@noiob on a psx you can modify memory with that serial port in back - but I think on psp you're sol :(

@noiob * unless you rooted it...

@Fuego it's hacked and everything

@Fuego but I think I can load an earlier save and do a few things I missed, hope it's worth it

@noiob just disable the checksum check

@Fuego how do I do that

@noiob what firmware version do you have on it now

@Fuego 6.61

@Fuego sorry, 6.60

@noiob if youre using pro cfw the source is here:

https://www.openhub.net/p/pro-cfw

@Fuego Thanks but I think the software that validates PSX memcards is probably not the firmware but the PSX emulator?

@noiob wait a sec. its not like its signed. You can just rechecksum the file after changes...?

Looks like its per game and not in the system at all.

The same work in learning the format youd need to do to edit the savegame would let you bypass the check

@Fuego I know that the savefiles are a PSX memory card with a bit of a header (I know the PSX format a bit)

@noiob psx loader is in that firmware under 'popcorn' - it hooks and modifies the emulator, looks pretty easy to modify if you had to but yeah the save file integrity check is in silent hill itself

I thought the psp was doing when you said they were checks like the vita to prevent jailbreaking when you mentioned deleting corrupt saves

@Fuego I guess I should look into the save format anyways to be able to convert raw memcards into the PSX format, it'd be handy to be able to just swap savestates around

@noiob this code will probably get you much of the way there:

http://www.blackchocobo.com/downloads.php

@Fuego thanks!

@noiob if you make a silent hill trainer that'd be pretty cool :) Lemme know if you want help reversing the binary!

@Fuego I'm more interested in being able to move savegames between memory cards, I've been working on a psx memcard parser in Rust and I'll probably include an option to convert to/from PSP and PS3 at this point

It'd be an interesting project to look at Silent Hill more closely, though

@Fuego I've also been thinking of making a randomizer for a PSX game, the police station part of RE2 would be interesting

@noiob what sort of stuff do you want to randomize?

@Fuego Key item placement in a way that still makes the game solvable. Kinda similar to the Link To The Past randomizer, do you know that one?

@noiob oh yeah okay so thats totally doable with a bit of reversing and some mips asm

@noiob youd have to make a graph of how the puzzles work tho. I feel like thatd be the hardest part?

@ticky woah neat, I didn't know those existed!