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Author Topic: How saves work and checksums
pika
Farting Nudist
Member # 1908

Member Rated:
posted 07-08-2004 08:07 AM      Profile for pika   Author's Homepage   Email pika   Send New Private Message      Edit/Delete Post  Reply With Quote 
well I reversed sav files yesterday.
The game reads them in chunks of 0x1000bytes in each chunk at 0xFF4 there is an id - which tells the game where to put the chunk in gba ram and how many bytes to copy (usually 0xF80 bytes). It only does this if a checksum matches... well and I have writen a program which corrects these [Wink] .

If you want it get it and it's GPLed Source here:
http://web264.server46.rhs-it.de/pokepic/PSavFixV2.zip

Enjoy

- - - - -
"PIKA OF ALL PEOPLE IS THE BIGGEST TWO-FACED ASSHOLE HERE. AS HE ALREADY DEMONSTRATED HE SAID THAT THERE IS A WAY TO MAX OUT ALL STATS COMPLETELY ABOVE 510. WELL DUH...! HOW WOULD HE KNOW THAT IF HE DIDN'T HACK IT HIMSELF?! LOL! PATHETIC!"
TIDUSBLITZABESX

From: Silent Hill | Registered: Jun 2001  |  IP: Logged
MK
is somewhat large.
Member # 1445

Member Rated:
posted 07-11-2004 02:16 PM      Profile for MK     Send New Private Message      Edit/Delete Post  Reply With Quote 
hehe, sweet pika. Keep up the good work. [Smile]
Registered: Jan 2001  |  IP: Logged


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