psp saves to psx

Well... this is something to look at, but that technique seems to only PSP to PC/PS1 if you have this set up *before* you create the saves. How about you take a look at that in case it seems like something you can do (and would want to do), and I'll continue searching for a more direct (and compatible) solution to your question...


Edit: Oddly, it doesn't really seem like anybody has bothered to try this or even ask about it. I see a lot of similar topics, and a bunch of people asking about PS1 to PSP, but not the other way. I don't have my PSP anymore, so I can't check this, but... can you at least get the save files, in whatever format they're in, from the PSP to PC? If I recall correctly, there's a folder on the memory stick that holds this data, but I can't remember if the PS1 game saves (memory card files, basically), are separate files like they are for PS1 emulators.

If there are any files whose names indicate they are PS1 saves, could you possibly copy them off the PSP and upload them someplace for me to take a look at? If you can't tell if any of them are saves for PS1 games, could you just zip *all* the files in that folder to an archive and just upload the archive?

ok i finally found the gamecode for ff9 and its corresponding folder. the files inside are:

config.bin
icon0.png
param.sfo
scevmc0.vmp
scevmc1.vmp

I can be of some assistance on this particular topic, I believe.

config.bin contains configuration information for the PS1 emulation.
icon0.png contains the graphic icon for the save file.
param.sfo contains actual data on the save-- which game it belongs to, the title, etc.
scevmc0 and scevmc1 are the memory card files for the two slots respectively.

NOW we hit the problem point.

The memory card files are MCR-format with a header at the front. The header contains a checksum of the image. We don't know how the checksum is calculated. While it's possible to convert the scevmc files by pulling the header off and it'll work just fine with pSX/ePSXe...

..conversion BACK to load it into the PSP isn't going to work without knowing how the checksum works. There's a workaround using the PSP cheat plugin for custom firmware that lets you directly import a MCR back into the PS1 emulation during the disc boot process, but that's a few extra steps.

Basically, until the checksum is worked out, there's not a hell of a lot we can do.

heres the link. in rar form.

rapidshare.com/files/81915598/SLUS01251.rar.html

anyway thanks in advance!

Glad to hear it works. I was thinking that the .vmp files could probably be converted... either with a program, or by some hex editing. I'm certainly glad that it was the first choice.

Very true. And... I'd like to investigate the problem of converting from .mcr to .vmp. That leads to a request...

Anybody around here who has any PS1 saves on their PSP in this format, could you please upload your save folders for me to play around with? Or if you know a site that contains an archive of them, could you direct me to that? Unfortunately, without my PSP, I can't use the saves I used to have (unless my roommate still has his memstick, which I doubt). I'd really like to see if I could work out some way to convert *both* ways.

Only problem is... GameFAQs doesn't seem to have PSP saves of PS1 games. Saves for PSP games wouldn't be so useful to me, because I can't convert them to a known format for me to compare with. I basically want to figure out how the checksum is figured out for a PS1 game save, and the PSP saves won't really help me with that if the headers are different, not to mention it probably wouldn't be using the same areas of data within the save to generate the checksum, which is a primary focus of my research.