CSO Shutoff From Memory stick

[PSPGOENTHUSIAST]

PSP/Vita Model

PSP-N1000 (PSP Go)

ARK Version

4.20.65 r3

Homebrew/GAME (if applicable)

All CSO Games from Memory Stick

Plugins ( if applicable )

xmb, ef0:/seplugins/CXMB/CXMB.PRX, on

game, ef0:/seplugins/CWCHEAT/cwcheat.prx, on

ps1, ef0:/seplugins/CWCHEAT/cwcheatpops.prx, on

game, ef0:/seplugins/nploader.prx, off

ps1, ef0:/seplugins/cdda_enabler.prx, on

ULUS10160, ef0:/seplugins/CWCHEAT/cwcheat.prx, off

ULUS10160, ef0:/seplugins/cheatdevice_remastered.prx, on

always, ef0:/seplugins/brightness.prx, on

xmb, ef0:/seplugins/category_lite.prx, on

Steps to reproduce

Attemping to launch any CSO formatted game stored on my memory stick from either the xmb or the custom launcher results in my PSP go shutting off.

Extra details: Homebrew, iso files and PS1 eboots still launch and work from memory stick. The CSO games do work from memory stick when being ran under lme 2.3 CFW with the same plugin setup. CSO files were compressed using umdgen with compression level 9 selected.

USB Charge

Disabled

Overclock

Disabled

Power Save

Disabled

Balanced Energy Mode

Disabled

Autoboot Launcher

Off

Disable PSP Go Pause

Off

Unlock Extra Memory

Disabled

Memory Stick Speedup

Alway

Inferno Cache

Off

Skip Sony Logos

Off

Hide PIC0 and PIC1

Off

Hide MAC Address

Off

Hide DLC

Off

Turn off LEDs

Disabled

[JoseAaronLopezGarcia]

Unfortunately I can't seem to be able to reproduce this. Do you know the exact release that broke it?

[PSPGOENTHUSIAST]

It hasn't ever worked for the past few days and even after a few updates still nothing. One thing I forgot to mention is that I am using an internal 128gb SD to memory stick adapter. It was formatted to fat32 using my computer before being used on the PSP. If all else fails, I could get them all as iso files

[JoseAaronLopezGarcia]

It only affects CSO? ISO works fine?

[PSPGOENTHUSIAST]

Yes only CSO. Although the ISO loads slow but that's probably due to the 128gb size

[JoseAaronLopezGarcia]

If the ISO loads slow then that might explain why CSO outright crashes. Might have to look into why it is slow.

Was the memory stick formatted using the PSP's own format utility? Perhaps the SD card is too fragmented? Maybe the PSP doesn't do well with large SD cards, maybe the adapter has gone faulty.

There's so many things that could have gone wrong. You need to try to diagnose it to rule out potential issues.

[PSPGOENTHUSIAST]

It was not formatted with the psp itself. It shouldn't be fragmented as it's a new card. I've read only that the only issue is longer xmb load times. I sure hope it hasn't gone fairly since it's only about a year old ordered from Etsy.

I'll format it using the PSP and re copy everything and see what happens. Any way to make the xmb or custom launcher cache the games to reduce load times?

[JoseAaronLopezGarcia]

The XMB already uses a cache for ISO files.

[PSPGOENTHUSIAST]

After formatting using the PSP I still can't get CSO files to work. I'll just convert them to iso

[JoseAaronLopezGarcia]

Try using ZSO or JSO, they are very fast. Ideally with 8K block size so you get better compression.

[PSPGOENTHUSIAST]

What windows programs can create those?

[krazynez]

https://github.com/PSP-Archive/ARK-4/tree/main/contrib/PC/ciso

[PSPGOENTHUSIAST]

Thanks. Any difference between zso or jso?

[JoseAaronLopezGarcia]

• Maxcso can create CSO, ZSO and DAX files of any block size but it's only command-line.
• PSP ISO Compressor v1.4 supports CSO, JSO and DAX with a nice GUI but doesn't allow changing block size.
• PSXiSO is a recently made GUI app that can compress ISO to CHD and ZSO.

As for JSO vs ZSO vs CSO vs DAX:

• ZSO is the fastest but has the worst compression.
• CSO and DAX are the slowest but have better compression.
• JSO is a middle ground, better speed than CSO and better compression than ZSO.

[PSPGOENTHUSIAST]

Perfect thanks I'll try them

[JoseAaronLopezGarcia]

If speed really is a must then you have to go for ZSO with 8K blocks, even if compression isn't as good as other formats (it's still better/smaller than ISO in most cases, while maintaining ISO speeds).

The only app that lets you create these is maxcso, which is a command-line tool.

[PSPGOENTHUSIAST]

Can you give me the command to create a zso with 8k blocks using Maxcso? I'm not the best with command line

[JoseAaronLopezGarcia]

it should be something like this:

maxcso --block=8192 --format=zso "My Game.iso"

[PSPGOENTHUSIAST]

I see. I just figured it out with jiso.exe. Should I still use Maxcso instead?

[JoseAaronLopezGarcia]

Try both and stick to whichever works best for you.

[PSPGOENTHUSIAST]

Is the compression algorithm for zso on jiso lzo or zlib?

[JoseAaronLopezGarcia]

jiso is for JSO not for ZSO

[PSPGOENTHUSIAST]

Gotcha. Jso files do boot from memory card

[PSPGOENTHUSIAST]

Unrelated but do y'all have a discord so I don't flood your GitHub page with issues or ideas?

[krazynez]

Unrelated but do y'all have a discord so I don't flood your GitHub page with issues or ideas?

Appreciate that: We are apart of the PSP Homebrew Community discord

[JoseAaronLopezGarcia]

Unrelated but do y'all have a discord so I don't flood your GitHub page with issues or ideas?

Appreciate that: We are apart of the PSP Homebrew Community discord

We should put this link somewhere easy to find.

[PSPGOENTHUSIAST]

Technically I still can't use CSO files but zso are much better so we can consider this solved. Probably just an issue with my setup

[krazynez]

verified OP stated can close via Discord