represents all the multimedia files supported by the XMB for this format like images, audio, etc... same format than PS3. See: [[Content_Information_Files#Saved_Data_Utility_.28PS3.29|Content Information Files - Saved Data Utility (PS3)]]

==Memory Card Formats PS2==

===Memory card PS2 (original)===
The PS2 memory card file system has a fairly simple design, with some allowances made for the limitations of flash memory. It's overall structure is similar to the well known MS-DOS FAT file system. It uses a file allocation table (FAT) to keep track of allocated space and a hierarchical directory system where all of a file's metadata is stored in it's directory entry. Like the FAT file system, which groups disk sectors into clusters, the PS2 memory card file system groups flash memory pages in to clusters. On standard PS2 memory cards, the cluster size 1024 bytes, or 2 pages long.

*The Superblock
The key to the PS2 memory card file system is the superblock. Located in the first page of the memory, this is the only part of the file system with a fixed location. While some things like the do end up in fixed locations on standard 8M memory cards, you shouldn't rely on this. 

{| class="wikitable" style="font-size:small;"
|-
! Block Nº !! Cluster Nº !! Page Nº !! Offset !! Length !! Name !! Example !! Description
|-
| rowspan="21" style="background-color:#DDDDDD;" | 0 <br /> '''superblock''' || rowspan="20" style="background-color:#DDDDDD;" | 0 || rowspan="19" style="background-color:#DDDDDD;" | 0 || 0x000000 || 0x01C (28 bytes) || '''magic''' || Sony PS2 Memory Card Format || Memory Card identifyer
|-
| 0x00001C || 0x00C (12 bytes) || '''version''' || 1.2.0.0 || Memory Card format version. '''(1.2.0.0 = full support for bad_block_table map)'''
|-
| 0x000028 || 0x002 (2 bytes) || '''page_len''' || 512 || Page size in bytes (without ECC)
|-
| 0x00002A || 0x002 (2 bytes) || '''pages_per_cluster''' || 2 || Number of pages in a cluster
|-
| 0x00002C || 0x002 (2 bytes) || '''pages_per_block''' || 16 || Number of pages in an block
|-
| 0x00002E || 0x002 (2 bytes) || ''not used'' || FF00 ||
|-
| 0x000030 || 0x004 (4 bytes) || '''clusters_total''' || 8192 || Total number of clusters
|-
| 0x000034 || 0x004 (4 bytes) || '''alloc_start''' || 41 || First allocatable cluster number. Cluster values in the FAT and directory entries are relative to this
|-
| 0x000038 || 0x004 (4 bytes) || '''alloc_end''' || 8135 || Cluster offset number after the highest allocatable cluster. Relative to '''alloc_start'''. Not used.
|-
| 0x00003C || 0x004 (4 bytes) || '''cluster_rootdir''' || 0 || Cluster offset of the first cluster of the root directory. Relative to '''alloc_start'''. Must be zero.
|-
| 0x000040 || 0x004 (4 bytes) || '''bblock1''' || 1023 || Backup1 block number
|-
| 0x000044 || 0x004 (4 bytes) || '''bblock2''' || 1022 || Backup2 block number
|-
| 0x000050 || 0x080 (128 bytes) || '''ind_fat_table''' || 8 || '''Indirect FAT Table''' cluster number
|-
| 0x0000D0 || 0x080 (128 bytes) || '''bad_block_table''' || -1 || Bad blocks table (damaged blocks index)
|-
| 0x000150 || 0x001 (1 byte) || '''card_type''' || 2 || Memory card type '''(2 = PS2 memory card)'''
|-
| 000x0151 || 0x001 (1 byte) || '''card_flags''' || 0x52 || Memory Card features '''(0x01 = ECC support, 0x08 = Bad Block support, 0x10 = Erased state zeroed)'''
|-
| 0x000152 || 0x002 (2 byte) || ''not used'' || FF ||
|-
| 0x000154 || 0x0BC (188 bytes) || ''unknown'' || ||
|-
| 0x000200 || 0x010 (16 bytes) || '''ECC''' || || Error Correction Code. The last 16 bytes of all the pages are reserved for this code. See explain below
|-
| style="background-color:#DDDDDD;" | 1 || || || ''not used'' || ||
|-
| style="background-color:#DDDDDD;" | Up to 7 || style="background-color:#DDDDDD;" | Up to 15 || || || ''not used'' || ||
|-
| rowspan="5" style="background-color:#DDDDDD;" | 1 || rowspan="2" style="background-color:#DDDDDD;" | 8 <br /> '''ind_fat_table''' || style="background-color:#DDDDDD;" | 16 || 0x002100 || 0x210 (528 bytes) || '''Indirect FAT Table''' || || rowspan="18" style="background-color:#DDDDDD;" | '''FAT File System'''
|-
| style="background-color:#DDDDDD;" | 17 || || || ||
|-
| rowspan="2" style="background-color:#DDDDDD;" | 9 || style="background-color:#DDDDDD;" | 18 || 0x002520 || 0x210 (528 bytes) || '''FAT Table''' ||
|-
| style="background-color:#DDDDDD;" | 19 || || || ||
|-
| style="background-color:#DDDDDD;" | Up to 15 || style="background-color:#DDDDDD;" | Up to 31 || || || ||
|-
| style="background-color:#DDDDDD;" | Up to 4 || || || || || ||
|-
| rowspan="5" style="background-color:#DDDDDD;" | 5 || rowspan="2" style="background-color:#DDDDDD;" | 40 || style="background-color:#DDDDDD;" | 80 || || || ||
|-
| style="background-color:#DDDDDD;" | 81 || || || ||
|-
| rowspan="2" style="background-color:#DDDDDD;" | 41 <br /> '''alloc_start''' <br /> '''cluster_rootdir''' || style="background-color:#DDDDDD;" | 82 || 0x00A920 || 0x210 (528 bytes) || '''Allocatable Clusters''' ||
|-
| style="background-color:#DDDDDD;" | 83 || || || ||
|-
| style="background-color:#DDDDDD;" | Up to 47 || style="background-color:#DDDDDD;" | Up to 95 || || || ||
|-
| style="background-color:#DDDDDD;" | Up to 1004 || || || || || ||
|-
| rowspan="5" style="background-color:#DDDDDD;" | 1005 || rowspan="2" style="background-color:#DDDDDD;" | 8040 || style="background-color:#DDDDDD;" | 16080 || || || ||
|-
| style="background-color:#DDDDDD;" | 16081 || || || ||
|-
| rowspan="2" style="background-color:#DDDDDD;" | 8041 || style="background-color:#DDDDDD;" | 16082 || 0x819120 || 0x210 (528 bytes) || '''Reserved Clusters''' ||
|-
| style="background-color:#DDDDDD;" | 16083 || || || ||
|-
| style="background-color:#DDDDDD;" | Up to 8047 || style="background-color:#DDDDDD;" | Up to 16095 || || || ||
|-
| style="background-color:#DDDDDD;" | Up to 1021 || || || || || ||
|-
| rowspan="3" style="background-color:#DDDDDD;" | 1022 <br /> '''bblock2''' || rowspan="2" style="background-color:#DDDDDD;" | 8176 <br /> '''alloc_end''' || style="background-color:#DDDDDD;" | 16352 || 0x83BE00 || 0x210 (528 bytes) || '''Temporal Data''' || || rowspan="3" style="background-color:#DDDDDD;" | '''Backup Block 2''' <br />  Used to store the number of the block that is going to be programmed
|-
| style="background-color:#DDDDDD;" | 16353 || || || ||
|-
| style="background-color:#DDDDDD;" | Up to 8183 || style="background-color:#DDDDDD;" | Up to 16367 || || || ||
|-
| rowspan="3" style="background-color:#DDDDDD;" | 1023 <br /> '''bblock1''' || rowspan="2" style="background-color:#DDDDDD;" | 8184 || style="background-color:#DDDDDD;" | 16368 || 0x83DF00 || 0x210 (528 bytes) || '''Temporal Data''' || || rowspan="3" style="background-color:#DDDDDD;" | '''Backup Block 1''' <br /> Used to store a copy of the data that is going to be programmed to a block
|-
| style="background-color:#DDDDDD;" | 16369 || || || ||
|-
| style="background-color:#DDDDDD;" | Up to 8191 <br /> '''clusters_total''' || style="background-color:#DDDDDD;" | Up to 16383 || || || ||
|}

A standard Ps2 Memory Card is composed by 1024 blocks, each block contains 16 pages of 528 bytes, for a total of 528*16*1024=8.650.752 bytes (0x840000)

Total ECC data is 16*16*1024=262.144 bytes

This gives an available space to store data of: Total-ECC = 8650752-262144 = 8388608 bytes = 8mb

*Backup Blocks
Two complete blocks are reserved to deal with the possibility of the memory card being removed by the user when data is being saved. Writing data to card requires erasing and reprogramming an entire block

Before writing a block, both '''bblock1''' and '''bblock2''' are erased. Then a copy of the new data that is going to be written is stored in '''bblock1''', and the number of the block that is going to be written is stored in '''bblock2'''. The block being programmed is then erased and writed. Finally, '''bblock2 is erased'''

Recovery caused by removal of the memory card is implemented whenever a memory card is inserted into the PS2 by checking '''bblock2''', if it's not erased, then programming is assumed to have not been completed. The contents of '''bblock1''' are then copied to the block given in '''bblock2'''. Then '''bblock2''' is erased

*Error Correction Code (ECC)
The data area of each page (512 bytes) is divided into 128 byte long chunks and for each chunk a simple [[http://en.wikipedia.org/wiki/Hamming_code 20-bit Hamming code]] is calculated and stored in three bytes

The first byte contains the column (or bit-wise) parity bits, with the even groups in the lower nibble and the odd groups in the upper nibble. The second and third bytes contain the even and odd groups respectively for the line (or byte-wise) parity bits

The 3 ECC bytes for each of the 4 chunks are stored in order in the page's spare area for a total of 12 bytes


Source: [[http://www.csclub.uwaterloo.ca:11068/mymc/ps2mcfs.html PlayStation 2 Memory Card File System - By Ross Ridge]]

===Virtual Memory Card PS2 (.VM2)===
File structure is the same than a "original PS2 memory card", there are not apparent differences

*Speculation
Last place to store a PS3 identifyer is inside the FAT filesystem ?... maybe there is none

===PS2 Single Save ? (.PSV)===

===Virtual Memory Card Encrypted (.VME)===

When exporting Game Saves for "PS2 classics" (CATEGORY 2P) to a external USB drive there is a "rare" PARAM.SFO exported. This PARAM.SFO seems to be a copy of the main PARAM.SFO from the installed game folder with an added "signature" "injected" at the end of the file (out of his structure) with a lenght of 20 bytes. Is supposed to be a security feature when exporting the gamesave, is not confirmed if this PARAM.SFO (with the injected "signature" out of his structure) exists in the internal HDD (when importing, or present at some time with the "PS2 virtual memory cards").

 Wrote by ps3hen in ps3hax forums weeks ago
 
 PSN PS2 games do not save to VM cards in the same way to original PS2 games and PS1 games do
 Each user who plays a PSN PS2 Game and makes a save, generates two VM cards (one for each slot) especially for that user account, for that game.
 Each time the game is loaded the user selected VM cards(chosen from the VMC ulitity) are um-mounted and the user's save file for that game mounts the dedicated PS2 VM cards to the PS3 Virtual MC slots.
 When the game is quit, the dedicated VM cards are un-mounted. But for some reason the user selected VM cards are not re-mounted, this is when I knew they mounted dedicated VM cards for each save.
 
 The save file structure goes like this:
 /PS3/EXPORT/PS2SD/XXXX11111/ICON0.PNG
                                             PARAM.SFO
                                             SCEVMC0.VME
                                             SCEVMC1.VME
 
 Side note: "XXXX11111" will be different to the Title ID inside the Param.sfo. Inside the Param.sfo is the original title ID of the game when it was a PS2 Disc Game.

==Memory Card Tools PS2==
[[http://www.csclub.uwaterloo.ca:11068/mymc/ mymc]]
 mymc is a public domain command line utility for working with PlayStation 2 memory card images (.ps2) as used by the PlayStation 2 emulator PCSX2.
 It allows save files in the MAX Drive (.max), EMS (.psu), SharkPort (.sps), X-Port (.xps) and Code Breaker (.cbs) formats to be imported directly into these images.
 It can also export save files in eiter the MAX Drive and EMS formats. See the README.txt file included in the distribution below for more details. 

===Extracting and Injecting single PS2 Game Saves in PC===
The method is the same one used in PS1, see: [[Game_Saves#Extracting_and_Injecting_single_PS1_Game_Saves_in_PC | Extracting and Injecting single PS1 Game Saves in PC ]], but here the file format is: '''.VM2''' (a virtual PS2 memory card in PS3 format), and '''.PS2''' (a 1:1 raw copy of a PS2 memory card). Both are the same

The PC program to manage this '''.PS2''' memory cards is "mymc" and also can be generated by the emulator "PCSX2". See: http://wiki.pcsx2.net/index.php?title=Memcard

*External forums manuals:
http://psx-scene.com/forums/f177/tutorial-ps2-psu-saves-ps3-internal-memory-card-without-memory-card-adaptor-103436/

===Editing PS2 Game Saves icons in PC===
In PS2 save Games the icon is a file with the extension '''.icn''' (any name is valid), is "linked" to the save game by the file '''icon.sys'''. The PC program "PS2 SaveBuilder v0.8" can generate this 2 files (included a black default icon)... the icon can be replaced later.

The format supports 3D objects (e.g: save games of tomb raider with a figurine of lara croft)

The program "bmp2icon.exe by sjeep" can generate a '''.icn''' in the correct format for importing to "PS2 SaveBuilder v0.8", additionally it can add a 3d object where your image is applyed as a texture over the faces of a basic 3D object, the options are: 3D rectangle, 3D cube, of flat square

The source image to importing in "bmp2icon.exe by sjeep" must be a 24-bit 128x128 pixel .BMP

{{File Formats}}<noinclude>[[Category:Main]]</noinclude>