ROM Hack Castlevania: Portrait of Ruin save editor?

CHRoNiCWiLL · Dec 14, 2006

Any one develop a save editor program yet (Chinese is ok)?
Or maybe someone could help me hack a save file at the beginning of the game with quick exp and max money.

WangJang · Dec 14, 2006

can you upload a save ? i will take a look if i can find the checksum routine.

dsrules · Dec 14, 2006

or just use dipstar codes to cheat

WangJang · Dec 14, 2006

never mind about the save, i found one seems i can't get this save type working in the emulator

Sorry.

Normmatt · Dec 15, 2006

Which savetype is it and are you using the latest DeSmuME code?

WangJang · Dec 15, 2006

yea just grabbed a fresh snapshot and it seems to be working now, just need to find where the checksum is located inside the save so i can see where its been used.

donotbugme · Dec 16, 2006

how do you go about reversing it wang ?

WangJang · Dec 16, 2006

well i first find which part of the save file contains the checksum, then i set a breakpoint on reading of this section, from there i work from the assembly and see if its the correct part thats doing the checking.

I am busy for the next few days so i won't be able to play with this till then.

WangJang · Dec 16, 2006

Had a little free time so i tried a few extra stuff and i hit it lucky

I have the save checksum(s) figured out now there is more than one, trying to get a figure on the save format now, so i can see what needs fixing etc.

If anybody has some clues to the save format (layout) tell me please

it can save some great time.

thegame07 · Dec 16, 2006

i have a ds-x is there anyway i can help ???

WangJang · Dec 16, 2006

Nothing at the moment you can really do, thanks for asking though!

After loading the game onto a real flastcart i can see the menu's (yay!) so now i can see it is broken down into 6 slots + the quick save slot.

Regarding the save file checksum, its actually a "hash" after actually going through the algorithm a few times, and looking at the checksum it jumped out at me, it was a standard SHA-1 implementation.

3 Parts of the save file are Hashed, and stored in the bottom of the save file.

Main Header.
Data Block 1
Data Block 2

Main Header is one Hash

Data Block 1 + Block 2 are per slot, so if you used all 7 slots you would have (2 * 7) =14 Hash's + Main Hash inside the save file.

I have managed to locate the blocks + sizes for all of them, so as i said i have resigned the save file fine.

I am still a little wary on how the checksums are arranged though, but i think i have it correct so i am going to hunt some values down so i can edit some stuff and see how it goes from there.

thegame07 · Dec 16, 2006

love your work keep it up

i would have helped if i could

WangJang · Dec 17, 2006

I wouldn't mind having somebody beta test it later this week

i will pm you later if you are intrested.

I have all the data blocks and hash's sorted now and where they go etc.

Should have a basic editor out sometime this week.

dakine · Dec 17, 2006

i'd love to help beta test it. i'm pretty far in the game (more than half way) and i also have a dsx and ez4lite so i can test both to see if it works. again thanx for all the effort.

thegame07 · Dec 17, 2006

yeah i will be happy to help

pysio · Dec 17, 2006

game is very easy - 20h and 95% of all

-EX- · Dec 17, 2006

I have DS-X, SC Mini and the original Japanese cart as well, I can test saves on anything. I've finished the game, have all items list, all drops, I know everything about it. PM me when you need a test.

ferdz_33 · Dec 17, 2006

i'd love to beta test too. though i only have a supercard mini-sd to test it with.

chuuu · Dec 17, 2006

if you betatest, make sure you backup your savegame before editing

MohammadKoush · Dec 17, 2006

QUOTE(WangJang @ Dec 17 2006 said:
I wouldn't mind having somebody beta test it later this week

i will pm you later if you are intrested.

I have all the data blocks and hash's sorted now and where they go etc.

Should have a basic editor out sometime this week.

wow cant wait plz i am at the end boss and still low on power would love to try things on my save thanx

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