Editing PS1 Emulation

== Description ==
Note: there are no PS1 emulators available in early Tool/DECR and Debug/DEX firmwares (does not have dev_flash/ps1emu or ps2emu folder. dev_flash/vsh/etc/version.txt & index.dat say: ¨ps1emu:NA@NA: ps2emu:NA@NA: ps2gxemu:NA@NA: emerald:NA@NA: bdp:NA@NA:¨).

{{Boxframe1|content='''Firmware changes related with PS1 emulation'''
*Firmware [[1.02_CEX|1.02]]:
**Added '''ps1_emu.self'''

*Firmware [[1.70_CEX|1.70]]:
**Added '''ps1_netemu.self'''
**Added the ability to play original PlayStation format games downloaded from the PlayStation Store.
**Added rumble functionality for USB accessories which support it when playing PS2 games.
**Saved data from PlayStation format software now usable on both PSP and PS3 systems.
**Backwards compatibility for PS1 and PS2 games was improved.

*Firmware [[1.80_CEX|1.80]]:
**Ability to upscale PS1 and PS2 games
**Ability to copy PS1/PS2 game saves from PS3 to Memory Cards using a Memory Card adapter.
**Backwards compatibility for PS1 and PS2 games was improved.

*Firmware [[2.10_CEX|2.10]]:
**Added '''ps1_newemu.self''' and '''ps1_rom.bin''' (CRC32:D5FF6273 / CRC16:111D file is same as in 4.11 and all versions in between)
**Users can now play PS1 game discs on a PSP with remote play, PSP firmware version 3.50 or newer is required. (this feature was not announced).
**Backwards compatibility for PS1 and PS2 games was improved (Update was also unannounced but evident in Sony's backwards compatibility search site).
**Note: since 2.10++ all PS1 emulators, ps1_emu.self, ps1_netemu.self, ps1_newemu.self uses the since then added ps1_rom.bin bios file.
}}

== Files ==

=== Emulator versions ===
This needs a table with emulator versions "by firmware" with the firmware versions at table headers and checksums inside cells, something like this:

{| class="wikitable" style="font-size:small;"
|+PS1 Emulator versions
! rowspan="2" | File Name !! colspan="6" | Firmware !! rowspan="2" | Notes
|-
! [[1.00_CEX|1.00]] !! [[1.02_CEX|1.02]]~[[1.70_CEX|1.70]] !! [[1.70_CEX|1.70]]~[[1.80_CEX|1.80]] !! [[1.80_CEX|1.80]]~[[2.10_CEX|2.10]] !! [[2.10_CEX|2.10]]~[[4.81_CEX|4.81]] !! [[4.81_CEX|4.81]]
|-
! ps1_emu.self
| ? || MD5: ? || MD5: ? || MD5: ? || MD5: ? || MD5: ? || 
|-
! ps1_netemu.self
| colspan="2" {{no}} || MD5: ? || MD5: ? || MD5: ? || MD5: ? || 
|-
! ps1_newemu.self
| colspan="4" {{no}} || MD5: ? || MD5: ?
|-
! ps1_rom.bin
| colspan="4" {{no}} || MD5: ? || MD5: ? || 
|}

=== Game formats ===
See: [[PSISOIMG0000]] and [[Iso.bin.edat]]

=== Savegames ===
*Location: /dev_hdd0/savedata/vmc
Note: capitalisation of filename is important: name it xxx.VM1 instead of xxxx.vm1 (e.g. Internal Memory Card.VM1 for PSX/PSone, Internal Memory Card.VM2 for PS2/PStwo)

The .VMx files appear to be raw memory card data:
* [[Game_Saves#Virtual_Memory_Card_PS1_.28.VM1.29 | .VM1 Playstation 1 Memory cards]] can be edited by [http://www.psdevwiki.com/files/devtools/MemcardRex/ MemcardRex] [[http://www.mediafire.com/?wf82vc4oeb932w3 MemcardRex v1.5]]
* [[Game_Saves#Virtual_Memory_Card_PS2_.28.VM2.29 | .VM2 Playstation 2 Memory cards]] can be edited by [http://www.psdevwiki.com/files/devtools/mymc/ mymc] [[http://www.csclub.uwaterloo.ca:11068/mymc/ mymc]]

== Arguments ==

=== ps1_emu.self ===

{| class="wikitable"
|+ps1_emu.self arguments
! 7 arguments !! Name !! Example !! Notes
|-
| argv[0] || self starting location || dev_flash/ps1emu/ps1_emu.self ||
|-
| argv[1] || VM1-1 location || dev_hdd0/savedata/vmc/filename1.VM1 ||
|-
| argv[2] || VM1-2 location || dev_hdd0/savedata/vmc/filename2.VM1 ||
|-
| argv[3] || Regionnumber/TargetID || 0082 ||
|-
| argv[4] || unknown || 1200 || <!-- Screen Resolution... related ? -->
|-
| argv[5] || unknown || 1 || Screen Upscaler ? (full/normal/off = 2/1/0)
|-
| argv[6] || unknown || 0 || Screen Smoothing ? (on/off = 1/0)
|-
|}

=== ps1_netemu.self ===

{| class="wikitable"
|+ps1_netemu.self arguments
! 7 arguments !! Name !! Example !! Notes
|-
| argv[0] || self starting location || dev_flash/ps1emu/ps1_netemu.self ||
|-
| argv[1] || ISO.BIN.EDAT location || ||
|-
| argv[2] || unknown || ||
|-
| argv[3] || unknown || ||
|-
| argv[4] || unknown || ||
|-
| argv[5] || unknown || ||
|-
| argv[6] || unknown || ||
|-
|}

=== ps1_newemu.self ===

{| class="wikitable"
|+ps1_newemu.self arguments
! 9 arguments !! Name !! Example !! Notes
|-
| argv[0] || self starting location || dev_flash/ps1emu/ps1_newemu.self ||
|-
| argv[1] || VM1-1 location || dev_hdd0/savedata/vmc/filename1.VM1 ||
|-
| argv[2] || VM1-2 location || dev_hdd0/savedata/vmc/filename2.VM1 ||
|-
| argv[3] || Regionnumber/TargetID || 0082 ||
|-
| argv[4] || unknown || 600 ||
|-
| argv[5] || unknown || null/empty ||
|-
| argv[6] || unknown || 1 ||
|-
| argv[7] || unknown || 2 ||
|-
| argv[8] || unknown || 2 ||
|-
|}

==Game settings==

===Game settings hardcoded in PS1 emulators===
http://www.ps3hax.net/showpost.php?p=261592&postcount=1264

{{spoiler|TitleID settings hardcoded in ps1_emu.self|{{TitleID settings hardcoded in ps1_emu.self}}}}
{{spoiler|TitleID settings hardcoded in ps1_netemu.self|{{TitleID settings hardcoded in ps1_netemu.self}}}}
{{spoiler|TitleID settings hardcoded in ps1_newemu.self|{{TitleID settings hardcoded in ps1_newemu.self}}}}

=== CONFIG ===

Created by the Emulator at path: /USRDIR/CONFIG

Content: 
<pre>
00000000 1C 00 00 00 50 53 31 45 6D 75 43 6F 6E 66 69 67 ....PS1EmuConfig
00000010 46 69 6C 65 00 97 0A 54 04 00 00 00 01 00 00 00 File...T........
00000020 0F D4 CC B9 10 00 00 00 64 69 73 63 5F 6E 6F 00 ........disc_no.
00000030 04 00 00 00 00 00 00 00 93 D1 5B F8             ..........[.    
</pre>


{| class="wikitable"
|-
! Offset !! size !! data !! notes
|-
| 0x00 || 0x04 || 1C 00 00 00 || size of content
|-
| 0x04 || 0x14 || "PS1EmuConfigFile" ||
|-
| 0x18 || 0x04 || 00 97 0A 54 ||
|-
| 0x1C || 0x04 || 01 00 00 00 ||
|-
| 0x20 || 0x04 || 0F D4 CC B9 || crc
|-
| 0x24 || 0x04 || 10 00 00 00 || size of content
|-
| 0x28 || 0x08 || "disc_no" ||
|-
| 0x30 || 0x04 || 04 00 00 00 || amount of discs
|-
| 0x34 || 0x04 || 00 00 00 00 || disc number
|-
| 0x38 || 0x04 || 93 D1 5B F8 || crc
|-
|}

==PS1 games management in multiman==
=== Manual starting SELF method ===
#Insert PSX/PSone disc (region/pressed doesn't matter)
#Start MultiMAN (e.g. 2.07.01++)
::*Since 02.07.05 the PSX and PS2 discs are properly detected. PSX discs will show in XMB Game Column and you can launch the PS1 game from there. It uses ps1_emu.self default (you can choose Load or Load (Net), latter uses ps1_netemu).
#Switch to filemanager mode
#Browse to /dev_flash/ps1emu
#Select either one of the ps1 emulation SELF files

Note: Some games run better with ps1_emu.self (e.g. Motal Kombat) while others run better with ps1_netemu.self (e.g. Resident Evil 3). If it doesn't work, try another ps1 emulation SELF file.

Downside: memory card options are unavailable unless you created a Virtual Memorycard ''before'' starting MultiMAN (XMB::Category Game:: Memory Card Utility (PS/PS2) > Create a PS1 memory card. Set it to Slot 1 (Press Triangle while selecting the Memory Card, then Assign it). Note: naming it "Internal Memory Card" sometimes works better than other names. MultiMAN 02.07.07 seems to solve the savegame issues.

=== Changes in MultiMAN 2.07.00/01 for ps1_emu handling ===
These options where needed to make above work:
* Added: LV2 access rights to use LV1 Storage Manager (syscall 864)
* Added: LV1 patch for user access to sys_storage functions (syscalls 600 to 623)

=== Arguments handling===
From multiman.cpp source (line 2502) http://code.google.com/p/multiman/source/browse/source/multiman.cpp?r=8c5b662f1c54d4f95f646949cae3d033b15b1a2e
{{Boxcode|content=<syntaxhighlight lang="c">
{
	char* launchargv[9];
	memset(launchargv, 0, sizeof(launchargv));
	launchargv[0] = (char*)malloc(strlen(mc1)+1); strcpy(launchargv[0], mc1);
	launchargv[1] = (char*)malloc(strlen(mc2)+1); strcpy(launchargv[1], mc2);
	launchargv[2] = (char*)malloc( 5); strcpy(launchargv[2], "0082");
	launchargv[3] = (char*)malloc( 5); strcpy(launchargv[3], "1600");
	launchargv[4] = (char*)malloc(10); strcpy(launchargv[4], app_path);
	launchargv[5] = (char*)malloc( 2); strcpy(launchargv[5], "1");
	launchargv[6] = (char*)malloc( 2); strcpy(launchargv[6], "2");		// full screen	on/off	= 2/1
	launchargv[7] = (char*)malloc( 2); strcpy(launchargv[7], "1");		// smoothing	on/off	= 1/0
	launchargv[8] = NULL;
	unload_modules();
	exitspawn((const char*) "/dev_flash/ps1emu/ps1_netemu.self", (char* const*)launchargv, NULL, NULL, 0, 1001, SYS_PROCESS_PRIMARY_STACK_SIZE_1M);
}

{
	char* launchargv[7];
	memset(launchargv, 0, sizeof(launchargv));
	launchargv[0] = (char*)malloc(strlen(mc1)+1); strcpy(launchargv[0], mc1);
	launchargv[1] = (char*)malloc(strlen(mc2)+1); strcpy(launchargv[1], mc2);
	launchargv[2] = (char*)malloc( 5); strcpy(launchargv[2], "0082");	// region
	launchargv[3] = (char*)malloc( 5); strcpy(launchargv[3], "1200");
	launchargv[4] = (char*)malloc( 2); strcpy(launchargv[4], "1");		// full screen	on/off	= 2/1
	launchargv[5] = (char*)malloc( 2); strcpy(launchargv[5], "1");		// smoothing	on/off	= 1/0
	launchargv[6] = NULL;
	unload_modules();
	exitspawn((const char*) "/dev_flash/ps1emu/ps1_emu.self", (char* const*)launchargv, NULL, NULL, 0, 1001, SYS_PROCESS_PRIMARY_STACK_SIZE_1M);
}
</syntaxhighlight>}}
*Notes:
**The '''''full screen''''' commented argument seems to be the '''Upscaler''' setting available from XMB {{icon category settings}} ⇨ '''[Game Settings]''' ⇨ '''[PS/PS2 Upscaler]''', with values: '''full/normal/off = 2/1/0'''
{{Reverse engineering}}<noinclude>[[Category:Main]]</noinclude>