Editing Talk:PS2 Emulation

==Game CONFIG commands (notepad and worklog)==
All info here related with commands needs to be moved to frontpage at some point

===ps2_netemu command 0x1===
There are some additional internal patches using CONFIG cmd id 0x01, using subs not available in 0x3B list
 condition: 0xBBB5F800, 0x3B949C00, 0x42133A90
 setting: 
   0x18E1F0, sub_4670C (4.70)
   0x348EC8, sub_44338 (4.70)

====Function Mapping====
ps2_netemu.self contains a table (with entry_length=8 and entry_number=variable) where are listed the function offsets used by config command 0x01

This table is used to assign a funct_id to a funct_offset. The funct_id is given by the position of the entry in the table, so the first entry in the table is funct_id=0x00, second entry is funct_id=0x01 and so on

The purpose of this table is to be able use the same funct_id values in the external CONFIG files for netemu, this way even if the func_offset changes in between versions (internally inside the ps2_netemu.self file structure) the funct_id will be the same. The other ps2 emulator types doesnt have this table (doesnt needs it because doesnt uses external CONFIG files)


*funct_offset_table location by ps2_netemu versions:
**Table v1 (the table contains the same data)
***Firmware:370-374 offset:0x897ED8 length:0x1C8
**Table v2 (the table contains the same data)
***Firmware:400-401 offset:0x8970E8 length:0x1C8
**Table v3 (the table contains the same data)
***Firmware:410-411 offset:0x8971E8 length:0x1C8
***Firmware:420-425 offset:0x8972F8 length:0x1C8
**Table v4
***Firmwares 4.30 up to 4.76 was not tested (if someone wants to add this info do it here)
**Table vX (latest)
***Firmware:478-488 offset:0x8063f8 length:0x1E0

Example from ps2_netemu.self 4.88
<pre>
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

008063F0                          00 00 00 00 00 04 2F 70          ....../p
00806400  00 00 00 00 00 04 30 34 00 00 00 00 00 04 47 C0  ......04......GÀ
00806410  00 00 00 00 00 04 46 E0 00 00 00 00 00 04 33 84  ......Fà......3„
00806420  00 00 00 00 00 04 74 5C 00 00 00 00 00 04 6D 20  ......t\......m 
00806430  00 00 00 00 00 04 7C 1C 00 00 00 00 00 04 31 00  ......|.......1.
00806440  00 00 00 00 00 04 31 D8 00 00 00 00 00 04 34 48  ......1Ø......4H
00806450  00 00 00 00 00 04 35 20 00 00 00 00 00 04 45 E8  ......5 ......Eè
00806460  00 00 00 00 00 04 45 0C 00 00 00 00 00 04 44 30  ......E.......D0
00806470  00 00 00 00 00 04 42 54 00 00 00 00 00 04 41 70  ......BT......Ap
00806480  00 00 00 00 00 04 40 8C 00 00 00 00 00 04 60 FC  ......@Œ......`ü
00806490  00 00 00 00 00 04 35 E4 00 00 00 00 00 04 7F C4  ......5ä.......Ä
008064A0  00 00 00 00 00 04 5A 1C 00 00 00 00 00 04 55 90  ......Z.......U.
008064B0  00 00 00 00 00 04 6A DC 00 00 00 00 00 04 5F A8  ......jÜ......_¨
008064C0  00 00 00 00 00 04 7A 88 00 00 00 00 00 04 5C 6C  ......zˆ......\l
008064D0  00 00 00 00 00 04 54 C0 00 00 00 00 00 04 53 F0  ......TÀ......Sð
008064E0  00 00 00 00 00 04 53 20 00 00 00 00 00 04 52 50  ......S ......RP
008064F0  00 00 00 00 00 04 51 80 00 00 00 00 00 04 50 B0  ......Q€......P°
00806500  00 00 00 00 00 04 4F E0 00 00 00 00 00 04 4F 10  ......Oà......O.
00806510  00 00 00 00 00 04 4E 40 00 00 00 00 00 04 4D 70  ......N@......Mp
00806520  00 00 00 00 00 04 4C A0 00 00 00 00 00 04 4B D0  ......L ......KÐ
00806530  00 00 00 00 00 04 4B 00 00 00 00 00 00 04 4A 30  ......K.......J0
00806540  00 00 00 00 00 04 49 60 00 00 00 00 00 04 48 90  ......I`......H.
00806550  00 00 00 00 00 04 66 2C 00 00 00 00 00 04 71 14  ......f,......q.
00806560  00 00 00 00 00 04 6F 9C 00 00 00 00 00 04 6E 24  ......oœ......n$
00806570  00 00 00 00 00 04 59 2C 00 00 00 00 00 04 58 48  ......Y,......XH
00806580  00 00 00 00 00 04 57 64 00 00 00 00 00 04 56 80  ......Wd......V€
00806590  00 00 00 00 00 04 75 60 00 00 00 00 00 00 00 00  ......u`........
008065A0  00 00 00 00 00 04 62 18 00 00 00 00 00 04 36 B4  ......b.......6´
008065B0  00 00 00 00 00 04 7D 28 00 00 00 00 00 04 72 98  ......}(......r˜
008065C0  00 00 00 00 00 04 76 74 00 00 00 00 00 04 6B D4  ......vt......kÔ
008065D0  00 00 00 00 00 04 3F AC                          ......?¬
</pre>

{| class="wikitable" style="float:left; font-size:xx-small; line-height:100%; margin:5px"
! colspan="5" | netemu 0x01 !! gxemu 0x00 !! softemu 0x00
|-
! [[3.70_CEX|3.70]]~{{latestPS3}} !! [[3.70_CEX|3.70]]~[[3.74_CEX|3.74]] !! [[4.00_CEX|4.00]]~[[4.01_CEX|4.01]] !! [[4.10_CEX|4.10]]~[[4.25_CEX|4.25]] !! [[4.78_CEX|4.78]]~[[4.88_CEX|4.88]] !! [[4.78_CEX|4.78]]~[[4.82_CEX|4.82]] !! [[3.72_CEX|3.72]]~[[4.01_CEX|4.01]]
|-
! funct_id !! funct_offset !! funct_offset !! funct_offset !! funct_offset !! funct_offset !! funct_offset
|-
| 0x00 || 0x46720 || 0x42E00 || 0x42EB8 || 0x42F70 || 0x36B40 || 0x2FEF0
|-
| 0x01 || 0x42DB0 || 0x42EC4 || 0x42F7C || 0x43034 || 0x35FB0 || 0x31E38
|-
| 0x02 || 0x44394 || 0x4456C || 0x44560 || 0x447C0 || 0x34068 || 0x30220
|-
| 0x03 || 0x442B4 || 0x4448C || 0x44480 || 0x446E0 || 0x34144 || 0x302FC
|-
| 0x04 || 0x43100 || 0x43214 || 0x432CC || 0x43384 || 0x33F98 ? || 0x30150
|-
| 0x05 || 0x46A90 || 0x46DB4 || 0x47184 || 0x4745C || 0x36CF8 || 0x31D08
|-
| 0x06 || 0x46D64 || 0x46AE0 || 0x46934 || 0x46D20 || 0x34224 || 0x303DC
|-
| 0x07 || 0x47134 || 0x47154 || 0x47524 || 0x47C1C || 0x37850 || 
|-
| 0x08 || 0x42E7C || 0x42F90 || 0x43048 || 0x43100 || 0x33DFC<!--0x33E00 ? (old)--> || 0x2FFB4
|-
| 0x09 || 0x42F54 || 0x43068 || 0x43120 || 0x431D8 || 0x36C04 || 0x31C14
|-
| 0x0A || 0x431C4 || 0x432D8 || 0x43390 || 0x43448 || 0x36EF0 || 0x31FCC
|-
| 0x0B || 0x4329C || 0x433B0 || 0x43468 || 0x43520 || 0x34354 || 
|-
| 0x0C || 0x441BC || 0x44394 || 0x44388 || 0x445E8 || 0x34424 || 0x30518
|-
| 0x0D || 0x440E0 || 0x442B8 || 0x442AC || 0x4450C || 0x34520 || 
|-
| 0x0E || 0x44004 || 0x441DC || 0x441D0 || 0x44430 || 0x345FC || 0x306F0
|-
| 0x0F || 0x43E28 || 0x44000 || 0x43FF4 || 0x44254 || 0x365F0 || 0x31124
|-
| 0x10 || 0x43D44 || 0x43F1C || 0x43F10 || 0x44170 || 0x36510 || 0x31044
|-
| 0x11 || 0x43C64 || 0x43E3C || 0x43E30 || 0x4408C || 0x36430 || 0x30F64
|-
| 0x12 || 0x45CD4 || 0x45EAC || 0x46EA0 || 0x460FC || 0x34DD0<!--0x366C4 ? (old)--> || 0x311F8<!--0x30C28 ? (old)-->
|-
| 0x13 || 0x469C0 || 0x43474 || 0x46864 || 0x435E4 || 0x366C4 || 0x30C28
|-
| 0x14 || 0x4777C || 0x4779C || 0x478CC || 0x47FC4 || 0x34EDC || 0x31304
|-
| 0x15 || 0x455F0 || 0x457C8 || 0x457BC || 0x45A1C || 0x3795C || 0x327B4
|-
| 0x16 || 0x45164 || 0x4533C || 0x45330 || 0x45590 || 0x3521C || 0x31580
|-
| 0x17 || 0x468C8 || 0x469DC || 0x4676C || 0x46ADC || 0x347D0 || 0x308C4
|-
| 0x18 || 0x45B80 || 0x45D58 || 0x45D48 || 0x45FA8 || 0x35300<!--0x373FC ? (old)--> || 0x31664
|-
| 0x19 || 0x4706C || 0x46FC0 || 0x4745C || 0x47A88 || 0x36E28 || 0x31F04
|-
| 0x1A || 0x45844 || 0x45A1C || 0x45A0C || 0x45C6C || 0x37614 || 0x325B4
|}

{| class="wikitable" style="float:left; font-size:xx-small; line-height:100%; margin:5px"
! colspan="5" | netemu 0x01 !! gxemu 0x00 !! softemu 0x00
|-
! [[3.70_CEX|3.70]]~{{latestPS3}} !! [[3.70_CEX|3.70]]~[[3.74_CEX|3.74]] !! [[4.00_CEX|4.00]]~[[4.01_CEX|4.01]] !! [[4.10_CEX|4.10]]~[[4.25_CEX|4.25]] !! [[4.78_CEX|4.78]]~[[4.88_CEX|4.88]] !! [[4.78_CEX|4.78]]~[[4.82_CEX|4.82]] !! [[3.72_CEX|3.72]]~[[4.01_CEX|4.01]]
|-
! funct_id !! funct_offset !! funct_offset !! funct_offset !! funct_offset !! funct_offset !! funct_offset
|-{{cellcolors|#ddddff}}
| 0x1B || 0x45094 || 0x4526C || 0x45260 || 0x454C0 || 0x35434 || 0x31798
|-{{cellcolors|#ddddff}}
| 0x1C || 0x44FC4 || 0x4519C || 0x45190 || 0x453F0 || 0x354F8 || 0x30A88
|-{{cellcolors|#bbbbff}}
| 0x1D || 0x44EF4 || 0x450CC || 0x450C0 || 0x45320 || 0x355BC || 
|-{{cellcolors|#bbbbff}}
| 0x1E || 0x44E24 || 0x44FFC || 0x44FF0 || 0x45250 || 0x35680 || 
|-{{cellcolors|#ddddff}}
| 0x1F || 0x44D54 || 0x44F2C || 0x44F20 || 0x45180 || 0x35744 || 
|-{{cellcolors|#ddddff}}
| 0x20 || 0x44C84 || 0x44E5C || 0x44E50 || 0x450B0 || 0x35808 || 
|-{{cellcolors|#bbbbff}}
| 0x21 || 0x44BB4 || 0x44D8C || 0x44D80 || 0x44FE0 || 0x358CC || 
|-{{cellcolors|#bbbbff}}
| 0x22 || 0x44AE4 || 0x44CBC || 0x44CB0 || 0x44F10 || 0x35990 || 
|-{{cellcolors|#ddddff}}
| 0x23 || 0x44A14 || 0x44BEC || 0x44BE0 || 0x44E40 || 0x35A54 || 
|-{{cellcolors|#ddddff}}
| 0x24 || 0x44944 || 0x44B1C || 0x44B10 || 0x44D70 || 0x35B18 || 
|-{{cellcolors|#bbbbff}}
| 0x25 || 0x44874 || 0x44A4C || 0x44A40 || 0x44CA0 || 0x35BDC || 
|-{{cellcolors|#bbbbff}}
| 0x26 || 0x447A4 || 0x4497C || 0x44970 || 0x44BD0 || 0x35CA0 || 
|-{{cellcolors|#ddddff}}
| 0x27 || 0x446D4 || 0x448AC || 0x448A0 || 0x44B00 || 0x35D64 || 
|-{{cellcolors|#ddddff}}
| 0x28 || 0x44604 || 0x447DC || 0x447D0 || 0x44A30 || 0x35E28 || 
|-{{cellcolors|#bbbbff}}
| 0x29 || 0x44534 || 0x4470C || 0x44700 || 0x44960 || 0x35EEC || 
|-{{cellcolors|#bbbbff}}
| 0x2A || 0x44464 || 0x4463C || 0x44630 || 0x44890 || 0x35158 || 
|-
| 0x2B || 0x467E4 || 0x463DC || 0x46688 || 0x4662C || 0x34994 || 
|-
| 0x2C || 0x465D0 || 0x464B4 || 0x46D28 || 0x47114 || 0x36FC8 || 
|-
| 0x2D || 0x47384 || 0x473A4 || 0x46BB0 || 0x46F9C || 0x3607C || 
|-
| 0x2E || 0x47234 || 0x47254 || 0x46A38 || 0x46E24 ||  || 
|-
| 0x2F || 0x45500 || 0x456D8 || 0x456CC || 0x4592C || 0x34A70 || 
|-
| 0x30 || 0x4541C || 0x455F4 || 0x455E8 || 0x45848 || 0x34B48 || 
|-
| 0x31 || 0x45338 || 0x45510 || 0x45504 || 0x45764 || 0x34C20 || 
|-
| 0x32 || 0x45254 || 0x4542C || 0x45420 || 0x45680 || 0x34CF8 || 
|-
| 0x33 || 0x46E74 || 0x46EB8 || 0x47288 || 0x47560 || 0x37714 || 
|-
| 0x34 || {{cellcolors|#CC5555}} 0x00000 || {{cellcolors|#CC5555}} 0x00000 || {{cellcolors|#CC5555}} 0x00000 || {{cellcolors|#CC5555}} 0x00000 ||  || 
|-
| 0x35 || 0x45DF0 || 0x45FC8 || 0x46274 || 0x46218 ||  || 
|-
| 0x36 || 0x4336C || 0x43544 || 0x43538 || 0x436B4 ||  || 
|-
| 0x37 || 0x474E0 || 0x47500 || 0x47630 || 0x47D28 ||  || 
|-
| 0x38 || 0x46BA0 || 0x46BF0 || 0x46FC0 || 0x47298 ||  || 
|-
| 0x39 || {{no}} || {{no}} || {{no}} || 0x47674 ||  || 
|-
| 0x3A || {{no}} || {{no}} || {{no}} || 0x46BD4 ||  || 
|-
| 0x3B || {{no}} || {{no}} || {{no}} || 0x43FAC ||  || 
|}{{clear}}

===ps2_netemu command 0x4===
Patch SPE 3 program (eedma) by searching for ila r4, xxxxx, starting at 0x178A0 and replacing them with (0x42000004 | ((value << 7) & 0x1FFFF80)<br>
0x42000004 is ila r4 opcode. Due to opcode encoding example result of that patch with value 0x08 will be 0x42000404 (ila r4, 0x08).
There is little bit more than that, but main purpose is just to patch SPE program behavior.
* What are the valid values? The official config from The Suffering uses a 0x8 value, yet the flashing does still happen. Increasing it to 0x20 seems to fix the flashing.--[[User:Agrippa|Agrippa]] ([[User talk:Agrippa|talk]]) 14:42, 22 February 2022 (UTC)
** 0x00 - 0x3FFFF. Well you can use higher values, but it will be truncated by mask to something below 0x40000 anyway. Default is 0x12345 if i understand correctly. --[[User:Kozarovv|Kozarovv]] ([[User talk:Kozarovv|talk]]) 16:29, 22 February 2022 (UTC)

===ps2_netemu command 0x5===
This command seems to be disabled in netemu, but is used in gxemu with ID 0x4

*There are several games that uses it in his config data hardcoded inside ps2_gxemu.self such:
**SLES-51823 | 1 | cmd: 0x4 Hunter: The Reckoning Wayward
**SLES-54135 | 1 | cmd: 0x4 Grand Theft Auto: Liberty City Stories
**SLES-54136 | 1 | cmd: 0x4 Grand Theft Auto: Liberty City Stories
**SLES-54622 | 1 | cmd: 0x4 Grand Theft Auto: Vice City Stories
**SLES-54623 | 1 | cmd: 0x4 Grand Theft Auto: Vice City Stories
**SLPM-65340 | 1 | cmd: 0x4 Shinseiki Evangelion: Ayanami Ikusei Keikaku with Asuka Hokan Keikaku
**SLPM-66275 | 1 | cmd: 0x4 Onimusha : Dawn of Dreams
**SLUS-20001 | 1 | cmd: 0x4 Tekken Tag Tournament
**SLUS-21423 | 1 | cmd: 0x4 Grand Theft Auto: Liberty City Stories
**SLUS-21590 | 1 | cmd: 0x4 Grand Theft Auto: Vice City Stories

This command is not existing in ps2_netemu because SPE program which is patched by it is totally rewritten for netemu. Config patch EEDMA SPE program to set different handling for DIRECT/DIRECTHL VIF1 commands.<br>
Edit: Ok, this is not really true, code is still existing in new eedma. Right after writing this i found that ps2_netemu is patching that at eedma init (0x1F77C in latest netemu). So this command is always enabled in ps2_netemu. Weird solution, wasn't better to just change pointers in spe program instead of patching that on init?

===ps2_netemu command 0x0B===
There is a lot of misunderstanding about that command.

Offset seems to be dependent on read mode, is not about what media we use. This is dependent how game read data, more precisely how game read that one sector we want to patch. 

PCSX2 "CDVD reads" logs can help here:

'''CDRead requested block size (CD disc):'''
*2048 = Offset + 0x18 (skip 12 sync bytes, 4 of header, and 8 of subheader)
*2328 = Offset + 0x18 (skip 12 sync bytes, 4 of header, and 8 of subheader)
*2340 = Offset + 0x0C (skip only 12 bytes of sync data)

'''DVDRead requested block size (DVD Disc):'''
*2064 = Offset match, but only until the 349th sector. Otherwise is offset - 0x0C because that read mode see data as ID DATA (4) + ID DATA EDC (2) + Reserved bytes (6) + 2048 data + EDC (4). Why there is some weirdness that about first sectors, no idea. Maybe it is something common for DVD discs that i'm not aware off. 

"Offset + XX" for CD assume that you use Isobuster RAW mode. "Offset - XX" for DVD assume that you use Isobuster NON RAW mode (ISO can't store all data, so is missing ID/Resv bytes too.<br>
Keep in mind there is a bug in pcsx2 where fastboot "force" 2048 CD read on DVD disc for executable. That one will match 2064 read for us.

* You are very right. I was not aware about different read modes you can specify in the sceCdRead command. That makes sense and that explains that Freekstyle issue. Regarding the whole offset misunderstanding, I know it could be confusing sometimes when you open the mounted file system through the HxD for example (only data bytes are seen). It is important to load the image file in the hex editor directly (or use the "Load image file" in HxD), or check the RAW box in the Isobuster's sector viewer.<br> When it comes to the DVD discs, I know the offset correction is somehow related to the DVD RAW 2064 bytes per sector mode. But I am not sure if it is not applied until the 349th sector precisely - it is what I noticed by looking into the Psychonauts and Street Racing Syndicate configs. The latter has got the patch data applied to the 349th sector without the 0xC correction at all. It is the farthest example I have found.--[[User:Agrippa|Agrippa]] ([[User talk:Agrippa|talk]]) 14:47, 20 February 2022 (UTC)
* The next 0x0B sector DVD patch in ascending order is in the Ace Combat Zero: The Belkan War config (402nd sector). It does use the +0xC correction. So it is somewhere between 349th and 402nd sector the correction starts to be applied.--[[User:Agrippa|Agrippa]] ([[User talk:Agrippa|talk]]) 14:00, 22 February 2022 (UTC)

===ps2_netemu command 0x0C===

These pairs of parameters: 0x0001 and 0x0400; 0x0001 and 0x0800; 0x0001 and 0x0180 fix few missing sound effects in the Klonoa 2. The side effect is slightly longer loading times in general. This game is known for its various audio buffer issues related to the CDVD speed.
* I actually suspected this can be some delay for reads, but default value is (1, 0x1000) so doesn't really fit for delay. Since Shadowman 2 use it, and have known CD issue. Testing Shadowman2 without config can be interesting, if i'm right there will be a lot of broken textures right after you take control of main character. With broken Shadowman2 it will be easy to know that lower values are "better" or higher values are "better". That should help to understand what's going on. Assuming that SM2 really break without config... --[[User:Kozarovv|Kozarovv]] ([[User talk:Kozarovv|talk]]) 19:10, 3 March 2022 (UTC)
** Tested Shadowman with and without config. No texture corruption either way, but it seems like the config helps with frame rate issues maybe caused by streaming in contents from the disc? Either that or placebo. --[[User:Mrjaredbeta|Mrjaredbeta]] ([[User talk:Mrjaredbeta|talk]]) 02:39, 4 March 2022 (UTC)
*** Well that's "unfortunate" because Shadowman2 would be perfect test case here. I noticed that Shadowma2 have hardcoded bios settings "CDVD_READ_DELAY", so maybe is handled there. --[[User:Kozarovv|Kozarovv]] ([[User talk:Kozarovv|talk]]) 19:11, 4 March 2022 (UTC)

===ps2_netemu command 0x12===

====type 1====
Playground discussion, unsure about clrlslwi  r11, r0, 16,3 result

<pre>
 Syphon Filter The Omega Strain
 298  00 00 00 00 
 29C  00 00 00 00 
 2A0  01 00>02 00< Type1, Count 2
 2A4  31 00 99 18  
 2A8  32 00 B6 18 


 type 1: (Syphon Filter The Omega Strain	)
	*0x48  | ptr to 1st value *0x2A4 (0x15F)
	*0x50  | count of type values

        (0x18990031 >> 0xC) & 0xFFFF0 = 0x18990
        (0x18B60032 >> 0xC) & 0xFFFF0 = 0x18B60

	store value in [0x18990 + ??? ] 
	
seg017:0000000000198498 next_value:                             # CODE XREF: read_id0x12_type_1+120�j
seg017:0000000000198498                 lwz       r0, 0(r10)    # -> 0x18990031
seg017:000000000019849C                 addi      r8, r8, 1     # counter
seg017:00000000001984A0                 ld        r29, 0(r31)
seg017:00000000001984A4                 addi      r10, r10, 4   # ptr to next value
seg017:00000000001984A8                 rlwinm    r28, r0, 20,12,27 # r28 = (r0 >> 12) & 0xFFFF0 = (0x18990031 >> 12) & 0xFFFF0 = 0x18990
seg017:00000000001984AC                 clrlslwi  r11, r0, 16,3 # r11 = 0x0031 << 3 = 0x188
seg017:00000000001984B0                 add       r26, r28, r29 # r26 = 0x18990 + ??
seg017:00000000001984B4                 stw       r11, 4(r26)   # store 0x62000? or 0x188? in r26
seg017:00000000001984B8                 lwz       r5, 0x50(r31) # count
seg017:00000000001984BC                 cmplw     cr6, r5, r8
seg017:00000000001984C0                 bgt       cr6, next_value
</pre>

====type 2====

Fix on Interpretation?

<pre>
Primal
298  00 00 00 04 
29C  00 00 00 00  
2A0  02 00>03 00< Type 2, Count 3
2A4  5F 01 00 00 	
2A8  8D BD 6F 2C 	
2AC  67 03 00 00  	
2B0  02 00>03 00< Type 2, Count 3
2B4  6B 01 00 00 	
2B8  31 35 70 E9 	
2BC  72 03 00 00  	
2C0  03 00>02 00< Type 3, Count 2
2C4  60 9B 39 10 
2C8  18 9C 39 10	
2CC

type 2:
	*0x20C | counter
	*0x210 | 1st value: 0x15F      -> only gets compared, if passed check 2nd value
	*0x214 | 2nd value: 0x2C6FBD8D -> only gets compared, if passed use *0x218 + *0x21C
	*0x218 | 1 ( = count - 2)
        *0x21C | ptr to 3rd value *0x2AC (0x367)

</pre>

====type 3====

<pre>
 Example Primal
	*0x11B4| counter
	*0x11B8| -1 -> 0x399B60? 
	*0x11BC| 0 -> 0x399B60?
	*0x11C0| ptr to *0x2C4 values
	*0x11C4| count (2)

	r11 = r0 & 0xFFFFFFF = 0x10399B60 & 0xFFFFFFF = 0x399B60
	0x10399C18 & 0xFFFFFFF = 0x399C18

	r3 = r31 >> 28 = 0x10399B60 >> 0x1C = 1
	a check if 1,2
</pre>

====type 4====

         cmpwi     cr7, r0, 4
         bne       cr7, panic_dword_1967BC
         srwi      r9, r6, 1     # r9 = r6 >> 1 = count >> 1
         addi      r11, r4, 4
         stw       r9, 0x1238(r31) save count>>1
         std       r11, 0x1240(r31) save ptr to table values start
	---big handler, different register settings?---

===ps2_netemu command 0x29===
Something related with read time, maybe seek time. First value is meant to be lower than second value, but this is not requirement.
Code that use it seems to delay some read/seek operation by multiply of first, or second value depending which sector is currently read (or maybe which part of disc actually). Here is code from one of fuctions that use values from that command, keep in mind that "mecha" is just fancy name for cdvd in that emu.
 if ((75 * cdvd.CrtSecond + 4500 * cdvd.CrtMinute + cdvd.CrtFrame - 150) >= *(mecha.unk_0x60))
     a = *(cmd_0x29_val_2);
 else
     a = *(cmd_0x29_val_1);
 
 b = 4835703278458516699;        // read https://munroesj52.github.io/vec__int64__ppc_8h.html (search on page for that number).
 c = (79800000 * a * b) >> 64;   // 0x4C1A6C0 (79800000) is value that lv1 repo key be.clock return. 
 d = c >> 18;                    // This and 2 above are generally used as a division by multiply.
 e = get_timebase_reg();
 if ( e == 0 )
 {
   do
     e = get_timebase_reg();
   while ( e == 0 );
 }
 
 f = e - *(mecha.unk_0x24);
 if ( f >= d )
 {
   MECHA_update_status(mecha);
   result = unlock_sc06(0x8000LL);
 }
 
 else
 {
    do
     e = get_timebase_reg();
   while ( e == 0 );
   *(mecha.unk_20) = d - f + e;
   *mecha.unk_00 = 5;
   result = unlock_sc06(0x8000LL);
 }

===ps2_netemu command 0x4D===
Ok, i don't get that config. Here is what happen in assembly:
 0xD820   ilhu      r19, 0x7FFF
 0xD824   lqr       r20, Q_cfg_0x4D   ; 0x3F800000 in wild arms
 0xD82C   iohl      r19, 0xFFFF
 0xD834   and       r17, r80, r19     ; r17 = Q & 0x7FFFFFFF mask
 0xD840   ceqi      r15, r17, 0       ; r15 = r17 (shortcut to move 0 or value if exist to r15)
 0xD844   lqr       r10, ST_Q
 0xD84C   cwd       r9, 0x30+var_30+8(sp)
 0xD850   rotqbyi   r16, r20, 4      ; load mask from config to r16
 0xD858   and       r12, r15, r16    ; tempQ & 0x3F800000 (r15 and with mask from cfg 0x3F800000)
 0xD860   or        r5, r80, r12     ; or r80(Q) with r12(Q masked with 0x3F800000)
 0xD868   shufb     r7, r5, r10, r9  ; Prepare correct write for Q (r5 stored to r10 + 8)
 0xD870   stqr      r7, ST_Q         ; write result as Q value in STQ
I removed irrelevant code that setup RGBA for readability, its not affecting Q. So my point is that all that masked Q is finally ored with r80. So with whole untouched Q value. Doen't that make all those operations irrelevant, or i made some mistake here?<br>
This config can be quite important because it should help to fix issues like Galerians Ash without dirty static patches. More games affected: [[https://github.com/PCSX2/pcsx2/issues/5137 | List]]

==XMB messages related with PS2 Emulation==
{{Boxcode|title=explore_category_sysconf.rco\Text\English.xml|code=<syntaxhighlight lang="xml">
 <Text name="msg_ps_ps2_upconvert">PS/PS2 - Upscaler</Text>
 <Text name="msg_ps_upconvert">PS - Upscaler</Text>
 
 <Text name="msg_ps_ps2_smoothing">PS/PS2 - Smoothing</Text>
 <Text name="msg_ps_smoothing">PS - Smoothing</Text>
 <Text name="msg_ps_ps2_smoothing_explanation">Reduces the roughness of the displayed image.</Text>
</syntaxhighlight>}}

{{Boxcode|title=game_ext_plugin.rco\Text\English.xml|code=<syntaxhighlight lang="xml">
 <Text name="msg_error_cannot_play_ps2disc_scee">This title is not currently compatible with the PS3™ system. Please visit faq.eu.playstation.com/bc for a list of PlayStation®2 format software titles that are compatible, and to update the System Software that will enable your PS3™ system to play additional PlayStation®2 format software titles.</Text>
 <Text name="msg_error_cannot_play_ps2disc_scea">This title is not currently compatible with the PS3™ system. If you update your system software the title may become compatible with your system. Please visit http://www.us.playstation.com/Support/CompatibleStatus to check whether a specific PlayStation®2 format software title is compatible with the PS3™ system.</Text>
 <Text name="msg_error_cannot_play_ps2disc_scej">This title is not currently compatible with the PS3™ system. If you update your system software the title may become compatible with your system. Please visit http://www.jp.playstation.com/ps3/status/ to check whether a specific PlayStation®2 format software title is compatible with the PS3™ system.</Text>
 <Text name="msg_error_cannot_play_ps2disc_scek">This title is not currently compatible with the PS3™ system. If you update your system software the title may become compatible with your system. Please visit http://www.playstation.co.kr/info/bc to check whether a specific PlayStation®2 format software title is compatible with the PS3™ system.</Text>
 <Text name="msg_error_cannot_play_ps2disc_sceasia">This title is not currently compatible with the PS3™ system. If you update your system software the title may become compatible with your system. Please visit http://asia.playstation.com/status to check whether a specific PlayStation®2 format software title is compatible with the PS3™ system.</Text>
 
 <Text name="msg_cannot_run_ps2_fromat_corretly_stop">A problem has occurred. This PlayStation®2 format software was forced to quit.</Text>
</syntaxhighlight>}}

{{Boxcode|title=explore_plugin_full.rco\Text\English.xml|code=<syntaxhighlight lang="xml">
 <Text name="msg_setting_file_ps2">Settings File (PlayStation®2)</Text>
 <Text name="msg_your_bb_navigator">Your PlayStation®BB Navigator</Text>
 <Text name="msg_system_driver_ps1">System Driver</Text>
 <Text name="msg_system_driver_ps2">System Driver (PlayStation®2)</Text>
 
 <Text name="msg_error_cannot_play_ps2_format">This model of the PS3™ system is not compatible with PlayStation®2 format software.</Text>
</syntaxhighlight>}}

==Obsolete experiments==
This is kept here for historical purposes, but needs to be rewritten or deleted

===Getting Playstation 2 Software Emulator working===

Method (on Firmware 3.55, without! Cobra-USB Dongle or Downgrade) for all consoles (fat & slim).

 1. Replace following files on your consoles /dev_flash/
    with the ones included in this archive
    p3dwik-ps2compatfiles.rar
 2. Get into Factory Service Mode (FSM Tool/Dongle)
 3. Insert your Original PS2 Game Disc
 4. It will run.

Note: Backups wont work. You're getting the compatibility of the 2.60 software emulator with all of its bugs.

Download: [http://www.sendspace.com/file/bm9z9v p3dwik-ps2compatfiles.rar]<br>
Possible compatibility Lists:
* http://tortuga-cove.com/forums/viewtopic.php?f=57&t=530
* [[Talk:Emulation#PS2.2FPStwo]]


====boot_ps2====
http://foxbrew.org/ps3/otheros-utils/boot_ps2.git <br />
http://www.multi...upload.com/QKK7ETPHXZ boot_ps2-src.rar (1.43 KB) <br />
http://www.multi...upload.com/YCZ63Y6TQ5 boot_ps2.pkg (69.17 KB) <br />

any chance of having this package resigned for 4.21 cfw? might be useful to see if it'll boot ps2_netemu.self LPAR.

(can boot ps2lpar, but also petitboot if otheros installed! 50:50 chance)

[http://rghost.net/42586725 boot_ps2 4.xx eboots.zip (153 KB)] <br /> installing 3.55 pkg and replacing the eboot and editing the sfo should work.

=== Enable Playstation 2 on non BC's===

[[http://www.ps3devwiki.com/index.php?title=Emulation#Getting_Playstation_2_Software_Emulator_working Getting Playstation 2 Software Emulator working]]

[[Image:Vsh_ps2_change1.png|left|thumb|400px|XMB Game Settings non BC/BC,patched]]<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>

==== Service Mode in relation to PS2 emulation tests ====
* Service mode resets display settings (on default it uses HDMI with composite on MultiAV connector) - this means that users of Component cables can get garbled screen / no display output (in tests below, the primairy screen) unless using composite wiring/screen (in tests below, the secondairy screen).

* Service Mode also resets user presets like disc autoboot, so it needs to be disabled again if needed.

* Any made Virtual Memory Cards previously will be removed and you will have no access to them, nor be able to create one.

* When PS3 is switching to PS2, connection with Sixaxis / Dualshock 3 will be lost (even when using USB wired connection). In some cases easily resyncable by using PS button, but in other cases the leds stay off and the controller cannot be used (until ps2 mode is exited or console rebooted)

* As a workaround for above wireless controller issue, you can use an USB2PS2 converter and connect an old PS2 / Dualshock2 controller.

==== tests on 2000 series PS3 Slim ====
Testplatform:
 SKU: 2000 series slim (minver 2.70)
 Firmware: 3.55 'Rogero 3.4' mmap114+peek/poke but no SS-patches
 Memorycards: MC:PS1 in slot1, MC:PS2 in slot2.
 Mainscreen: Component+Composite 576i+P/720i+P//1080i
 Sec.screen: Composite 576i
 48 titles tested (PAL disc on PAL SKU) // [[User:Euss|Euss]]

* Without Factory Service Mode : gives "Incompatible Data" when inserting PS2 disc

* When enabling [http://www.ps3devwiki.com/files/devtools/lv2-v9-pkg/ LV2Patcher] without factory service mode (patch4 set as http://pastie.org/private/jp8zhvuocjz95cfrjm0uzg) : no changes in XMB:Game (still only PS upscaler/smoothing, no PS2 mention at all)

* When enabling [http://www.ps3devwiki.com/files/devtools/lv2-v9-pkg/ LV2Patcher] without factory service mode (patch4 set as http://pastie.org/4355919) : gives XMB:Game PS2 smoothing/upscaling options, it also make an inserted disk to be seen as PS2 format. Still same problem of ¨incompatible title¨ and loss of BT/settings. Also after returning to XMB, it no longer sees the disc as PS2 format but as incompatible data (which suggests the lv2 patch is undone, as lv2 is reloaded when returning from the ps2 lpar)

* Using [http://www.ps3devwiki.com/files/OtherOSplusplus/misc/boot_ps2.pkg boot_ps2.pkg] without factory service mode : no resetting of date/time/displayoutput (still output on mainscreen), but all connection to any bound bluetooth device is lost, even when connected via USB (need PS button reactivation), and after a long while comes up with the message that the title is not compatible and that the ps3 needs to be updated (Basic nag screen that is on BC PS3s when inserting a noncompatible title). 

* With Factory Service Mode enabled (there are no Xmb options to combinetest with [http://www.ps3devwiki.com/files/devtools/lv2-v9-pkg/ LV2Patcher] or [http://www.ps3devwiki.com/files/OtherOSplusplus/misc/boot_ps2.pkg boot_ps2.pkg]): gives ´PS2 disc´ detected at disc icon, but starting gives: resetting of date/time/displayoutput (effectively disabling my mainscreen), then all connection to any bound bluetooth device is lost, even when connected via USB (needs multiple PS button reactivation), and after a long while comes up with the message that the title is not compatible and that the ps3 needs to be updated (Basic nag screen that is on BC PS3s when inserting a noncompatible title).

In short: [http://www.ps3devwiki.com/files/OtherOSplusplus/misc/boot_ps2.pkg boot_ps2.pkg] and Factory Service Mode seem to enable simulare (it tries to boot it) while [http://www.ps3devwiki.com/files/OtherOSplusplus/misc/boot_ps2.pkg boot_ps2.pkg] gives you more options e.g. using [http://www.ps3devwiki.com/files/devtools/lv2-v9-pkg/ LV2Patcher].
Perhaps hardswapping out all the dev_flash ps2 emu files for the same software only emulator would circumvent the 'incompatible title' message.


==== Second test: FW 2.70/3.15 ==== 
Silent Hill : gives disk icon "unsupported data" and error message like "This model of the PS3 system is not compatible with Playstation2 format software" when run via disc icon. Using [http://www.ps3devwiki.com/files/OtherOSplusplus/misc/boot_ps2.pkg boot_ps2.pkg] gives title not supported error message like "This title is not currently compatible with the PS3 system".

==== Third test: FW 3.55 OtherOS++22GB (with SS Patches) ==== 
Silent Hill : gives disk icon "unsupported data" and error message like "This model of the PS3 system is not compatible with Playstation2 format software" when run via disc icon. Using [http://www.ps3devwiki.com/files/OtherOSplusplus/misc/boot_ps2.pkg boot_ps2.pkg] gives blackscreen lockup, not reacting on PS button, or powerbutton, requiring removing powercord.


===== considering titles to test =====
* http://en.wikipedia.org/wiki/List_of_PlayStation_3_backward_compatible_PlayStation_2_and_PlayStation_games
* http://tortuga-cove.com/forums/viewtopic.php?f=57&t=530
* http://us.playstation.com/support/compatiblestatus/index.htm

These have no listed issues:
* Half-Life
* Hulk
* Medal of Honor: Frontline
These have minor issues listed (but should still play):
* Silent Hill 3
* Second Sight

==== tests on CECHC04 (partial BC) ====
on 3.41 or on 3.55 in normal XMB mode (no disc icon in XMB): boot_ps2.pkg gives no resetting of date/time/displayoutput (still output on mainscreen), but all connection to any bound bluetooth device is lost, even when connected via USB (need PS button reactivation), and after a long while comes up with the message that the "The system was not turned off properly" as if it had experienced poweroff and from there booted back to XMB. It then returns to the XMB, but first gives an error screen, mentioning 0x80028F17 occured (''PS2 mode error 	0x80028F17 	"An error occurred during the start operation (80028F17)," PlayStation 2 disc Boot Error, also related to PS1 PSN games.'')

on 3.41 or on 3.55 in normal XMB mode (disc icon in XMB): boot_ps2.pkg gives resetting of date/time/displayoutput (no output on mainscreen), but all connection to any bound bluetooth device is lost, even when connected via USB (need PS button reactivation). The game is playable on secondary screen, and exit to XMB with holding PS button goes without 0x80028F17 errors, but does give the "The system was not turned off properly" error.

no disc icon:
* Medal of Honor: Rising Sun
* Half-Life

disc icon:
* Hulk
* Second Sight
* Silent Hill 3

==== Renaming ps2_netemu to ps2_emu ====

Tested renaming ps2_netemu.self to ps2_emu.self on CECHB01/rogero 4.21 with dev_blind mounting via multiMAN but boots to black screen, no disc activity, but controller shuts off and is synced. No PS button menu or anything.

boot_ps2.pkg boots, no disc activities, then throws up an error depending if the file is resigned for 4.21 or not. (tried both a resigned and the existing version)


==== PS2 on non BC HW - Tests ====

{| class="wikitable sortable"
|-
! rowspan="2" | Title !! rowspan="2" | DiscID !! colspan="2" | Disc Icon !! colspan="3" | ps2_softemu !! rowspan="2" | Remarks
|-
! <abbr title="Normal Mode">Normal</abbr> !! <abbr title="Factory Service Mode">FSM</abbr> !! 2.50 !! 2.60 !! 2.70
|-
| Action Replay MAX || SCED54409 ||  || {{ps2cd}} ||  ||  || {{no}} || 
|-
| Battlefield 2 Modern Combat || SLES53729 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Constantine || SLES52872 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Demo Disc 3-073-543-11 || PBPX95514 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| EyeToy Play || SCES51513 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| EyeToy Play 2 || SCES52748 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| EyeToy Play 3 || SLES53315 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Freedom Fighters || SLES51467 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Ghost in the Shell Standalone Complex || SLES53020 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| GoldenEye Rogue Agent || SLES52974 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Guerrilla Strike || SLES53344 ||  || {{ps2cd}} ||  ||  || {{no}} || 
|-
| Gunfighter 2 Revenge of Jessy James || SLES51289 ||  || {{ps2cd}} ||  ||  || {{no}} || 
|-
| Half Life || SLES50504 ||  ||  {{ps2cd}} ||  ||  || {{no}} || 
|-
| HDLoader || - ||  || {{ps2cd}} ||  ||  || {{no}} || 
|-
| International Golf Pro || SLES52349 ||  || {{ps2cd}} ||  ||  || {{no}} || 
|-
| Jet Ion GP || SLES50544 ||  || {{ps2cd}} ||  ||  || {{no}} || 
|-
| killer7 || SLES53366 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Kya Dark Lineage || SLES51473 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| London Racer Destruction Madness || SLES53654 ||  || {{ps2cd}} ||  ||  || {{no}} || 
|-
| London Racer Police Madness || SLES53536 ||  || {{ps2cd}} ||  ||  || {{no}} || 
|-
| Manhunt || SLES52023 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Max Play - 10 Classic Retro Games || - ||  || {{ps2cd}} ||  ||  || {{no}} || 
|-
| Medal of Honor European Assault || SLES53332 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Medal of Honor Frontline || SLES50684 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Medal of Honor Rising Sun || SLES51873 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Medal of Honor Vanguard || SLES54683 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Men in Black II Alien Escape || SLES50789 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Network Access Disc || SCES51578 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| OPM #66 || SCED54409 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| OPM #67 || SCED54410 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| OPM #68 || SCED54412 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| OPM #69 || SCED54413 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| OPM #70 || SCED54415 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| OPM #72 || SCED54417 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| OPM #73 || SCED54418 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| OPM #74 || SCED55113 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| OPM #75 || SCED55114 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| OPM #77 || SCED55117 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| OPM #79 || SCED55119 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Perfect Ace Pro Tournament Tennis || SLES51735 ||  || {{ps2cd}} ||  ||  || {{no}} || 
|-
| Prisoner of War || SLES50397 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Ratchet & Clank 3 || SCES52456 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Red Baron || SLES53434 ||  || {{ps2cd}} ||  ||  || {{no}} || 
|-
| SAS Anti-terror Force || SLES53435 ||  || {{ps2cd}} ||  ||  || {{no}} || 
|-
| Second Sight || SLES52670 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Seek and Destroy || SLES51603 ||  || {{ps2cd}} ||  ||  || {{no}} || 
|-
| Silent Hill 3 || SLES51434 ||  || {{ps2dvd}} || {{yes}} ||  || {{no}} || 
|-
| Socom US Navy SEALs || SCES50928 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Socom II US Navy SEALs || SCES51904 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Socom 3 US Navy SEALs || SCES53300 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Socom US Navy SEALs Combined Assault || SCES54477 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Swap Magic 3 plus (PAL version 3.6) CD || SCED54409 ||  || {{no}} || - ||  || {{no}} || 
|-
| Swap Magic 3 plus (PAL version 3.6) DVD || SCED54409 ||  || {{ps2dvd}} || {{yes}} ||  || {{no}} || 
|-
| Tenchu Wrath of Heaven || SLES50679 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Terminator 3 Rise of the Machines || SLES52152 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| The Great Escape || SLES51315 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| The Hulk || SLES51508 ||  || {{ps2dvd}} || {{yes}} ||  || {{no}} || 
|-
| The Matrix Path of Neo || SLES53799 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| The Plan || SLES53965 ||  || {{ps2cd}} ||  ||  || {{no}} || 
|-
| Time Crisis 3 || SCES51844 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Tom Clancy's Ghost Recon || SLES51181 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Tom Clancy's Rainbow Six 3 || SLES52288 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Tom Clancy's Splinter Cell || SLES51466 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Tom Clancy's Splinter Cell Chaos Theory || SLES53007 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Tom Clancy's Splinter Cell Pandora Tomorrow || SLES52149 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
| Trapt || SLES53824 ||  || {{ps2dvd}} ||  ||  || {{no}} || 
|-
|}

==== Tests on NON-BC CECHP01/NTSC-U (Firmware 2.60/boot_ps2.pkg) ====
<br>
<br>Amplitude - Intro prompts are completely glitched, unresponsive to controller input.
<br>Backyard Football 2007 - Graphical glitches during menu and gameplay. Frame rate is okay.
<br>Boogie - Intro FMV runs very slow, fails to recognize input after the title screen.
<br>MLB 08: The Show - Intro videos run smoothly. Menus load with no issue. Gameplay is extremely slow with graphical glitches. Network configuration utility is completely garbled.

-- Moose

Comparative listings: http://tortuga-cove.com/forums/viewtopic.php?f=57&t=530

==Hidden/Inaccessible menu in ps2_emu==

Apparently PS2EMU (CECH A/B) have some hidden menu that is able to print IOP configs from bios (XPARAM.ELF), i didn't found way to get there, my only idea is replacing other menu with that one in jump case at 0x5D980 (emu around 4.78). Case 21, and 22 is what seems to be hidden menu. 
More info about printed data: https://www.psdevwiki.com/ps3/PS2_Emulation#TitleID.2FDiscID_in_ps2_netemu.self

==Crazy Taxi check==
Emulators ps2_netemu, and ps2_gxemu (maybe others too), after calculating game hash perform compare check to 0x2BD12D81ED.
ID match US release of Crazy Taxi. This id is kinda special, because Swap Magic CD version, and some other Datel products like Action Replay use Crazy Taxi TOC in their retail discs.
Is known that they literally ripped part of disc (with key/logo, and TOC), and frankesteined it with own products.
So mentioned check first compare hash, and if that match, then run function that perform another check at disc sector 267559 (0x41527), so exactly where main executable is.
I didn't figured out what next, but this is probably anti AR/Datel/SM check. What's weird, there seems to be nothing for TimeSplitters2 which if i recall correctly was used for DVD version of Swap Magic. 

==CDVD Commands==
===Netemu===
<pre>
4.75 and up.

Supported CDVD N Commands:

opd_ptr  num   name
0x934AB0 0x00: N_CD_NOP
0x934AB8 0x01: N_CD_RESET
0x934AC0 0x02: N_CD_STANDBY
0x934AC8 0x03: N_CD_STOP
0x934AD0 0x04: N_CD_PAUSE
0x934AD8 0x05: N_CD_SEEK
0x934AE0 0x06: N_CD_READ
0x934AE8 0x07: N_CD_READ_CDDA
0x934AF0 0x08: N_DVD_READ
0x934AF8 0x09: N_CD_GET_TOC
0x934B00 0x0A: N_CMD_A                      panic
0x934B08 0x0B: N_CMD_B                      panic
0x934B10 0x0C: N_CD_READ_KEY
0x934B18 0x0D: N_CMD_D                      panic
any command above 0x0D                      panic

Supported CDVD S Commands:

opd_ptr  num   name
0x934B20 0x00: SCMD_Return_0
0x934B28 0x01: SCMD_GetDiscType             panic
0x934B30 0x02: SCMD_CdReadSubQ              panic
0x934B38 0x03: SCMD_Mecacon_command         (support 0x00, 0x01 ,0x30, 0x45 sub cmds)
0x934B40 0x04: SCMD_0x04                    panic
0x934B48 0x05: SCMD_CdTrayReqState
0x934B50 0x06: SCMD_CdTrayCtrl
0x934B58 0x07: SCMD_0x07                    panic
0x934B60 0x08: SCMD_CdReadRTC
0x934B68 0x09: SCMD_sceCdWriteRTC
0x934B70 0x0A: SCMD_sceCdReadNVM            panic
0x934B78 0x0B: SCMD_sceCdWriteNVM           panic
0x934B80 0x0C: SCMD_0x0C                    panic
0x934B88 0x0D: SCMD_0x0D                    panic
0x934B90 0x0E: SCMD_0x0E                    panic
0x934B98 0x0F: SCMD_sceCdPowerOff
0x934BA0 0x10: SCMD_0x10                    panic
0x934BA8 0x11: SCMD_0x11                    panic
0x934BB0 0x12: SCMD_sceCdReadILinkId        return zeroed iLinkId
0x934BB8 0x13: SCMD_sceCdWriteILinkID       panic
0x934BC0 0x14: SCMD_CdCtrlAudioDigitalOut   panic
0x934BC8 0x15: SCMD_sceCdForbidDVDP
0x934BD0 0x16: SCMD_AutoAdjustCtrl
0x934BD8 0x17: SCMD_CdReadModelNumber       Return SCPH-50000 (SCMD 0x03(0x00) return Mechacon version 3.9 which is wrong for that model..)
0x934BE0 0x18: SCMD_CdWriteModelNumber      panic
0x934BE8 0x19: SCMD_0x19                    panic
0x934BF0 0x1A: SCMD_sceCdBootCertify
0x934BF8 0x1B: SCMD_sceCdCancelPOffRdy
0x934C00 0x1C: SCMD_sceCdBlueLEDCtl
0x934C08 0x1D: SCMD_cdvdman_call116
0x934C10 0x1E: SCMD_sceRemote2Read
0x934C18 0x1F: SCMD_sceRemote2_7
0x934C20 0x20: SCMD_Return_0
0x934C28 0x21: SCMD_Return_0
0x934C30 0x22: SCMD_Return_0
0x934C38 0x23: SCMD_Return_0
0x934C40 0x24: SCMD_Return_0
0x934C48 0x25: SCMD_Return_0
0x934C50 0x26: SCMD_Return_0
0x934C58 0x27: SCMD_Return_0
0x934C60 0x28: SCMD_Return_0
0x934C68 0x29: SCMD_sceCdNoticeGameStart    panic
0x934C70 0x2A: SCMD_Return_0
0x934C78 0x2B: SCMD_Return_0
0x934C80 0x2C: SCMD_Return_0
0x934C88 0x2D: SCMD_Return_0
0x934C90 0x2E: SCMD_Return_0
0x934C98 0x2F: SCMD_Return_0
0x934CA0 0x30: SCMD_Return_0
0x934CA8 0x31: SCMD_Return_0
0x934CB0 0x32: SCMD_Return_0
0x934CB8 0x33: SCMD_Return_0
0x934CC0 0x34: SCMD_Return_0
0x934CC8 0x35: SCMD_Return_0
0x934CD0 0x36: SCMD_Return_0
0x934CD8 0x37: SCMD_Return_0
0x934CE0 0x38: SCMD_Return_0
0x934CE8 0x39: SCMD_Return_0
0x934CF0 0x3A: SCMD_Return_0
0x934CF8 0x3B: SCMD_Return_0
0x934D00 0x3C: SCMD_Return_0
0x934D08 0x3D: SCMD_Return_0
0x934D10 0x3E: SCMD_Return_0
0x934D18 0x3F: SCMD_Return_0
0x934D20 0x40: SCMD_CdOpenConfig
0x934D28 0x41: SCMD_CdReadConfig
0x934D30 0x42: SCMD_CdWriteConfig
0x934D38 0x43: SCMD_CdCloseConfig
0x934D40 0x44: SCMD_Return_0
0x934D48 0x45: SCMD_Return_0
0x934D50 0x46: SCMD_Return_0
0x934D58 0x47: SCMD_Return_0
0x934D60 0x48: SCMD_Return_0
0x934D68 0x49: SCMD_Return_0
0x934D70 0x4A: SCMD_Return_0
0x934D78 0x4B: SCMD_Return_0
0x934D80 0x4C: SCMD_Return_0
0x934D88 0x4D: SCMD_Return_0
0x934D90 0x4E: SCMD_Return_0
0x934D98 0x4F: SCMD_Return_0
0x934DA0 0x50: SCMD_Return_0
0x934DA8 0x51: SCMD_Return_0
0x934DB0 0x52: SCMD_Return_0
0x934DB8 0x53: SCMD_Return_0
0x934DC0 0x54: SCMD_Return_0
0x934DC8 0x55: SCMD_Return_0
0x934DD0 0x56: SCMD_Return_0
0x934DD8 0x57: SCMD_Return_0
0x934DE0 0x58: SCMD_Return_0
0x934DE8 0x59: SCMD_Return_0
0x934DF0 0x5A: SCMD_Return_0
0x934DF8 0x5B: SCMD_Return_0
0x934E00 0x5C: SCMD_Return_0
0x934E08 0x5D: SCMD_Return_0
0x934E10 0x5E: SCMD_Return_0
0x934E18 0x5F: SCMD_Return_0
0x934E20 0x60: SCMD_Return_0 
0x934E28 0x61: SCMD_Return_0
0x934E30 0x62: SCMD_Return_0
0x934E38 0x63: SCMD_Return_0
0x934E40 0x64: SCMD_Return_0
0x934E48 0x65: SCMD_Return_0
0x934E50 0x66: SCMD_Return_0
0x934E58 0x67: SCMD_Return_0
0x934E60 0x68: SCMD_Return_0
0x934E68 0x69: SCMD_Return_0
0x934E70 0x6A: SCMD_Return_0
0x934E78 0x6B: SCMD_Return_0
0x934E80 0x6C: SCMD_Return_0
0x934E88 0x6D: SCMD_Return_0
0x934E90 0x6E: SCMD_Return_0
0x934E98 0x6F: SCMD_Return_0
0x934EA0 0x70: SCMD_Return_0
0x934EA8 0x71: SCMD_Return_0
0x934EB0 0x72: SCMD_Return_0
0x934EB8 0x73: SCMD_Return_0
0x934EC0 0x74: SCMD_Return_0
0x934EC8 0x75: SCMD_Return_0
0x934ED0 0x76: SCMD_Return_0
0x934ED8 0x77: SCMD_Return_0
0x934EE0 0x78: SCMD_Return_0
0x934EE8 0x79: SCMD_Return_0
0x934EF0 0x7A: SCMD_Return_0
0x934EF8 0x7B: SCMD_Return_0
0x934F00 0x7C: SCMD_Return_0
0x934F08 0x7D: SCMD_Return_0
0x934F10 0x7E: SCMD_Return_0
0x934F18 0x7F: SCMD_Return_0
0x934F20 0x80: SCMD__mechacon_auth_0x80
0x934F28 0x81: SCMD__mechacon_auth_0x81
0x934F30 0x82: SCMD__mechacon_auth_0x82
0x934F38 0x83: SCMD__mechacon_auth_0x83
0x934F40 0x84: SCMD__mechacon_auth_0x84
0x934F48 0x85: SCMD__mechacon_auth_0x85
0x934F50 0x86: SCMD__mechacon_auth_0x86
0x934F58 0x87: SCMD__mechacon_auth_0x87
0x934F60 0x88: SCMD__mechacon_auth_0x88
0x934F68 0x89: SCMD_Return_0
0x934F70 0x8A: SCMD_Return_0
0x934F78 0x8B: SCMD_Return_0
0x934F80 0x8C: SCMD_Return_0
0x934F88 0x8D: SCMD_Return_0
0x934F90 0x8E: SCMD_Return_0
0x934F98 0x8F: SCMD__mechacon_auth_0x8F

Notes:
N commands handling differ a lot from pcsx2, doing that correctly is important for emulation.
Read model number return SCPH-50000 while returned mechacon version is (not existing?) 3.9.
This model should return Dragon mechacon rev, so 5.0 and up. 
Returned ConsoleID is 00 00 00 00 00 00 00 00 00, this can be issue in corner case where game additionally check for non zero result.
Returned iLinkID is 00 00 00 00 00 00 00 00 00, this break Time Crisis 2,3, and one of Armored Core games on pcsx2, surprisingly netemu run them fine.
Every "mechacon_auth" command return zeroed result with different size. Only exception here is 0x81 which return 1.
</pre>

==EE I/O Handlers list==
===Netemu===
4.75 and up. Mode (1 = read / 2 = write)

{| class="wikitable sortable"
!mode !! size !! PS2_HW_REG !! handler_opd 
|-
| 1 || 4 || T0_COUNT || stru_723218
|-
| 2 || 4 || T0_COUNT || stru_723290
|-
| 1 || 4 || T0_MODE || stru_723308
|-
| 2 || 4 || T0_MODE || stru_7233E0
|-
| 1 || 4 || T0_COMP || stru_7231A0
|-
| 2 || 4 || T0_COMP || stru_723248
|-
| 1 || 4 || T0_HOLD || stru_723110
|-
| 2 || 4 || T0_HOLD || stru_723128
|-
| 1 || 4 || T1_COUNT || stru_7232F0
|-
| 2 || 4 || T1_COUNT || stru_7233B0
|-
| 1 || 4 || T1_MODE || stru_723278
|-
| 2 || 4 || T1_MODE || stru_723260
|-
| 1 || 4 || T1_COMP || stru_723140
|-
| 2 || 4 || T1_COMP || stru_723380
|-
| 1 || 4 || T1_HOLD || stru_7231E8
|-
| 2 || 4 || T1_HOLD || stru_723200
|-
| 1 || 4 || T2_COUNT || stru_7232D8
|-
| 2 || 4 || T2_COUNT || stru_723398
|-
| 1 || 4 || T2_MODE || stru_723338
|-
| 2 || 4 || T2_MODE || stru_723410
|-
| 1 || 4 || T2_COMP || stru_7231D0
|-
| 2 || 4 || T2_COMP || stru_723368
|-
| 1 || 4 || T3_COUNT || stru_7232C0
|-
| 2 || 4 || T3_COUNT || stru_7233C8
|-
| 1 || 4 || T3_MODE || stru_723320
|-
| 2 || 4 || T3_MODE || stru_7233F8
|-
| 1 || 4 || T3_COMP || stru_7231B8
|-
| 2 || 4 || T3_COMP || stru_723350
|-
| 1 || 8 || IPU_CMD || stru_721910
|-
| 2 || 8 || IPU_CMD || stru_7218F8
|-
| 1 || 4 || IPU_CTRL || stru_721970
|-
| 2 || 4 || IPU_CTRL || stru_721958
|-
| 1 || 4 || IPU_BP || stru_721940
|-
| 1 || 8 || IPU_TOP || stru_721928
|-
| 2 || 4 || GIF_CTRL || stru_7220C0
|-
| 2 || 4 || GIF_MODE || stru_7220A8
|-
| 1 || 4 || GIF_STAT || stru_722000
|-
| 1 || 4 || GIF_TAG0 || stru_721EB0
|-
| 1 || 4 || GIF_TAG1 || stru_721FE8
|-
| 1 || 4 || GIF_TAG2 || stru_721FD0
|-
| 1 || 4 || GIF_TAG3 || stru_721FB8
|-
| 1 || 4 || GIF_CNT || stru_721EC8
|-
| 1 || 4 || GIF_P3CNT || stru_721EE0
|-
| 1 || 4 || GIF_P3TAG || stru_721EF8
|-
| 1 || 4 || VIF0_STAT || stru_721820
|-
| 2 || 4 || VIF0_FBRST || stru_721868
|-
| 1 || 4 || VIF0_ERR || stru_7217A8
|-
| 2 || 4 || VIF0_ERR || stru_721598
|-
| 1 || 4 || VIF0_MARK || stru_721790
|-
| 2 || 4 || VIF0_MARK || stru_7215B0
|-
| 1 || 4 || VIF0_CYCLE || stru_721778
|-
| 1 || 4 || VIF0_MODE || stru_721760
|-
| 1 || 4 || VIF0_NUM || stru_721748
|-
| 1 || 4 || VIF0_MASK || stru_721730
|-
| 1 || 4 || VIF0_CODE || stru_721718
|-
| 1 || 4 || VIF0_ITOPS || stru_721700
|-
| 1 || 4 || VIF0_ITOP || stru_7216E8
|-
| 1 || 4 || VIF0_R0 || stru_7216D0
|-
| 1 || 4 || VIF0_R1 || stru_7216B8
|-
| 1 || 4 || VIF0_R2 || stru_7216A0
|-
| 1 || 4 || VIF0_R3 || stru_721688
|-
| 1 || 4 || VIF0_C0 || stru_721670
|-
| 1 || 4 || VIF0_C1 || stru_721658
|-
| 1 || 4 || VIF0_C2 || stru_721640
|-
| 1 || 4 || VIF0_C3 || stru_721628
|-
| 1 || 4 || VIF1_STAT || stru_722960
|-
| 2 || 4 || VIF1_STAT || stru_722618
|-
| 2 || 4 || VIF1_FBRST || stru_722A98
|-
| 1 || 4 || VIF1_ERR || stru_722948
|-
| 2 || 4 || VIF1_ERR || stru_722630
|-
| 1 || 4 || VIF1_MARK || stru_722930
|-
| 2 || 4 || VIF1_MARK || stru_722648
|-
| 1 || 4 || VIF1_CYCLE || stru_722918
|-
| 1 || 4 || VIF1_MODE || stru_722900
|-
| 1 || 4 || VIF1_NUM || stru_7228E8
|-
| 1 || 4 || VIF1_MASK || stru_7228D0
|-
| 1 || 4 || VIF1_CODE || stru_7228B8
|-
| 1 || 4 || VIF1_ITOPS || stru_7228A0
|-
| 1 || 4 || VIF1_BASE || stru_722888
|-
| 1 || 4 || VIF1_OFST || stru_722870
|-
| 1 || 4 || VIF1_TOPS || stru_722858
|-
| 1 || 4 || VIF1_ITOP || stru_722840
|-
| 1 || 4 || VIF1_TOP || stru_722828
|-
| 1 || 4 || VIF1_R0 || stru_722810
|-
| 1 || 4 || VIF1_R1 || stru_7227F8
|-
| 1 || 4 || VIF1_R2 || stru_7227E0
|-
| 1 || 4 || VIF1_R3 || stru_7227C8
|-
| 1 || 4 || VIF1_C0 || stru_7227B0
|-
| 1 || 4 || VIF1_C1 || stru_722798
|-
| 1 || 4 || VIF1_C2 || stru_722780
|-
| 1 || 4 || VIF1_C3 || stru_722768
|-
| 2 || 0x10 || VIF0_FIFO || stru_721850
|-
| 1 || 0x10 || VIF1_FIFO || stru_722678
|-
| 2 || 0x10 || VIF1_FIFO || stru_722AB0
|-
| 2 || 0x10 || GIF_FIFO || stru_722B40
|-
| 1 || 0x10 || IPU_Out_FIFO || stru_7238A8
|-
| 2 || 0x10 || IPU_In_FIFO || stru_723890
|-
| 1 || 4 || D0_CHCR || stru_721610
|-
| 2 || 4 || D0_CHCR || stru_721880
|-
| 1 || 4 || D0_MADR || stru_721508
|-
| 2 || 4 || D0_MADR || stru_721520
|-
| 1 || 4 || D0_QWC || stru_721808
|-
| 2 || 4 || D0_QWC || stru_721538
|-
| 1 || 4 || D0_TADR || stru_7217F0
|-
| 2 || 4 || D0_TADR || stru_721550
|-
| 1 || 4 || D0_ASR0 || stru_7217D8
|-
| 2 || 4 || D0_ASR0 || stru_721568
|-
| 1 || 4 || D0_ASR1 || stru_7217C0
|-
| 2 || 4 || D0_ASR1 || stru_721580
|-
| 1 || 4 || D1_CHCR || stru_722690
|-
| 2 || 4 || D1_CHCR || stru_722A68
|-
| 1 || 4 || D1_MADR || stru_722A50
|-
| 2 || 4 || D1_MADR || stru_722750
|-
| 1 || 4 || D1_QWC || stru_722A38
|-
| 2 || 4 || D1_QWC || stru_722738
|-
| 1 || 4 || D1_TADR || stru_722A20
|-
| 2 || 4 || D1_TADR || stru_722720
|-
| 1 || 4 || D1_ASR0 || stru_722A08
|-
| 2 || 4 || D1_ASR0 || stru_722708
|-
| 1 || 4 || D1_ASR1 || stru_7229F0
|-
| 2 || 4 || D1_ASR1 || stru_7226F0
|-
| 1 || 4 || D2_CHCR || stru_722B28
|-
| 2 || 4 || D2_CHCR || stru_722B58
|-
| 1 || 4 || D2_MADR || stru_7229D8
|-
| 2 || 4 || D2_MADR || stru_722AE0
|-
| 1 || 4 || D2_QWC || stru_7229C0
|-
| 2 || 4 || D2_QWC || stru_722AC8
|-
| 1 || 4 || D2_TADR || stru_7229A8
|-
| 2 || 4 || D2_TADR || stru_722AF8
|-
| 1 || 4 || D2_ASR0 || stru_722990
|-
| 2 || 4 || D2_ASR0 || stru_7226D8
|-
| 1 || 4 || D2_ASR1 || stru_722978
|-
| 2 || 4 || D2_ASR1 || stru_7226C0
|-
| 1 || 4 || D3_CHCR || stru_723740
|-
| 2 || 4 || D3_CHCR || stru_723800
|-
| 1 || 4 || D3_MADR || stru_7237D0
|-
| 2 || 4 || D3_MADR || stru_723878
|-
| 1 || 4 || D3_QWC || stru_7237B8
|-
| 2 || 4 || D3_QWC || stru_723860
|-
| 1 || 4 || D4_CHCR || stru_7237A0
|-
| 2 || 4 || D4_CHCR || stru_7237E8
|-
| 1 || 4 || D4_MADR || stru_723788
|-
| 2 || 4 || D4_MADR || stru_723848
|-
| 1 || 4 || D4_QWC || stru_723770
|-
| 2 || 4 || D4_QWC || stru_723830
|-
| 1 || 4 || D4_TADR || stru_723758
|-
| 2 || 4 || D4_TADR || stru_723818
|-
| 1 || 4 || D5_CHCR || stru_722498
|-
| 2 || 4 || D5_CHCR || stru_7224C8
|-
| 1 || 4 || D5_MADR || stru_722408
|-
| 2 || 4 || D5_MADR || stru_722390
|-
| 1 || 4 || D5_QWC || stru_722468
|-
| 2 || 4 || D5_QWC || stru_7223F0
|-
| 1 || 4 || D6_CHCR || stru_722480
|-
| 2 || 4 || D6_CHCR || stru_7224B0
|-
| 1 || 4 || D6_MADR || stru_722450
|-
| 2 || 4 || D6_MADR || stru_7223D8
|-
| 1 || 4 || D6_QWC || stru_722420
|-
| 2 || 4 || D6_QWC || stru_7223A8
|-
| 1 || 4 || unk_1000C430 || stru_722438
|-
| 2 || 4 || unk_1000C430 || stru_7223C0
|-
| 1 || 4 || D7_CHCR || stru_7235C0
|-
| 2 || 4 || D7_CHCR || stru_723530
|-
| 1 || 4 || D7_MADR || stru_7235A8
|-
| 2 || 4 || D7_MADR || stru_723500
|-
| 1 || 4 || D7_QWC || stru_723590
|-
| 2 || 4 || D7_QWC || stru_723518
|-
| 1 || 4 || D8_CHCR || stru_7222D0
|-
| 2 || 4 || D8_CHCR || stru_7222E8
|-
| 1 || 4 || D8_MADR || stru_7222B8
|-
| 2 || 4 || D8_MADR || stru_722168
|-
| 1 || 4 || D8_QWC || stru_7222A0
|-
| 2 || 4 || D8_QWC || stru_722180
|-
| 1 || 4 || D8_SADR || stru_722288
|-
| 2 || 4 || D8_SADR || stru_722198
|-
| 1 || 4 || D9_CHCR || stru_722270
|-
| 2 || 4 || D9_CHCR || stru_722318
|-
| 1 || 4 || D9_MADR || stru_722258
|-
| 2 || 4 || D9_MADR || stru_7221F8
|-
| 1 || 4 || D9_QWC || stru_722240
|-
| 2 || 4 || D9_QWC || stru_7221B0
|-
| 1 || 4 || D9_TADR || stru_722228
|-
| 2 || 4 || D9_TADR || stru_7221E0
|-
| 1 || 4 || D9_SADR || stru_722210
|-
| 2 || 4 || D9_SADR || stru_7221C8
|-
| 1 || 4 || D_CTRL || stru_721C28
|-
| 2 || 4 || D_CTRL || stru_721C70
|-
| 1 || 4 || D_STAT || stru_724130
|-
| 2 || 4 || D_STAT || stru_7241A8
|-
| 1 || 4 || D_PCR || stru_724100
|-
| 2 || 4 || D_PCR || stru_7240E8
|-
| 1 || 4 || D_SQWC || stru_722138
|-
| 2 || 4 || D_SQWC || stru_722150
|-
| 1 || 4 || D_RBSR || stru_721BF8
|-
| 2 || 4 || D_RBSR || stru_721B68
|-
| 1 || 4 || D_RBOR || stru_721B80
|-
| 2 || 4 || D_RBOR || stru_721B98
|-
| 1 || 4 || D_STADR || stru_721C40
|-
| 2 || 4 || D_STADR || stru_721BB0
|-
| 1 || 4 || INTC_STAT || stru_724148
|-
| 2 || 4 || INTC_STAT || stru_7241C0
|-
| 1 || 4 || INTC_MASK || stru_724118
|-
| 2 || 4 || INTC_MASK || stru_724160
|-
| 2 || 4 || KPUTCHAR || stru_723B30
|-
| 1 || 4 || MSCOM || stru_723578
|-
| 2 || 4 || MSCOM || stru_723548
|-
| 1 || 4 || SMCOM || stru_723560
|-
| 1 || 4 || MSFLAG || stru_723620
|-
| 2 || 4 || MSFLAG || stru_723680
|-
| 1 || 4 || SMFLAG || stru_723608
|-
| 2 || 4 || SMFLAG || stru_723668
|-
| 1 || 4 || SIF_CR || stru_7235F0
|-
| 2 || 4 || SIF_CR || stru_723650
|-
| 1 || 4 || unk_1000F260 || stru_7235D8
|-
| 2 || 4 || unk_1000F260 || stru_723638
|-
| 1 || 4 || unk_1000F280 || stru_723428
|-
| 2 || 4 || unk_1000F280 || stru_723440
|-
| 1 || 4 || unk_1000F290 || stru_723458
|-
| 1 || 4 || unk_1000F2A0 || stru_723470
|-
| 2 || 4 || unk_1000F2A0 || stru_723488
|-
| 1 || 4 || unk_1000F2B0 || stru_7234A0
|-
| 2 || 4 || unk_1000F2B0 || stru_7234B8
|-
| 1 || 4 || unk_1000F2C0 || stru_7234D0
|-
| 2 || 4 || unk_1000F2C0 || stru_7234E8
|-
| 1 || 4 || D_ENABLER || stru_721C10
|-
| 2 || 4 || D_ENABLEW || stru_721C58
|-
| 1 || 8 || unk_1000F800 || stru_7250C0
|-
| 2 || 8 || unk_1000F800 || stru_7250D8
|-
| 1 || 8 || unk_1000F810 || stru_725150
|-
| 1 || 0x10 || unk_1000F820 || stru_7250F0
|-
| 1 || 0x10 || unk_1000F830 || stru_725108
|-
| 1 || 4 || unk_1000F860 || stru_725120
|-
| 1 || 4 || unk_1000F880 || stru_725138
|-
| 1 || 4 || unk_1000F8B0 || stru_725168
|-
| 2 || 8 || PMODE || stru_721E20
|-
| 2 || 8 || SMODE1 || stru_722060
|-
| 2 || 8 || SMODE2 || stru_721F88
|-
| 2 || 8 || SRFSH || stru_721E38
|-
| 2 || 8 || SYNCH1 || stru_721F70
|-
| 2 || 8 || SYNCH2 || stru_721F58
|-
| 2 || 8 || SYNCV || stru_721F40
|-
| 2 || 8 || DISPFB1 || stru_7220F0
|-
| 2 || 8 || DISPLAY1 || stru_722018
|-
| 2 || 8 || DISPFB2 || stru_7220D8
|-
| 2 || 8 || DISPLAY2 || stru_722078
|-
| 2 || 8 || EXTBUF || stru_721E50
|-
| 2 || 8 || EXTDATA || stru_721E68
|-
| 2 || 8 || EXTWRITE || stru_721E80
|-
| 2 || 8 || BGCOLOR || stru_721E98
|-
| 1 || 8 || GS_CSR || stru_722090
|-
| 2 || 8 || GS_CSR || stru_722120
|-
| 2 || 8 || GS_IMR || stru_722108
|-
| 2 || 8 || BUSDIR || stru_721FA0
|-
| 1 || 8 || SIGLBLID || stru_722030
|-
| 2 || 8 || SIGLBLID || stru_722048
|-
|}
1000F800 to 1000F8B0 seems to be some fake regs for testing purposes. Probably not existing on real PS2. 
* 1000F820 return "DrJock TV Quiz P"
* 1000F830 return "hD bags few lynx"
That make string "DrJock TV Quiz PhD bags few lynx" - This is perfect summary of Sony work. Since correct pangram should use "MrJock". So even here they made mistake. 
* 1F00F880 return hardcoded value of 0x4457, which match emu revision i'm working on. Can be just coincidence.

==Random notes about SPE in ps2_netemu==

===IOP SPE===
This is unconfirmed by any code reversing for now, but IOP emulator print messages like: 
 Cache write (IOPADDR/LSADDR/SIZE)
 Cache read  (IOPADDR/LSADDR/SIZE)
 ERROR: Double ICACHE fault
Which suggest that instruction cache is emulated for IOP. Making this (ps2/gx/net) emu only PS2 emulator that support cache emulation for IOP. For now even most ps1 emulators lack of that feature, and none of known PS2 emulators do that (including Pcsx2/Play!/Dobiestation). With this we can safely assume that also load delay slots are handled correctly here. Unrelated, but is hard to believe that someone implemented icache, but not load delay slots. Which again make it only known emu set that support this afaik. 

===EEDMA on SPE3===
That one is one of most misleading names in whole emulator.. <br>
DMA channels are handled in:
*0 - VIF0 on PPU only
*1 - VIF1 dma, and VIF1 hw reads/writes including fifo write are handled in SPE3 (EEDMA)
*2 - GIF dma handled in SPE3 (EEDMA) incl. fifo write, but most HW reads is not handled here
*3 - IPUfrom dma, and whole ipu HW r/w is handled by SPE6
*4 - IPUto dma, and whole ipu HW r/w is handled by SPE6
*5 - SIF0 dma is handled in PPE, and SPE 0 (IOP)
*6 - SIF1 dma is handled in PPE, and SPE 0 (IOP)
*7 - SIF2 dma is handled in PPE, and SPE 0 (IOP)
*8 - SPRfrom dma is handled on PPE only it seems
*9 - SPRto dma is handled on PPE only it seems
Additionally EEDMA handle VU1 code writes/reads. Only VU1 code, VU1 data is handled by SPE2 (VU1), and any VU0 r/w is handled by PPU only.<br>
So is more like "Close to GS" DMA handler.

"EEDMA" is also responsible for handling VIF1 commands, including UNPACKs. In SPE memory structure responsible for that is starting at 0x1910 (0x00), and last entry (0x7F command) is at 0x9810. This make 100 bytes per "slot" for command information, like pointers to registers, masks for unpacks, pointers to function responsible for commands handling, etc. (more info about VIF cmds: https://psi-rockin.github.io/ps2tek/#vifcommands)

===VU1 emulation on SPE===
When I disassembled VU1 SPE program, i noticed that real code is really small part of that. Not much to run real VU recompiler/interpreter.
Then i found out something impressive in my opinion. Real deal is that real code delivered to SPE is created on PPE dynamically based on real PS2 VU1 code. Due to similarity of SPE with VU requested in IBM by Sony at design level, there is no VU1 interpreter or recompiler per se. Emulator take VU1 code, dismount it to parts by OP field types, and reassemble into ready SPE code using ready hex templates. I'm not familiar with professional naming of that operation, but its like ahead of time translation of code. So when VU1 code reach SPE is already translated to SPE opcodes. In other terms, SPE responsible for running VU1 is really running VU1 code in some way.

In latest ps2_netemu function responsible for translating VU1 code into SPE ready code is located at 0x13C69C

===IPU skip mpeg hack===
There are some leftovers of SKIP MPEG hack in SPE 6 (IPU), i'm not sure that is still available.
Looking at cmd 0x1A there is small chance that is mentioned hack, but i can't confirm yet.

===SPE4 and SPE5===
And SPE7, because someone there forgot it doesn't work in retail. :P First thing is that emulator do a lot of setup for SPE7, including creating virtual address to access it (0x40380000 - 0x403BFFFF). Only thing that seems to be missing is actually starting that SPE.

SPE4 (FE) have a lot of PS2 GIF related code, GS downloads function in PPE check something there (BUSY? BUSDIR? DL ready? bit), and if that bit is not 1 loop for 1000000 x 4 cycles and check again. That spe is also place where GIF_TAG# can be read, so last processed tag on GIF unit. That was greatest hint to be honest, there is no reason to send it there if is not processed there. This is also where 0x49 and 0x4D config commands go. And surprisingly they are not really related. But fact is they go thru same parser on SPE side. 11, and 12 from those commands are subcommand on SPE side. 11 take no args that's why 0x49 send 11,0,0. 12 take 1 arg, and that's why 0x4D send 12, param, 0.<br>
SPE5 (BE), well i didn't reversed that one too much. But it seems to have relation with "FE", and with RSX. This is only speculation but it seems that FE and BE are FrontEnd and BackEnd for GIF/GS emulation tandem. My first idea was BlendingEngine, but that doesn't seems to be the case. Well those 2 need more work.

==SCANMSK on ps2_netemu==
Apparently SCANMSK is not really ignored, GIF process it, update, etc. So is rather not implemented in later parts of code (GS emulation), or this is some other bug. I guess this GIF code is shared with ps2_gxemu, so maybe it is really missing processing on software GS emulation in later stages.
 0xD34C     hbrr     loc_D38C, Update_7E98
 0xD350     lr       r4, r80
 0xD354     lqr      r9, SCANMSK_REG
 0xD358     il       r3, 0x22 ; GIF_REG_NR
 0xD35C     shlqbyi  r5, r80, 4
 0xD360     cwd      r6, 0x30+var_30+0xC(sp)
 0xD364     andi     r5, r5, 3 ;        New SCANMSK write
 0xD368     rotqbyi  r8, r9, 0xC
 0xD36C     ceq      r7, r8, r5
 0xD370     brnz     r7, return_D390 ;  branch if old SCANMSK == new
 0xD374     lqr      r11, SCANMSK_REG
 0xD378     lqd      lr, 0x30+link_reg(sp)
 0xD37C     ai       sp, sp, 0x30
 0xD380     lqd      r80, var_10(sp)
 0xD384     shufb    r10, r5, r11, r6
 0xD388     stqr     r10, SCANMSK_REG
 
 0xD38C     br       UpdateGS_7E98

==PS2 masterlist with ps2 emu hashes==
*See: [[PS2_Emulation/PS2_Games_Masterlist]]

== ps2_netemu supported video modes ==

0x53 video mode (576p) seems to work right. Both HDTV modes (0x51 1080i and 0x52 720p) crash the emulator. Tested by forcing the values in the sceGsResetGraph function.

=== Widescreen support ===
If the game does retrieve the widescreen flag from the GetOSDConfigParam through the scescfGetAspect function, the results are as follows:
* Upscaler turned off: widescreen flag set by BIOS,
* Upscaler turned on - Normal setting (keep original aspect ratio): no flag is set,
* Upscaler turned on - Full screen setting: widescreen flag set by BIOS.
Assuming the PS3 is connected with the HDMI cable and all HD resolutions are ticked in settings. Probably the widescreen support with the upscaler turned off is dependent on the connection and the PS3 resolution settings.

== Emu Patches ==

===Skip demo disc check===

Sony is blocking every game which id from SYSTEM.CNF starts with S, and 4th character is D (SLED, SCED, etc.). When demo is detected sys_stat is set to error code, and emulator return to XMB. Patches here remove that restriction. Apparently ps2_emu don't have that check, probably because there was no need for it (compatibility reasons i guess). 

ps2_netemu: 
 search for
 41 9E 03 50 39 80 00 00 54 00 06 3E 54 69 38 30
 
 replace to 
 60 00 00 00 39 80 00 00 54 00 06 3E 54 69 38 30
 
 in 4.75+ emu: 0x13356C  beq  cr7, demo_check  ---> nop
 
ps2_gxemu
 search for
 41 9E 04 50 78 E0 FE A2 78 C9 F6 E2 54 C6 30 32
 
 replace to
 60 00 00 00 78 E0 FE A2 78 C9 F6 E2 54 C6 30 32
 
 in 4.75+ emu: 0x8EEA0  beq  cr7, demo_check  ---> nop