Talk:PS1 Emulation

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PS1 Emulator Types and Revisions

PS1 Emulators Types and Revisions
ps1_emu.elf (decrypted)
Firmware Bytes MD5 Timestamp Rev
1.00 AV 10 296 408 981A7428C2A59219FA05861EDEEDBD4A 06/10/04/12:16 ?
1.02 10.296.408 C5FE03742A951194C336EE33783F5CD6 06/10/21/00:01 ?
1.10 10.296.408 C9C9D7D2E36F3E3579A5DF713E9ABE1E 06/11/09/06:09 ?
1.11 10.296.408 26271CCA29B77483DC3D7FDDE7B9CC3C 06/11/21/17:55 ?
1.30 10.296.496 E7932EC24E72B3005EE152B141A63690 06/12/05/05:34 ?
1.31 10.296.496 2244DE70C85093D7E37BC3D3F4278BE1 06/12/12/18:48 ?
1.32 10.296.496 601BCADBBBC0A2D0433C932A2D67C4EF 06/12/18/05:55 ?
1.50 10.303.536 F8050B006CDFCC64DF742D7BBDC03130 07/01/18/22:53 ?
? ? ? ? ?
? ? ? ? ?
? ? ? ? ?
1.90 6.974.864 478CFED0F7EE13C94F01C2A246C83D45 07/07/21/06:45 ?
? ? ? ? ?
stripped/extracted rom/bios
2.10 ? ? ? ?
? ? ? ? ?
3.66 2.824.832 95399A202003E216794511BD2D2E9DF6 11/06/16/03:52 ?
3.70 2.824.920 045D81147B9BDFB8C8A416FD5F5A0C56 11/08/05/03:42 same
~ Any
3.72 C745A30231103B83F04539021E4878FC 11/09/14/01:17
3.73 2.824.920 EB3AFF30B3206CFA6A8962AB393F773E 11/10/04/12:55 same
3.74 E2A77C3DC9FD5AD4264341196462D096 11/10/25/00:38
4.00 2.829.784 94A8E6A8063C08FAD8CA9B340CCCAE67 11/11/22/03:17 same
~ Any
4.11 02B7F6D5F517959161B2154135D4B3BC 12/02/11/07:13
4.15 ? ? ? ?
4.20 2.829.912 3778948C92F5FA12CB0AABE65BEE5465 12/06/15/02:09 same
4.21 B7B662397E3FFDD7C11F9617C1B41856 12/06/30/01:13
4.23 S 2.829.912 6E74CC51E0C6462DF1F9278ED9DB9593 12/07/31/00:22 ?
4.25 2.829.912 03EA65C3EA3F8DB04F236C49C6B6C0E1 12/09/07/07:03 same
? ? ? ? ?
? ? ? ? ?
? ? ? ? ?
4.78 2.765.488 354F1DEEDCA3C4CFA1B49B6B28B1648D 15/12/17/01:18 ?
4.80 ? ? ? ?
Abandoned (last revision)
4.81 2.765.616 2123E3D6A8E81647CB41F51AFEE6CCD6 16/10/24/19:23 ?
4.82 2.765.616 64BFA4DBD595A20E317B2189B54BF673 17/08/24/15:42 ?
? ? ? ? ?
4.88 2.765.616 0C553CE93A2A6322E16636DD76D75E32 21/04/12/11:34 ?

  ·  Decrypted (elf): changes every firmware version
  ·  Build label: yes, with timestamp, search for -sgpu-sspu-sli4
  ·  Target Firmware: yes repeated one time
  ·  Revision: unknown

ps1_netemu.elf (decrypted)
Firmware Bytes MD5 Timestamp Rev
1.00 ~ 1.60 No
1.70 ? ? ? ?
? ? ? ? ?
? ? ? ? ?
1.90 6.853.368 8A5A3676B461C97A9A467D5651D6EAAD 07/07/21/06:47 ?
? ? ? ? ?
stripped/extracted rom/bios
2.10 ? ? ? ?
? ? ? ? ?
3.66 2.971.976 9586FC8B121E59526C31405DCFFB79CA 11/06/16/03:54 ?
3.70 2.972.168 AA1DB63461EE0BE021ED45F85A6EECE0 11/08/05/03:43 same
~ Any
3.72 32F45129EC2844D419582912E54CEB22 11/09/14/01:18
3.73 2.972.168 17063FFAB205B72ABF7F59582B8A7988 11/10/04/12:56 same
3.74 89C03D80ACE7C4FA914DD699621EB4F8 11/10/25/00:40
4.00 2.977.128 DBB8FB62BE3F2064D31332FCB7575DF1 11/11/22/03:19 same
4.01 9E60379FA979B0440C27C6AEE38754AF 11/12/23/01:10
4.10 2.977.208 B3CD41AB8235906AB41D3DA18D04F00E 12/02/05/23:19 same
4.11 4DDF2C3289AD9BEDF0719DBE1BDA971C 12/02/11/07:15
4.15 ? ? ? ?
4.20 2.977.432 363A2D5EE2246E9CEFCBF1078593C771 12/06/15/02:10 same
4.21 5E08C86EC07E4F227D3591DD9530CC95 12/06/30/01:15
4.23 S 2.977.416 149E5E6AD727B1B37E29D4E8D15D5BB0 12/07/31/00:23 ?
4.25 2.977.432 295B61D9EEE704077FEC870C8EAC7D35 12/09/07/07:04 same
? ? ? ? ?
? ? ? ? ?
? ? ? ? ?
4.78 2.913.480 398A7CA9F0E8449E15FCB33B87C96194 15/12/17/01:19 ?
4.80 ? ? ? ?
4.81 2.913.656 8765A00EE467B8635A13ECCBB1F85B89 16/10/24/19:24 ?
4.82 2.913.752 FCEB6595F9F8E5C77BA36C73C38397D9 17/08/24/15:43 ?
? ? ? ? ?
4.88 2.913.992 D3283D3F3B5CDF68113560829530E7B3 21/04/12/11:34 ?

  ·  Decrypted (elf): changes every firmware version
  ·  Build label: yes, with timestamp, search for -sgpu-sli4
  ·  Target Firmware: yes repeated two times
  ·  Revision: unknown

ps1_newemu.elf (decrypted)
Firmware Bytes MD5 Timestamp Rev
1.00 ~ 2.01 No
2.10 ? ? ? ?
? ? ? ? ?
? ? ? ? ?
3.66 2.708.864 9AB86CFAEB12675F3DB08FCAA3541534 11/06/16/03:54 ?
3.70 2.708.880 7AB7C32901778E3F0C9B8DB45296821B 11/08/05/03:44 same
~ Any
3.72 2863E9B70B4FB6C5A0938FF508C46057 11/09/14/01:18
3.73 2.708.880 871E256771632569D664FF2A1ECE82C3 11/10/04/12:57 same
3.74 8A8AC80CBA58561CC754C6CF66B059AB 11/10/25/00:40
4.00 2.713.832 F9E840430B2BC982CB1A71B7BDD7FC35 11/11/22/03:19 same
4.01 953090CBCB96626899731B711B3D5B6A 11/12/23/01:11
4.10 2.713.720 47E7FA52DB7BDEDF2187EB02D868834D 12/02/05/23:20 same
4.11 8A90DB2A206BE79423A99D4CF2458241 12/02/11/07:16
4.15 ? ? ? ?
4.20 2.713.904 8AC80356D1EFDDCFF7A7AD82136137D2 12/06/15/02:11 same
4.21 E482927E47B00C1478313E343DD652C4 12/06/30/01:15
4.23 S 2.713.888 A2CF9C4C00B40779FB5C529849E0D6A4 12/07/31/00:24 ?
4.25 2.713.904 24107753F0B02075DAB20492BA67167D 12/09/07/07:05 same
? ? ? ? ?
? ? ? ? ?
? ? ? ? ?
4.78 2.649.144 BF78A0DC74084B43777A7F8CE6C7B66A 15/12/17/01:20 ?
4.80 ? ? ? ?
4.81 2.649.272 0C76DE974439B12546EA494639C8EE9A 16/10/24/19:25 ?
Abandoned (last revision)
4.82 2.649.288 C5957F268EE9E1429DE3AF0BC15F1395 17/08/24/15:44 ?
? ? ? ? ?
4.88 2.649.288 4002EC6CB88F5D2D5E7DF0B0F80A6A0A 21/04/12/11:35 ?

  ·  Decrypted (elf): changes every firmware version
  ·  Build label: yes, with timestamp, search for -sgpu-sspu-sli4
  ·  Target Firmware: yes repeated two times
  ·  Revision: unknown

ps1_rom.bin
Firmware Bytes MD5 Rev
1.00 ~ 2.01 No
2.10 ? ? ?
? ? ? ?
3.40 ~ 3.74 4.089.584 FBB5F59EC332451DEBCCF1E377017237 ?
4.00 ~ 4.88 524.288 81BBE60BA7A3D1CEA1D48C14CBCC647B ?

  ·  Format: Not compiled or encrypted for every firmware
  ·  Build label: unknown
  ·  Revision: unknown


Command IDs mapping

All the PS1 emulators have some game settings hardcoded inside them organized in a table using a hierarchy, pretty much the same structure used by ps2_gxemu.self and ps2_softemu.self to store the CONFIGS
There is a point of the hierarchy where is indicated the number of commands and the offset where are located. Every command is composed by ID[4] and data[4] (where the data coould be another offset to load more data from a deeper level of the hierarchy)
That IDs differs in between the PS1 emulator versions because are not a direct ID, it seems every ID is mapped to a different ID (probably static and common for all emu versions) in a separated table

How hardcoded config is read based on ps1emu.

Like mentioned above config is created from 2x u32 values. Lets call first value command, and second value param.
Command is used to calculate address for param, and only param is stored on obtained address.
Emulator then check for params, and if found (usually when not zero) apply settings based on them.

0x10BC8                 lwz       r0, 0(r9)       # load HASH
0x10BCC                 cmpw      cr7, r0, r27    # compare title HASH with one from DB
0x10BD0                 bne       cr7, loc_10BB8  # loop till HASH found
0x10BD4                 slwi      r0, r10, 4      # config number << 4 to get offset from first entry in table
0x10BD8                 addi      r24, r1, 0xAB0+var_A40
0x10BDC                 extsw     r0, r0
0x10BE0                 clrldi    r3, r24, 32
0x10BE4                 add       r29, r0, r8     # r29 now points to game entry in config table
0x10BE8                 lwz       r4, 4(r29)      # load pointer to game ID
0x10BEC                 bl        sub_137FF8
0x10BF0                 nop
0x10BF4                 lwz       r28, 8(r29)
0x10BF8                 cmpwi     cr7, r28, 0
0x10BFC                 ble       cr7, loc_10C58  # check config count is not 0 or less
0x10C00                 lwz       r26, 0xC(r29)   # r26 is now pointer to configs for game
0x10C04                 li        r30, 0
0x10C08                 li        r29, 0
0x10C0C                 lwz       r25, off_17B5D8 # "core.c: CoreCheckTitle: param[%d] = 0x%"...
0x10C10
0x10C10 read_conf_loop:                           # CODE XREF: CoreCheckTitle+2DC↓j
0x10C10                 add       r11, r30, r26   # r11 is now pointer to currently read config for game
0x10C14                 addi      r29, r29, 1     # count...
0x10C18                 clrldi    r11, r11, 32
0x10C1C                 mr        r3, r25         # just for print
0x10C20                 addi      r30, r30, 8     # add 8 so next time in loop we read new config (4),
0x10C20                                           # and new params (4) if game have more than one config
0x10C24                 lwz       r4, 0(r11)      # load command
0x10C28                 lwz       r0, 4(r11)      # load params
0x10C2C                 slwi      r9, r4, 2       # r9 = r4 << 2 so shift our command to the left by 2, and store in r9
0x10C30                 clrldi    r5, r0, 32      # just print again
0x10C34                 addi      r9, r9, 0x10    # add 0x10 to shifted command value
0x10C34                                           # to create address where param of config will be stored
0x10C38                 extsw     r4, r4
0x10C3C                 extsw     r9, r9
0x10C40                 add       r9, r9, r31     # r31 is value that change between emu versions. 
0x10C40                                           # That way emulator can keep correct config IDs without changes to table.
0x10C40                                           # r31 0x2B0930 + what we currently have in r9 after previous calculations.
0x10C44                 stw       r0, 4(r9)       # Store param on finally calculated address + 4. For example for config 04
0x10C44                                           # address will be 0x2B0954.
0x10C48                 bl        print_
0x10C4C                 nop
0x10C50                 cmpw      cr7, r28, r29   # r28 overall config count
0x10C50                                           # r29 currently read count
0x10C54                 bne       cr7, read_conf_loop

Known ps1emu.self commands

  • 0xB param is magic word for libcrypt, but emulator seems to not use it at all(?).
  • 0xE param is divider for 0x204CC00 (psx cpu speed), result is stored on fixed address and used by many functions.
  • 0x15 when param is set to 3, force game reload with ps1netemu. Is not known what other param values do.
  • 0x19 is related to cdrom, xCdromRead use it as first argument.

Commands Info

The command ID's varies in between firmware versions, most probably because new functions was added every few versions, reorganized, etc... and this changes created a "displacement" of the old commands that causes them to increase his ID
At the time of writing this we dont know how to map that variable ID's to an static ID (that could be valid for all firmware versions), so by now in this list is needed to indicate the firmware version where the command ID was found

Command 0x01 (netemu 3.55 up to 4.88)

Used by SLPM_865.49, SLPM_865.50, SLPS_017.16, SLPS_004.16, SLUS_004.33)

  • Valid values found
    • 2 (in SLPM_865.49, SLPM_865.50, SLPS_017.16)
    • 1 (in SLPS_004.16, SLUS_004.33)

Command 0x02 (netemu 3.55 up to 4.88)

Coincidentially this is one of the few commands that preserves his ID in between firmware versions, most probably is because it was one of the first commands implemented (is either the second or the third from the whole command list) and the variable ID given to it is a very low value (so always was kept at a low position in the commands list and was not disturbed by the modifications made to the other commands)
Is used to load a list of sectors, there are only 3 games using it (and the 3 games are libcrypt protected), as example this is the data loaded by Medievil (SCES_003.11), located at absolute offset 0x16298C in ps1_netemu.self from firmware 4.88 

Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

00162980                                      00 00 06 15              ....
00162990  00 00 2A 75 00 00 37 19 00 00 3A 33 00 00 3A D0  ..*u..7...:3..:Ð
001629A0  00 00 3B 1A 00 00 3B 8A 00 00 3C 12 00 00 3E 2F  ..;...;Š..<...>/
001629B0  00 00 3E E5 00 00 5D FC 00 00 71 8E 00 00 7C 17  ..>å..]ü..qŽ..|.
001629C0  00 00 80 35 00 00 A4 3D 00 00 A7 3D 00 00 A8 04  ..€5..¤=..§=..¨.
001629D0  00 00 A8 A9 00 00 A9 19 00 00 A9 90 00 00 AB BB  ..¨©..©...©...«»
001629E0  00 00 AC 7F 00 00 BA B2 00 00 BE E3 00 00 C0 AF  ..¬...º²..¾ã..À¯
001629F0  00 00 C1 93 00 00 C1 C4 00 00 C3 A1 00 00 DA DE  ..Á“..ÁÄ..á..ÚÞ
00162A00  00 00 E7 C1 00 00 FD 3A 00 01 1A 1C 00 01 1D 6A  ..çÁ..ý:.......j
00162A10  00 01 1D CF 00 01 29 EF 00 01 45 E2 00 01 6A 98  ...Ï..)ï..Eâ..j˜
00162A20  00 01 7F BB 00 01 B7 A0 00 01 BB 05 00 01 BF 12  ...»..· ..»...¿.
00162A30  00 01 EE 64 00 02 02 6E 00 02 0B CA 00 02 10 19  ..îd...n...Ê....
00162A40  00 02 37 24 00 02 45 EC 00 02 54 06 00 02 55 A1  ..7$..Eì..T...U¡
00162A50  00 02 5D 48 00 02 62 C8 00 02 81 12 00 02 9B 2D  ..]H..bÈ......›-
00162A60  00 02 BD 04 00 02 C2 AF 00 02 D9 2A 00 02 DC 90  ..½...¯..Ù*..Ü.
00162A70  00 02 E1 3A 00 02 F2 18 00 02 FC C8 00 03 51 CF  ..á:..ò...üÈ..QÏ
00162A80  00 03 52 AA 00 03 72 3F 00 00 00 00              ..Rª..r?....

The libcrypt protection is related with subchannel data stored by sectors, in redump this data is managed with the SBI files, displayed in a hexeditor view in the game page http://redump.org/disc/592/
If we convert the data from the official format to decimal and we compare it with the sector numbers in the SBI file it can be seen the 16 libcrypt protected sectors from the SBI file are included in the official format
The official format seems to include a lot more sectors which purpose is unknown
This is the medievil data from the official format, converted to decimal, and marked the sectors that matches with the SBI file in redump 

00000615 --- to decimal ---> 1557
00002A75 --- to decimal ---> 10869
00003719 --- to decimal ---> 14105 (mentioned in the redump SBI file)
00003A33 --- to decimal ---> 14899 (mentioned in the redump SBI file)
00003AD0 --- to decimal ---> 15056 (mentioned in the redump SBI file)
00003B1A --- to decimal ---> 15130 (mentioned in the redump SBI file)
00003B8A --- to decimal ---> 15242 (mentioned in the redump SBI file)
00003C12 --- to decimal ---> 15378 (mentioned in the redump SBI file)
00003E2F --- to decimal ---> 15919 (mentioned in the redump SBI file)
00003EE5 --- to decimal ---> 16101 (mentioned in the redump SBI file)
00005DFC --- to decimal ---> 24060
0000718E --- to decimal ---> 29070
00007C17 --- to decimal ---> 31767
00008035 --- to decimal ---> 32821
0000A43D --- to decimal ---> 42045 (mentioned in the redump SBI file)
0000A73D --- to decimal ---> 42813 (mentioned in the redump SBI file)
0000A804 --- to decimal ---> 43012 (mentioned in the redump SBI file)
0000A8A9 --- to decimal ---> 43177 (mentioned in the redump SBI file)
0000A919 --- to decimal ---> 43289 (mentioned in the redump SBI file)
0000A990 --- to decimal ---> 43408 (mentioned in the redump SBI file)
0000ABBB --- to decimal ---> 43963 (mentioned in the redump SBI file)
0000AC7F --- to decimal ---> 44159 (mentioned in the redump SBI file)
0000BAB2 --- to decimal ---> 47794
0000BEE3 --- to decimal ---> 48867
0000C0AF --- to decimal ---> 49327
0000C193 --- to decimal ---> 49555
0000C1C4 --- to decimal ---> 49604
0000C3A1 --- to decimal ---> 50081
0000DADE --- to decimal ---> 56030
0000E7C1 --- to decimal ---> 59329
0000FD3A --- to decimal ---> 64826
00011A1C --- to decimal ---> 72220
00011D6A --- to decimal ---> 73066
00011DCF --- to decimal ---> 73167
000129EF --- to decimal ---> 76271
000145E2 --- to decimal ---> 83426
00016A98 --- to decimal ---> 92824
00017FBB --- to decimal ---> 98235
0001B7A0 --- to decimal ---> 112544
0001BB05 --- to decimal ---> 113413
0001BF12 --- to decimal ---> 114450
0001EE64 --- to decimal ---> 126564
0002026E --- to decimal ---> 131694
00020BCA --- to decimal ---> 134090
00021019 --- to decimal ---> 135193
00023724 --- to decimal ---> 145188
000245EC --- to decimal ---> 148972
00025406 --- to decimal ---> 152582
000255A1 --- to decimal ---> 152993
00025D48 --- to decimal ---> 154952
000262C8 --- to decimal ---> 156360
00028112 --- to decimal ---> 164114
00029B2D --- to decimal ---> 170797
0002BD04 --- to decimal ---> 179460
0002C2AF --- to decimal ---> 180911
0002D92A --- to decimal ---> 186666
0002DC90 --- to decimal ---> 187536
0002E13A --- to decimal ---> 188730
0002F218 --- to decimal ---> 193048
0002FCC8 --- to decimal ---> 195784
000351CF --- to decimal ---> 217551
000352AA --- to decimal ---> 217770
0003723F --- to decimal ---> 225855
00000000

Command 0x03 (netemu 3.55 up to 4.88)

Command ID 0x03 seems to match too in between firmware 3.55 and 4.88

Command 0x04 (netemu 3.55 up to 4.88)

Command ID 0x04 seems to match too in between firmware 3.55 and 4.88

Command 0x05 (netemu 3.55 up to 4.88)

Command ID 0x05 seems to match too in between firmware 3.55 and 4.88

Command 0x17 (netemu 4.88) or command 0x15 (netemu 3.55)

This is the libcrypt magic word. This command is used only in 3 games (SCES_016.95, SLES_019.07, SLES_013.01). see: PS1 Custom Patches

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